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Here are all the reported sewage overflow totals for River Rhondda Fach 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 Rhondda Fach | Ferndale Road CSO Tylorstown RCT | 86 | 903 | 99.4 |
| Dwr Cymru Welsh Water | River Rhondda Fach | R/O Tylorstown Primary School CSO, Tylorstown | 115 | 868 | 98.1 |
| Dwr Cymru Welsh Water | River Rhondda Fach | Rear of Fir St CSO, Ferndale | 114 | 794 | 98.9 |
| Dwr Cymru Welsh Water | River Rhondda Fach | Ferndale Banana Tip CSO Additional | 82 | 555 | 89.3 |
| Dwr Cymru Welsh Water | River Rhondda Fach | CSO OPP 37 EDMONDES ST TYLORSTOWN | 63 | 376 | 99.4 |
| Dwr Cymru Welsh Water | River Rhondda Fach | CSO at CROSS STREET YNYSHIR R-C-T | 99 | 348 | 99.9 |
| Dwr Cymru Welsh Water | River Rhondda Fach | Rear of Blake St CSO, Maerdy | 77 | 337 | 96.9 |
| Dwr Cymru Welsh Water | River Rhondda Fach | Station Rd CSO, Ferndale | 97 | 278 | 99 |
| Dwr Cymru Welsh Water | River Rhondda Fach | FERNDALE BANANA TIP CSO | 75 | 260 | 98.7 |
| Dwr Cymru Welsh Water | River Rhondda Fach | Aberrhondda Road CSO | 62 | 247 | 98.3 |
| Dwr Cymru Welsh Water | River Rhondda Fach | Ferndale Banana Tip No.1 CSO | 22 | 212 | 23.1 |
| Dwr Cymru Welsh Water | River Rhondda Fach | Highfield Industrial Estate CSO, Ferndale | 63 | 209 | 97.8 |
| Dwr Cymru Welsh Water | River Rhondda Fach | Maerdy Station Road CSO | 44 | 127 | 99.5 |
| Dwr Cymru Welsh Water | River Rhondda Fach | CSO at Wattstown-Bailey St Land Recla | 15 | 35 | 71.1 |
| Dwr Cymru Welsh Water | River Rhondda Fach | Blaenllechau Long Row CSO | 14 | 33 | 80.5 |
| Dwr Cymru Welsh Water | River Rhondda Fach | James Terrace CSO | 8 | 10 | 99.9 |
| Dwr Cymru Welsh Water | River Rhondda Fach | CSO at Ferndale btw Taff St & Station Rd | 1 | 0 | 100 |
| Dwr Cymru Welsh Water | River Rhondda Fach | Blaenllechau Taff St CSO | 0 | 0 | 99.7 |
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