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Polluted by sewage 325 times in 2025 lasting 4,833 hours
Monitoring fell below 50% in some locations so could be more
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Donate NowHere are all the reported sewage overflow totals for Romsey and Southampton North in 2025. 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 1 of the total 19 CSO Combined Sewage Overflow - a device that, when operating, pours combined rainwater & sewage into a waterway locations had reporting enabled for less than half the year.
| Company | Waterway | Site | Sewage Dumps | Duration (Hours) | Reporting % |
|---|---|---|---|---|---|
| Southern Water | River Test | KINGS SOMBORNE WWTW | 125 | 2,800 | 99.6 |
| Southern Water | River Blackwater | WEST WELLOW WWTW | 101 | 1,303 | 99.9 |
| Southern Water | River Blackwater | WELLOW MILL WPS | 25 | 238 | 100 |
| Southern Water | River Test | ROMSEY WWTW | 17 | 227 | 90.3 |
| Southern Water | Marshcourt River | STOCKBRIDGE WWTW | 18 | 139 | 98.9 |
| Southern Water | Unnamed Of River Test | RINGWOOD DRIVE NORTH BADDESLEY CEO | 9 | 58 | 99.7 |
| Southern Water | River Itchen | GREEN LANE CHILWORTH CEO | 6 | 29 | 99.7 |
| 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 | TRAFALGAR WAY STOCKBRIDGE CEO | 2 | 7 | 99.6 |
| Southern Water | River Itchen | SIRDAR ROAD SOUTHAMPTON CSO | 17 | 6 | 100 |
| Southern Water | Saline Estuary | WESSEX LANE SOUTHAMPTON OUTSIDE 11 | 2 | 0 | 95 |
| Southern Water | Tadburn Lake | BOTLEY ROAD WPS (NORTH BADDESLEY) | 0 | 0 | 99.6 |
| Southern Water | Tadburn Lake | EIGHT ACRES ROMSEY CSO | 0 | 0 | 48.9 |
| Southern Water | River Test | FULLERTON WASTEWATER TREATMENT WORK | 0 | 0 | 100 |
| Southern Water | River Test | HOUGHTON ROAD STOCKBRIDGE CEO | 0 | 0 | 99.7 |
| Southern Water | Tadburn Lake | THE HUNDRED ROMSEY CSO | 0 | 0 | 53.4 |
| Southern Water | Saline Estuary | WESSEX LANE SOUTHAMPTON | 0 | 0 | 97.3 |
| Southern Water | Saline Estuary | WESSEX LANE SOUTHAMPTON OUTSIDE 15 | 0 | 0 | 79.1 |
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