River Level Monitoring Stations by River

Aber Burn Scotland (Dunbartonshire) - 1 monitoring station
Abhainn a Bhealaich Scotland (Argyll and Bute) - 1 monitoring station
Abhainn a Chnocain Scotland (Sutherland) - 1 monitoring station
Abhainn Bruachaig Scotland (Ross and Cromarty) - 1 monitoring station
Abhainn Roag Scotland (Western Isles) - 1 monitoring station
Achray Water Scotland (Stirling and Falkirk) - 1 monitoring station
Addlestone Bourne England (Surrey) - 2 monitoring stations
Adur () - 1 monitoring station
River Adur England (West Sussex) - 3 monitoring stations
Aeron Wales (Dyfed) - 2 monitoring stations
Afan Wales (West Glamorgan) - 3 monitoring stations
Afon Bran () - 2 monitoring stations
Afon Wyre Wales (Dyfed) - 1 monitoring station
River Aire England (West Yorkshire, North Yorkshire, East Riding of Yorkshire) - 23 monitoring stations
Aire Washlands England (West Yorkshire, North Yorkshire) - 5 monitoring stations
Alconbury Brook England (Cambridgeshire) - 2 monitoring stations
Aldbourne () - 2 monitoring stations
River Aldbourne England (Wiltshire) - 2 monitoring stations
River Alde England (Suffolk) - 1 monitoring station
Aldford brook England (Cheshire) - 1 monitoring station
Aldingbourne Rife England (West Sussex) - 1 monitoring station
Ale Water Scotland (Roxburgh, Ettrick and Lauderdale) - 1 monitoring station
Aline Scotland (Inverness) - 1 monitoring station
Allan Water Scotland (Stirling and Falkirk) - 2 monitoring stations
Allander Water Scotland (Dunbartonshire) - 1 monitoring station
River Allen (downstream) England (Cornwall) - 1 monitoring station
River Allen, Cornwall England (Cornwall) - 1 monitoring station
River Allen, Dorset England (Dorset) - 1 monitoring station
River Aller England (Somerset) - 1 monitoring station
Aller Brook England (Devon) - 1 monitoring station
Allison Dyke England (West Yorkshire) - 1 monitoring station
Allt a Ghlas-chamaich Scotland (Ross and Cromarty) - 1 monitoring station
Allt Coire nan Con Scotland (Inverness) - 1 monitoring station
Allt Deveron Scotland (Banffshire) - 1 monitoring station
Allt Srath a Ghlinne Scotland (Perth and Kinross) - 1 monitoring station
Almond (Lothian) Scotland (West Lothian, City of Edinburgh) - 3 monitoring stations
Almond (Tayside) Scotland (Perth and Kinross) - 2 monitoring stations
River Alne England (Warwickshire) - 2 monitoring stations
Alness Scotland (Ross and Cromarty) - 1 monitoring station
Alphin Brook England (Devon) - 1 monitoring station
Alre () - 1 monitoring station
River Alre England (Hampshire) - 2 monitoring stations
Alt () - 1 monitoring station
River Alt England (Merseyside) - 1 monitoring station
River Alver England (Hampshire) - 1 monitoring station
Alverthorpe Beck England (West Yorkshire) - 2 monitoring stations
Alwen Wales (Clwyd) - 1 monitoring station
Alyn Wales (Clwyd) - 5 monitoring stations
River Amber England (Derbyshire) - 1 monitoring station
Amman Wales (Dyfed) - 1 monitoring station
Ampney Brook England (Gloucestershire, Wiltshire) - 2 monitoring stations
Amwell Loop England (Hertfordshire) - 1 monitoring station
Ancholme England (Lincolnshire) - 1 monitoring station
River Ancholme England (Lincolnshire) - 2 monitoring stations
River Anker England (Warwickshire) - 3 monitoring stations
Annan Scotland (Dumfries) - 3 monitoring stations
Annick Water Scotland (Ayrshire and Arran) - 3 monitoring stations
River Ant England (Norfolk) - 1 monitoring station
River Anton England (Hampshire) - 3 monitoring stations
Ardle Scotland (Perth and Kinross) - 1 monitoring station
Arkle Beck England (North Yorkshire) - 1 monitoring station
Arrow England, Wales (Herefordshire, Powys) - 3 monitoring stations
River Arrow England (Warwickshire) - 2 monitoring stations
Arrowe Brook England (Merseyside) - 2 monitoring stations
Arun () - 7 monitoring stations
River Arun England (West Sussex, East Sussex) - 9 monitoring stations
Ash (Hertfordshire) England (Hertfordshire) - 3 monitoring stations
Ash (Surrey) England (Surrey) - 2 monitoring stations
Ash Brook England (Shropshire) - 1 monitoring station
River Ashburn England (Devon) - 2 monitoring stations
River Asker England (Dorset) - 2 monitoring stations
Atherfield Brook England (Isle of Wight) - 1 monitoring station
Auldhouse Burn Scotland (Renfrewshire) - 1 monitoring station
Avich Scotland (Argyll and Bute) - 1 monitoring station
Avon (Forth Valley) Scotland (Stirling and Falkirk) - 1 monitoring station
River Avon (River Aune), Devon England (Devon) - 2 monitoring stations
River Avon (Shakespeare's Avon) England (Warwickshire, Worcestershire, Gloucestershire, Leicestershire) - 11 monitoring stations
Avon (Spey) Scotland (Banffshire) - 1 monitoring station
Avon Water Scotland (Lanarkshire) - 2 monitoring stations
River Avon, Bristol England (Somerset, Wiltshire, Bristol) - 8 monitoring stations
River Avon, Hampshire England (Wiltshire, Hampshire, Dorset) - 9 monitoring stations
Avondhu Burn Scotland (Stirling and Falkirk) - 1 monitoring station
River Axe, Bristol England (Somerset) - 1 monitoring station
River Axe, Lyme Bay England (Devon, Somerset, Dorset) - 4 monitoring stations
Ayr Scotland (Ayrshire and Arran) - 4 monitoring stations
Babingley () - 1 monitoring station
Babingley River England (Norfolk) - 1 monitoring station
Back Burn (Borders) Scotland (Berwickshire) - 1 monitoring station
Back Delfin England (East Riding of Yorkshire) - 1 monitoring station
Badsey Brook England (Worcestershire) - 1 monitoring station
Bagley Brook England (Shropshire) - 1 monitoring station
Bagley Dike England (South Yorkshire) - 1 monitoring station
Baguley Brook England (Greater Manchester) - 1 monitoring station
Baildon Dyke England (West Yorkshire) - 1 monitoring station
Bain () - 2 monitoring stations
River Bain England (Lincolnshire) - 3 monitoring stations
Baker Lane Brook England (Nottinghamshire) - 1 monitoring station
Balne Beck England (West Yorkshire) - 1 monitoring station
Bannock Burn Scotland (Stirling and Falkirk) - 1 monitoring station
Banwy Wales (Powys) - 1 monitoring station
Barbourne Brook England (Worcestershire) - 2 monitoring stations
Bardsey Beck England (West Yorkshire) - 1 monitoring station
Barge Canal England (Hampshire) - 1 monitoring station
Barkby Brook England (Leicestershire) - 1 monitoring station
River Barle England (Somerset) - 2 monitoring stations
Barlings Eau England (Lincolnshire) - 1 monitoring station
Barmston Drain () - 2 monitoring stations
Barmston Main Drain England (East Riding of Yorkshire) - 1 monitoring station
Barnham Rife England (West Sussex) - 1 monitoring station
Bartley Water England (Hampshire) - 3 monitoring stations
Barton Haven England (Lincolnshire) - 1 monitoring station
Bassenthwaite Lake England (Cumbria) - 1 monitoring station
River Batherm England (Devon) - 1 monitoring station
Batley Beck England (West Yorkshire) - 3 monitoring stations
Beal () - 2 monitoring stations
River Beal England (Greater Manchester) - 2 monitoring stations
Beam () - 1 monitoring station
River Beam England (Greater London) - 1 monitoring station
Beane () - 4 monitoring stations
River Beane England (Hertfordshire) - 4 monitoring stations
Bear Brook England (Buckinghamshire) - 1 monitoring station
Beaulieu River England (Hampshire) - 2 monitoring stations
River Beault () - 2 monitoring stations
Beauly Scotland (Inverness) - 2 monitoring stations
Beauly Firth Scotland (Inverness) - 1 monitoring station
Beauvale Brook England (Nottinghamshire) - 1 monitoring station
Bechan Brook Wales (Powys) - 1 monitoring station
Beck Brook () - 1 monitoring station
Bedale Beck England (North Yorkshire) - 1 monitoring station
Bedburn Beck England (Durham) - 1 monitoring station
River Bela England (Cumbria) - 1 monitoring station
Belford Burn England (Northumberland) - 1 monitoring station
Beoch Lane Scotland (Ayrshire and Arran) - 1 monitoring station
Bervie Scotland (Kincardineshire) - 1 monitoring station
Beult () - 2 monitoring stations
River Beult England (Kent) - 2 monitoring stations
Beverley and Barmston Drain England (East Riding of Yorkshire) - 2 monitoring stations
Beverley Brook England (Greater London) - 5 monitoring stations
Bickerly Mill Stream England (Hampshire) - 1 monitoring station
Bielby Beck England (East Riding of Yorkshire) - 1 monitoring station
Billinghay Skirth England (Lincolnshire) - 1 monitoring station
Bin Brook England (Cambridgeshire) - 1 monitoring station
Birket () - 2 monitoring stations
River Birket England (Merseyside) - 2 monitoring stations
Birkey Burn England (Northumberland) - 1 monitoring station
Bishop Monkton Beck England (North Yorkshire) - 1 monitoring station
River Biss England (Wiltshire) - 1 monitoring station
Black Brook England (Leicestershire) - 1 monitoring station
Black Brook (Soar) () - 1 monitoring station
Black Burn Scotland (Moray) - 1 monitoring station
Black Cart Water Scotland (Renfrewshire) - 1 monitoring station
Blackadder Water Scotland (Berwickshire) - 1 monitoring station
Blackburn Brook England (South Yorkshire) - 2 monitoring stations
Blackfoss Beck England (East Riding of Yorkshire) - 1 monitoring station
Blackwater Scotland (Ross and Cromarty) - 1 monitoring station
Blackwater of Dee Scotland (Wigtown) - 1 monitoring station
River Blackwater, Essex England (Essex) - 2 monitoring stations
River Blackwater, Loddon England (Berkshire, Surrey, Hampshire) - 6 monitoring stations
Blacup Beck England (West Yorkshire) - 1 monitoring station
Bladnoch Scotland (Wigtown) - 1 monitoring station
Blakewater () - 1 monitoring station
River Blakewater England (Lancashire) - 1 monitoring station
Blane Water Scotland (Stirling and Falkirk) - 1 monitoring station
Blind Beck England (Cumbria) - 1 monitoring station
River Blithe England (Staffordshire) - 2 monitoring stations
Bloxham Brook England (Oxfordshire) - 1 monitoring station
Blue Beck England (North Yorkshire) - 1 monitoring station
Blyth () - 1 monitoring station
River Blyth England (Northumberland) - 1 monitoring station
River Blythe England (Warwickshire, West Midlands) - 2 monitoring stations
Bodmin Town Leat England (Cornwall) - 1 monitoring station
Bogie Scotland (Aberdeenshire) - 1 monitoring station
Bolingey Stream England (Cornwall) - 1 monitoring station
Bollin () - 4 monitoring stations
River Bollin England (Cheshire, Greater Manchester) - 4 monitoring stations
Bonny Water Scotland (Stirling and Falkirk) - 1 monitoring station
Borehamwood Brook England (Hertfordshire) - 1 monitoring station
Borgie Scotland (Sutherland) - 1 monitoring station
Borough Beck England (North Yorkshire) - 1 monitoring station
Borsdane Brook England (Greater Manchester) - 1 monitoring station
Bosham Stream England (West Sussex) - 1 monitoring station
Bothlin Burn Scotland (Dunbartonshire) - 1 monitoring station
Bottle Brook England (Derbyshire) - 1 monitoring station
Boundary Brook England (Nottinghamshire) - 1 monitoring station
Bourn Brook England (Cambridgeshire) - 2 monitoring stations
River Bourne England (Wiltshire) - 3 monitoring stations
Bourne Brook England (Staffordshire) - 1 monitoring station
Bourne Rivulet England (Hampshire) - 2 monitoring stations
Bourne Tributary Medway England (Kent) - 1 monitoring station
Boverton Brook Wales (South Glamorgan) - 1 monitoring station
River Bovey England (Devon) - 2 monitoring stations
River Bovey Tributary England (Devon) - 1 monitoring station
Bow Brook England (Worcestershire) - 2 monitoring stations
Bowmont Water England (Northumberland) - 1 monitoring station
River Box England (Suffolk) - 2 monitoring stations
Boyces Brook England (Lancashire) - 1 monitoring station
River Boyd England (Gloucestershire) - 2 monitoring stations
Braan Scotland (Perth and Kinross) - 1 monitoring station
Bradford Beck England (West Yorkshire) - 1 monitoring station
Bradiford Water England (Devon) - 1 monitoring station
Bradley Brook England (Gloucestershire) - 1 monitoring station
Bradwell Brook England (West Midlands) - 1 monitoring station
Braid Burn Scotland (City of Edinburgh) - 1 monitoring station
River Brain England (Essex) - 1 monitoring station
Bramham Beck England (West Yorkshire) - 1 monitoring station
Brampton Beck England (Cumbria) - 1 monitoring station
River Bran Scotland (Ross and Cromarty) - 1 monitoring station
Bran (Llandovery) Wales (Dyfed) - 1 monitoring station
Bran (Llangadog) Wales (Dyfed) - 1 monitoring station
