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Polluted by sewage 1,665 times in 2024 lasting 5,629 hours
So far this year (as of May 1, 2025, 9:00 PM) there has been 704 hours of sewage overflows
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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 Bristol North West, 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 NowHere are all the reported sewage overflow totals for Bristol North West in 2024. Sometimes sewage can be being dumped for months at a time.
Reporting refers to how much of the time the monitoring was active. In this constituency all the declared CSOs appeared to have monitoring enabled for more than 50% of the year
| Company | Waterway | Site | Sewage Dumps | Duration (Hours) | Reporting % |
|---|---|---|---|---|---|
| Wessex Water | Severn Estuary | AVONMOUTH STW | 141 | 2,123 | 99.7 |
| Wessex Water | River Avon Via Sws | THE PORTWAY CSO | 58 | 619 | 100 |
| Wessex Water | Horfield Brook Via Sws | FILTON AVENUE CSO | 111 | 351 | 99.4 |
| Wessex Water | River Avon Via Sws | LOWER HIGH STREET CSO | 37 | 249 | 99.8 |
| Wessex Water | River Trym Via Sws | WELLINGTON HILL WEST CSO | 56 | 241 | 100 |
| Wessex Water | River Avon | WEST TOWN ROAD PUMPING STATION | 76 | 202 | 99.9 |
| Wessex Water | River Trym Via Sws | CHERINGTON ROAD CSO | 49 | 165 | 90.3 |
| Wessex Water | River Avon | WESTBURY ON TRYM STORM OVERFLOW | 49 | 165 | 99.9 |
| Wessex Water | River Trym | GLENWOOD ROAD CSO | 50 | 163 | 100 |
| Wessex Water | River Avon Via Sws | PORTWAY COMBINED SEWER OVERFLOW | 85 | 147 | 99.5 |
| Wessex Water | River Trym Via Sws | STOKE LANE COMBINED SEWER OVERFLOW | 68 | 142 | 100 |
| Wessex Water | River Trym Via Sws | BISHOPTHORPE ROAD CSO | 65 | 132 | 100 |
| Wessex Water | River Avon | WEST TOWN ROAD PUMPING STATION | 28 | 105 | 100 |
| Wessex Water | River Trym Via Sws | HENLEAZE ROAD CSO | 54 | 103 | 91.1 |
| Wessex Water | River Trym | TRYM ROAD CSO | 38 | 97 | 100 |
| Wessex Water | River Trym Via Sws | 11 NEWCOMBE ROAD CSO | 40 | 79 | 100 |
| Wessex Water | River Avon | AVONMOUTH WAY COMBINED SEWER OF | 18 | 73 | 86.3 |
| Wessex Water | River Severn Estuary Via Sws | THIRD WAY CSO | 20 | 68 | 99.2 |
| Wessex Water | River Trym | MERLIN CLOSE CSO | 35 | 47 | 100 |
| Wessex Water | River Trym Via Sws | 224 HENLEAZE ROAD CSO | 37 | 41 | 97.2 |
| Wessex Water | River Trym Via Sws | DRUID WOOD COMBINED SEWER OVERFLOW | 28 | 39 | 99.3 |
| Wessex Water | Bristol Avon Via Sws Estuarine | GLOUCESTER ROAD CSO | 33 | 37 | 94.9 |
| Wessex Water | River Severn Via Sws | QUEEN STREET CSO | 12 | 33 | 99.8 |
| Wessex Water | River Avon Via Sws | HUDDS VALE ROAD CSO | 34 | 22 | 100 |
| Wessex Water | River Avon Via Sws | AVONMOUTH ROAD CSO | 47 | 20 | 100 |
