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Derbyshire Dales - Live Sewage

Polluted by sewage 22,783 hours in 2026 - That's 2.64 years , monitoring offline 4,824 hours , potential overflows 146 hours so far..

© OpenStreetMap contributors
Contains OS Data © Crown copyright & database right 2021-2024
© Top of the Poops 2021-2024

Which Year?

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View Annual Sewage Data

You're looking at the totals that we have calculated for sewage in Derbyshire Dales so far for 2026. It is an estimate, based on very poor quality live data from the Water Companies. The water companies report their sewage to the Environment Agency every year in April. You can see the last reported year in the other page

What's a potential overflow? If the CSO goes 'Offline' while its Overflowing, we don't know if it stopped overflowing until we get a 'Stop' event.

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Daily Data

Jan - 6,330 hours , 123 potential
Feb - 12,810 hours , 17 potential
Mar - 1,572 hours , 331 offline
Apr - 56 hours , 157 offline
May - 131 hours , 302 offline
Jun - 382 hours , 390 offline
Jul - 39 hours , 6 potential
Aug - 527 hours , 465 offline
Sept - 156 hours , 362 offline
Oct - 775 hours , 97 offline
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Totals so far

Company Site Name Receiving Waterway Overflow Days Total Duration (hours) Offline/Potential Pollution
Severn Trent Water WHATSTANDWELL STW (SSTO) River Derwent 62 1,227h 55m -
Severn Trent Water MATLOCK LEA STW (SSTO) River Derwent 77 1,193h 36m 21 h
Severn Trent Water BASLOW STW (SSTO) River Derwent 62 1,071h 40m -
Severn Trent Water WIRKSWORTH STW (SSTO) River Ecclesbourne 71 1,048h 44m -
Severn Trent Water YEAVELEY STW (SSTO) Shirley Brook 73 1,047h 58m -
Severn Trent Water BAKEWELL - PICKORY CORNER STW (SSTO) River Wye 58 924h 58m 50 h
Severn Trent Water BRADWELL - THE CRESCENT XX (CSO) Bradwell Brook 86 915h 57m 29 h
Severn Trent Water KNIVETON STW (SSTO) Kniveton Brook 70 903h 57m 325 h
Severn Trent Water MATLOCK - BAKEWELL RD (HOOLEY TOWN) (SSO) River Derwent 68 880h 38m -
Severn Trent Water BRADWELL STW (SSTO) Bradwell Brook 66 867h 14m 6 h
Severn Trent Water TIDESWELL STW (SSTO) Tideswell Brook 68 849h 57m 27 h
Severn Trent Water BRAILSFORD STW (SSTO) Brailsford Brook 88 768h 3m -
Severn Trent Water SUDBURY STW (CSO) River Dove 52 737h 47m 26 h
Severn Trent Water MATLK BTH-DALE RD (COAL MERCHANTS) (CSO) River Derwent 97 704h 9m -
Severn Trent Water ASHBOURNE STW (SSTO) Bentley Brook 46 703h 23m 62 h
Severn Trent Water Unknown Unknown 69 677h 48m -
Severn Trent Water ASHFORD - CHURCH ST (POST OFFICE) (CSO) River Wye 43 664h 25m 72 h
Severn Trent Water ASHFORD - BUXTON ROAD (CSO) River Wye 37 617h 51m -
Severn Trent Water CROMFORD - VIA GELLIA (CSO) Receiving Water Not Defined 64 587h 11m 39 h