Brant () - 2 monitoring stations
River Brant England (Lincolnshire) - 2 monitoring stations
River Brathay England (Cumbria) - 1 monitoring station
Braunstone Brook England (Leicestershire) - 1 monitoring station
River Bray England (Devon) - 2 monitoring stations
Brede () - 2 monitoring stations
River Brede England (East Sussex) - 1 monitoring station
Brennig Wales (Dyfed) - 1 monitoring station
Brent () - 5 monitoring stations
River Brent England (Greater London) - 5 monitoring stations
River Brett England (Suffolk) - 2 monitoring stations
River Bride England (Dorset) - 1 monitoring station
Bridgehouse Beck England (West Yorkshire) - 1 monitoring station
Brighouse Burn Scotland (The Stewartry of Kirkcudbright) - 1 monitoring station
Brinkworth Brook England (Wiltshire) - 2 monitoring stations
Brislington Brook England (Bristol) - 1 monitoring station
Bristol Frome England (Bristol, Gloucestershire) - 6 monitoring stations
River Brit England (Dorset) - 2 monitoring stations
Broad Fleet England (Lancashire) - 1 monitoring station
Broadfleet () - 1 monitoring station
Broadlane Beck England (East Riding of Yorkshire) - 1 monitoring station
Brock () - 2 monitoring stations
River Brock England (Lancashire) - 2 monitoring stations
Brompton Beck England (North Yorkshire) - 2 monitoring stations
Brook Dike England (South Yorkshire) - 1 monitoring station
Broom Scotland (Ross and Cromarty) - 1 monitoring station
Brora Scotland (Sutherland) - 1 monitoring station
Brothock Water Scotland (Angus) - 1 monitoring station
Brough Beck England (North Yorkshire) - 2 monitoring stations
Brough Clough England (East Riding of Yorkshire) - 1 monitoring station
Broughton Beck England (North Yorkshire) - 1 monitoring station
Broughton Brook England (Buckinghamshire) - 1 monitoring station
River Browney England (Durham) - 1 monitoring station
Browney Dyke England (North Yorkshire) - 1 monitoring station
Brownwich Stream England (Hampshire) - 1 monitoring station
Brox Burn (East Lothian) Scotland (East Lothian) - 1 monitoring station
River Brue England (Somerset) - 4 monitoring stations
Brun () - 1 monitoring station
River Brun England (Lancashire) - 1 monitoring station
Buck Beck England (Lincolnshire) - 1 monitoring station
Budleigh Brook England (Devon) - 2 monitoring stations
Bulbourne () - 2 monitoring stations
River Bulbourne England (Hertfordshire) - 2 monitoring stations
Bull () - 2 monitoring stations
River Bull England (East Sussex) - 2 monitoring stations
Bulstake Stream England (Oxfordshire) - 1 monitoring station
Bumpstead Brook England (Essex) - 1 monitoring station
River Bure England (Norfolk) - 6 monitoring stations
River Burn England (Norfolk) - 1 monitoring station
Burn of Deskford Scotland (Banffshire) - 1 monitoring station
Burn Valley Beck England (Durham) - 2 monitoring stations
Burrelton Burn Scotland (Perth and Kinross) - 1 monitoring station
Burrow Beck England (Lancashire) - 1 monitoring station
Burstow Stream England (Surrey) - 2 monitoring stations
Burstwick Drain England (East Riding of Yorkshire) - 3 monitoring stations
Bury Brook England (Cambridgeshire) - 1 monitoring station
Bushby Brook England (Leicestershire) - 2 monitoring stations
Bushy Beck England (West Yorkshire) - 1 monitoring station
By Brook England (Wiltshire) - 2 monitoring stations
River Caen England (Devon) - 2 monitoring stations
River Caen (Tidal) England (Devon) - 1 monitoring station
Cain Wales (Powys) - 2 monitoring stations
Caker Stream England (Hampshire) - 1 monitoring station
River Calder, Cumbria England (Cumbria) - 1 monitoring station
River Calder, Lancashire England (Lancashire) - 4 monitoring stations
River Calder, West Yorkshire England (West Yorkshire) - 17 monitoring stations
Caldew () - 2 monitoring stations
River Caldew England (Cumbria) - 4 monitoring stations
River Cale England (Somerset) - 1 monitoring station
Calow Brook England (Derbyshire) - 1 monitoring station
River Cam (Granta) England (Cambridgeshire, Essex) - 4 monitoring stations
River Cam, Gloucestershire England (Gloucestershire) - 1 monitoring station
River Cam, Somerset England (Somerset) - 1 monitoring station
River Camel England (Cornwall) - 4 monitoring stations
Camlad Wales (Powys) - 1 monitoring station
River Can England (Essex) - 1 monitoring station
Canaird Scotland (Ross and Cromarty) - 1 monitoring station
Cander Water Scotland (Lanarkshire) - 1 monitoring station
Candover Stream England (Hampshire) - 1 monitoring station
Canley Brook England (West Midlands) - 2 monitoring stations
Cannington Brook England (Somerset) - 1 monitoring station
Cannon Brook England (Greater London) - 1 monitoring station
Canons Brook England (Essex) - 1 monitoring station
Carden Brook England (Cheshire) - 1 monitoring station
Carnon River England (Cornwall) - 1 monitoring station
Carr Brook England (South Yorkshire) - 1 monitoring station
Carradale Water Scotland (Argyll and Bute) - 1 monitoring station
Carron Scotland (Kincardineshire) - 1 monitoring station
Carron (Forth Valley) Scotland (Stirling and Falkirk) - 1 monitoring station
Carron (Sutherland) Scotland (Sutherland) - 1 monitoring station
Carron (Wester Ross) Scotland (Ross and Cromarty) - 1 monitoring station
Carron Water Scotland (Kincardineshire) - 2 monitoring stations
Cartlett Brook Wales (Dyfed) - 1 monitoring station
Cassley Scotland (Sutherland) - 1 monitoring station
Catcliffe Drain England (South Yorkshire) - 1 monitoring station
Caterham Bourne England (Surrey, Greater London) - 1 monitoring station
Cefni Wales (Gwynedd) - 1 monitoring station
Ceiriog Wales (Shropshire) - 1 monitoring station
Cerist Wales (Gwynedd) - 1 monitoring station
Cessnock Water Scotland (Ayrshire and Arran) - 1 monitoring station
Ceulan Wales (Dyfed) - 1 monitoring station
Chad Brook England (Suffolk) - 1 monitoring station
Chalgrove Brook England (Oxfordshire) - 1 monitoring station
River Char England (Dorset) - 1 monitoring station
Charlton Brook England (South Yorkshire) - 1 monitoring station
Chater () - 1 monitoring station
River Chater England (Rutland) - 1 monitoring station
Cheddar Yeo England (Somerset) - 1 monitoring station
River Chelmer England (Essex) - 3 monitoring stations
Chelt () - 5 monitoring stations
River Chelt England (Gloucestershire) - 5 monitoring stations
Cheriton Stream England (Hampshire) - 1 monitoring station
Chertsey Bourne England (Surrey) - 4 monitoring stations
Cherwell England (Oxfordshire) - 1 monitoring station
River Cherwell England (Oxfordshire, Northamptonshire) - 9 monitoring stations
Chess () - 2 monitoring stations
River Chess England (Hertfordshire, Buckinghamshire) - 2 monitoring stations
River Chew England (Somerset) - 1 monitoring station
Chew River () - 1 monitoring station
Chew Stoke Brook England (Somerset) - 1 monitoring station
Ching Brook England (Greater London) - 2 monitoring stations
Chitterne Brook England (Wiltshire) - 1 monitoring station
Christchurch Coast England (Dorset) - 1 monitoring station
Church Beck England (Cumbria) - 1 monitoring station
Churn () - 3 monitoring stations
River Churn England (Gloucestershire) - 3 monitoring stations
River Churnet England (Staffordshire) - 5 monitoring stations
Clackers Brook England (Wiltshire) - 1 monitoring station
Clanfield Brook England (Oxfordshire) - 1 monitoring station
Clarach Wales (Dyfed) - 1 monitoring station
Clay Coton Brook England (Northamptonshire) - 1 monitoring station
Clennon Valley Watercourse England (Somerset) - 1 monitoring station
Clifton Beck England (West Yorkshire) - 1 monitoring station
Clipstone Brook England (Bedfordshire) - 1 monitoring station
Clow Beck England (North Yorkshire) - 1 monitoring station
Cluden Water Scotland (Dumfries) - 1 monitoring station
Clun () - 1 monitoring station
River Clun England (Shropshire) - 1 monitoring station
Clwyd Wales (Clwyd) - 4 monitoring stations
Clydach Brook Wales (West Glamorgan) - 1 monitoring station
Clyde Scotland (Lanarkshire, Renfrewshire) - 6 monitoring stations
Clyne Wales (West Glamorgan) - 1 monitoring station
River Clyst England (Devon) - 3 monitoring stations
River Clyst Tributary England (Devon) - 2 monitoring stations
Clywedog () - 1 monitoring station
Clywedog (Severn) Wales (Powys) - 1 monitoring station
Coal Burn England (Northumberland) - 1 monitoring station
Coastal Stream England (Cornwall) - 1 monitoring station
Cobbins Brook England (Essex) - 2 monitoring stations
Cober () - 1 monitoring station
River Cober England (Cornwall) - 4 monitoring stations
Cock Beck England (West Yorkshire) - 1 monitoring station
River Cocker England (Cumbria) - 3 monitoring stations
Cocker Beck England (Nottinghamshire) - 1 monitoring station
Cockers Dyke England (Lancashire) - 1 monitoring station
Cockshaw Burn England (Northumberland) - 3 monitoring stations
Cod Beck England (North Yorkshire) - 3 monitoring stations
Cogtail Burn Scotland (East Lothian) - 1 monitoring station
Coilte Scotland (Inverness) - 1 monitoring station
Cole England (Wiltshire, Oxfordshire) - 2 monitoring stations
River Cole England (Worcestershire, West Midlands, Warwickshire) - 3 monitoring stations
Cole Brook England (Devon) - 1 monitoring station
Colliston Burn Scotland (Angus) - 1 monitoring station
Colliters Brook England (Somerset) - 1 monitoring station
Coln () - 3 monitoring stations
River Coln England (Gloucestershire) - 3 monitoring stations
Colne Brook England (Berkshire, Buckinghamshire) - 2 monitoring stations
Colne Water England (Lancashire) - 1 monitoring station
River Colne, Essex England (Essex) - 3 monitoring stations
River Colne, Hertfordshire England (Buckinghamshire, Greater London, Surrey, Hertfordshire) - 8 monitoring stations
River Colne, West Yorkshire England (West Yorkshire) - 4 monitoring stations
Colwyn Wales (Gwynedd) - 1 monitoring station
River Coly England (Devon) - 1 monitoring station
Combe Haven England (East Sussex) - 1 monitoring station
Conder () - 1 monitoring station
River Conder England (Lancashire) - 1 monitoring station
Coney Gut England (Devon) - 2 monitoring stations
Congresbury Yeo England (Somerset) - 1 monitoring station
Coniston Water England (Cumbria) - 1 monitoring station
Conon Scotland (Ross and Cromarty) - 3 monitoring stations
Conwy Wales (Clwyd) - 3 monitoring stations
Coppice Brook England (Derbyshire) - 1 monitoring station
River Coquet England (Northumberland) - 4 monitoring stations
River Corve England (Shropshire) - 1 monitoring station
Costa Beck England (North Yorkshire) - 1 monitoring station
Cothi Wales (Dyfed) - 1 monitoring station
Cound Brook England (Shropshire) - 1 monitoring station
Counter Drain England (Cambridgeshire) - 1 monitoring station
Cove Brook England (Hampshire) - 2 monitoring stations
Cowal/Clyde Sealochs Coastal Scotland (Argyll and Bute) - 1 monitoring station
Cowbridge Beck England (Durham) - 1 monitoring station
Cragg Brook England (West Yorkshire) - 1 monitoring station
Crake () - 1 monitoring station
River Crake England (Cumbria) - 1 monitoring station
Crane () - 2 monitoring stations
River Crane England (Greater London) - 2 monitoring stations
Cranleigh Waters England (Surrey) - 2 monitoring stations
Cray () - 2 monitoring stations
River Cray England (Greater London) - 2 monitoring stations
Cree Scotland (Wigtown) - 2 monitoring stations
Creed Scotland (Western Isles) - 1 monitoring station
River Creedy England (Devon) - 2 monitoring stations
River Crimple England (North Yorkshire) - 1 monitoring station
Cripsey Brook England (Essex) - 2 monitoring stations
Croal () - 1 monitoring station
River Croal England (Greater Manchester) - 1 monitoring station
Cromarty Coastal Scotland (Ross and Cromarty) - 1 monitoring station
Cromarty Firth Scotland (Ross and Cromarty) - 1 monitoring station
Crook Beck England (Durham) - 1 monitoring station
River Crouch England (Essex) - 2 monitoring stations
Crow Green Stream England (Devon) - 1 monitoring station
Cuckmere () - 2 monitoring stations
River Cuckmere England (East Sussex) - 1 monitoring station
Cuckmere & Pevensey Levels England (East Sussex) - 1 monitoring station
River Culm England (Devon) - 3 monitoring stations
Cundall Beck England (North Yorkshire) - 1 monitoring station
Cunsey Beck England (Cumbria) - 1 monitoring station
Currymoor Drain England (Somerset) - 1 monitoring station
Cynin Wales (Dyfed) - 1 monitoring station
