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Here are all the reported sewage overflow totals for River Sirhowy 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 Sirhowy | Tredegar Park Place CSO | 161 | 709 | 94.9 |
| Dwr Cymru Welsh Water | River Sirhowy | Springfield Est CSO, Pontllanfraith | 83 | 489 | 97.1 |
| Dwr Cymru Welsh Water | River Sirhowy | CSO 32075 Opposite Garibaldi Bridge | 75 | 302 | 99.1 |
| Dwr Cymru Welsh Water | River Sirhowy | A CSO AT REAR OF CHURCH SQ TREDEGAR | 79 | 250 | 99.8 |
| Dwr Cymru Welsh Water | River Sirhowy | CSO at Tredegar, South of Pochin Crescent | 39 | 233 | 91.1 |
| Dwr Cymru Welsh Water | River Sirhowy | CSO OPP 1 DUKESTOWN ROAD TREDEGAR | 60 | 228 | 99.9 |
| Dwr Cymru Welsh Water | River Sirhowy | CSO Opposite White Lion Cottages | 55 | 199 | 99.3 |
| Dwr Cymru Welsh Water | River Sirhowy | CSO at Tredegar, Edward Terrace Nr River Bridge | 69 | 190 | 99 |
| Dwr Cymru Welsh Water | River Sirhowy | Old Tram Rd CSO, Pontllanfraith | 36 | 112 | 97.2 |
| Dwr Cymru Welsh Water | River Sirhowy | CSO 42 92 Tredegar St Cross Keys | 12 | 83 | 99.9 |
| Dwr Cymru Welsh Water | River Sirhowy | CSO at Tredegar, Railway View, opposite No13 | 52 | 64 | 99.5 |
| Dwr Cymru Welsh Water | River Sirhowy | CSO 16 Woodfield Row Blackwood | 25 | 63 | 99.9 |
| Dwr Cymru Welsh Water | River Sirhowy | Blackwood 100 Steps CSO | 37 | 57 | 97.6 |
| Dwr Cymru Welsh Water | River Sirhowy | WVTS-Tredegar (MH G57) CSO | 21 | 46 | 100 |
| Dwr Cymru Welsh Water | River Sirhowy | CSO at Tredegar, Vale Terrace R/O 101 U/S Garage | 31 | 29 | 92.1 |
| Dwr Cymru Welsh Water | River Sirhowy | CSO at Tredegar, Brompton SSO 1 MH No GN86A | 10 | 27 | 99.7 |
| Dwr Cymru Welsh Water | River Sirhowy | Bottom of Nine Mile Point Colliery CSO | 9 | 26 | 98.5 |
| Dwr Cymru Welsh Water | River Sirhowy | Islwyn Rd CSO, Crosskeys | 7 | 2 | 96.9 |
| Dwr Cymru Welsh Water | River Sirhowy | CSO at Tredegar, Vale Terrace R/O 123 | 2 | 0 | 100 |
| Dwr Cymru Welsh Water | River Sirhowy | Railway Cottages CSO, Cwmfelinfach | 2 | 0 | 100 |
| Dwr Cymru Welsh Water | River Sirhowy | CSO at St James Close Maes-Y-Coed,Tredegar | 0 | 0 | 100 |
| Dwr Cymru Welsh Water | River Sirhowy | CSO at Hollybush - Ancient Druid | 0 | 0 | 0 |
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