Polluted by sewage 180 hours in 2026 so far..
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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 Derby South, 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 | ALVASTON - RAYNESWAY PARK DRIVE (CSO) | River Derwent | 17 | 130 h 13m | 5.42 |
| Severn Trent Water | DERBY - STATION APP/PRIDE PARKWAY (CSO) | River Derwent | 7 | 22 h 56m | 0.92 |
| Severn Trent Water | NORMANTON - CUTTLEBROOK CLOSE (CSO) | Cuttle Brook | 2 | 9 h 59m | 0.38 |
| Severn Trent Water | SINFIN - WILMORE ROAD (CSO) | Meadow Drain | 1 | 9 h 38m | 0.38 |
| Severn Trent Water | DERBY - HARROW STREET (CSO) | River Derwent | 5 | 5 h 25m | 0.21 |
| Severn Trent Water | CHELLASTON - STATION ROAD XX (CSO) | Cuttle Brook | 1 | 0 h 59m | 0 |
| Severn Trent Water | DERBY - MORLEDGE/THORNTREE LANE (CSO) | Markeaton Brook | 1 | 0 h 49m | 0 |
| Severn Trent Water | DERBY - ST PETERS ST/EAST STREET (CSO) | Markeaton Brook | 1 | 0 h 5m | 0 |
| Severn Trent Water | PEAR TREE - LOWER DALE RD (CSO) | Cotton Brook | 0 | 0 h | 0 |
| Severn Trent Water | DERBY - MEADOW ROAD (SSO) | River Derwent | 0 | 0 h | 0 |
| Severn Trent Water | DERBY - GREEN LANE/MACKLIN STREET (CSO) | Markeaton Brook | 0 | 0 h | 0 |
| Severn Trent Water | DERBY - GREEN LANE/MACKLIN STREET (CSO) | Markeaton Brook | 0 | 0 h | 0 |
| Severn Trent Water | DERBY - ST PETERS ST/EAST STREET (CSO) | Markeaton Brook | 0 | 0 h | 0 |
| Severn Trent Water | PEAR TREE - PEAR TREE RD (CSO) | Cotton Brook | 0 | 0 h | 0 |
| Severn Trent Water | NORMANTON - CO-OP ST/PROVIDENT ST (CSO) | Cotton Brook | 0 | 0 h | 0 |
| Severn Trent Water | DERBY - FRIAR GATE/VICTORIA STREET (CSO) | Markeaton Brook | 0 | 0 h | 0 |
| Severn Trent Water | PEAR TREE - HARRINGTON/HOLCOMBE ST (CSO) | Cotton Brook | 0 | 0 h | 0 |
| Severn Trent Water | CHELLASTON - STATION ROAD XX (CSO) | Cuttle Brook | 0 | 0 h | 0 |
| Severn Trent Water | NORMANTON - PORTER ROAD/ALMOND ST (CSO) | Cotton Brook | 0 | 0 h | 0 |
| Severn Trent Water | NORMANTON - PORTER ROAD/ALMOND ST (CSO) | Cotton Brook | 0 | 0 h | 0 |
| Severn Trent Water | PEAR TREE - HARRINGTON/HOLCOMBE ST (CSO) | Cotton Brook | 0 | 0 h | 0 |
| Severn Trent Water | DERBY - MORLEDGE/THORNTREE LANE (CSO) | Markeaton Brook | 0 | 0 h | 0 |
| Severn Trent Water | ALVASTON - RAYNESWAY PARK DRIVE (CSO) | River Derwent | 0 | 0 h | 0 |
| Severn Trent Water | DERBY - FRIAR GATE/VICTORIA STREET (CSO) | Markeaton Brook | 0 | 0 h | 0 |
| Severn Trent Water | DERBY - LITTLEOVER LANE (CSO) | Nailsworth Stream | 0 | 0 h | 0 |
| Severn Trent Water | DERBY - HARROW STREET (CSO) | River Derwent | 0 | 0 h | 0 |
| Severn Trent Water | DERBY - STATION APP/PRIDE PARKWAY (CSO) | River Derwent | 0 | 0 h | 0 |
| Severn Trent Water | Unknown | Unknown | 0 | 0 h | 0 |
| Severn Trent Water | NORMANTON - CO-OP ST/SOCIETY PLACE (CSO) | Cotton Brook | 0 | 0 h | 0 |
| Severn Trent Water | SINFIN - WILMORE ROAD (CSO) | Meadow Drain | 0 | 0 h | 0 |
| Severn Trent Water | PEAR TREE - LOWER DALE RD (CSO) | Cotton Brook | 0 | 0 h | 0 |
| Severn Trent Water | NORMANTON - CO-OP ST/PROVIDENT ST (CSO) | Cotton Brook | 0 | 0 h | 0 |
| Severn Trent Water | NORMANTON - CO-OP ST/SOCIETY PLACE (CSO) | Cotton Brook | 0 | 0 h | 0 |
| Severn Trent Water | NORMANTON - CUTTLEBROOK CLOSE (CSO) | Cuttle Brook | 0 | 0 h | 0 |
| Severn Trent Water | NORMANTON - LOWER DALE RD/BYRON ST (CSO) | Cotton Brook | 0 | 0 h | 0 |
| Severn Trent Water | PEAR TREE - PEAR TREE RD (CSO) | Cotton 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.