Cynon Wales (Mid Glamorgan) - 3 monitoring stations
Dacre Beck England (Cumbria) - 1 monitoring station
Dafen Wales (Dyfed) - 1 monitoring station
Dane () - 3 monitoring stations
River Dane England (Cheshire, Staffordshire) - 3 monitoring stations
Danes Stream England (Hampshire) - 2 monitoring stations
Daniels Brook England (Gloucestershire) - 2 monitoring stations
Darent () - 2 monitoring stations
River Darent England (Kent, Greater London) - 6 monitoring stations
Dargall Lane Scotland (Wigtown) - 1 monitoring station
River Dart England (Devon) - 1 monitoring station
Darwen () - 3 monitoring stations
River Darwen England (Lancashire) - 4 monitoring stations
Dauntsey Brook England (Wiltshire) - 1 monitoring station
Dawlish Water England (Devon) - 1 monitoring station
Day Brook England (Nottinghamshire) - 1 monitoring station
De Lank River England (Cornwall) - 1 monitoring station
Dean England (Cheshire) - 1 monitoring station
Dean Bottom Beck England (West Yorkshire) - 1 monitoring station
Dean Burn England (Devon) - 1 monitoring station
Dean Water Scotland (Perth and Kinross) - 1 monitoring station
Deans Brook England (Greater London) - 1 monitoring station
River Dearne England (South Yorkshire, West Yorkshire) - 8 monitoring stations
Dearne Washlands England (South Yorkshire) - 1 monitoring station
River Deben England (Suffolk) - 2 monitoring stations
Dee Wales, England (Clwyd, Gwynedd, Cheshire) - 8 monitoring stations
Dee (Grampian) Scotland (Aberdeenshire, City of Aberdeen) - 5 monitoring stations
Dee (Solway) Scotland (The Stewartry of Kirkcudbright) - 1 monitoring station
River Dene England (Warwickshire) - 2 monitoring stations
Derwent () - 1 monitoring station
Derwent (Northumbria) England (Northumberland) - 1 monitoring station
River Derwent, Cumbria England (Cumbria) - 4 monitoring stations
River Derwent, Derbyshire England (Derbyshire) - 6 monitoring stations
River Derwent, Northumberland England (Durham, Tyne & Wear) - 2 monitoring stations
River Derwent, Yorkshire England (North Yorkshire, East Riding of Yorkshire) - 12 monitoring stations
Derwentwater England (Cumbria) - 1 monitoring station
River Dever England (Hampshire) - 1 monitoring station
Deveron Scotland (Aberdeenshire, Banffshire) - 3 monitoring stations
Devon Scotland (Clackmannan, Perth and Kinross) - 1 monitoring station
River Devon England (Leicestershire) - 1 monitoring station
Dewi Fawr Wales (Dyfed) - 1 monitoring station
Dighty Water Scotland (City of Dundee) - 1 monitoring station
Dikler () - 1 monitoring station
River Dikler England (Gloucestershire) - 1 monitoring station
Dimore Brook England (Gloucestershire) - 2 monitoring stations
Dionard Scotland (Sutherland) - 1 monitoring station
Divie Scotland (Moray) - 1 monitoring station
Dochart Scotland (Stirling and Falkirk) - 1 monitoring station
Docken's Water England (Hampshire) - 1 monitoring station
River Doe Lea England (Derbyshire) - 1 monitoring station
Doethie Wales (Dyfed) - 1 monitoring station
Dollis Brook England (Greater London) - 2 monitoring stations
Don Scotland (Aberdeenshire) - 4 monitoring stations
River Don England (South Yorkshire) - 13 monitoring stations
Doniford Stream England (Somerset) - 3 monitoring stations
Doon Scotland (Ayrshire and Arran) - 1 monitoring station
Dorcan Brook England (Wiltshire) - 1 monitoring station
Dore () - 1 monitoring station
River Dore England (Herefordshire) - 1 monitoring station
Dorset Coast England (Dorset) - 5 monitoring stations
Douglas () - 5 monitoring stations
River Douglas England (Lancashire, Greater Manchester) - 5 monitoring stations
Douglas Water Scotland (Lanarkshire) - 1 monitoring station
River Dour England (Kent) - 2 monitoring stations
River Dove England (Derbyshire, Staffordshire, South Yorkshire, North Yorkshire) - 10 monitoring stations
Dover Beck England (Nottinghamshire) - 1 monitoring station
Dovers Brook England (Merseyside) - 1 monitoring station
Dowles Brook England (Shropshire) - 1 monitoring station
Dragley Beck England (Cumbria) - 1 monitoring station
Driffield Trout Stream England (East Riding of Yorkshire) - 1 monitoring station
River Drone England (Derbyshire) - 2 monitoring stations
Duchray Water Scotland (Stirling and Falkirk) - 2 monitoring stations
Duddon () - 2 monitoring stations
River Duddon England (Cumbria) - 2 monitoring stations
Dudwell Tributary Rother England (East Sussex) - 1 monitoring station
Dulais () - 5 monitoring stations
Dulais (Llanwrda) Wales (Dyfed) - 1 monitoring station
Dulais (Pwll) Wales (Dyfed) - 2 monitoring stations
Dulais on Loughor Wales (West Glamorgan) - 1 monitoring station
Dulais on Neath Wales (West Glamorgan) - 1 monitoring station
Dulas Wales (Powys) - 1 monitoring station
Dulas Brook England (Herefordshire) - 1 monitoring station
Dulnain Scotland (Inverness) - 1 monitoring station
Dun () - 1 monitoring station
River Dun England (Berkshire) - 1 monitoring station
Dun Navigation Canal England (South Yorkshire) - 1 monitoring station
Duneaton Water Scotland (Lanarkshire) - 1 monitoring station
River Dunsop England (Lancashire) - 1 monitoring station
Durkadale Burn Scotland (Orkney) - 1 monitoring station
Durranhill Beck England (Cumbria) - 1 monitoring station
Dwyfor Wales (Gwynedd) - 1 monitoring station
Dyfi Wales (Gwynedd) - 1 monitoring station
Dysynni Wales (Gwynedd) - 1 monitoring station
Ea Beck England (South Yorkshire, West Yorkshire) - 3 monitoring stations
Eagley Brook England (Greater Manchester) - 1 monitoring station
River Eamont England (Cumbria) - 2 monitoring stations
Earby Beck England (Lancashire) - 2 monitoring stations
Earn Scotland (Perth and Kinross) - 6 monitoring stations
Earn Water Scotland (Renfrewshire) - 1 monitoring station
Eas Daimh Scotland (Argyll and Bute) - 1 monitoring station
Eas Gobhain Scotland (Stirling and Falkirk) - 1 monitoring station
River East Allen England (Northumberland) - 1 monitoring station
East Clandon Stream England (Surrey) - 1 monitoring station
East Dart River England (Devon) - 1 monitoring station
East fen Catchwater England (Lincolnshire) - 1 monitoring station
East Glen (To Kates Bridge) () - 2 monitoring stations
East Glen River England (Lincolnshire) - 2 monitoring stations
East Lyn River England (Devon) - 1 monitoring station
East Okement River England (Devon) - 1 monitoring station
East Stour Trib Great Stour England (Kent) - 2 monitoring stations
East Wilder Brook England (Devon) - 1 monitoring station
Eastburn Beck England (North Yorkshire, West Yorkshire) - 2 monitoring stations
Eastern Cleddau Wales (Dyfed) - 1 monitoring station
Eastern Yar England (Isle of Wight) - 4 monitoring stations
River Eau England (Lincolnshire) - 1 monitoring station
River Ebble England (Wiltshire) - 2 monitoring stations
Ebbw Wales (Gwent) - 3 monitoring stations
River Ecclesbourne England (Derbyshire) - 1 monitoring station
Eddleston Water Scotland (Tweeddale) - 2 monitoring stations
Eden () - 7 monitoring stations
River Eden England (Cumbria) - 8 monitoring stations
Eden (Fife) Scotland (Fife) - 2 monitoring stations
Eden Tributary Medway England (Kent, Surrey) - 6 monitoring stations
Edgware Brook England (Greater London) - 1 monitoring station
Eea River England (Cumbria) - 1 monitoring station
Egginton Brook England (Derbyshire) - 1 monitoring station
River Ehen England (Cumbria) - 3 monitoring stations
Elan Wales (Powys) - 1 monitoring station
River Ellen England (Cumbria) - 1 monitoring station
Eller Beck England (North Yorkshire) - 4 monitoring stations
Elliot Water Scotland (Angus) - 1 monitoring station
Elvington Beck England (North Yorkshire) - 1 monitoring station
Elwy Wales (Clwyd) - 1 monitoring station
Ely Wales (Mid Glamorgan, South Glamorgan) - 2 monitoring stations
Emm Brook England (Berkshire) - 1 monitoring station
Emral Brook Wales (Clwyd) - 1 monitoring station
Ems () - 1 monitoring station
River Ems England (Hampshire) - 1 monitoring station
Enborne () - 1 monitoring station
River Enborne England (Berkshire) - 1 monitoring station
Endon Brook England (Staffordshire) - 1 monitoring station
Endrick Water Scotland (Stirling and Falkirk) - 2 monitoring stations
Enrick Scotland (Inverness) - 2 monitoring stations
Erch Wales (Gwynedd) - 1 monitoring station
River Erewash England (Derbyshire, Nottinghamshire) - 3 monitoring stations
Ericht Scotland (Perth and Kinross) - 1 monitoring station
Eridge Stream Tributary Medway England (East Sussex) - 1 monitoring station
River Erme England (Devon) - 2 monitoring stations
River Esk England (North Yorkshire) - 3 monitoring stations
Esk (Border) Scotland (Dumfries) - 1 monitoring station
Esk (Cumbria) England (Cumbria) - 1 monitoring station
Esk (Lothian) Scotland (East Lothian) - 1 monitoring station
Esk (Solway) Scotland (Dumfries) - 2 monitoring stations
Essex Coast England (Essex) - 2 monitoring stations
Etherow () - 2 monitoring stations
River Etherow England (Greater Manchester) - 2 monitoring stations
Ettrick Water Scotland (Roxburgh, Ettrick and Lauderdale) - 2 monitoring stations
Evan Water Scotland (Dumfries) - 1 monitoring station
Evenlode England (Oxfordshire, Gloucestershire) - 5 monitoring stations
Evington Brook England (Leicestershire) - 1 monitoring station
Ewe Scotland (Ross and Cromarty) - 1 monitoring station
Ewelme Brook England (Oxfordshire) - 1 monitoring station
Ewenny Wales (Mid Glamorgan) - 1 monitoring station
Ewenny Fawr Wales (Mid Glamorgan) - 1 monitoring station
Ewes Water Scotland (Dumfries) - 1 monitoring station
Ewnenny Fach Wales (Mid Glamorgan) - 1 monitoring station
Ewood Mill Race England (Lancashire) - 2 monitoring stations
River Exe England (Devon, Somerset) - 8 monitoring stations
Exe Estuary England (Devon) - 1 monitoring station
Exminster Marshes England (Devon) - 2 monitoring stations
River Eye Brook England (Leicestershire) - 1 monitoring station
Eye Water Scotland (Berwickshire) - 2 monitoring stations
River Fal England (Cornwall) - 2 monitoring stations
Falloch Scotland (Stirling and Falkirk) - 1 monitoring station
Farnley Beck England (West Yorkshire) - 1 monitoring station
Farrar Scotland (Inverness) - 1 monitoring station
Fenay Beck England (West Yorkshire) - 1 monitoring station
Feshie Scotland (Inverness) - 1 monitoring station
Feugh Scotland (Kincardineshire) - 1 monitoring station
Ffrwdwyllt Wales (West Glamorgan) - 2 monitoring stations
Field Drain England (Shropshire) - 1 monitoring station
Findhorn Scotland (Moray, Inverness) - 2 monitoring stations
Finham Brook England (Warwickshire) - 1 monitoring station
Firth of Clyde Scotland (Ayrshire and Arran) - 1 monitoring station
Firth of Forth Scotland (East Lothian) - 1 monitoring station
Firth of Lorn Scotland (Argyll and Bute) - 1 monitoring station
Firth of Tay Scotland (Fife) - 1 monitoring station
Fishlake Stream England (Hampshire) - 1 monitoring station
Fleet Drain England (East Riding of Yorkshire) - 1 monitoring station
River Flit England (Bedfordshire) - 1 monitoring station
Flood Channel England (Shropshire) - 1 monitoring station
River Font England (Northumberland) - 1 monitoring station
Ford Brook England (West Midlands) - 1 monitoring station
Ford Green Brook England (Staffordshire) - 1 monitoring station
Ford Stream England (Devon) - 1 monitoring station
Fords Lake Wales (Dyfed) - 1 monitoring station
Forth Scotland (Stirling and Falkirk) - 1 monitoring station
Fosdyke Canal England (Lincolnshire) - 1 monitoring station
River Foss England (North Yorkshire) - 3 monitoring stations
Foston Beck England (Lincolnshire) - 1 monitoring station
Foston Brook England (Derbyshire) - 1 monitoring station
Foudry Brook England (Berkshire) - 1 monitoring station
River Foulness England (East Riding of Yorkshire) - 2 monitoring stations
River Fowey England (Cornwall) - 3 monitoring stations
Fowlea Brook England (Staffordshire) - 1 monitoring station
Fowler Bridge Drain England (South Yorkshire) - 1 monitoring station
Frays () - 2 monitoring stations
Frays River England (Greater London) - 2 monitoring stations
Frodingham Beck England (East Riding of Yorkshire) - 1 monitoring station
Frogwy () - 1 monitoring station
River Frome England (Dorset) - 4 monitoring stations
River Frome (Severn) England (Gloucestershire) - 4 monitoring stations
River Frome (Wye) England (Herefordshire) - 3 monitoring stations
River Fromus England (Suffolk) - 1 monitoring station
