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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 South West Wiltshire, 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) |
|---|---|---|---|---|---|
| Wessex Water | MERE ROOK STREET STORM TANK | Shreen Water | 18 | 271 h 44m | 11.29 |
| Wessex Water | DILTON MARSH INLET | Fairbourne Stream | 15 | 158 h 41m | 6.58 |
| Wessex Water | MERE SHAFTESBURY ROAD | Shreen Water | 13 | 142 h 8m | 5.92 |
| Wessex Water | WESTBURY STORM TANK | Bitham Brook/ Bitham Brook | 14 | 117 h 26m | 4.88 |
| Wessex Water | DILTON MARSH INLET | Fairbourne Stream | 16 | 111 h 58m | 4.62 |
| Wessex Water | WARMINSTER STORM TANK | River Wylye | 8 | 105 h 6m | 4.38 |
| Wessex Water | EDINGTON TINHEAD LOWER BAYNTON ROAD | Buckington Drove | 15 | 100 h 50m | 4.17 |
| Wessex Water | TROWBRIDGE CANAL ROAD | River Biss Via Sws | 13 | 75 h 16m | 3.12 |
| Wessex Water | SOUTHWICK CHANTRY GARDENS | Lambrok Stream | 8 | 74 h 55m | 3.08 |
| Wessex Water | TROWBRIDGE BRADFORD ROAD INLET | F/E-River Avon, Cso-River Biss | 9 | 64 h 30m | 2.67 |
| Wessex Water | WARMINSTER STORM TANK | River Wylye | 7 | 60 h 36m | 2.5 |
| Wessex Water | WESTBURY STORM TANK | Bitham Brook/ Bitham Brook | 5 | 49 h 10m | 2.04 |
| Wessex Water | SOUTHWICK CHANTRY GARDENS | Lambrok Stream | 5 | 41 h 33m | 1.71 |
| Wessex Water | MERE STW ADJ TO | Shreen Water | 27 | 38 h 30m | 1.58 |
| Wessex Water | MERE SHAFTESBURY ROAD | Shreen Water | 7 | 36 h 38m | 1.5 |
| Wessex Water | WARMINSTER CALVESWATER | Were Via Sws | 17 | 35 h 40m | 1.46 |
| Wessex Water | MAIDEN BRADLEY INLET | Groundwater Via Infilt System | 17 | 33 h 26m | 1.38 |
| Wessex Water | WARMINSTER WEYMOUTH STREET R/O XX IN PLEASURE GARDENS NEAR SWIMMING POOL | River Wyle Via Were | 32 | 33 h 6m | 1.38 |
| Wessex Water | MERE ROOK STREET STORM TANK | Shreen Water | 7 | 29 h 46m | 1.21 |
| Wessex Water | WARMINSTER WEYMOUTH STREET R/O XX IN PLEASURE GARDENS NEAR SWIMMING POOL | River Wyle Via Were | 12 | 16 h 19m | 0.67 |
| Wessex Water | WARMINSTER CALVESWATER | Were Via Sws | 6 | 15 h | 0.62 |
| Wessex Water | MERE STW ADJ TO | Shreen Water | 10 | 12 h 48m | 0.5 |
| Wessex Water | TROWBRIDGE CANAL ROAD | River Biss Via Sws | 6 | 11 h 20m | 0.46 |
| Wessex Water | BRATTON TROWBRIDGE ROAD | Bitham Brook | 5 | 10 h 54m | 0.42 |
| Wessex Water | MAIDEN BRADLEY INLET | Groundwater Via Infilt System | 7 | 7 h 40m | 0.29 |
| Wessex Water | DILTON MARSH IN FIELD BEHIND XXX HIGH STREET | Allebourne Brook | 5 | 7 h 30m | 0.29 |
| Wessex Water | WESTBURY FROGMORE ROAD OPP XX | Bitham Brook/ Bitham Brook | 6 | 7 h 2m | 0.29 |