Severn Trent Water BAKEWELL - HADDON ROAD TPS (CSO) River Wye 51 563h -
Severn Trent Water HOGNASTON STW (CSO) Henmore Brook 40 433h 18m 27 h
Severn Trent Water NORTHWOOD - DALE ROAD NORTH (CSO) River Derwent 34 396h 35m 116 h
Severn Trent Water HILTON - EGGINGTON ROAD (CSO) Hilton Brook 27 376h 3m 97 h
Severn Trent Water CUBLEY (CSO) Bentley Brook 34 368h 31m 0 h
Severn Trent Water ASHBOURNE - LIME CLOSE (CSO) River Dove 21 327h 52m -
Severn Trent Water HATHERSAGE STW (SSTO) River Derwent 41 322h 48m -
Severn Trent Water DARLEY DALE - DARLEY BRIDGE PS (CSO) River Derwent 47 316h 31m 27 h
Severn Trent Water GRINDLEFORD (SSO) River Trent 31 284h 14m 190 h
Severn Trent Water STANTON IN PEAK - BOWERS HALL (CSO) River Lathkill 40 259h 54m -
Severn Trent Water DARLEY BRIDGE - MAIN ROAD/WENSLEES (CSO) River Derwent 42 239h 25m 18 h
Severn Trent Water CARSINGTON - B5035 PS (CSO) Carsington Res 32 197h 37m 28 h
Severn Trent Water OSMASTON - CHURCH LANE (SSO) Shirley Brook 19 191h 8m 367 h
Severn Trent Water YEAVELEY STW (CSO) Shirley Brook 24 190h 34m 75 h
Severn Trent Water NORTHWOOD - DALE RD NORTH(RAILWAY) (CSO) River Derwent 29 185h 21m 28 h
Severn Trent Water HILTON - MILL LANE (SSO) Hilton Brook 15 170h 52m -
Severn Trent Water CLIFTON - VILLAGE PS (CSO) Henmore Brook 15 140h 27m -
Severn Trent Water Unknown Unknown 44 130h 51m 29 h
Severn Trent Water TANSLEY - OLD COACH ROAD (POND) (CSO) Bentley Brook 21 121h 26m 173 h
Severn Trent Water HULLAND WARD STW (SSTO) Biggin Brook/ Biggin Brk 34 117h 1m -
Severn Trent Water CLIFTON - WATERY LANE/GREEN LANE (CSO) Unnamed Draining To Henmore Brook 11 115h 33m -
Severn Trent Water DARLEY DALE - FOUR LANE ENDS (SSO) River Derwent 26 111h 41m -
Severn Trent Water SETTLED STORM OVERFLOW-3PG Marston Brook 21 75h 31m 156 h
Severn Trent Water FOSTON - OFF WATERY LANE (CSO) Foston Brook 7 73h 21m -
Severn Trent Water Unknown Unknown 9 72h 18m 92 h
Severn Trent Water HATTON - CHURCH AVENUE (CSO) Hilton Brook 6 62h 35m -
Severn Trent Water THORPE (CSO) Thorpe Brook 10 48h 41m 92 h
Severn Trent Water HOLLOWAY - LEA ROAD (LEA MILLS) (CSO) Lea Brook 21 47h 11m 249 h
Severn Trent Water MATLOCK - STONEY WAY (CSO) Bentley Brook 17 43h 10m -
Severn Trent Water SNITTERTON - SNITTERTON ROAD (SSO) River Derwent 12 32h 45m 134 h
Severn Trent Water CROMFORD - MARKET PLACE (CSO) Cromford Canal 23 28h 13m 72 h
Severn Trent Water TURNDITCH - COWERS LANE (SSO) Franker Brook 8 27h 1m 181 h
Severn Trent Water SUDBURY - SCHOOL LANE (CSO) River Dove 4 25h 18m 109 h
Severn Trent Water DARLEY DALE - DALE ROAD SOUTH (CSO) River Derwent 13 25h 11m 36 h
Severn Trent Water CURBAR - RIDDINGS LANE (CSO) River Derwent 23 24h 51m -
Severn Trent Water MATLOCK - IMPERIAL ROAD (CSO) River Derwent 19 23h 4m -
Severn Trent Water CALVER - SHEFFIELD ROAD (CSO) Dale Brook 3 21h 53m -