Gaddesby Brook England (Leicestershire) - 1 monitoring station
Gade () - 2 monitoring stations
River Gade England (Hertfordshire) - 2 monitoring stations
Gairn Scotland (Aberdeenshire) - 1 monitoring station
Gala Water Scotland (Roxburgh, Ettrick and Lauderdale) - 2 monitoring stations
River Gannel England (Cornwall) - 1 monitoring station
Garnock Scotland (Ayrshire and Arran) - 3 monitoring stations
Garry (Ness) Scotland (Inverness) - 1 monitoring station
Garry (Tayside) Scotland (Perth and Kinross) - 1 monitoring station
Garry Burn Scotland (Perth and Kinross) - 1 monitoring station
Gatwick Stream England (West Sussex) - 3 monitoring stations
River Gaunless England (Durham) - 7 monitoring stations
Gauze Brook England (Wiltshire) - 1 monitoring station
Gelt () - 1 monitoring station
River Gelt England (Cumbria) - 1 monitoring station
Gelyn Wales (Gwynedd) - 1 monitoring station
Gifford Water Scotland (East Lothian) - 1 monitoring station
Gill Beck England (Cumbria) - 1 monitoring station
Gilwiskaw Brook England (Leicestershire) - 1 monitoring station
Ginge Brook England (Oxfordshire) - 1 monitoring station
River Gipping England (Suffolk) - 1 monitoring station
Girnock Burn Scotland (Aberdeenshire) - 1 monitoring station
Glaslyn Wales (Gwynedd) - 1 monitoring station
Glass Scotland (Inverness) - 2 monitoring stations
Glaze Brook England (Cheshire) - 1 monitoring station
Glazert Water Scotland (Dunbartonshire) - 2 monitoring stations
River Glem England (Suffolk) - 1 monitoring station
River Glen England (Lincolnshire) - 2 monitoring stations
Glen Stream England (Devon) - 1 monitoring station
River Glenderamackin England (Cumbria) - 1 monitoring station
Glendermackin () - 1 monitoring station
Glenridding Beck England (Cumbria) - 1 monitoring station
Glossop Brook England (Derbyshire) - 1 monitoring station
Glyme () - 1 monitoring station
River Glyme England (Oxfordshire) - 1 monitoring station
Gogar Burn Scotland (City of Edinburgh) - 1 monitoring station
Golden Brook England (Derbyshire) - 1 monitoring station
River Gowan England (Cumbria) - 1 monitoring station
Gowdall Ings England (East Riding of Yorkshire) - 1 monitoring station
Gowy () - 1 monitoring station
River Gowy England (Cheshire) - 1 monitoring station
Goyt () - 2 monitoring stations
River Goyt England (Derbyshire, Greater Manchester) - 2 monitoring stations
Grace Dieu Brook England (Leicestershire) - 1 monitoring station
River Granta England (Cambridgeshire) - 3 monitoring stations
Graveney () - 2 monitoring stations
River Graveney England (Greater London) - 2 monitoring stations
River Great Ouse England (Cambridgeshire, Buckinghamshire, Bedfordshire, Norfolk) - 33 monitoring stations
Great Stour England (Kent) - 9 monitoring stations
Green Burn Scotland (Wigtown) - 1 monitoring station
Green Dyke England (South Yorkshire) - 1 monitoring station
Greens Burn Scotland (Perth and Kinross) - 1 monitoring station
River Greet England (Nottinghamshire) - 1 monitoring station
Greta () - 1 monitoring station
River Greta, Cumbria England (Cumbria) - 2 monitoring stations
River Greta, Durham England (Durham) - 1 monitoring station
Grimescar Dike England (West Yorkshire) - 1 monitoring station
Gronw Wales (Dyfed) - 1 monitoring station
Grwyne Fawr Wales (Powys) - 1 monitoring station
Gryfe Scotland (Renfrewshire) - 1 monitoring station
Gurnard Luck England (Isle of Wight) - 1 monitoring station
Gwaun Wales (Dyfed) - 1 monitoring station
Gwendraeth Fach Wales (Dyfed) - 1 monitoring station
Gwendraeth Fawr Wales (Dyfed) - 2 monitoring stations
Gwili Wales (Dyfed) - 1 monitoring station
Gwydderig Wales (Dyfed) - 1 monitoring station
Gwyle England (Dorset) - 1 monitoring station
Gwyrfai Wales (Gwynedd) - 1 monitoring station
River Gypsey Race () - 1 monitoring station
Gypsey Race England (East Riding of Yorkshire) - 1 monitoring station
River Haddeo England (Somerset) - 4 monitoring stations
Hagnaby Beck England (Lincolnshire) - 1 monitoring station
Halford Stream England (Devon) - 1 monitoring station
Halladale Scotland (Sutherland) - 1 monitoring station
Halse Water England (Somerset) - 1 monitoring station
Halsewater () - 1 monitoring station
River Hamble England (Hampshire) - 3 monitoring stations
River Hamps England (Staffordshire) - 1 monitoring station
River Harbourne England (Devon) - 3 monitoring stations
River Harbourne Tributary England (Devon) - 1 monitoring station
Harpers Brook England (Northamptonshire) - 2 monitoring stations
Hart () - 4 monitoring stations
River Hart England (Hampshire) - 3 monitoring stations
River Hartburn England (Northumberland) - 1 monitoring station
Hartburn Beck England (Durham) - 1 monitoring station
Harwood Beck England (Durham) - 1 monitoring station
Hatherley Brook England (Gloucestershire) - 2 monitoring stations
Haw Beck () - 1 monitoring station
Haweswater Beck England (Cumbria) - 1 monitoring station
Haweswater Reservoir England (Cumbria) - 1 monitoring station
Hawkcombe Stream England (Somerset) - 1 monitoring station
River Hayle England (Cornwall) - 3 monitoring stations
River Hayle (Tidal) () - 1 monitoring station
Heacham River England (Norfolk) - 1 monitoring station
Hebble Brook England (West Yorkshire) - 1 monitoring station
Hebden Beck England (North Yorkshire) - 1 monitoring station
Hebden Water England (West Yorkshire) - 1 monitoring station
Heighington Beck England (Lincolnshire) - 1 monitoring station
Hele Stream England (Devon) - 1 monitoring station
Hellifield Beck England (North Yorkshire) - 1 monitoring station
Helmsdale Scotland (Sutherland) - 1 monitoring station
Henmore Brook England (Derbyshire) - 2 monitoring stations
Hepste Wales (Powys) - 1 monitoring station
Hermitage Stream England (Hampshire) - 1 monitoring station
Hermitage Water Scotland (Roxburgh, Ettrick and Lauderdale) - 1 monitoring station
Heys Brook England (Lancashire) - 1 monitoring station
Higher Brixham Watercourse England (Devon) - 1 monitoring station
Hillfarrance Brook England (Somerset) - 1 monitoring station
Hilton Brook England (Derbyshire) - 1 monitoring station
Hindburn () - 1 monitoring station
River Hindburn England (Lancashire) - 1 monitoring station
Hinksey Stream England (Oxfordshire, Surrey) - 2 monitoring stations
River Hipper England (Derbyshire) - 3 monitoring stations
River Hiz England (Bedfordshire) - 1 monitoring station
Hodder () - 1 monitoring station
River Hodder England (Lancashire) - 1 monitoring station
Hodge Beck England (North Yorkshire) - 1 monitoring station
Hoe Stream England (Surrey) - 1 monitoring station
Hogshaw Brook England (Derbyshire) - 1 monitoring station
Hogsmill () - 3 monitoring stations
Hogsmill River England (Surrey, Greater London) - 3 monitoring stations
Hol Beck England (West Yorkshire) - 1 monitoring station
Holderness drain England (East Riding of Yorkshire) - 3 monitoring stations
Holgate Beck England (North Yorkshire) - 1 monitoring station
River Holme England (West Yorkshire) - 2 monitoring stations
Holme Brook England (Derbyshire) - 1 monitoring station
Honddu Wales (Gwent, Powys) - 1 monitoring station
River Hooke England (Dorset) - 1 monitoring station
Horner Water England (Somerset) - 1 monitoring station
Horsbere Brook England (Gloucestershire) - 5 monitoring stations
Horsebridge Dyke England (Lancashire) - 1 monitoring station
Hovingham Beck England (North Yorkshire) - 1 monitoring station
Hughenden Stream England (Buckinghamshire) - 1 monitoring station
Huish Level Rhyne England (Somerset) - 1 monitoring station
River Hull England (East Riding of Yorkshire) - 6 monitoring stations
Huntingfield Watercourse England (Suffolk) - 1 monitoring station
River Hyndburn England (Lancashire) - 1 monitoring station
River Idle England (Nottinghamshire) - 2 monitoring stations
Ifield Brook England (West Sussex) - 1 monitoring station
Illey Brook England (West Midlands) - 1 monitoring station
Ingrebourne () - 1 monitoring station
River Ingrebourne England (Greater London) - 2 monitoring stations
Ings Beck England (West Yorkshire) - 2 monitoring stations
River Inny England (Cornwall) - 1 monitoring station
Inver Scotland (Sutherland) - 1 monitoring station
Inzion Scotland (Angus) - 1 monitoring station
Irfon Wales (Powys) - 2 monitoring stations
Irish Sea England (Cumbria) - 1 monitoring station
Irk () - 1 monitoring station
River Irk England (Greater Manchester) - 1 monitoring station
Irt () - 1 monitoring station
River Irt England (Cumbria) - 1 monitoring station
River Irthing England (Cumbria) - 1 monitoring station
Irvine Scotland (Ayrshire and Arran) - 4 monitoring stations
River Irwell England (Greater Manchester, Lancashire) - 9 monitoring stations
River Isbourne England (Worcestershire, Gloucestershire) - 3 monitoring stations
Ise () - 3 monitoring stations
River Ise England (Northamptonshire) - 3 monitoring stations
Isla (Deveron) Scotland (Banffshire) - 1 monitoring station
Isla (Tayside) Scotland (Angus, Perth and Kinross) - 2 monitoring stations
River Isle England (Somerset) - 3 monitoring stations
Itchen England (Hampshire) - 8 monitoring stations
River Itchen England (Warwickshire) - 1 monitoring station
Ithon Wales (Powys) - 2 monitoring stations
River Ivel England (Bedfordshire) - 2 monitoring stations
River Iwerne England (Dorset) - 1 monitoring station
Jed Water Scotland (Roxburgh, Ettrick and Lauderdale) - 2 monitoring stations
Jordan () - 2 monitoring stations
River Jordan England (Leicestershire) - 2 monitoring stations
Jubilee River England (Buckinghamshire, Berkshire) - 2 monitoring stations
Keekle () - 1 monitoring station
River Keekle England (Cumbria) - 1 monitoring station
Keer () - 1 monitoring station
River Keer England (Lancashire) - 1 monitoring station
Keithfield Burn Scotland (Aberdeenshire) - 1 monitoring station
Kelbrook Beck England (Lancashire) - 1 monitoring station
Kelvin Scotland (Dunbartonshire) - 3 monitoring stations
River Kenn Tributary England (Devon) - 1 monitoring station
Kennal () - 1 monitoring station
River Kennall England (Cornwall) - 1 monitoring station
Kennet () - 7 monitoring stations
River Kennet England (Wiltshire, Berkshire) - 6 monitoring stations
Kennett () - 2 monitoring stations
River Kennett England (Suffolk) - 2 monitoring stations
Kensey () - 1 monitoring station
River Kensey England (Cornwall) - 2 monitoring stations
Kent England (Cumbria) - 1 monitoring station
River Kent England (Cumbria) - 3 monitoring stations
Kenwater England (Herefordshire) - 1 monitoring station
Kenwith Stream England (Devon) - 1 monitoring station
River Kenwyn England (Cornwall) - 1 monitoring station
Kerry Scotland (Ross and Cromarty) - 1 monitoring station
Key () - 1 monitoring station
River Key England (Wiltshire) - 1 monitoring station
Keyingham Drain England (East Riding of Yorkshire) - 1 monitoring station
Kielder Burn England (Northumberland) - 1 monitoring station
Killhope Burn England (Durham) - 1 monitoring station
Kilmarnock Water Scotland (Ayrshire and Arran) - 1 monitoring station
Kilton Beck England (North Yorkshire) - 1 monitoring station
Kings Sedgemoor Drain England (Somerset) - 2 monitoring stations
Kingsbridge North Watercourse England (Devon) - 1 monitoring station
Kingsclere Brook England (Hampshire) - 1 monitoring station
Kinnel Water Scotland (Dumfries) - 2 monitoring stations
Kirk Beck England (Lancashire) - 1 monitoring station
Kirkton Burn Scotland (Stirling and Falkirk) - 1 monitoring station
Kirtle Water Scotland (Dumfries) - 1 monitoring station
Kittoch Water Scotland (Lanarkshire) - 1 monitoring station
Knoll Beck England (South Yorkshire) - 1 monitoring station
Knowle Stream England (Devon) - 1 monitoring station
Kyd Brook England (Greater London) - 6 monitoring stations
River Kyle England (North Yorkshire) - 1 monitoring station
River Kym England (Bedfordshire, Cambridgeshire) - 3 monitoring stations
Kyre Brook England (Worcestershire) - 2 monitoring stations
Laceby Beck England (Lincolnshire) - 2 monitoring stations
Ladybower Reservoir England (Derbyshire) - 1 monitoring station
Lake Bassenthwaite () - 1 monitoring station
Lake Ullswater () - 2 monitoring stations
Lake Windermere () - 1 monitoring station
Lambourn () - 1 monitoring station
River Lambourn England (Berkshire) - 3 monitoring stations
Lambrok Stream England (Wiltshire) - 1 monitoring station
Land Yeo England (Somerset) - 1 monitoring station
