Media Queries
Get in touch if you have queries or want to discuss our data.
press [at] top-of-the-poops.org
Please Support Us
We rely on donations to fund our work. Please support us if you can
Here are all the reported sewage overflow totals for River Usk 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 Usk | USK STW GRAIG OLWAY FARM LLANGVIEW | 87 | 1,453 | 99.9 |
| Dwr Cymru Welsh Water | River Usk | BRECON STW BRECON WWTW BRECON POWYS | 85 | 1,429 | 99.9 |
| Dwr Cymru Welsh Water | River Usk | SENNYBRIDGE ARMY CAMP STW | 117 | 1,419 | 99.8 |
| Dwr Cymru Welsh Water | River Usk | LLANGYBI STW LLANGYBI USK | 234 | 1,345 | 99.9 |
| Dwr Cymru Welsh Water | River Usk | BWLCH (S) STW LLANGYNIDIR | 107 | 872 | 99.7 |
| Dwr Cymru Welsh Water | River Usk | ABERBAIDEN STW BEHIND HOP YARD FARM | 113 | 578 | 99.9 |
| Dwr Cymru Welsh Water | River Usk | LLANFOIST WASTEWATER TREATMENT WORKS ME | 65 | 502 | 99.9 |
| Dwr Cymru Welsh Water | River Usk | GARN PS CRICKHOWELL | 53 | 274 | 99.8 |
| Dwr Cymru Welsh Water | River Usk | Mill Street Screens CSO Abergaven | 69 | 263 | 99.6 |
| Dwr Cymru Welsh Water | River Usk | CSO at Christchurch WWTW | 75 | 214 | 93.8 |
| Dwr Cymru Welsh Water | River Usk | Llangynidr (Coed-yr-Ynys) SPS | 43 | 179 | 98.3 |
| Dwr Cymru Welsh Water | River Usk | St Cadocs Hospital CSO | 51 | 150 | 99.6 |
| Dwr Cymru Welsh Water | River Usk | SPS at Brecon - Watton 10 Metres South Of | 66 | 136 | 99.9 |
| Dwr Cymru Welsh Water | River Usk | Legar CSO | 32 | 107 | 99.3 |
| Dwr Cymru Welsh Water | River Usk | BRECON SEWERAGE SYSTEM | 25 | 92 | 97.8 |
| Dwr Cymru Welsh Water | River Usk | CRICKHOWELL STW ABERGAVENNY ROAD | 13 | 87 | 99.9 |
| Dwr Cymru Welsh Water | River Usk | Brecon Showfields CSO Brecon Powys | 23 | 64 | 94.4 |
| Dwr Cymru Welsh Water | River Usk | CRICKHOWELL CSO | 10 | 51 | 66.4 |
| Dwr Cymru Welsh Water | River Usk | A Combined Sewer Overflow St Julian | 31 | 34 | 99.9 |
| Dwr Cymru Welsh Water | River Usk | CRICKHOWELL - BRIDGE END CAR P | 3 | 24 | 99.9 |
| Dwr Cymru Welsh Water | River Usk | Brynawel Estate, Trecastle CSO | 2 | 1 | 97.3 |
| Dwr Cymru Welsh Water | River Usk | Bridge St CSO | 5 | 1 | 22.5 |
| Dwr Cymru Welsh Water | River Usk | Crickhowell - Bullpit Meadow S CSO | 4 | 1 | 99.9 |
| Dwr Cymru Welsh Water | River Usk | Caerleon Town Sewage Pumping Station | 0 | 0 | 99.9 |
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
Annual figures up to and including 2025 come from official water company returns. The 2026 figure is our own estimate, derived continuously from the companies' live data feeds.
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