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Here are all the reported sewage overflow totals for River Llynfi in 2025. Sometimes sewage can be being dumped for months at a time.
| Company | Waterway | Site | Sewage Dumps | Duration (Hours) | Reporting % |
|---|---|---|---|---|---|
| Dwr Cymru Welsh Water | River Llynfi | LLETTY BRONGU STW LLANGYNWYD MAESTG | 130 | 2,015 | 99.9 |
| Dwr Cymru Welsh Water | River Llynfi | Maesteg South CSO Asset 95015 | 107 | 794 | 99.9 |
| Dwr Cymru Welsh Water | River Llynfi | 27 Talbot Street CSO, Maesteg | 132 | 700 | 98.2 |
| Dwr Cymru Welsh Water | River Llynfi | SPELTER CSO ASSET 52423 | 78 | 699 | 94.1 |
| Dwr Cymru Welsh Water | River Llynfi | CAERAU ROAD CSO ASSET 52427 MAESTEG | 50 | 583 | 99.8 |
| Dwr Cymru Welsh Water | River Llynfi | CSO STH OF GREENFIELD TERRACE PONT | 90 | 473 | 99.9 |
| Dwr Cymru Welsh Water | River Llynfi | Hermon Road CSO Asset 52425 Maesteg | 81 | 330 | 99.9 |
| Dwr Cymru Welsh Water | River Llynfi | CSO Caerau Square (Point 10) | 87 | 187 | 82.3 |
| Dwr Cymru Welsh Water | River Llynfi | SLAUGHTER HOUSE CSO ASSET 52415 | 41 | 154 | 99.9 |
| Dwr Cymru Welsh Water | River Llynfi | Trefecca Old Railway CSO, Maesgwyn | 22 | 103 | 99.4 |
| Dwr Cymru Welsh Water | River Llynfi | Brid Ogwr Pt 32 Aberkenfig CSO Br'd | 24 | 72 | 99.9 |
| Dwr Cymru Welsh Water | River Llynfi | Church Street CSO, Maesteg | 23 | 25 | 80.6 |
| Dwr Cymru Welsh Water | River Llynfi | CSO Cwmfelin (Point 26) | 14 | 5 | 77.7 |
| Dwr Cymru Welsh Water | River Llynfi | CSO at Maesteg Market (Point 18) | 17 | 4 | 100 |
| Dwr Cymru Welsh Water | River Llynfi | A479 Bronlly Road CSO | 6 | 4 | 99.5 |
| Dwr Cymru Welsh Water | River Llynfi | HEARTS OF OAK COTTAGES (STORM) MA | 0 | 0 | 83.7 |
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.
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