Landkey Brook England (Devon) - 1 monitoring station
Lands Beck England (West Yorkshire) - 1 monitoring station
Langford Brook England (Oxfordshire) - 1 monitoring station
Langford Brook (Bicester) () - 1 monitoring station
Lariggan River England (Cornwall) - 1 monitoring station
Lark () - 5 monitoring stations
River Lark England (Suffolk, Cambridgeshire) - 5 monitoring stations
Lavant () - 1 monitoring station
River Lavant England (West Sussex) - 2 monitoring stations
River Laver England (North Yorkshire) - 2 monitoring stations
Law Brook England (Surrey) - 1 monitoring station
Laxdale Scotland (Western Isles) - 1 monitoring station
Laxford Scotland (Sutherland) - 1 monitoring station
Leach () - 1 monitoring station
River Leach England (Gloucestershire) - 1 monitoring station
Leader Water Scotland (Roxburgh, Ettrick and Lauderdale) - 2 monitoring stations
River Leadon England (Herefordshire, Gloucestershire) - 2 monitoring stations
Leam () - 1 monitoring station
River Leam England (Warwickshire) - 2 monitoring stations
Ledwyche Brook England (Shropshire) - 1 monitoring station
Lee England (Hertfordshire, Greater London) - 3 monitoring stations
Lee (Lower) England (Greater London) - 1 monitoring station
Lee (Upper) England (Bedfordshire, Hertfordshire) - 3 monitoring stations
River Leen England (Nottinghamshire) - 2 monitoring stations
Leet Water Scotland (Berwickshire) - 1 monitoring station
Leigh Brook England (Gloucestershire) - 1 monitoring station
Leithen Water Scotland (Tweeddale) - 1 monitoring station
River Lemon England (Devon) - 5 monitoring stations
Leny Scotland (Stirling and Falkirk) - 1 monitoring station
Leri Wales (Dyfed) - 2 monitoring stations
Letcombe Brook England (Oxfordshire) - 3 monitoring stations
Leven (Fife) Scotland (Perth and Kinross) - 1 monitoring station
Leven (Loch Lomond) Scotland (Dunbartonshire) - 1 monitoring station
River Leven, Cumbria England (Cumbria) - 1 monitoring station
River Leven, Yorkshire England (North Yorkshire) - 6 monitoring stations
Levisham Beck England (North Yorkshire) - 1 monitoring station
River Lew England (Devon) - 1 monitoring station
Liddel Water Scotland (Roxburgh, Ettrick and Lauderdale, Dumfries) - 2 monitoring stations
Lilley Brook England (Gloucestershire) - 1 monitoring station
Lim () - 1 monitoring station
River Lim England (Devon) - 1 monitoring station
Limey Water England (Lancashire) - 1 monitoring station
River Lin England (Leicestershire) - 1 monitoring station
Lincoln Drainage Area () - 1 monitoring station
Ling Scotland (Ross and Cromarty) - 1 monitoring station
Linkwood Burn Scotland (Moray) - 0 monitoring station
Linne nam Beathach Scotland (Argyll and Bute) - 1 monitoring station
Little Avon River England (Gloucestershire) - 1 monitoring station
Little Caldew England (Cumbria) - 1 monitoring station
Little Dart () - 1 monitoring station
Little Dart River England (Devon) - 1 monitoring station
Little Ouse () - 4 monitoring stations
River Little Ouse England (Norfolk) - 3 monitoring stations
Little Salt Moor Rhyne () - 1 monitoring station
Little Saltmoor Rhyne () - 1 monitoring station
Little Stour England (Kent) - 1 monitoring station
Little Stour Trib Great Stour () - 1 monitoring station
Littlemead Brook England (Surrey) - 1 monitoring station
Litton Cheney Stream England (Dorset) - 1 monitoring station
Livet Scotland (Banffshire) - 1 monitoring station
Llanmaes Brook Wales (South Glamorgan) - 2 monitoring stations
Lledan Brook Wales (Powys) - 1 monitoring station
Lledr Wales (Clwyd) - 1 monitoring station
Lliedi Wales (Dyfed) - 2 monitoring stations
Lliw Wales (West Glamorgan) - 1 monitoring station
Llyfni Wales (Gwynedd) - 1 monitoring station
Llynfi Wales (Mid Glamorgan, Powys) - 4 monitoring stations
Loch A Bhraoin Scotland (Ross and Cromarty) - 1 monitoring station
Loch Ard Burn Scotland (Stirling and Falkirk) - 1 monitoring station
Loch Flemington Scotland (Inverness) - 1 monitoring station
Loch Fyne Scotland (Argyll and Bute) - 1 monitoring station
Loch Kinord Scotland (Aberdeenshire) - 1 monitoring station
Loch Linnhe Scotland (Inverness) - 2 monitoring stations
Loch Lomond Scotland (Dunbartonshire) - 1 monitoring station
Loch Maree Scotland (Ross and Cromarty) - 1 monitoring station
Loch Naver Scotland (Sutherland) - 1 monitoring station
Loch Ness Scotland (Inverness) - 1 monitoring station
Loch Oich Scotland (Inverness) - 1 monitoring station
Loch Ryan England (Wigtown) - 1 monitoring station
Loch Vaa Scotland (Inverness) - 1 monitoring station
Lochindorb Scotland (Inverness) - 1 monitoring station
Lochinvar Beck England (Cumbria) - 1 monitoring station
Lochinver Beck () - 1 monitoring station
Lochy (Argyll) Scotland (Argyll and Bute) - 1 monitoring station
Lochy (Lochaber) Scotland (Inverness) - 1 monitoring station
Lod () - 2 monitoring stations
River Lod England (West Sussex) - 2 monitoring stations
River Lodden England (Dorset) - 1 monitoring station
Loddon () - 7 monitoring stations
River Loddon England (Berkshire, Hampshire) - 7 monitoring stations
Loftus Beck England (North Yorkshire) - 1 monitoring station
Lonco Brook England (Staffordshire) - 1 monitoring station
Long Brook England (Devon) - 1 monitoring station
Longload Main Drain England (Somerset) - 1 monitoring station
Longwood Brook England (West Yorkshire) - 1 monitoring station
Lossie Scotland (Moray) - 2 monitoring stations
Lostock () - 2 monitoring stations
River Lostock England (Lancashire) - 2 monitoring stations
Loughor Wales (Dyfed) - 4 monitoring stations
Low Moor Beck England (West Yorkshire) - 1 monitoring station
Lowfield Drain England (Nottinghamshire) - 1 monitoring station
River Lowman England (Devon) - 1 monitoring station
River Lowther England (Cumbria) - 2 monitoring stations
River Lox England (West Sussex) - 1 monitoring station
Loxford Water England (Greater London) - 1 monitoring station
River Loxley England (South Yorkshire) - 2 monitoring stations
Lud () - 1 monitoring station
River Lud England (Lincolnshire) - 1 monitoring station
Lugar Water Scotland (Ayrshire and Arran) - 1 monitoring station
Lugg Wales (Powys) - 1 monitoring station
River Lugg England (Herefordshire) - 4 monitoring stations
Luggie Water Scotland (Lanarkshire, Dunbartonshire) - 2 monitoring stations
Lugton Water Scotland (Ayrshire and Arran) - 1 monitoring station
Lukely Brook England (Isle of Wight) - 2 monitoring stations
Lunan Burn Scotland (Perth and Kinross) - 1 monitoring station
Lunan Water Scotland (Angus) - 1 monitoring station
Lune () - 5 monitoring stations
River Lune England (Lancashire, Cumbria) - 5 monitoring stations
Lune And Wyre England (Lancashire) - 1 monitoring station
Luss Water Scotland (Dunbartonshire) - 1 monitoring station
Lustrum Beck England (Durham) - 1 monitoring station
Luther Water Scotland (Kincardineshire) - 1 monitoring station
Lwyd Wales (Gwent) - 2 monitoring stations
River Lyd, Devon England (Devon) - 1 monitoring station
River Lyd, Gloucestershire England (Gloucestershire) - 2 monitoring stations
Lyme Brook England (Staffordshire) - 1 monitoring station
Lymington England (Hampshire) - 4 monitoring stations
River Lymn England (Lincolnshire) - 1 monitoring station
Lymn & Steeping () - 1 monitoring station
Lyne () - 1 monitoring station
River Lyne England (Cumbria) - 1 monitoring station
Lyne Water Scotland (Tweeddale) - 1 monitoring station
River Lynher England (Cornwall) - 1 monitoring station
Lyon Scotland (Perth and Kinross) - 3 monitoring stations
Machrie Water Scotland (Ayrshire and Arran) - 1 monitoring station
Maidenhead Ditch England (Berkshire) - 1 monitoring station
Manacan River England (Cornwall) - 1 monitoring station
Mangerton Brook England (Dorset) - 1 monitoring station
River Manifold England (Staffordshire) - 1 monitoring station
Manor Water Scotland (Tweeddale) - 1 monitoring station
Marchington Brook England (Staffordshire) - 1 monitoring station
River Marden England (Wiltshire) - 2 monitoring stations
River Mardle England (Devon) - 1 monitoring station
Marias Wales (Dyfed) - 1 monitoring station
Markeaton Brook England (Derbyshire) - 1 monitoring station
Market Weighton Canal England (East Riding of Yorkshire) - 1 monitoring station
Marsh Water England (Somerset) - 1 monitoring station
Marston Meysey Brook England (Gloucestershire) - 1 monitoring station
Marton West Beck England (North Yorkshire) - 2 monitoring stations
Maud Foster/Stonebridge Drain England (Lincolnshire) - 1 monitoring station
River Maun England (Nottinghamshire) - 3 monitoring stations
Mawddach Wales (Gwynedd) - 1 monitoring station
Meadlake Ditch England (Surrey) - 1 monitoring station
Meanwood Beck England (West Yorkshire) - 1 monitoring station
Mearley Brook England (Lancashire) - 1 monitoring station
River Mease England (Derbyshire) - 1 monitoring station
Medbourne Brook England (Leicestershire) - 2 monitoring stations
River Meden England (Nottinghamshire) - 2 monitoring stations
Medina () - 3 monitoring stations
River Medina England (Isle of Wight) - 2 monitoring stations
Medlock () - 2 monitoring stations
River Medlock England (Greater Manchester) - 2 monitoring stations
Medway England (Kent, East Sussex, Surrey) - 13 monitoring stations
Meece Brook England (Staffordshire) - 1 monitoring station
Meers Brook England (South Yorkshire) - 1 monitoring station
River Meese England (Shropshire) - 1 monitoring station
Meig Scotland (Ross and Cromarty) - 1 monitoring station
Mein Water Scotland (Dumfries) - 1 monitoring station
Mells River England (Somerset) - 2 monitoring stations
Mellte Wales (Powys) - 1 monitoring station
Melton Brook England (Leicestershire) - 1 monitoring station
River Meon England (Hampshire) - 6 monitoring stations
Merlin's Brook England, Wales (Leicestershire, Dyfed) - 2 monitoring stations
Merrow Common Stream England (Surrey) - 1 monitoring station
Mersey England (Greater Manchester, Cheshire) - 6 monitoring stations
Mevagissey Stream England (Cornwall) - 1 monitoring station
Mickley Dyke England (East Riding of Yorkshire) - 1 monitoring station
Midford Brook England (Somerset) - 1 monitoring station
Mill Beck England (North Yorkshire) - 1 monitoring station
Mill Bourne England (Surrey) - 1 monitoring station
Mill Brook England (Oxfordshire) - 1 monitoring station
Mill Burn Scotland (Inverness) - 1 monitoring station
Mimmshall Brook England (Hertfordshire) - 2 monitoring stations
Mimram () - 3 monitoring stations
River Mimram England (Hertfordshire) - 3 monitoring stations
Mint () - 1 monitoring station
River Mint England (Cumbria) - 1 monitoring station
Mires Beck England (East Riding of Yorkshire) - 1 monitoring station
Misbourne () - 2 monitoring stations
River Misbourne England (Buckinghamshire) - 2 monitoring stations
Mole England (Surrey, West Sussex) - 8 monitoring stations
River Mole England (Devon) - 3 monitoring stations
Monachyle Scotland (Stirling and Falkirk) - 1 monitoring station
Monk Dyke England (East Riding of Yorkshire) - 1 monitoring station
Monks Brook England (Hampshire) - 2 monitoring stations
Monksilver Stream England (Somerset) - 1 monitoring station
Monkton Mead () - 2 monitoring stations
Monktonmead Brook England (Isle of Wight) - 2 monitoring stations
Monnow Wales (Gwent) - 3 monitoring stations
Moors Burn England (Tyne & Wear) - 1 monitoring station
Moors River England (Dorset) - 1 monitoring station
Moray Firth Scotland (Banffshire, Moray) - 2 monitoring stations
Morfa Brook Wales (Mid Glamorgan) - 1 monitoring station
Moriston Scotland (Inverness) - 1 monitoring station
Mosset Burn Scotland (Moray) - 1 monitoring station
Motcombe Stream England (Dorset) - 1 monitoring station
Motray Water Scotland (Fife) - 1 monitoring station
Muckle Burn Scotland (Moray) - 1 monitoring station
Muick Scotland (Aberdeenshire) - 1 monitoring station
Murray Burn Scotland (City of Edinburgh) - 1 monitoring station
Mutton Brook England (Greater London) - 1 monitoring station
River Nadder England (Wiltshire) - 2 monitoring stations
Nail Bourne Tributary Little Stour () - 1 monitoring station
Nailbourne England (Kent) - 2 monitoring stations
Nailsworth Stream England (Gloucestershire) - 1 monitoring station
Nairn Scotland (Inverness, Nairn) - 2 monitoring stations
Nant Y Fendrod Wales (West Glamorgan) - 1 monitoring station
Nar England (Norfolk) - 2 monitoring stations
Naver Scotland (Sutherland) - 1 monitoring station
