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Polluted by sewage 1,093 times in 2024 lasting 16,761 hours - That's 1.94 years!
So far this year (as of May 9, 2025, 5:15 AM) there has been 2,814 hours of sewage overflows - that's 0.33 years!
Your local MP is Freddie Van Mierlo (Liberal Democrat) - 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 Henley and Thame, 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 Henley and Thame 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 | Gainsbridge Brook | LITTLE MILTON STW, LITTLE MILTON, O | 168 | 3,544 | 97.9 |
| Thames Water | Wheatley Ditch | WHEATLEY STW, WHEATLEY, OXON | 160 | 3,188 | 83.8 |
| Thames Water | Warpsgrave Ditch | CHALGROVE STW, CHALGROVE, OXON | 147 | 2,854 | 98.4 |
| Thames Water | Howbery Ditch | BENSON STW, HENLEY ROAD, BENSON, OX | 101 | 1,770 | 99.8 |
| Thames Water | Lashlake Stream | THAME WASTEWATER TREATMENT WORKS | 105 | 1,608 | 100 |
| Thames Water | Fawley Court Stream | HENLEY WASTEWATER TREATMENT WORKS | 86 | 950 | 100 |
| Thames Water | Henton Stream | CHINNOR STW, CHINNOR, OXON | 105 | 825 | 99.7 |
| Thames Water | Thame | DORCHESTER WWTW | 63 | 791 | 99.5 |
| Thames Water | Pyrton Stream | Watlington | 90 | 703 | 99.7 |
| Thames Water | Latchford Brook | TETSWORTH STW, TETSWORTH, THAME, OX | 30 | 295 | 99.9 |
| Thames Water | Otmoor Lane Ditch | CONSTABLE'S PIECE WWTW | 10 | 90 | 100 |
| Thames Water | Sydenham Stream | Manor Farm | 4 | 60 | 100 |
| Thames Water | Thames | Friday Street, Henley | 17 | 53 | 95 |
| Thames Water | Polecat End Ditch | Forest Hill | 5 | 24 | 100 |
| Thames Water | Into Land | Sonning Common | 2 | 2 | 100 |
| Thames Water | Thames | Reading, Caversham | 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