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Here are all the reported sewage overflow totals for Sirhowy River 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 | Sirhowy River | CSO 20 OLD MILL NEWPORT ROAD | 111 | 1,022 | 99.9 |
| Dwr Cymru Welsh Water | Sirhowy River | Blackwood Cwmgelli CSO | 66 | 205 | 99.4 |
| Dwr Cymru Welsh Water | Sirhowy River | CSO at Tredegar, Vicarage Road Rear of Hill Rest | 56 | 178 | 99.3 |
| Dwr Cymru Welsh Water | Sirhowy River | CSO 19 Gryphonn Concrete Products | 85 | 139 | 99.9 |
| Dwr Cymru Welsh Water | Sirhowy River | Blackwood Oakdale Rhiw Hill CSO | 41 | 105 | 89.2 |
| Dwr Cymru Welsh Water | Sirhowy River | WVTS - Wattsville (Recreation Ground) CSO | 40 | 100 | 94.6 |
| Dwr Cymru Welsh Water | Sirhowy River | CSO 32084 Scwrfa Road, Tredegar | 43 | 96 | 99.9 |
| Dwr Cymru Welsh Water | Sirhowy River | CSO CWM ROAD ARGOED CAERPHILLY | 23 | 71 | 99.7 |
| Dwr Cymru Welsh Water | Sirhowy River | WVTS-WYLLIE HALT SSO | 33 | 53 | 98 |
| Dwr Cymru Welsh Water | Sirhowy River | Tredegar Vale Terrace R/O 61 | 40 | 42 | 99.7 |
| Dwr Cymru Welsh Water | Sirhowy River | Morgan St CSO, Tredegar | 38 | 42 | 99.6 |
| Dwr Cymru Welsh Water | Sirhowy River | Markham Colliery Gun Club CSO | 12 | 10 | 89.3 |
| Dwr Cymru Welsh Water | Sirhowy River | Tredegar Ladies Row CSO o/s School Entrance | 10 | 9 | 99.6 |
| Dwr Cymru Welsh Water | Sirhowy River | CSO AT REAR OF NO1 ALEXANDRA PLACE | 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