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Polluted by sewage 199 times in 2025 lasting 1,315 hours
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Donate NowHere are all the reported sewage overflow totals for North East Hertfordshire 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 % |
|---|---|---|---|---|---|
| Thames Water | Cottered Brook | COTTERED WASTEWATER TREATMENT WORKS | 36 | 594 | 100 |
| Thames Water | River Beane | WESTON (HERTS) WWTW | 39 | 461 | 100 |
| Thames Water | River Quin | BARKWAY WASTEWATER TREATMENT WORKS | 7 | 93 | 100 |
| Thames Water | River Rib | THERFIELD WTW | 5 | 58 | 99.7 |
| Anglian Water | Fowlmere Stream | BARLEY STW | 29 | 36 | 100 |
| Anglian Water | Pix Brook, River Gt Ouse | LETCHWORTH WATER RECYCLING CENTRE | 5 | 24 | 100 |
| Anglian Water | Pix Brook | LETCHWORTH-NORTON COMMON CSO | 8 | 13 | 98.1 |
| Thames Water | River Rib | STANDON STW, STANDON, HERTS | 2 | 10 | 99.4 |
| Thames Water | Rib | Chapmore End | 7 | 9 | 100 |
| Anglian Water | River Rhee | ASHWELL WATER RECYCLING CENTRE | 10 | 5 | 100 |
| Thames Water | River Rib | BUNTINGFORD WWTW | 3 | 5 | 100 |
| Anglian Water | Onto Land | BALDOCK PS | 48 | 3 | 99.7 |
| Anglian Water | Cat Of River Ivel | SANDON STW | 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.
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