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Here are all the reported sewage overflow totals for River Test in 2025. Sometimes sewage can be being dumped for months at a time.
| Company | Waterway | Site | Sewage Dumps | Duration (Hours) | Reporting % |
|---|---|---|---|---|---|
| Southern Water | River Test | KINGS SOMBORNE WWTW | 125 | 2,800 | 99.6 |
| Southern Water | River Test | MILLBROOK WWTW | 34 | 448 | 99.9 |
| Southern Water | River Test | ROMSEY WWTW | 17 | 227 | 90.3 |
| Southern Water | River Test | CHILBOLTON WWTW | 2 | 14 | 99.2 |
| Southern Water | River Test | MEMORIAL PARK ROMSEY CEO | 1 | 8 | 75 |
| Southern Water | River Test | BLECHYNDEN TERRACE SOUTHAMPTON CSO | 6 | 8 | 100 |
| Southern Water | River Test | TRAFALGAR WAY STOCKBRIDGE CEO | 2 | 7 | 99.6 |
| Southern Water | River Test | FULLERTON WASTEWATER TREATMENT WORK | 0 | 0 | 100 |
| Southern Water | River Test | HOUGHTON ROAD STOCKBRIDGE CEO | 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. Live sewage data from Stream Water API
Annual figures up to and including 2025 come from official water company returns. The 2026 figure is our own estimate, derived continuously from the companies' live data feeds.
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