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We get information about overflowing CSOs since January 2025. Here is a chart of the last three months of data for Mid Derbyshire, here you can see overflows in red, the darker the red, the more the CSO overflowed that day.
Each CSO has a row, the most recent data is on the right hand side.
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Donate Now| Company | Site Name | Receiving Waterway | Overflow Days | Total Duration (hours) | Total Duration (days) |
|---|---|---|---|---|---|
| Severn Trent Water | KIRK LANGLEY STW (SSTO) | Flagshaw Brook | 54 | 561 h 18m | 23.38 |
| Severn Trent Water | DUFFIELD STW (SSTO) | River Derwent | 29 | 402 h 17m | 16.75 |
| Severn Trent Water | DUFFIELD STW (SSTO) | River Derwent | 33 | 332 h 28m | 13.83 |
| Severn Trent Water | DERBY STW (SSTO) | River Derwent | 33 | 279 h 54m | 11.62 |
| Severn Trent Water | BELPER STW (SSTO) | River Derwent | 29 | 235 h 56m | 9.79 |
| Severn Trent Water | SPONDON - STONEY GATE RD (CSO) | River Derwent | 38 | 186 h 55m | 7.75 |
| Severn Trent Water | DERBY STW (SSTO) | River Derwent | 18 | 150 h 21m | 6.25 |
| Severn Trent Water | BELPER STW (SSTO) | River Derwent | 17 | 138 h 56m | 5.75 |
| Severn Trent Water | DERBY - KEDLESTON RD (CSO) | River Derwent | 31 | 115 h 9m | 4.79 |
| Severn Trent Water | KIRK LANGLEY STW (SSTO) | Flagshaw Brook | 14 | 106 h 48m | 4.42 |
| Severn Trent Water | WESTON UNDERWOOD STW (SSTO) | Greenlane Brook | 15 | 102 h 29m | 4.25 |
| Severn Trent Water | DALE ABBEY (SSO) | Sow Brook | 33 | 98 h 33m | 4.08 |
| Severn Trent Water | HAZELWOOD - NETHER LANE (SSO) | Of River Ecclesbourne | 9 | 82 h | 3.42 |
| Severn Trent Water | HAZELWOOD - NETHER LANE (SSO) | Of River Ecclesbourne | 10 | 81 h 43m | 3.38 |
| Severn Trent Water | DUFFIELD - TOWN STREET (THE LODGE) (CSO) | River Derwent | 24 | 80 h 34m | 3.33 |
| Severn Trent Water | BELPER - BABBINGTON HOSPITAL (SSO) | River Derwent | 24 | 63 h 56m | 2.62 |
| Severn Trent Water | BORROWASH - NEWBOLD AVENUE (CSO) | Ock Brook | 20 | 54 h 24m | 2.25 |
| Severn Trent Water | BELPER - BARGATE ROAD (CSO) | River Derwent | 9 | 54 h 22m | 2.25 |
| Severn Trent Water | ALLESTREE - MARKEATON LANE (CSO) | Markeaton Brook | 11 | 51 h 43m | 2.12 |
| Severn Trent Water | DUFFIELD - MILFORD ROAD (CSO) | River Derwent | 4 | 50 h 37m | 2.08 |
| Severn Trent Water | MILFORD - DERBY ROAD (CSO) | River Derwent | 22 | 46 h 41m | 1.92 |
| Severn Trent Water | SPONDON - DERBY RD/MERCHANT AVENUE (CSO) | River Derwent | 28 | 45 h 54m | 1.88 |