Severn Trent Water DARLEY DALE - CHURCH ROAD (CSO) River Derwent 10 19h 57m 43 h
Severn Trent Water BRAILSFORD STW (CSO) Brailsford Brook 8 18h 22m -
Severn Trent Water ASHBOURNE - OFF KING EDWARD ST (CSO) Henmore Brook 19 16h 30m -
Severn Trent Water TANSLEY - OLD COACH ROAD (CSO) Bentley Brook 13 14h 52m 18 h
Severn Trent Water MATLOCK - BANK ROAD (POST OFFICE) (CSO) River Derwent 19 14h 45m -
Severn Trent Water ASHBOURNE - KING EDWARD STREET (CSO) Henmore Brook 8 11h 44m -
Severn Trent Water FENNY BENTLEY (CSO) Bentley Brook 3 11h 41m 225 h
Severn Trent Water BAKEWELL - SOUTH CHURCH ST (CSO) River Wye 7 10h 59m 7 h
Severn Trent Water TWO DALES - DALE RD SOUTH (GARAGE) (CSO) Warney Brook 4 10h 6m 18 h
Severn Trent Water ASHBOURNE - HENMORE BROOK (CSO) Henmore Brook 8 9h 56m 108 h
Severn Trent Water CROWDECOTE (CSO) River Dove 11 9h 54m 85 h
Severn Trent Water BONSALL - CLATTERWAY/BLACK TOR RD (CSO) River Derwent 17 8h 51m 159 h
Severn Trent Water BAKEWELL - BASLOW ROAD (CSO) River Wye 4 6h 16m 0 h
Severn Trent Water BASLOW CAR PARK (SSO) Bar Brook 1 5h 28m 2 h
Severn Trent Water HATHERSAGE - MILL LANE (MILL COTT) (CSO) Hood Brook 4 5h 11m -
Severn Trent Water MATLOCK - ALFRETON RD (CSO) Bentley Brook 4 4h 52m -
Severn Trent Water BEELEY (SSO) Beeley Brook 2 4h 42m 53 h
Severn Trent Water EDENSOR (SSO) River Derwent 2 3h 25m -
Severn Trent Water HARTINGTON STW (SSTO) River Dove 7 3h 9m 109 h
Severn Trent Water TWO DALE-CHESTERFLD RD (THE CROFT) (CSO) Warney Brook 4 2h 215 h
Severn Trent Water HOMESFORD - DERBY ROAD (CSO) River Derwent 2 1h 16m 0 h
Severn Trent Water LITTON - BUXTON ROAD/LITTON DALE (CSO) Tideswell Brook 3 1h 1m 109 h
Severn Trent Water DARLEY DALE - DALE ROAD NORTH (CSO) Warney Brook 2 0h 55m -
Severn Trent Water MATLOCK - KNOWLESTON PLACE (SSO) Bentley Brook 2 0h 33m 42 h
Severn Trent Water DARLEY DALE - STATION ROAD (CSO) River Derwent 1 0h 24m -
Severn Trent Water BAKEWELL - MARKET STREET (CSO) River Wye 1 0h 21m -
Severn Trent Water MATLOCK - BANK RD(COUNCIL OFFICES) (CSO) River Derwent 2 0h 8m -
Severn Trent Water MATLOCK - DALE RD (RAILWAY BRIDGE) (CSO) River Derwent 1 0h 4m 25 h
Severn Trent Water MATLOCK - MATLOCK GREEN (CSO) Bentley Brook 1 0h 2m -
Severn Trent Water BONSALL - YEOMAN STREET (CSO) River Derwent 1 0h 1m 1 h
Severn Trent Water MAPLETON TPS (CSO) River Dove 1 0h 22 h
Severn Trent Water BAKEWELL - NORTH CHURCH STREET (CSO) River Wye 0 0h -
Severn Trent Water LITTON - BUXTON ROAD/LITTON DALE (CSO) Tideswell Brook 0 0h -
Severn Trent Water OSMASTON - CHURCH LANE (SSO) Shirley Brook 0 0h -
Severn Trent Water DARLEY BRIDGE - MAIN ROAD/WENSLEES (CSO) River Derwent 0 0h -
Severn Trent Water THORPE (CSO) Thorpe Brook 0 0h -
Severn Trent Water HOMESFORD - DERBY ROAD (CSO) River Derwent 0 0h -
Severn Trent Water TWO DALES - DALE RD SOUTH (GARAGE) (CSO) Warney Brook 0 0h -