| Wessex Water | DILTON MARSH IN FIELD BEHIND XXX HIGH STREET | Allebourne Brook | 2 | 6 h 54m | 0.25 |
| Wessex Water | BRATTON TROWBRIDGE ROAD | Bitham Brook | 3 | 6 h 36m | 0.25 |
| Wessex Water | WESTBURY FROGMORE ROAD OPP XX | Bitham Brook/ Bitham Brook | 9 | 5 h 54m | 0.21 |
| Wessex Water | EDINGTON TINHEAD LOWER BAYNTON ROAD | Buckington Drove | 7 | 3 h 55m | 0.12 |
| Wessex Water | DILTON MARSH PEN KNAPP | Biss Brook | 2 | 3 h 4m | 0.12 |
| Wessex Water | WESTBURY INLET | Bitham Brook/ Bitham Brook | 2 | 2 h 30m | 0.08 |
| Wessex Water | MAIDEN BRADLEY OFF KINGSTON LANE | River Wylye | 7 | 1 h 26m | 0.04 |
| Wessex Water | TROWBRIDGE STALLARD STREET O/S XX | River Biss Via Sws | 1 | 0 h 46m | 0 |
| Wessex Water | TROWBRIDGE STALLARD STREET O/S XX | River Biss Via Sws | 1 | 0 h 34m | 0 |
| Wessex Water | WARMINSTER GEORGE ST | Were | 1 | 0 h 22m | 0 |
| Wessex Water | WESTBURY ALFRED ST CONSERVATIVE CLUB | Bitham Brook | 1 | 0 h 14m | 0 |
| Wessex Water | MAIDEN BRADLEY OFF KINGSTON LANE | River Wylye | 1 | 0 h 12m | 0 |
| Wessex Water | TROWBRIDGE ROSECROFT POLEBARN ROAD | Paxcroft Brook Via Sws | 1 | 0 h 2m | 0 |
| Wessex Water | TROWBRIDGE THE SHIRES MULTI-STOREY CAR PARK/BASEMENT | River Biss Via Sws | 0 | 0 h | 0 |
| Wessex Water | WESTBURY WEST END O/S XX | Bitham Brook Via Sws | 0 | 0 h | 0 |
| Wessex Water | NORTH BRADLEY CHURCHLANDS | Biss Brook | 0 | 0 h | 0 |
| Wessex Water | TROWBRIDGE BRADFORD ROAD INLET | F/E-River Avon, Cso-River Biss | 0 | 0 h | 0 |
| Wessex Water | TROWBRIDGE THE SHIRES MULTI-STOREY CAR PARK/BASEMENT | River Biss Via Sws | 0 | 0 h | 0 |
| Wessex Water | NORTH BRADLEY CHURCHLANDS | Biss Brook | 0 | 0 h | 0 |
| Wessex Water | Unknown | Unknown | 0 | 0 h | 0 |
| Wessex Water | CHAPMANSLADE DIVERS BRIDGE | Rodden Brook | 0 | 0 h | 0 |
| Wessex Water | DILTON MARSH PEN KNAPP | Biss Brook | 0 | 0 h | 0 |
| Wessex Water | TROWBRIDGE WICKER HILL O/S MANE EVENT HAIRDRESSERS | River Biss | 0 | 0 h | 0 |
| Wessex Water | WARMINSTER GEORGE ST | Were | 0 | 0 h | 0 |
| Wessex Water | WESTBURY INLET | Bitham Brook/ Bitham Brook | 0 | 0 h | 0 |
| Wessex Water | TROWBRIDGE ROSECROFT POLEBARN ROAD | Paxcroft Brook Via Sws | 0 | 0 h | 0 |
| Wessex Water | WESTBURY ALFRED ST CONSERVATIVE CLUB | Bitham Brook | 0 | 0 h | 0 |
| Wessex Water | MERE GARAGE ADJ TO | Shreen Water | 0 | 0 h | 0 |
| Wessex Water | Unknown | Unknown | 0 | 0 h | 0 |
| Wessex Water | MONKTON DEVERILL HINDON ROAD STORM TANK | River Wylye | 0 | 0 h | 0 |
| Wessex Water | MONKTON DEVERILL HINDON ROAD STORM TANK | River Wylye | 0 | 0 h | 0 |
| Wessex Water | CHAPMANSLADE DIVERS BRIDGE | Rodden 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