| Wessex Water | Boiling Wells Lane Stream | MULLER ROAD ALLOTMENTS CSO | 22 | 19 | 100 |
| Wessex Water | River Avon | BRIDGE VALLEY ROAD CSO | 26 | 15 | 99.3 |
| Wessex Water | River Trym Via Sws | ABBEY ROAD COMBINED SEWER OVERFLOW | 31 | 14 | 98.6 |
| Wessex Water | River Trym Via Sws | WESTBURY ROAD COMBINED SEWER OF | 18 | 14 | 100 |
| Wessex Water | River Trym Via Sws | WESTBURY ROAD COMBINED SEWER OF | 31 | 11 | 100 |
| Wessex Water | Bristol Avon | AVONMOUTH 'B' PUMPING STATION | 4 | 11 | 99.1 |
| Wessex Water | River Trym Via Sws | 250 HENLEAZE ROAD CSO | 22 | 9 | 99.2 |
| Wessex Water | River Trym Via Sws | HENLEAZE ROAD CSO | 25 | 8 | 99.2 |
| Wessex Water | River Avon Via Sws | 5 SPRINGFIELD AVENUE CSO | 32 | 7 | 96.9 |
| Wessex Water | River Trym Via Sws | SHIREHAMPTON ROAD CSO | 28 | 7 | 92.8 |
| Wessex Water | Cranbrook Via Sws | DEVONSHIRE ROAD CSO | 30 | 5 | 100 |
| Wessex Water | River Avon Via Sws | OLD PARK RD COMBINED SEWER OVERFLOW | 25 | 4 | 93.6 |
| Wessex Water | River Trym Via Sws | EASTFIELD ROAD CSO | 22 | 3 | 99.4 |
| Wessex Water | River Avon Via Sws | 30 STATION ROAD CSO | 18 | 3 | 96 |
| Wessex Water | River Avon Via Sws | SEA MILLS LANE (2) CSO | 3 | 3 | 97 |
| Wessex Water | River Avon Via Sws | 7 SPRINGFIELD AVENUE CSO | 16 | 2 | 99 |
| Wessex Water | River Avon Via Sws | SEA MILLS LANE (PORTWAY BRIDGE) CSO | 1 | 1 | 73.8 |
| Wessex Water | Tidal Avon | O/S 82 CHARLTON ROAD CSO | 7 | 1 | 99.3 |
| Wessex Water | Cranbrook | 82 HOWARD ROAD CSO | 4 | 1 | 99.5 |
| Wessex Water | River Trym Via Sws | 175 WELLINGTON HILL WEST CSO | 6 | 1 | 81 |
| Wessex Water | River Avon | WATLING WAY COMBINED SEWER OVERFLOW | 7 | 1 | 87 |
| Wessex Water | River Trym Via Sws | HARBURY ROAD COMBINED SEWER OF | 7 | 0 | 99.7 |
| Wessex Water | River Trym Via Sws | LAWRENCE GROVE CSO | 2 | 0 | 99.1 |
| Wessex Water | Cranbrook Via Sws | 1 HOWARD ROAD CSO | 2 | 0 | 100 |
| Wessex Water | River Avon | LAMPLIGHTERS SEWAGE PUMPING STATION | 1 | 0 | 98.9 |
| Wessex Water | River Trym Via Sws | HARBURY ROAD CSO | 3 | 0 | 99.1 |
| Wessex Water | River Trym Via Sw | ROCKSIDE DRIVE CSO | 2 | 0 | 99.1 |
| Wessex Water | River Trym Via Sws | OAKWOOD ROAD CSO | 1 | 0 | 97.8 |
| Wessex Water | Bristol Avon | 201 GLOUCESTER ROAD CSO | 0 | 0 | 99.1 |
| Wessex Water | River Trym Via Sws | HENLEAZE PARK DRIVE CSO | 0 | 0 | 100 |
| Wessex Water | River Trym Via Sws | 147 WELLINGTON HILL WEST NO2 CSO | 0 | 0 | 99.4 |
| Wessex Water | River Trym Via Sws | 147 WELLINGTON HILL WEST NO2 CSO | 0 | 0 | 99.3 |
| Wessex Water | River Avon Via Sws | LOWER HIGH STREET CSO | 0 | 0 | 99.7 |
| Wessex Water | River Trym Via Sws | HENBURY ROAD CSO | 0 | 0 | 99.7 |
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. This 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