Severn Trent Water BRAILSFORD STW (SSTO) Brailsford Brook 0 0h -
Severn Trent Water MATLCK BTH-DALE RD (CABLE CR BRDG) (CSO) River Derwent 0 0h -
Severn Trent Water CROMFORD - VIA GELLIA (CSO) Receiving Water Not Defined 0 0h -
Severn Trent Water TWO DALES - CHESTERFIELD RD (CSO) Warney Brook 0 0h -
Severn Trent Water MATLOCK - MATLOCK GREEN (CSO) Bentley Brook 0 0h -
Severn Trent Water SHELDON - JOHNSON LA TPS (CSO) Shack 0 0h -
Severn Trent Water KNIVETON STW (SSTO) Kniveton Brook 0 0h -
Severn Trent Water MATLOCK - KNOWLESTON PLACE (SSO) Bentley Brook 0 0h -
Severn Trent Water HOGNASTON STW (CSO) Henmore Brook 0 0h -
Severn Trent Water BAKEWELL - SOUTH CHURCH ST (CSO) River Wye 0 0h -
Severn Trent Water SNITTERTON - SNITTERTON ROAD (SSO) River Derwent 0 0h -
Severn Trent Water ASHBOURNE STW (SSTO) Bentley Brook 0 0h -
Severn Trent Water MATLOCK - MATLOCK GRN/LIME TREE RD (CSO) Bentley Brook 0 0h -
Severn Trent Water CROMFORD - MARKET PLACE (CSO) Cromford Canal 0 0h -
Severn Trent Water WIRKSWORTH STW (SSTO) River Ecclesbourne 0 0h -
Severn Trent Water CARSINGTON - B5035 PS (CSO) Carsington Res 0 0h -
Severn Trent Water CROMFORD MEADOWS - RAILWAY BRIDGE (CSO) River Derwent 0 0h 24 h
Severn Trent Water HILTON - EGGINGTON ROAD (CSO) Hilton Brook 0 0h -
Severn Trent Water WHATSTANDWELL STW (SSTO) River Derwent 0 0h -
Severn Trent Water MATLK BTH-DALE RD (COAL MERCHANTS) (CSO) River Derwent 0 0h -
Severn Trent Water MATLOCK - BANK RD(COUNCIL OFFICES) (CSO) River Derwent 0 0h -
Severn Trent Water ASHBOURNE - LIME CLOSE (CSO) River Dove 0 0h -
Severn Trent Water TIDESWELL STW (SSTO) Tideswell Brook 0 0h -
Severn Trent Water CROMFORD MEADOWS - RAILWAY BRIDGE (CSO) River Derwent 0 0h -
Severn Trent Water HULLAND WARD STW (SSTO) Biggin Brook/ Biggin Brk 0 0h -
Severn Trent Water ASHBOURNE - OFF KING EDWARD ST (CSO) Henmore Brook 0 0h -
Severn Trent Water SHIRLEY STW (SSTO) Shirley Brook 0 0h -
Severn Trent Water BONSALL - CLATTERWAY/BLACK TOR RD (CSO) River Derwent 0 0h -
Severn Trent Water NORTHWOOD - NORTHWOOD LANE (CSO) River Derwent 0 0h -
Severn Trent Water BONSALL - YEOMAN STREET (CSO) River Derwent 0 0h -
Severn Trent Water MATLOCK - BAKEWELL ROAD/DIMPLE RD (CSO) River Derwent 0 0h -
Severn Trent Water MATLOCK - STONEY WAY (CSO) Bentley Brook 0 0h -
Severn Trent Water CLIFTON - MAYFIELD ROAD PS (CSO) Henmore/Scow Brook 0 0h -
Severn Trent Water BAKEWELL - BASLOW ROAD (CSO) River Wye 0 0h -
Severn Trent Water TANSLEY - OLD COACH ROAD (CSO) Bentley Brook 0 0h -
Severn Trent Water CROMFORD MEADOWS - PIPE BRIDGE (CSO) River Derwent 0 0h 193 h
Severn Trent Water TWO DALES - CHESTERFIELD RD (CSO) Warney Brook 0 0h -
Severn Trent Water ASHBOURNE - KING EDWARD STREET (CSO) Henmore Brook 0 0h -
Severn Trent Water MATLOCK - DALE RD (RAILWAY BRIDGE) (CSO) River Derwent 0 0h -
Severn Trent Water MATLOCK - IMPERIAL ROAD (CSO) River Derwent 0 0h -