Nazeing Brook England (Essex) - 1 monitoring station
Neath Wales (West Glamorgan) - 3 monitoring stations
River Neet England (Cornwall) - 2 monitoring stations
Nene England (Northamptonshire) - 2 monitoring stations
Nene (N'hampton-Wollaston) England (Northamptonshire) - 2 monitoring stations
Nene (Orton - Wash) England (Cambridgeshire) - 2 monitoring stations
Nene (Wollaston-Wansford) England (Northamptonshire, Cambridgeshire, Leicestershire) - 4 monitoring stations
Nene - Brampton Branch England (Northamptonshire) - 4 monitoring stations
Nene - Whitton Branch England (Northamptonshire) - 1 monitoring station
Ness Scotland (Inverness) - 1 monitoring station
Nethan Scotland (Lanarkshire) - 1 monitoring station
Netherley Brook England (Merseyside) - 1 monitoring station
Nettleham Beck England (Lincolnshire) - 1 monitoring station
Nevis Scotland (Inverness) - 1 monitoring station
New Cut () - 1 monitoring station
New Mill Dike England (West Yorkshire) - 1 monitoring station
Newhall Burn Scotland (Ross and Cromarty) - 1 monitoring station
Newlyn Coombe River England (Cornwall) - 1 monitoring station
River Nidd England (North Yorkshire) - 6 monitoring stations
Nith Scotland (Dumfries, Ayrshire and Arran) - 6 monitoring stations
Norbury Brk () - 1 monitoring station
Norbury Brook England (Greater London) - 1 monitoring station
Norfolk Coast England (Norfolk) - 1 monitoring station
North Calder Water Scotland (Lanarkshire) - 1 monitoring station
North Cornwall Coast England (Cornwall) - 3 monitoring stations
North Devon Coast England (Devon) - 0 monitoring station
North Drain England (Somerset) - 1 monitoring station
North Esk (Lothian) Scotland (Midlothian) - 1 monitoring station
North Esk (Tayside) Scotland (Kincardineshire) - 2 monitoring stations
River North Lew England (Devon) - 1 monitoring station
North Norfolk Coast England (Norfolk) - 1 monitoring station
North Queich Scotland (Perth and Kinross) - 1 monitoring station
North Sea England, Scotland (East Riding of Yorkshire, Orkney, Northumberland, Angus, Berwickshire) - 4 monitoring stations
North Somerset Coast England (Somerset) - 1 monitoring station
River North Tyne England (Northumberland) - 6 monitoring stations
North Winterbourne () - 1 monitoring station
Northbrook England (Devon) - 1 monitoring station
Northmoor Main Drain England (Somerset) - 2 monitoring stations
Not Available () - 1 monitoring station
Nunney Brook England (Somerset) - 1 monitoring station
Oakenshaw Beck England (West Yorkshire) - 1 monitoring station
Oakington Brook England (Cambridgeshire) - 1 monitoring station
Oakley Cross Beck England (Durham) - 1 monitoring station
Ock () - 4 monitoring stations
River Ock England (Oxfordshire) - 3 monitoring stations
Og () - 1 monitoring station
River Og England (Wiltshire) - 1 monitoring station
Ogden Brook England (Lancashire) - 1 monitoring station
Ogmore Wales (Mid Glamorgan) - 3 monitoring stations
Ogwr Fawr Wales (Mid Glamorgan) - 1 monitoring station
Oil Mill Beck England (West Yorkshire) - 1 monitoring station
River Okement England (Devon) - 1 monitoring station
Old Mill Stream England (Kent) - 1 monitoring station
Old Mill Stream Tributary East Stour () - 1 monitoring station
Old River Brock England (Lancashire) - 1 monitoring station
Old River Tone England (Somerset) - 1 monitoring station
Oldbury Naite Rhyne England (Gloucestershire) - 1 monitoring station
Oldbury Tidal Naite Rhyne England (Gloucestershire) - 1 monitoring station
Olway Brook Wales (Gwent) - 1 monitoring station
River Onny England (Shropshire) - 1 monitoring station
Orchy Scotland (Argyll and Bute) - 1 monitoring station
Ordie Burn Scotland (Perth and Kinross) - 1 monitoring station
Ore Scotland (Fife) - 1 monitoring station
River Ore England (Suffolk) - 1 monitoring station
Ormesby Beck England (North Yorkshire) - 1 monitoring station
River Otter England (Devon) - 2 monitoring stations
Otterton Brook England (Devon) - 1 monitoring station
River Ottery England (Cornwall) - 3 monitoring stations
Oulton Beck England (West Yorkshire) - 1 monitoring station
River Ouse England (North Yorkshire, East Sussex, West Sussex, East Riding of Yorkshire) - 19 monitoring stations
Ouse Burn England (Tyne & Wear) - 3 monitoring stations
Ouse Dyke England (Nottinghamshire) - 1 monitoring station
Ouse [So] () - 7 monitoring stations
River Ouzel England (Buckinghamshire, Bedfordshire) - 4 monitoring stations
Oxlease Drain England (Hampshire) - 1 monitoring station
Oxton Dumble England (Nottinghamshire) - 1 monitoring station
Oykel Scotland (Sutherland) - 3 monitoring stations
Pang () - 4 monitoring stations
River Pang England (Berkshire) - 4 monitoring stations
River Pant England (Essex) - 1 monitoring station
Par River England (Cornwall) - 2 monitoring stations
Parham Beck England (Cumbria) - 1 monitoring station
River Parrett England (Somerset) - 5 monitoring stations
River Parrett (Tidal) () - 2 monitoring stations
Peakshole Water England (Derbyshire) - 1 monitoring station
Pearl Brook England (Greater Manchester) - 1 monitoring station
Peffer Burn (West) Scotland (East Lothian) - 1 monitoring station
Peffery Scotland (Ross and Cromarty) - 1 monitoring station
Penberth Stream England (Cornwall) - 1 monitoring station
Pendle Water England (Lancashire) - 3 monitoring stations
River Penk England (Staffordshire) - 2 monitoring stations
Pent Stream England (Kent) - 1 monitoring station
Pentre Brook England (Shropshire) - 1 monitoring station
Peris Wales (Gwynedd) - 1 monitoring station
Perrancombe Stream England (Cornwall) - 2 monitoring stations
River Perry England (Shropshire) - 1 monitoring station
Petersfield Stream England (Hampshire) - 2 monitoring stations
Petham Bourne England (Kent) - 1 monitoring station
Petteril () - 2 monitoring stations
River Petteril England (Cumbria) - 4 monitoring stations
Petty's Brook England (Hampshire) - 1 monitoring station
Pickering Beck England (North Yorkshire) - 4 monitoring stations
Picknall Brook England (Staffordshire) - 1 monitoring station
River Piddle England (Dorset) - 3 monitoring stations
Piddle Brook England (Worcestershire) - 1 monitoring station
Pillhill Brook England (Hampshire) - 1 monitoring station
Piltanton Burn Scotland (Wigtown) - 1 monitoring station
Pimlico Brook England (Lancashire) - 1 monitoring station
Pincey Brook England (Essex) - 1 monitoring station
Pinn () - 9 monitoring stations
River Pinn England (Greater London) - 9 monitoring stations
Pishiobury Brook England (Hertfordshire) - 1 monitoring station
River Plym England (Devon) - 1 monitoring station
Poaka Beck England (Cumbria) - 2 monitoring stations
Pocklington Beck England (East Riding of Yorkshire) - 1 monitoring station
Pointon Lode England (Lincolnshire) - 1 monitoring station
River Pol England (Cornwall) - 1 monitoring station
Pol River () - 1 monitoring station
Ponsandane Stream England (Cornwall) - 1 monitoring station
River Pont England (Northumberland) - 2 monitoring stations
River Pool England (Greater London) - 1 monitoring station
Pool River () - 1 monitoring station
Porter Brook England (South Yorkshire) - 2 monitoring stations
Portreath Stream England (Cornwall) - 1 monitoring station
River Poulter England (Nottinghamshire) - 1 monitoring station
Poyle Channel England (Berkshire) - 1 monitoring station
Poynton Brook England (Cheshire) - 1 monitoring station
Praze Stream England (Cornwall) - 1 monitoring station
Priorpot Beck England (North Yorkshire) - 1 monitoring station
Prosen Water Scotland (Angus) - 1 monitoring station
Pudding Brook England (Shropshire) - 1 monitoring station
Pyl Brook England (Greater London) - 3 monitoring stations
Pymmes Brook England (Greater London) - 3 monitoring stations
Quaggy () - 2 monitoring stations
River Quaggy England (Greater London) - 2 monitoring stations
Quin () - 1 monitoring station
River Quin England (Hertfordshire) - 1 monitoring station
Quy Water England (Cambridgeshire) - 1 monitoring station
Radlett Brook England (Hertfordshire) - 1 monitoring station
Radley Park Ditch England (Oxfordshire) - 1 monitoring station
Rags Brook England (Hertfordshire) - 1 monitoring station
Rase () - 1 monitoring station
River Rase England (Lincolnshire) - 2 monitoring stations
Rattlesden River England (Suffolk) - 2 monitoring stations
Ravensbourne () - 7 monitoring stations
River Ravensbourne England (Greater London) - 7 monitoring stations
Rawthey () - 1 monitoring station
River Rawthey England (Cumbria) - 1 monitoring station
Ray (Wilts) England (Wiltshire) - 3 monitoring stations
Ray(Oxon) England (Buckinghamshire, Oxfordshire) - 2 monitoring stations
River Rea England (West Midlands) - 2 monitoring stations
River Rea (Teme) England (Worcestershire) - 1 monitoring station
Rea Brook England (Shropshire) - 2 monitoring stations
Rearsby Brook England (Leicestershire) - 1 monitoring station
River Red England (Hertfordshire) - 1 monitoring station
Red Burn England (Northumberland) - 1 monitoring station
Red River, Cornwall England (Cornwall) - 1 monitoring station
River Rede England (Northumberland) - 3 monitoring stations
Redhill Brook England (Surrey) - 1 monitoring station
Reservoir England (North Yorkshire) - 1 monitoring station
RHB Trib River Kenn () - 1 monitoring station
River Rhee England (Cambridgeshire) - 3 monitoring stations
Rheidol Wales (Dyfed) - 3 monitoring stations
Rhondda Wales (Mid Glamorgan) - 3 monitoring stations
Rhondda Fach Wales (Mid Glamorgan) - 1 monitoring station
Rhymney Wales (Gwent, South Glamorgan) - 4 monitoring stations
Rib () - 2 monitoring stations
River Rib England (Hertfordshire) - 2 monitoring stations
Ribble () - 9 monitoring stations
River Ribble England (Lancashire, North Yorkshire) - 10 monitoring stations
River Riccal England (North Yorkshire) - 1 monitoring station
Ridings Brook England (Staffordshire) - 1 monitoring station
Ripple Brook England (Gloucestershire) - 0 monitoring station
Rising Brook England (Staffordshire) - 1 monitoring station
Ritec Wales (Dyfed) - 1 monitoring station
Roall Dyke England (North Yorkshire) - 1 monitoring station
Roam Drain England (East Riding of Yorkshire) - 1 monitoring station
River Roch England (Greater Manchester) - 4 monitoring stations
River Roden England (Shropshire) - 1 monitoring station
Roding () - 5 monitoring stations
River Roding England (Essex, Greater London) - 5 monitoring stations
Roe Beck England (Cumbria) - 1 monitoring station
Rolleston Brook England (Staffordshire) - 1 monitoring station
River Rom England (Greater London) - 2 monitoring stations
Rom/Beam () - 1 monitoring station
Rookhope Burn England (Durham) - 1 monitoring station
River Rothay England (Cumbria) - 1 monitoring station
Rother (East Sussex) () - 1 monitoring station
Rother (West Sussex) England (West Sussex, Hampshire) - 3 monitoring stations
Rother Washlands England (South Yorkshire) - 1 monitoring station
River Rother, Kent England (East Sussex) - 3 monitoring stations
River Rother, Yorkshire England (South Yorkshire, Derbyshire) - 10 monitoring stations
Rothley Brook England (Leicestershire) - 2 monitoring stations
Rotten Calder Water Scotland (Lanarkshire) - 1 monitoring station
Royal Military Canal England (East Sussex) - 1 monitoring station
Royal Military Canal Outflow Sea () - 1 monitoring station
Ruchill Water Scotland (Perth and Kinross) - 1 monitoring station
Rudhall Brook England (Herefordshire) - 1 monitoring station
Ruskington Beck England (Lincolnshire) - 1 monitoring station
Ruthven Water Scotland (Perth and Kinross) - 1 monitoring station
River Ryburn England (West Yorkshire) - 2 monitoring stations
Ryburn () - 1 monitoring station
River Rye England (North Yorkshire) - 3 monitoring stations
Rye Meads Effluent Channel England (Hertfordshire) - 1 monitoring station
River Ryton England (Nottinghamshire) - 2 monitoring stations
Sabden Brook England (Lancashire) - 1 monitoring station
Salfords Stream England (Surrey) - 1 monitoring station
Salmon Brook England (Greater London) - 2 monitoring stations
Salt Haven England (East Sussex) - 1 monitoring station
Saltmoor Main Drain England (Somerset) - 1 monitoring station
River Salwarpe England (Worcestershire) - 3 monitoring stations
Sampford Brett Stream England (Somerset) - 1 monitoring station
Sandon Brook England (Essex) - 1 monitoring station
Sandy Brook England (Lancashire) - 1 monitoring station
