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Polluted by sewage 407 times in 2025 lasting 6,405 hours
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Donate NowHere are all the reported sewage overflow totals for Chichester 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 all the declared CSO Combined Sewage Overflow - a device that, when operating, pours combined rainwater & sewage into a waterway s appeared to have monitoring enabled for more than 50% of the year
| Company | Waterway | Site | Sewage Dumps | Duration (Hours) | Reporting % |
|---|---|---|---|---|---|
| Southern Water | River Lavant | LAVANT WWTW | 166 | 3,582 | 90.6 |
| Southern Water | Chichester Harbour | CHICHESTER WWTW | 66 | 988 | 98.3 |
| Southern Water | Broad Rife | SIDLESHAM WWTW | 37 | 435 | 100 |
| Southern Water | Chichester Hbr Via Little Deep | THORNHAM WWTW | 37 | 361 | 100 |
| Southern Water | Pagham Rife | PAGHAM WASTEWATER TREATMENT WORKS | 22 | 357 | 98.6 |
| Southern Water | Chichester Harbour Channel | BOSHAM WWTW | 22 | 220 | 100 |
| Southern Water | Ham Brook | CSO BREAKERS YARD NUTBOURNE | 19 | 189 | 99.3 |
| Southern Water | Aldingbourne Rife | TANGMERE WASTEWATER TREATMENT WORKS | 10 | 137 | 99.9 |
| Southern Water | Chichester Harbour | MAIN ROAD FISHBOURNE CSO | 8 | 46 | 100 |
| Southern Water | Bremere Rife | MAIN ROAD HUNSTON CEO | 4 | 33 | 100 |
| Southern Water | Ham Brook | SCHOOL LANE PS | 2 | 23 | 100 |
| Southern Water | To Chichester Harbour | CHIDHAM LANE SPS CHIDHAM | 3 | 18 | 100 |
| Southern Water | Chichester Harbour | TAYLORS LANE BOSHAM, WWPS | 3 | 8 | 100 |
| Southern Water | Pagham Rife | NORTH MUNDHAM WPS (PAGHAM ROAD) | 8 | 2 | 100 |
| Southern Water | English Channel | CHURCH ROAD SELSEY CSO | 0 | 0 | 85.5 |
| Southern Water | English Channel | EAST BEACH ROAD SELSEY CSO | 0 | 0 | 68.4 |
| Southern Water | River Ems | LUMLEY ROAD PUMPING STATION | 0 | 0 | 100 |
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.
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Get in touch if you have queries or want to discuss our data.
press [at] top-of-the-poops.org