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Here are all the reported sewage overflow totals for River Medway Estuary in 2025. Sometimes sewage can be being dumped for months at a time.
| Company | Waterway | Site | Sewage Dumps | Duration (Hours) | Reporting % |
|---|---|---|---|---|---|
| Southern Water | River Medway Estuary | FURRELLS ROAD, ROCHESTER CSO | 26 | 70 | 100 |
| Southern Water | River Medway Estuary | HAM HILL S.T.W. | 8 | 54 | 98 |
| Southern Water | River Medway Estuary | HOO WWPS | 11 | 43 | 93.5 |
| Southern Water | River Medway Estuary | PUMP LANE GILLINGHAM TANK CSO | 15 | 42 | 100 |
| Southern Water | River Medway Estuary | CHATHAM HILL OUTSIDE 425 CSO | 13 | 25 | 48 |
| Southern Water | River Medway Estuary | MAGPIE HALL ROAD CHATHAM OUTSIDE 33 | 24 | 22 | 78.6 |
| Southern Water | River Medway Estuary | BRAMBLETREE CRESCENT BORSTAL CEO | 12 | 21 | 99.9 |
| Southern Water | River Medway Estuary | WOODCHURCH CRESCENT GILLINGHAM CSO | 16 | 9 | 100 |
| Southern Water | River Medway Estuary | SECOND AVENUE NO 2 CSO | 11 | 5 | 83.6 |
| Southern Water | River Medway Estuary | CLOVER STREET CHATHAM CSO | 11 | 3 | 99.7 |
| Southern Water | River Medway Estuary | SECOND AVE CHATHAM NO1 CSO | 3 | 2 | 78.9 |
| Southern Water | River Medway Estuary | RECTORY CLOSE WOULDHAM WWPS | 2 | 2 | 100 |
| Southern Water | River Medway Estuary | SECOND AVENUE NO 3 CHATHAM CSO | 3 | 2 | 95.9 |
| Southern Water | River Medway Estuary | LOWER RAINHAM ROAD LOWER RAINHAM PS | 2 | 1 | 100 |
| Southern Water | River Medway Estuary | VICARAGE ROAD STROOD WPS | 1 | 1 | 100 |
| Southern Water | River Medway Estuary | WALDERSLADE ROAD CHATHAM 149 CSO | 1 | 0 | 47.9 |
| Southern Water | River Medway Estuary | MELBOURNE ROAD CHATHAM CSO | 2 | 0 | 85.7 |
| Southern Water | River Medway Estuary | GROVE ROAD CHATHAM O/S 77 CSO | 1 | 0 | 99.6 |
| Southern Water | River Medway Estuary | PUMP LANE GILLINGHAM NO.1 CSO | 1 | 0 | 50.3 |
| Southern Water | River Medway Estuary | CHATHAM HILL CHATHAM OUTSIDE 10 CSO | 0 | 0 | 50.5 |
| Southern Water | River Medway Estuary | CSO HOPWELL DRIVE (CHATHAM) | 0 | 0 | 99.6 |
| Southern Water | River Medway Estuary | MAGPIE HALL ROAD OUTSIDE 60 CSO | 0 | 0 | 64.8 |
| Southern Water | River Medway Estuary | ORDNANCE TERRACE CHATHAM CSO | 0 | 0 | 23.7 |
| Southern Water | River Medway Estuary | STURLA ROAD CHATHAM CSO | 0 | 0 | 88.5 |
| Southern Water | River Medway Estuary | DIAL ROAD GILLINGHAM CSO | 0 | 0 | 49.9 |
| Southern Water | River Medway Estuary | PUMP LANE GILLINGHAM NO.2 CSO | 0 | 0 | 99.6 |
| Southern Water | River Medway Estuary | CORPORATION STREET ROCHESTER CEO | 0 | 0 | 88.8 |
| Southern Water | River Medway Estuary | GROVE ROAD STROOD CSO | 0 | 0 | 91.6 |
| Southern Water | River Medway Estuary | HIGH STREET ROCHESTER CSO | 0 | 0 | 13.9 |
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