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Polluted by sewage 537 times in 2024 lasting 7,560 hours
So far this year (as of May 29, 2025, 2:15 AM) there has been 1,570 hours of sewage overflows
Your local MP is Chris Hinchliff (Labour) - Find out more about their interests, donors, and voting at They Work For You
We get information about overflowing CSOs since January 2025. Here is a chart of the last three months of data for North East Hertfordshire, here you can see overflows in red, the darker the red, the more the CSO overflowed that day.
Each CSO has a row, the most recent data is on the right hand side.
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Donate NowHere are all the reported sewage overflow totals for North East Hertfordshire in 2024. 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 CSOs 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 | 190 | 3,648 | 99.7 |
| Thames Water | River Quin | BARKWAY WASTEWATER TREATMENT WORKS | 70 | 1,296 | 100 |
| Thames Water | River Beane | WESTON (HERTS) WWTW | 86 | 1,201 | 100 |
| Thames Water | River Rib | THERFIELD WTW | 34 | 443 | 99.8 |
| Anglian Water | River Rhee | ASHWELL WATER RECYCLING CENTRE | 45 | 421 | 94 |
| Thames Water | River Rib | BUNTINGFORD WWTW | 31 | 237 | 100 |
| Thames Water | River Rib | STANDON STW, STANDON, HERTS | 17 | 100 | 99.8 |
| Anglian Water | Fowlmere Stream | BARLEY STW | 30 | 86 | 100 |
| Thames Water | Rib | Chapmore End | 17 | 66 | 100 |
| Anglian Water | Pix Brook | LETCHWORTH-NORTON COMMON CSO | 15 | 45 | 100 |
| Anglian Water | Cat Of River Ivel | SANDON STW | 2 | 13 | 99.4 |
| Anglian Water | Pix Brook, River Gt Ouse | LETCHWORTH WATER RECYCLING CENTRE | 0 | 0 | 100 |
| Anglian Water | Onto Land | BALDOCK PS | 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. This 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