| Severn Trent Water | BELPER - BRIDGEFOOT (CSO) | River Derwent | 14 | 43 h 49m | 1.79 |
| Severn Trent Water | BELPER - BRIDGE HILL/BELPER LANE (CSO) | River Derwent | 21 | 43 h 48m | 1.79 |
| Severn Trent Water | STANLEY - GLEBE CRESCENT (CSO) | Stanley Brook | 16 | 40 h 53m | 1.67 |
| Severn Trent Water | SPONDON - DALE RD/SANDRINGHAM DR (CSO) | River Derwent | 18 | 38 h 53m | 1.58 |
| Severn Trent Water | WESTON UNDERWOOD STW (SSTO) | Greenlane Brook | 7 | 36 h 30m | 1.5 |
| Severn Trent Water | BELPER - BRIDGE ST (F/BALL GROUND) (CSO) | River Derwent | 12 | 31 h 24m | 1.29 |
| Severn Trent Water | SPONDON - ANGLERS LANE XX/XX (CSO) | River Derwent | 5 | 26 h 56m | 1.08 |
| Severn Trent Water | DERBY - KEDLESTON RD (CSO) | River Derwent | 12 | 26 h 10m | 1.08 |
| Severn Trent Water | MILFORD - PLAY GROUND (SSO) | River Derwent | 16 | 24 h 21m | 1 |
| Severn Trent Water | WEST HALLAM - ST WILFRIDS ROAD (CSO) | Stanley Brook | 12 | 21 h 36m | 0.88 |
| Severn Trent Water | ALLESTREE - KEDLESTON RD (CSO) | Markeaton Brook | 19 | 20 h 44m | 0.83 |
| Severn Trent Water | DUFFIELD - TOWN STREET (THE LODGE) (CSO) | River Derwent | 6 | 20 h 25m | 0.83 |
| Severn Trent Water | BELPER - BROADHOLM (SSO) | River Derwent | 7 | 20 h 10m | 0.83 |
| Severn Trent Water | DALE ABBEY (SSO) | Sow Brook | 7 | 18 h 23m | 0.75 |
| Severn Trent Water | BELPER - BRIDGE ST (F/BALL GROUND) (CSO) | River Derwent | 4 | 16 h 49m | 0.67 |
| Severn Trent Water | BELPER - BRIDGE STREET XXX/XXX (CSO) | River Derwent | 23 | 16 h 20m | 0.67 |
| Severn Trent Water | MILFORD - MAIN ROAD (DERBYSHIRE) (SSO) | River Derwent | 9 | 16 h | 0.67 |
| Severn Trent Water | SPONDON - NOTTINGHAM ROAD (CSO) | River Derwent | 12 | 15 h 42m | 0.62 |
| Severn Trent Water | BELPER - BARGATE ROAD (CSO) | River Derwent | 3 | 15 h 1m | 0.62 |
| Severn Trent Water | BORROWASH - BYPASS (CSO) | Ock Brook | 17 | 14 h 25m | 0.58 |
| Severn Trent Water | BELPER - BRIDGEFOOT (CSO) | River Derwent | 4 | 13 h 20m | 0.54 |
| Severn Trent Water | SPONDON - STONEY GATE RD (CSO) | River Derwent | 7 | 13 h 3m | 0.54 |
| Severn Trent Water | BELPER - BABBINGTON HOSPITAL (SSO) | River Derwent | 6 | 11 h 46m | 0.46 |
| Severn Trent Water | MILFORD - DERBY ROAD (CSO) | River Derwent | 5 | 10 h 47m | 0.42 |
| Severn Trent Water | STANLEY COMMON - COMMON LANE (CSO) | Stalney Brook | 11 | 9 h 13m | 0.38 |
| Severn Trent Water | ALLESTREE - DUFFIELD ROAD (SSO) | River Derwent | 3 | 9 h 7m | 0.38 |
| Severn Trent Water | KIRK LANGLEY - MOOR LANE (CSO) | Mackworth Brook | 4 | 8 h 35m | 0.33 |