Severn Trent Water BASLOW CAR PARK (SSO) Bar Brook 0 0h -
Severn Trent Water FOSTON - OFF WATERY LANE (CSO) Foston Brook 0 0h -
Severn Trent Water CROWDECOTE (CSO) River Dove 0 0h -
Severn Trent Water ASHBOURNE - HENMORE BROOK (CSO) Henmore Brook 0 0h -
Severn Trent Water DARLEY DALE - DALE ROAD SOUTH (CSO) River Derwent 0 0h -
Severn Trent Water YEAVELEY STW (CSO) Shirley Brook 0 0h -
Severn Trent Water SETTLED STORM OVERFLOW-3PG Marston Brook 0 0h -
Severn Trent Water MATLOCK - BAKEWELL ROAD/DIMPLE RD (CSO) River Derwent 0 0h -
Severn Trent Water CUBLEY (CSO) Bentley Brook 0 0h -
Severn Trent Water YEAVELEY STW (SSTO) Shirley Brook 0 0h -
Severn Trent Water HARTINGTON STW (SSTO) River Dove 0 0h -
Severn Trent Water CLIFTON - VILLAGE PS (CSO) Henmore Brook 0 0h -
Severn Trent Water WIRKSWORTH - WARMBROOK/DERBY ROAD (SO) River Ecclesbourne 0 0h -
Severn Trent Water MAPLETON TPS (CSO) River Dove 0 0h -
Severn Trent Water WIRKSWORTH - WARMBROOK/DERBY ROAD (SO) River Ecclesbourne 0 0h -
Severn Trent Water DARLEY DALE - STATION ROAD (CSO) River Derwent 0 0h -
Severn Trent Water SUDBURY - SCHOOL LANE (CSO) River Dove 0 0h -
Severn Trent Water STANTON IN PEAK - BOWERS HALL (CSO) River Lathkill 0 0h -
Severn Trent Water BAKEWELL - NORTH CHURCH STREET (CSO) River Wye 0 0h -
Severn Trent Water CROMFORD MEADOWS - PIPE BRIDGE (CSO) River Derwent 0 0h -
Severn Trent Water WYASTON STW (CSO) Wyaston Brook 0 0h -
Severn Trent Water NORTHWOOD - DALE RD NORTH(RAILWAY) (CSO) River Derwent 0 0h -
Severn Trent Water FENNY BENTLEY (CSO) Bentley Brook 0 0h -
Severn Trent Water NORTHWOOD - DALE ROAD NORTH (CSO) River Derwent 0 0h -
Severn Trent Water BAKEWELL - PICKORY CORNER STW (SSTO) River Wye 0 0h -
Severn Trent Water CALVER - SHEFFIELD ROAD (CSO) Dale Brook 0 0h -
Severn Trent Water TURNDITCH - COWERS LANE (SSO) Franker Brook 0 0h -
Severn Trent Water HILTON - MILL LANE (SSO) Hilton Brook 0 0h -
Severn Trent Water HATTON - CHURCH AVENUE (CSO) Hilton Brook 0 0h -
Severn Trent Water MATLOCK - BANK ROAD (POST OFFICE) (CSO) River Derwent 0 0h -
Severn Trent Water DARLEY DALE - DALE ROAD NORTH (CSO) Warney Brook 0 0h -
Severn Trent Water BRADWELL STW (SSTO) Bradwell Brook 0 0h -
Severn Trent Water NORTHWOOD - NORTHWOOD LANE (CSO) River Derwent 0 0h 191 h
Severn Trent Water SUDBURY STW (CSO) River Dove 0 0h -
Severn Trent Water TANSLEY - OLD COACH ROAD (POND) (CSO) Bentley Brook 0 0h -
Severn Trent Water ASHFORD - CHURCH ST (POST OFFICE) (CSO) River Wye 0 0h -
Severn Trent Water HATHERSAGE - MILL LANE (MILL COTT) (CSO) Hood Brook 0 0h -
Severn Trent Water CURBAR - RIDDINGS LANE (CSO) River Derwent 0 0h -
Severn Trent Water WOLDS RESERVOIR (CSO) Bentley Brook 0 0h -
Severn Trent Water BONSALL - THE CROSS (CSO) River Derwent 0 0h -
Severn Trent Water DARLEY DALE - FOUR LANE ENDS (SSO) River Derwent 0 0h -
