Polluted by sewage 2,157 hours in 2025
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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 Gorton and Denton, 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) |
|---|---|---|---|---|---|
| United Utilities | Denton Transfer PS | River Tame | 57 | 357 h 30m | 14.88 |
| United Utilities | Denton Transfer PS | River Tame | 23 | 239 h 47m | 9.96 |
| United Utilities | Meadow Lane CSO | River Tame | 55 | 228 h 47m | 9.5 |
| United Utilities | Denton Transfer PS | River Tame | 53 | 218 h 32m | 9.08 |
| United Utilities | Rear of Kennedy Way CSO | Denton Brook Via Sws | 67 | 160 h 53m | 6.67 |
| United Utilities | Ross Lave Lane CSO | Denton Brook | 49 | 125 h 5m | 5.21 |
| United Utilities | Sheridan Way CSO | River Tame | 15 | 89 h 36m | 3.71 |
| United Utilities | Sheridan Way CSO | River Tame | 28 | 79 h 40m | 3.29 |
| United Utilities | Denton Transfer PS | River Tame | 14 | 79 h 4m | 3.29 |
| United Utilities | Rear of Kennedy Way CSO | Denton Brook Via Sws | 15 | 72 h 37m | 3 |
| United Utilities | Off Gibralter Lane Haughton Green CSO | River Tame | 43 | 62 h 34m | 2.58 |
| United Utilities | Town Lane/Circular Road CSO | Denton Brook River Tame | 33 | 62 h 30m | 2.58 |
| United Utilities | HYDE ROAD Denton CSO | River Tame | 34 | 54 h 38m | 2.25 |
| United Utilities | Ross Lave Lane CSO | Denton Brook | 12 | 49 h | 2.04 |
| United Utilities | Victoria Street/Acre Street Storm Overflow | Denton Brook Via Sws | 26 | 34 h 20m | 1.42 |
| United Utilities | SHOECROFT GARAGE SITE CSO | Denton Brook Via Sws | 20 | 32 h 6m | 1.33 |
| United Utilities | Windmill Lane CSO | Denton Brook Via Clvr Wcourse | 14 | 28 h 33m | 1.17 |
| United Utilities | Meadow Lane CSO | River Tame | 9 | 26 h 57m | 1.08 |
| United Utilities | Town Lane/Circular Road CSO | Denton Brook River Tame | 9 | 24 h 38m | 1 |
| United Utilities | Mount Road CSO | Gore Brook Via Sws | 8 | 22 h 28m | 0.92 |
| United Utilities | Off Gibralter Lane Haughton Green CSO | River Tame | 9 | 20 h 26m | 0.83 |
| United Utilities | Thornley Lane South CSO | Unnamed Denton Brk Sws | 10 | 18 h 49m | 0.75 |
| United Utilities | HYDE ROAD Denton CSO | River Tame | 5 | 9 h 44m | 0.38 |
| United Utilities | Wakeling/Stockport Road CSO | River Tame | 3 | 8 h 42m | 0.33 |
| United Utilities | Mill Lane CSO | River Tame | 4 | 8 h 24m | 0.33 |
| United Utilities | Off Manor Road CSO | River Tame | 6 | 6 h 48m | 0.25 |
| United Utilities | Windmill Lane CSO | Denton Brook Via Clvr Wcourse | 1 | 6 h 17m | 0.25 |
| United Utilities | Beresford Road Combined Sewer Overflow | Clvrt Section Of Gore Brook | 4 | 5 h 48m | 0.21 |
| United Utilities | Mount Road CSO | Gore Brook Via Sws | 1 | 5 h 22m | 0.21 |
| United Utilities | Victoria Street/Acre Street Storm Overflow | Denton Brook Via Sws | 4 | 4 h 20m | 0.17 |
| United Utilities | Thornley Lane South CSO | Unnamed Denton Brk Sws | 3 | 4 h 18m | 0.17 |
| United Utilities | Off St Lawrence Road CSO | River Tame Via Sws | 1 | 3 h 40m | 0.12 |
| United Utilities | Manshaw Road CSO | Moss Brook Via Sws | 4 | 2 h 42m | 0.08 |
| United Utilities | Junction of Ashton New Road CSO | Windle Brook | 2 | 2 h 26m | 0.08 |
| United Utilities | SHOECROFT GARAGE SITE CSO | Denton Brook Via Sws | 2 | 0 h 50m | 0 |
| United Utilities | Clare Road/Davenhill Road CSO | Cringle Beck | 0 | 0 h | 0 |
| United Utilities | Off Manor Road CSO | River Tame | 0 | 0 h | 0 |
| United Utilities | Off St Lawrence Road CSO | River Tame Via Sws | 0 | 0 h | 0 |
| United Utilities | The Mad Hatter Pub CSO | Gore Brook | 0 | 0 h | 0 |
| United Utilities | Beresford Road Combined Sewer Overflow | Clvrt Section Of Gore Brook | 0 | 0 h | 0 |
| United Utilities | Junction of Ashton New Road CSO | Windle Brook | 0 | 0 h | 0 |
| United Utilities | Wakeling/Stockport Road CSO | River Tame | 0 | 0 h | 0 |
| United Utilities | Clare Road/Davenhill Road CSO | Cringle Beck | 0 | 0 h | 0 |
| United Utilities | Manshaw Road CSO | Moss Brook Via Sws | 0 | 0 h | 0 |
| United Utilities | Mill Lane CSO | River Tame | 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.