| Severn Trent Water | MILFORD - SPORTS GROUND (SSO) | River Derwent | 7 | 8 h 6m | 0.33 |
| Severn Trent Water | BORROWASH - NEWBOLD AVENUE (CSO) | Ock Brook | 1 | 7 h 35m | 0.29 |
| Severn Trent Water | STANLEY - GLEBE CRESCENT (CSO) | Stanley Brook | 3 | 7 h 30m | 0.29 |
| Severn Trent Water | SPONDON - DERBY RD/MERCHANT AVENUE (CSO) | River Derwent | 2 | 6 h 26m | 0.25 |
| Severn Trent Water | ALLESTREE - MARKEATON LANE (CSO) | Markeaton Brook | 1 | 5 h 53m | 0.21 |
| Severn Trent Water | SPONDON - ANGLERS LANE XX/XX (CSO) | River Derwent | 1 | 5 h 17m | 0.21 |
| Severn Trent Water | BORROWASH - BYPASS (CSO) | Ock Brook | 1 | 4 h 50m | 0.17 |
| Severn Trent Water | SPONDON - DALE RD/SANDRINGHAM DR (CSO) | River Derwent | 3 | 4 h 18m | 0.17 |
| Severn Trent Water | DERBY - KEDLESTON RD/MAXWELL AVE (CSO) | Northern Flood Culvert | 3 | 3 h 34m | 0.12 |
| Severn Trent Water | WEST HALLAM - ST WILFRIDS ROAD (CSO) | Stanley Brook | 1 | 2 h 55m | 0.08 |
| Severn Trent Water | BELPER - DERBY ROAD/GIBFIELD LANE (CSO) | Coppice Brook | 8 | 2 h 46m | 0.08 |
| Severn Trent Water | MILFORD - PLAY GROUND (SSO) | River Derwent | 4 | 2 h 21m | 0.08 |
| Severn Trent Water | BELPER - BRIDGE STREET/FIELD LANE (CSO) | River Derwent | 8 | 2 h 20m | 0.08 |
| Severn Trent Water | BELPER - BRIDGE STREET XXX/XXX (CSO) | River Derwent | 5 | 2 h 10m | 0.08 |
| Severn Trent Water | LITTLE EATON - ALFRETN RD/WINDY LA (CSO) | Bottle Brook | 1 | 1 h 52m | 0.04 |
| Severn Trent Water | BELPER รขโฌโ KILBOURNE ROAD (CSO) | Coppice Brook | 4 | 1 h 52m | 0.04 |
| Severn Trent Water | ALLESTREE - KEDLESTON RD (CSO) | Markeaton Brook | 1 | 0 h 52m | 0 |
| Severn Trent Water | SPONDON - NOTTINGHAM ROAD (CSO) | River Derwent | 1 | 0 h 46m | 0 |
| Severn Trent Water | BELPER - BRIDGE HILL/BELPER LANE (CSO) | River Derwent | 2 | 0 h 39m | 0 |
| Severn Trent Water | BELPER - MARSH LANE 2 (CSO) | Coppice Brook | 1 | 0 h 38m | 0 |
| Severn Trent Water | BELPER - DERBY ROAD (EX-SILKOLENE) (CSO) | River Derwent | 1 | 0 h 15m | 0 |
| Severn Trent Water | BELPER - DERBY ROAD/GIBFIELD LANE (CSO) | Coppice Brook | 1 | 0 h 14m | 0 |
| Severn Trent Water | BELPER - THE FLEET XX (CSO) | River Derwent | 1 | 0 h 1m | 0 |
| Severn Trent Water | BELPER - MARSH LANE 2 (CSO) | Coppice Brook | 0 | 0 h | 0 |
| Severn Trent Water | LITTLE EATON - DUFFIELD ROAD (SSO) | Bottle Brook | 0 | 0 h | 0 |
| Severn Trent Water | MILFORD - MAIN ROAD (DERBYSHIRE) (SSO) | River Derwent | 0 | 0 h | 0 |
| Severn Trent Water | LITTLE EATON - ALFRETON RD (CSO) | Bottle Brook | 0 | 0 h | 0 |
