Polluted by sewage 3,187 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 Hazel Grove, 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 | Otterspool Road Combined Sewer Overflow | River Goyt | 85 | 433 h 47m | 18.04 |
| United Utilities | Otterspool Road Combined Sewer Overflow | River Goyt | 26 | 303 h 33m | 12.62 |
| United Utilities | LOW MARPLE WwTW | River Etherow | 49 | 257 h 27m | 10.71 |
| United Utilities | Hazel Grove WwTW | River Goyt | 22 | 206 h 38m | 8.58 |
| United Utilities | Hurstheads Lane/Green Lane CSO | River Goyt | 58 | 195 h 6m | 8.12 |
| United Utilities | Hazel Grove WwTW | River Goyt | 18 | 158 h 27m | 6.58 |
| United Utilities | Compstall Road CSO | River Goyt | 46 | 156 h 16m | 6.5 |
| United Utilities | Coppiceside PS | Bollinhurst Brook | 15 | 135 h 47m | 5.62 |
| United Utilities | Bongs Valley PS | River Goyt | 28 | 134 h 56m | 5.58 |
| United Utilities | Coppiceside PS | Bollinhurst Brook | 20 | 126 h 51m | 5.25 |
| United Utilities | LOW MARPLE WwTW | River Etherow | 19 | 126 h 42m | 5.25 |
| United Utilities | STRINES WwTW | River Goyt | 16 | 126 h 40m | 5.25 |
| United Utilities | Compstall Road (Romilly)CSO | River Etherow | 32 | 111 h 3m | 4.62 |
| United Utilities | Hurstheads Lane/Green Lane CSO | River Goyt | 17 | 97 h 45m | 4.04 |
| United Utilities | STRINES WwTW | River Goyt | 34 | 80 h 53m | 3.33 |
| United Utilities | Compstall Road CSO | River Goyt | 15 | 71 h 28m | 2.96 |
| United Utilities | Town Street Combined Sewer Overflow (Site ID 439AB) (STK0138) | River Goyt | 13 | 62 h 18m | 2.58 |
| United Utilities | Bongs Road CSO | River Goyt | 25 | 54 h 34m | 2.25 |
| United Utilities | Opposite 255 Buxton Road CSO | Hazel Grove Brook | 8 | 43 h 8m | 1.79 |
| United Utilities | Buxton Road/Andrew Lane CSO | Unnamed Brook | 22 | 41 h 4m | 1.71 |
| United Utilities | 56 Cross Lane combined sewer overflow (STK0152) | Marple Brook | 3 | 40 h 28m | 1.67 |
| United Utilities | Bongs Valley PS | River Goyt | 13 | 39 h 30m | 1.62 |
| United Utilities | Torkington Road CSO | Ocherley Brook | 2 | 27 h 58m | 1.12 |
| United Utilities | Manor Road PS | River Tame | 6 | 22 h 44m | 0.92 |
| United Utilities | BREDBURY UID CSO | Crookilley Brook Via A Sws | 6 | 21 h 19m | 0.88 |
| United Utilities | Bongs Road CSO | River Goyt | 8 | 15 h 32m | 0.62 |
| United Utilities | Hazelwood Road combined sewer overflow (435GY) (STK0094) | Poise Brook Rvr Goyt | 11 | 14 h 58m | 0.58 |
| United Utilities | Town Street Combined Sewer Overflow (Site ID 439AB) (STK0138) | River Goyt | 2 | 14 h 36m | 0.58 |
| United Utilities | Marple Road CSO | Poise Brook | 9 | 12 h 42m | 0.5 |
| United Utilities | Compstall Road (Romilly)CSO | River Etherow | 6 | 11 h 24m | 0.46 |
| United Utilities | Higher Bents Lane/Newlyn Road CSO | Bredbury Stream Via Sws | 5 | 8 h 44m | 0.33 |
| United Utilities | Buxton Road/Andrew Lane CSO | Unnamed Brook | 6 | 8 h 20m | 0.33 |
| United Utilities | Compstall Road CSO | River Etherow | 5 | 5 h 58m | 0.21 |
| United Utilities | Marple Road CSO | Poise Brook | 3 | 5 h 4m | 0.21 |
| United Utilities | BREDBURY UID CSO | Crookilley Brook Via A Sws | 1 | 4 h 4m | 0.17 |
| United Utilities | 19 Wood Lane (Marple) CSO | Torkington Brook Via Sws | 1 | 3 h 32m | 0.12 |
| United Utilities | Stockport Road CSO | Marple Brook Via Sws | 1 | 2 h 22m | 0.08 |
| United Utilities | Stockport Road West/Ashton Road CSO | Crookilley Brook Via Sws | 8 | 1 h 36m | 0.04 |
| United Utilities | Manor Road PS | River Tame | 3 | 1 h 4m | 0.04 |
| United Utilities | Compstall Road CSO | River Etherow | 1 | 0 h 42m | 0 |
| United Utilities | Stockport Road West/Ashton Road CSO | Crookilley Brook Via Sws | 1 | 0 h 2m | 0 |
| United Utilities | 242 Stockport Road West CSO | Crookilley Brook Culvert | 0 | 0 h | 0 |
| United Utilities | Opposite 255 Buxton Road CSO | Hazel Grove Brook | 0 | 0 h | 0 |
| United Utilities | 36 Hibbert Lane CSO | Marple Brk Torkington Br | 0 | 0 h | 0 |
| United Utilities | Higher Bents Lane/Newlyn Road CSO | Bredbury Stream Via Sws | 0 | 0 h | 0 |
| United Utilities | 242 Stockport Road West CSO | Crookilley Brook Culvert | 0 | 0 h | 0 |
| United Utilities | Hazelwood Road combined sewer overflow (435GY) (STK0094) | Poise Brook Rvr Goyt | 0 | 0 h | 0 |
| United Utilities | 19 Wood Lane (Marple) CSO | Torkington Brook Via Sws | 0 | 0 h | 0 |
| United Utilities | 56 Cross Lane combined sewer overflow (STK0152) | Marple Brook | 0 | 0 h | 0 |
| United Utilities | STRINES WwTW | River Goyt | 0 | 0 h | 0 |
| United Utilities | Torkington Road CSO | Ocherley Brook | 0 | 0 h | 0 |
| United Utilities | Stockport Road CSO | Marple Brook Via Sws | 0 | 0 h | 0 |
| United Utilities | 36 Hibbert Lane CSO | Marple Brk Torkington Br | 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.