Sandyford Brook England (Staffordshire) - 1 monitoring station
Sankey Brook England (Cheshire) - 3 monitoring stations
Saredon Brook England (Staffordshire) - 1 monitoring station
Savoch Burn Scotland (Aberdeenshire) - 1 monitoring station
Sawdde Wales (Dyfed) - 1 monitoring station
Scar Water Scotland (Dumfries) - 1 monitoring station
Scurf Dyke England (East Riding of Yorkshire) - 1 monitoring station
Sea () - 2 monitoring stations
River Sea Cut () - 1 monitoring station
Sea Cut England (North Yorkshire) - 3 monitoring stations
Seacourt Stream England (Oxfordshire) - 1 monitoring station
River Seaton England (Cornwall) - 1 monitoring station
Seiont Wales (Gwynedd) - 1 monitoring station
Selby Dam England (North Yorkshire) - 1 monitoring station
Semington Brook England (Wiltshire) - 1 monitoring station
River Sence England (Leicestershire) - 1 monitoring station
River Sence (Soar) England (Leicestershire) - 2 monitoring stations
Senni Wales (Powys) - 1 monitoring station
Setting Dyke England (East Riding of Yorkshire) - 1 monitoring station
River Seven England (North Yorkshire) - 2 monitoring stations
River Severn England (Gloucestershire, Shropshire, Worcestershire) - 21 monitoring stations
Severn Wales (Powys) - 8 monitoring stations
River Shalbourne England (Berkshire) - 1 monitoring station
Shaw Brook Tributary England (Lancashire) - 1 monitoring station
River Sheaf England (South Yorkshire) - 3 monitoring stations
Shell Brook England (West Sussex) - 1 monitoring station
River Sheppey England (Somerset) - 2 monitoring stations
River Sherbourne England (West Midlands) - 3 monitoring stations
Sherston Avon England (Wiltshire) - 2 monitoring stations
Shiel Scotland (Inverness) - 1 monitoring station
Shill Brook England (Oxfordshire) - 1 monitoring station
Shin Scotland (Sutherland) - 1 monitoring station
Shreen Water England (Dorset) - 2 monitoring stations
Shutterton Brook England (Devon) - 1 monitoring station
Shuttle Tributary Cray England (Greater London) - 1 monitoring station
River Sid England (Devon) - 2 monitoring stations
Sileby Brook England (Leicestershire) - 1 monitoring station
Silk Stream England (Greater London) - 2 monitoring stations
Silsden Beck England (West Yorkshire) - 1 monitoring station
Sincil Dyke England (Lincolnshire) - 1 monitoring station
Sinderland Brk () - 1 monitoring station
Sinderland Brook England (Greater Manchester) - 1 monitoring station
Sirhowy Wales (Gwent) - 2 monitoring stations
Skeffling Drain England (East Riding of Yorkshire) - 1 monitoring station
River Skell England (North Yorkshire) - 1 monitoring station
River Skerne England (Durham) - 4 monitoring stations
River Skirfare England (North Yorkshire) - 1 monitoring station
Skirting Beck England (Cumbria) - 1 monitoring station
Slad Brook England (Gloucestershire) - 1 monitoring station
Slea () - 3 monitoring stations
River Slea England (Lincolnshire) - 3 monitoring stations
Slitrig Scotland (Roxburgh, Ettrick and Lauderdale) - 1 monitoring station
Small River Lee England (Hertfordshire, Greater London) - 2 monitoring stations
Smallhope Burn England (Durham) - 1 monitoring station
Smestow Brook England (Staffordshire, West Midlands) - 2 monitoring stations
River Smite England (Nottinghamshire) - 1 monitoring station
Snail () - 1 monitoring station
River Snail England (Cambridgeshire) - 1 monitoring station
Snaith Ings England (East Riding of Yorkshire) - 1 monitoring station
Snaizeholme Beck England (North Yorkshire) - 1 monitoring station
Snizort Scotland (Ross and Cromarty) - 1 monitoring station
River Soar England (Leicestershire) - 5 monitoring stations
Solfach Wales (Dyfed) - 2 monitoring stations
Solway Firth Scotland (The Stewartry of Kirkcudbright) - 1 monitoring station
Somborne Stream England (Hampshire) - 1 monitoring station
Somerset Frome England (Somerset, Wiltshire) - 3 monitoring stations
Sor Brook England (Oxfordshire) - 1 monitoring station
Sound of Barra Scotland (Western Isles) - 1 monitoring station
Sound of Harris Scotland (Western Isles) - 1 monitoring station
Sour Beck England (North Yorkshire) - 1 monitoring station
South Brook England (Wiltshire) - 1 monitoring station
South Cave Beck England (East Riding of Yorkshire) - 1 monitoring station
South Cornwall Coast England (Cornwall) - 1 monitoring station
South Devon Coast England (Devon) - 1 monitoring station
South Esk (Angus) Scotland (Angus) - 3 monitoring stations
South Esk (Lothian) Scotland (Midlothian) - 1 monitoring station
South Forty Foot () - 4 monitoring stations
South Forty Foot Drain England (Lincolnshire) - 4 monitoring stations
South Queich Scotland (Perth and Kinross) - 1 monitoring station
River South Tyne England (Northumberland, Cumbria) - 5 monitoring stations
Southcourt Brook England (Buckinghamshire) - 1 monitoring station
Southwick Burn Scotland (The Stewartry of Kirkcudbright) - 1 monitoring station
River Sow England (Staffordshire) - 3 monitoring stations
River Sowe England (West Midlands) - 2 monitoring stations
Sowy () - 1 monitoring station
River Sowy England (Somerset) - 1 monitoring station
Spadesbourne Brook England (Worcestershire) - 2 monitoring stations
Spen Beck England (West Yorkshire) - 2 monitoring stations
Spey Scotland (Inverness, Banffshire) - 8 monitoring stations
Spodden England (Lancashire) - 1 monitoring station
Spratford Stream England (Devon) - 1 monitoring station
Spring Brk () - 1 monitoring station
Spring Brook England (Greater London) - 1 monitoring station
Sprint () - 1 monitoring station
River Sprint England (Cumbria) - 1 monitoring station
St Austell River England (Cornwall) - 2 monitoring stations
St Blazey Stream England (Cornwall) - 1 monitoring station
St James Stream England (Greater London) - 1 monitoring station
St Johns Beck England (Cumbria) - 1 monitoring station
St Neot River England (Cornwall) - 1 monitoring station
Stainfield Beck England (Lincolnshire) - 1 monitoring station
Stansted Brook England (Essex) - 1 monitoring station
River Steeping England (Lincolnshire) - 1 monitoring station
River Stennack England (Cornwall) - 1 monitoring station
Stert () - 1 monitoring station
River Stert England (Oxfordshire) - 1 monitoring station
Stevenage Brook England (Hertfordshire) - 1 monitoring station
River Stiffkey England (Norfolk) - 2 monitoring stations
Stinchar Scotland (Ayrshire and Arran) - 1 monitoring station
Stock Beck England (Cumbria) - 3 monitoring stations
Stock Ghyll England (Cumbria) - 1 monitoring station
Stocksfield Burn England (Northumberland) - 1 monitoring station
Stone Creek Clough () - 1 monitoring station
Stonham Watercourse England (Suffolk) - 1 monitoring station
Stort () - 5 monitoring stations
River Stort England (Essex, Hertfordshire) - 5 monitoring stations
River Stour (Warks) England (Warwickshire) - 1 monitoring station
River Stour (Worcs) England (Worcestershire) - 1 monitoring station
Stour Brook England (Essex) - 1 monitoring station
River Stour, Dorset England (Dorset) - 7 monitoring stations
River Stour, Essex England (Suffolk, Essex) - 5 monitoring stations
River Stour, Worcestershire England (West Midlands, Worcestershire, Staffordshire) - 3 monitoring stations
Strae Scotland (Argyll and Bute) - 1 monitoring station
River Strat England (Cornwall) - 1 monitoring station
Strathmore Scotland (Sutherland) - 1 monitoring station
Strathy Scotland (Sutherland) - 1 monitoring station
River Strine England (Shropshire) - 1 monitoring station
Strontian Scotland (Inverness) - 1 monitoring station
Sud Brook England (Gloucestershire) - 2 monitoring stations
Suffolk Coast England (Suffolk) - 3 monitoring stations
Sulham Brook England (Berkshire) - 1 monitoring station
Sutton Beck England (North Yorkshire) - 1 monitoring station
River Swale England (North Yorkshire) - 7 monitoring stations
Swalecliffe Brook England (Kent) - 1 monitoring station
Swan Brook England (Dorset) - 2 monitoring stations
River Swarbourne England (Staffordshire) - 1 monitoring station
Swavesey Drain England (Cambridgeshire) - 1 monitoring station
River Swift England (Warwickshire) - 1 monitoring station
River Swilgate England (Gloucestershire) - 1 monitoring station
Swill Brook England (Wiltshire) - 1 monitoring station
Swinney Beck England (North Yorkshire) - 1 monitoring station
Syd Brook England (Lancashire) - 1 monitoring station
Sydling Water England (Dorset) - 1 monitoring station
Tadburn Lake England (Hampshire) - 1 monitoring station
Taf Wales (Dyfed) - 3 monitoring stations
Taf Fawr Wales (Mid Glamorgan) - 1 monitoring station
Taf Fechan Wales (Mid Glamorgan) - 1 monitoring station
Taff Wales (Mid Glamorgan, South Glamorgan) - 6 monitoring stations
River Tale England (Devon) - 1 monitoring station
River Tamar England (Devon, Cornwall) - 6 monitoring stations
River Tame England (West Midlands, Warwickshire, Staffordshire) - 9 monitoring stations
Tame England (Greater Manchester) - 5 monitoring stations
River Tanat England (Shropshire) - 1 monitoring station
Tang Hall Beck England (North Yorkshire) - 1 monitoring station
Tanners Brook England (Hampshire) - 2 monitoring stations
Tarff Scotland (Inverness) - 1 monitoring station
Tarland Burn Scotland (Aberdeenshire) - 1 monitoring station
River Tavy England (Devon) - 3 monitoring stations
Tavy () - 1 monitoring station
River Taw England (Devon) - 5 monitoring stations
Tawe Wales (Powys, West Glamorgan) - 5 monitoring stations
Tay Scotland (Perth and Kinross) - 5 monitoring stations
River Team England (Durham, Tyne & Wear) - 2 monitoring stations
River Tean England (Staffordshire) - 2 monitoring stations
River Tees England (Durham, North Yorkshire) - 8 monitoring stations
Teifi Wales (Dyfed) - 5 monitoring stations
River Teign England (Devon) - 3 monitoring stations
Teise () - 3 monitoring stations
River Teise England (Kent, East Sussex) - 3 monitoring stations
Teith Scotland (Stirling and Falkirk) - 2 monitoring stations
River Teme England, Wales (Worcestershire, Shropshire, Herefordshire, Powys) - 8 monitoring stations
River Tern England (Shropshire) - 1 monitoring station
Test () - 1 monitoring station
River Test England (Hampshire) - 11 monitoring stations
Tetbury Avon England (Wiltshire) - 1 monitoring station
Teviot Scotland (Roxburgh, Ettrick and Lauderdale) - 3 monitoring stations
Thacka Beck England (Cumbria) - 3 monitoring stations
River Tham England (Lincolnshire) - 2 monitoring stations
Thame () - 7 monitoring stations
River Thame England (Buckinghamshire, Oxfordshire) - 7 monitoring stations
Thames England (Oxfordshire, Berkshire, Surrey, Gloucestershire, Greater London, Buckinghamshire, Wiltshire) - 55 monitoring stations
Thames Tideway England (Greater London, Essex) - 8 monitoring stations
Thaw Wales (South Glamorgan) - 2 monitoring stations
The Beck England (Greater London) - 1 monitoring station
The Cut England (Berkshire) - 3 monitoring stations
The Fleet England (North Yorkshire) - 1 monitoring station
The Gissage England (Devon) - 1 monitoring station
The Moss England (Derbyshire) - 1 monitoring station
The Porter River England (South Yorkshire) - 1 monitoring station
The Roxbourne England (Greater London) - 1 monitoring station
The Sluice England (Lancashire) - 1 monitoring station
The Yarl England (Cumbria) - 1 monitoring station
Theobalds Brook England (Hertfordshire) - 1 monitoring station
Thet () - 3 monitoring stations
River Thet England (Norfolk) - 4 monitoring stations
Thirlmere Reservoir England (Cumbria) - 1 monitoring station
Thorngumbald Drain England (East Riding of Yorkshire) - 1 monitoring station
Thornton Beck England (North Yorkshire) - 1 monitoring station
Thorpe Astley Brook England (Leicestershire) - 1 monitoring station
River Thrushel England (Devon) - 2 monitoring stations
River Thurne England (Norfolk) - 2 monitoring stations
Thurso Scotland (Caithness) - 1 monitoring station
Tidal River Waveney () - 2 monitoring stations
River Tiddy England (Cornwall) - 1 monitoring station
River Till, Essex England (Lincolnshire) - 1 monitoring station
River Till, Northumberland England (Northumberland) - 1 monitoring station
Tillingbourne () - 1 monitoring station
River Tillingbourne England (Surrey) - 1 monitoring station
Tilt Scotland (Perth and Kinross) - 1 monitoring station
Tima Water Scotland (Roxburgh, Ettrick and Lauderdale) - 1 monitoring station
River Tone England (Somerset) - 5 monitoring stations
