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Polluted by sewage 310 times in 2025 lasting 1,004 hours
Monitoring was disabled in some locations, so could be more
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Donate NowHere are all the reported sewage overflow totals for Aberpennar in 2025. 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 place 1 of the total 12 CSO Combined Sewage Overflow - a device that, when operating, pours combined rainwater & sewage into a waterway locations had reporting enabled for less than half the year. Of these 1 had zero reporting.
| Company | Waterway | Site | Sewage Dumps | Duration (Hours) | Reporting % |
|---|---|---|---|---|---|
| Dwr Cymru Welsh Water | River Cynon | Oxford St CSO, Mountain Ash | 85 | 434 | 95.5 |
| Dwr Cymru Welsh Water | River Cynon | CSO Opposite Miskin Hotel, far side of railway | 68 | 300 | 82.2 |
| Dwr Cymru Welsh Water | River Cynon | Glassbrook Terrace CSO, Penrhiwceiber | 48 | 124 | 99.2 |
| Dwr Cymru Welsh Water | River Cynon | NEWTOWN COMMUNITY HALL CSO | 32 | 63 | 99.7 |
| Dwr Cymru Welsh Water | R Cynon - Conf Aman R To Conf R Taff | Station Terrace CSO, Penrhiwceiber | 30 | 38 | 80.1 |
| Dwr Cymru Welsh Water | River Cynon | Penrhiwceiber Point D CSO | 29 | 30 | 99.7 |
| Dwr Cymru Welsh Water | River Cynon | Cwmpennar CSO, Adj Low Rd, Mountain Ash | 5 | 8 | 94.2 |
| Dwr Cymru Welsh Water | River Cynon | Abercwmboi Parkview Capcoch Infant School CSO | 7 | 3 | 100 |
| Dwr Cymru Welsh Water | River Cynon | TOWN HALL | 4 | 1 | 99.9 |
| Dwr Cymru Welsh Water | River Cynon | CSO at Cwmbach Bryngolwg No 45 | 2 | 0 | 99.9 |
| Dwr Cymru Welsh Water | River Cynon | Duffryn Rd Mount 2 CSO | 0 | 0 | 0 |
| Dwr Cymru Welsh Water | River Cynon | No 10 Hamilton St CSO, Mountain Ash | 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. 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