Severn Trent Water BRADWELL - THE CRESCENT XX (CSO) Bradwell Brook 0 0h -
Severn Trent Water DARLEY DALE - DARLEY BRIDGE PS (CSO) River Derwent 0 0h -
Severn Trent Water BONSALL - THE CROSS (CSO) River Derwent 0 0h 48 h
Severn Trent Water TWO DALES - GREENWAY LN/ODDFORD LN (CSO) Warney Brook 0 0h -
Severn Trent Water BAKEWELL - MARKET STREET (CSO) River Wye 0 0h -
Severn Trent Water SHELDON - JOHNSON LA TPS (CSO) Shack 0 0h 25 h
Severn Trent Water MATLOCK - BAKEWELL RD (HOOLEY TOWN) (SSO) River Derwent 0 0h -
Severn Trent Water TWO DALES - GREENWAY LN/ODDFORD LN (CSO) Warney Brook 0 0h 1 h
Severn Trent Water BRAILSFORD STW (CSO) Brailsford Brook 0 0h -
Severn Trent Water ASHFORD - BUXTON ROAD (CSO) River Wye 0 0h -
Severn Trent Water BASLOW STW (SSTO) River Derwent 0 0h -
Severn Trent Water CLIFTON - MAYFIELD ROAD PS (CSO) Henmore/Scow Brook 0 0h -
Severn Trent Water TWO DALE-CHESTERFLD RD (THE CROFT) (CSO) Warney Brook 0 0h -
Severn Trent Water SHIRLEY STW (SSTO) Shirley Brook 0 0h -
Severn Trent Water GRINDLEFORD (SSO) River Trent 0 0h -
Severn Trent Water CLIFTON - WATERY LANE/GREEN LANE (CSO) Unnamed Draining To Henmore Brook 0 0h -
Severn Trent Water MATLOCK - ALFRETON RD (CSO) Bentley Brook 0 0h -
Severn Trent Water BAKEWELL - HADDON ROAD TPS (CSO) River Wye 0 0h -
Severn Trent Water DARLEY DALE - CHURCH ROAD (CSO) River Derwent 0 0h -
Severn Trent Water MATLOCK - MATLOCK GRN/LIME TREE RD (CSO) Bentley Brook 0 0h -
Severn Trent Water HOLLOWAY - LEA ROAD (LEA MILLS) (CSO) Lea Brook 0 0h -
Severn Trent Water HATHERSAGE STW (SSTO) River Derwent 0 0h -
Severn Trent Water BEELEY (SSO) Beeley Brook 0 0h -
Severn Trent Water WYASTON STW (CSO) Wyaston Brook 0 0h 108 h
Severn Trent Water ROWSLEY - SCHOOL LANE (SSO) River Wye 0 0h 163 h
Severn Trent Water EDENSOR (SSO) River Derwent 0 0h -
Severn Trent Water MATLOCK LEA STW (SSTO) River Derwent 0 0h -

Data Sources & Accuracy

EDM (Event Duration Monitoring) data and Consented Discharges to Controlled Waters with Conditions from Environment Agency & Data Map Wales, and Scottish Water

Experimental derived data from Thames Water API, Some data may be missing or inaccurate. Live sewage data from Stream Water API

Annual figures up to and including 2025 come from official water company returns. The 2026 figure is our own estimate, derived continuously from the companies' live data feeds.

Uses Environment Agency rainfall data from the real-time data API (Beta) - Rainfall data is delayed by up to two days.

This website is intended to provide an accurate representation of the Environment Agency data. The data is hard to use, and thus some errors may have been made. If you find something that is incorrect, please raise an issue at the GitHub issues page and we'll endeavour to fix it quickly.

This project is not associated, approved or endorsed by any of the companies whose logos you see here.