| Severn Trent Water | DUFFIELD - CASTLE ORCHARD (SSO) | River Derwent | 0 | 0 h | 0 |
| Severn Trent Water | DUFFIELD - MILFORD ROAD (CSO) | River Derwent | 0 | 0 h | 0 |
| Severn Trent Water | BELPER - BELPER LANE (CSO) | River Derwent | 0 | 0 h | 0 |
| Severn Trent Water | BELPER - KING STREET/STRUTT STREET (CSO) | Coppice Brook | 0 | 0 h | 0 |
| Severn Trent Water | BELPER รขโฌโ KILBOURNE ROAD (CSO) | Coppice Brook | 0 | 0 h | 0 |
| Severn Trent Water | BELPER - MARSH LANE 3 (CSO) | Coppice Brook | 0 | 0 h | 0 |
| Severn Trent Water | BELPER - THE FLEET XX (CSO) | River Derwent | 0 | 0 h | 0 |
| Severn Trent Water | DERBY - KEDLESTON RD/MAXWELL AVE (CSO) | Northern Flood Culvert | 0 | 0 h | 0 |
| Severn Trent Water | BELPER - BRIDGE STREET/FIELD LANE (CSO) | River Derwent | 0 | 0 h | 0 |
| Severn Trent Water | LITTLE EATON - ALFRETN RD/WINDY LA (CSO) | Bottle Brook | 0 | 0 h | 0 |
| Severn Trent Water | MILFORD - SPORTS GROUND (SSO) | River Derwent | 0 | 0 h | 0 |
| Severn Trent Water | KIRK LANGLEY - MOOR LANE (CSO) | Mackworth Brook | 0 | 0 h | 0 |
| Severn Trent Water | BELPER - DERBY ROAD (EX-SILKOLENE) (CSO) | River Derwent | 0 | 0 h | 0 |
| Severn Trent Water | BELPER - MARSH LANE 1 (CSO) | Coppice Brook | 0 | 0 h | 0 |
| Severn Trent Water | QUARNDON - CHURCH ROAD XXX (CSO) | Markeaton Brook | 0 | 0 h | 0 |
| Severn Trent Water | LITTLE EATON - DUFFIELD ROAD (SSO) | Bottle Brook | 0 | 0 h | 0 |
| Severn Trent Water | BELPER - MARSH LANE 1 (CSO) | Coppice Brook | 0 | 0 h | 0 |
| Severn Trent Water | MILFORD - FOUNDRY LANE PS (CSO) | River Derwent | 0 | 0 h | 0 |
| Severn Trent Water | BELPER - MARSH LANE 4 (CSO) | Coppice Brook | 0 | 0 h | 0 |
| Severn Trent Water | BELPER - WHEELDON AVENUE (CSO) | Coppice Brook | 0 | 0 h | 0 |
| Severn Trent Water | BELPER - BELPER LANE (CSO) | River Derwent | 0 | 0 h | 0 |
| Severn Trent Water | ALLESTREE - DUFFIELD ROAD (SSO) | River Derwent | 0 | 0 h | 0 |
| Severn Trent Water | MILFORD - FOUNDRY LANE PS (CSO) | River Derwent | 0 | 0 h | 0 |
| Severn Trent Water | QUARNDON - CHURCH ROAD XXX (CSO) | Markeaton Brook | 0 | 0 h | 0 |
| Severn Trent Water | STANLEY COMMON - COMMON LANE (CSO) | Stalney Brook | 0 | 0 h | 0 |
| Severn Trent Water | BELPER - BROADHOLM (SSO) | River Derwent | 0 | 0 h | 0 |
| Severn Trent Water | BORROWASH - HAWTHORNE AVE (CSO) | Ock Brook | 0 | 0 h | 0 |
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
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.
Get in touch if you have queries or want to discuss our data.
press [at] top-of-the-poops.org