Tormasad Scotland (Western Isles) - 1 monitoring station
River Torridge England (Devon) - 4 monitoring stations
Tory Brook England (Devon) - 1 monitoring station
Tottle Brook England (Nottinghamshire) - 1 monitoring station
River Tove England (Northamptonshire) - 2 monitoring stations
Trawden Brook England (Lancashire) - 1 monitoring station
Treffry Canal England (Cornwall) - 1 monitoring station
River Trent England (Nottinghamshire, Staffordshire, Lincolnshire, Derbyshire, Leicestershire) - 17 monitoring stations
Tresillian River England (Cornwall) - 1 monitoring station
Tromie Scotland (Inverness) - 1 monitoring station
Trothy Wales (Gwent) - 1 monitoring station
Trout Beck England (Cumbria) - 3 monitoring stations
River Trym England (Somerset) - 1 monitoring station
Tryweryn Wales (Gwynedd) - 1 monitoring station
River Tud England (Norfolk) - 1 monitoring station
Tummel Scotland (Perth and Kinross) - 1 monitoring station
Turkey Brook England (Greater London) - 1 monitoring station
River Tutt England (North Yorkshire) - 1 monitoring station
Tweed Scotland, England (Tweeddale, Roxburgh, Ettrick and Lauderdale, Northumberland) - 6 monitoring stations
River Tweed England, Scotland (Northumberland, Roxburgh, Ettrick and Lauderdale) - 3 monitoring stations
Twin England (Buckinghamshire) - 1 monitoring station
Twrch, Camarthen Wales (Dyfed) - 1 monitoring station
Twrch, Swansea Bay Wales (West Glamorgan) - 1 monitoring station
Twyver () - 4 monitoring stations
River Twyver England (Gloucestershire) - 4 monitoring stations
River Tyne England (Northumberland) - 5 monitoring stations
Tyne Scotland (East Lothian) - 3 monitoring stations
Tyweli Wales (Dyfed) - 1 monitoring station
Tywi Wales (Dyfed) - 7 monitoring stations
Uck () - 3 monitoring stations
River Uck England (East Sussex) - 3 monitoring stations
Uddens Water England (Dorset) - 1 monitoring station
Ugie Scotland (Aberdeenshire) - 1 monitoring station
Ullapool Scotland (Ross and Cromarty) - 1 monitoring station
Ulley Brook England (South Yorkshire) - 1 monitoring station
Ullswater England (Cumbria) - 2 monitoring stations
River Umber England (Devon) - 1 monitoring station
Umborne Brook England (Devon) - 1 monitoring station
Unnamed trib of Nairn Scotland (Nairn) - 1 monitoring station
Upper Clydach Wales (West Glamorgan) - 1 monitoring station
Upper Witham () - 1 monitoring station
River Ure England (North Yorkshire) - 7 monitoring stations
Urie Scotland (Aberdeenshire) - 1 monitoring station
Urr Water Scotland (The Stewartry of Kirkcudbright) - 1 monitoring station
Usk Wales (Powys, Gwent) - 9 monitoring stations
River Usway Burn () - 1 monitoring station
Usway Burn England (Northumberland) - 1 monitoring station
River Valency England (Cornwall) - 1 monitoring station
Valley Brook England (Cheshire) - 1 monitoring station
Ver () - 3 monitoring stations
River Ver England (Hertfordshire) - 3 monitoring stations
Vyrnwy Wales (Powys) - 4 monitoring stations
Waithe Beck England (Lincolnshire) - 1 monitoring station
River Waldon England (Devon) - 1 monitoring station
Walkford Brook England (Hampshire) - 1 monitoring station
River Walkham England (Devon) - 1 monitoring station
Waller Hill Beck England (North Yorkshire) - 2 monitoring stations
River Wallington, Essex England (Essex) - 1 monitoring station
River Wallington, Hampshire England (Hampshire) - 1 monitoring station
Wallop Brook England (Hampshire) - 1 monitoring station
Walsden Water England (West Yorkshire) - 2 monitoring stations
Wandle England (Greater London) - 7 monitoring stations
River Wansbeck England (Northumberland) - 3 monitoring stations
Wansbeck () - 1 monitoring station
Waren Burn England (Northumberland) - 2 monitoring stations
Waring () - 1 monitoring station
River Waring England (Lincolnshire) - 1 monitoring station
Warleggan River England (Cornwall) - 1 monitoring station
Wash Dike England (West Yorkshire) - 2 monitoring stations
Washford River England (Somerset) - 1 monitoring station
Washpit Brook England (Cambridgeshire) - 1 monitoring station
Water of Dye Scotland (Kincardineshire) - 1 monitoring station
Water of Fleet Scotland (The Stewartry of Kirkcudbright) - 1 monitoring station
Water of Girvan Scotland (Ayrshire and Arran) - 1 monitoring station
Water of Leith Scotland (City of Edinburgh) - 2 monitoring stations
Water of Luce Scotland (Wigtown) - 1 monitoring station
Water of Mark Scotland (Angus) - 1 monitoring station
Water of Minnoch Scotland (Wigtown) - 1 monitoring station
River Waveney England (Suffolk, Norfolk) - 6 monitoring stations
Wealdstone Brook England (Greater London) - 2 monitoring stations
River Wear England (Durham) - 5 monitoring stations
Weaver () - 5 monitoring stations
River Weaver England (Cheshire) - 5 monitoring stations
Weedon Beck England (Northamptonshire) - 1 monitoring station
Weighton Lock England (East Riding of Yorkshire) - 1 monitoring station
Weisdale Burn Scotland (Shetland) - 1 monitoring station
River Welland England (Lincolnshire, Rutland, Northamptonshire, Cambridgeshire, Leicestershire) - 8 monitoring stations
Welland (Rockingham - Stamford) () - 1 monitoring station
Welland (Stamford - Peakirk) () - 2 monitoring stations
Welland (To Mkt.Harborough) () - 2 monitoring stations
Welland Below Peakirk () - 3 monitoring stations
Wellow Brook England (Somerset) - 2 monitoring stations
Wendlebury Brook England (Oxfordshire) - 1 monitoring station
Wendling Beck England (Norfolk) - 1 monitoring station
Wendover Springs England (Buckinghamshire) - 1 monitoring station
Wenning () - 4 monitoring stations
River Wenning England (Lancashire, North Yorkshire) - 4 monitoring stations
River Wensum England (Norfolk) - 2 monitoring stations
River Went England (South Yorkshire, West Yorkshire) - 4 monitoring stations
Wesley Brook England (Shropshire) - 1 monitoring station
River West Allen England (Northumberland) - 1 monitoring station
West Bank Pond England (North Yorkshire) - 1 monitoring station
West Beck England (East Riding of Yorkshire) - 1 monitoring station
West Brook England (Hampshire) - 1 monitoring station
West Clough England (East Riding of Yorkshire) - 1 monitoring station
West Dart River England (Devon) - 1 monitoring station
West Fen Catchwater () - 2 monitoring stations
West Fen Catchwater Drain England (Lincolnshire) - 2 monitoring stations
West Glen (To Kates Bridge) () - 4 monitoring stations
West Glen River England (Lincolnshire) - 2 monitoring stations
West Lyn River England (Devon) - 1 monitoring station
West Moor Drain England (Somerset) - 1 monitoring station
West Okement River England (Devon) - 1 monitoring station
West Sedgemoor Drain England (Somerset) - 1 monitoring station
West Water Scotland (Angus) - 1 monitoring station
West Wilder Brook England (Devon) - 1 monitoring station
Western Cleddau Wales (Dyfed) - 3 monitoring stations
Western Drain England (East Riding of Yorkshire) - 1 monitoring station
Western Yar England (Isle of Wight) - 1 monitoring station
River Wey England (Dorset) - 3 monitoring stations
River Wey, Dorset () - 1 monitoring station
River Wey, Surrey England (Surrey, Hampshire) - 11 monitoring stations
Whaddon Brook, Cambridgeshire England (Cambridgeshire) - 1 monitoring station
Whaddon Brook, Gloucestershire England (Gloucestershire) - 1 monitoring station
River Wharfe England (North Yorkshire, West Yorkshire) - 14 monitoring stations
Wheelan Dyke England (North Yorkshire) - 1 monitoring station
Wheeler Wales (Clwyd) - 1 monitoring station
Whetstone Brook England (Leicestershire) - 1 monitoring station
Whiston Brook England (South Yorkshire) - 1 monitoring station
White Cart Water Scotland (Renfrewshire, City of Glasgow) - 2 monitoring stations
White Esk Scotland (Dumfries) - 1 monitoring station
White Laggan Scotland (Wigtown) - 1 monitoring station
White Water Dyke England (Kent) - 1 monitoring station
White Water Dyke Tributary East Stour () - 1 monitoring station
Whiteadder Water Scotland (Berwickshire) - 2 monitoring stations
Whitewater () - 1 monitoring station
River Whitewater England (Hampshire) - 1 monitoring station
Whitley Beck England (Lancashire) - 1 monitoring station
Whitley Brook England (South Yorkshire) - 1 monitoring station
River Whitting England (Derbyshire) - 1 monitoring station
River Whittle England (Norfolk) - 1 monitoring station
Wick Scotland (Caithness) - 1 monitoring station
River Wid England (Essex) - 3 monitoring stations
Willow Beck England (North Yorkshire) - 2 monitoring stations
Willow Brook England (Northamptonshire) - 2 monitoring stations
River Win England (Dorset) - 1 monitoring station
Wincham Brook England (Cheshire) - 1 monitoring station
Windermere England (Cumbria) - 1 monitoring station
Windle Brook England (Surrey) - 1 monitoring station
Windrush () - 5 monitoring stations
River Windrush England (Oxfordshire, Gloucestershire) - 4 monitoring stations
Winestead Drain England (East Riding of Yorkshire) - 2 monitoring stations
Winford Brook England (Somerset) - 2 monitoring stations
River Winterbourne England (Dorset) - 1 monitoring station
Winterbourne Stream England (Berkshire) - 1 monitoring station
River Wiske England (North Yorkshire) - 2 monitoring stations
Wissey () - 1 monitoring station
River Wissey England (Norfolk) - 1 monitoring station
Witcombe Bottom Main Drain England (Somerset) - 1 monitoring station
Witham () - 14 monitoring stations
River Witham England (Lincolnshire) - 15 monitoring stations
Withy Brook England (Cornwall) - 1 monitoring station
Withycombe Brook England (Devon) - 1 monitoring station
Wiza Beck England (Cumbria) - 2 monitoring stations
Wnion Wales (Gwynedd) - 1 monitoring station
Wolf () - 1 monitoring station
River Wolf England (Devon) - 1 monitoring station
Wood Brook England (Leicestershire) - 1 monitoring station
Woodborough Brook England (Nottinghamshire) - 1 monitoring station
Woodbridge Brook England (Wiltshire) - 1 monitoring station
Wool Brook England (Devon) - 1 monitoring station
Wooler Water England (Northumberland) - 2 monitoring stations
Wootton Brook England (Northamptonshire) - 2 monitoring stations
River Worfe England (Shropshire) - 1 monitoring station
Worsley Brook England (Greater Manchester) - 1 monitoring station
River Worth England (West Yorkshire) - 3 monitoring stations
Worth () - 1 monitoring station
Wortley Beck England (West Yorkshire) - 1 monitoring station
Wotton Brook England (Gloucestershire) - 2 monitoring stations
Wraysbury River England (Surrey) - 2 monitoring stations
River Wreake England (Leicestershire) - 3 monitoring stations
River Wriggle England (Dorset) - 1 monitoring station
Wych Brook Wales (Clwyd) - 1 monitoring station
Wydon Burn England (Northumberland) - 1 monitoring station
River Wye England (Derbyshire) - 2 monitoring stations
Wye Wales, England (Powys, Herefordshire, Gloucestershire, Gwent) - 14 monitoring stations
Wye, Buckinghamshire England (Buckinghamshire) - 2 monitoring stations
Wyke Beck England (West Yorkshire) - 2 monitoring stations
River Wylye England (Wiltshire) - 2 monitoring stations
Wymans Brook England (Gloucestershire) - 2 monitoring stations
River Wyre England (Lancashire) - 6 monitoring stations
Wyre (Lancashire) () - 6 monitoring stations
Wyre River England (Cumbria) - 1 monitoring station
River Yare England (Norfolk) - 6 monitoring stations
Yarrow () - 4 monitoring stations
River Yarrow England (Lancashire) - 4 monitoring stations
Yarrow Water Scotland (Roxburgh, Ettrick and Lauderdale) - 3 monitoring stations
River Yarty England (Devon) - 1 monitoring station
Yazor Brook England (Herefordshire) - 1 monitoring station
Yeading Brook England (Greater London) - 4 monitoring stations
Yeading Brook (Eastern Arm) England (Greater London) - 1 monitoring station
Yeading Brook East () - 1 monitoring station
Yeading Brook West () - 1 monitoring station
River Yealm England (Devon) - 2 monitoring stations
River Yeo, Devon England (Devon) - 1 monitoring station
River Yeo, Lapford England (Devon) - 2 monitoring stations
River Yeo, Somerset England (Somerset, Dorset) - 4 monitoring stations
Yeolands Stream England (Devon) - 1 monitoring station
Yscir Wales (Powys) - 1 monitoring station
Ystwyth Wales (Dyfed) - 2 monitoring stations
Ythan Scotland (Aberdeenshire) - 1 monitoring station

Rivers in England, Scotland and Wales which have river level monitoring stations