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Here are all the reported sewage overflow totals for River Clydach 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 Clydach | BRYNMAWR STW BLACKROCK BRYNMAWR | 122 | 1,583 | 99.9 |
| Dwr Cymru Welsh Water | River Clydach | Maesygwartha SPS and CSO | 92 | 1,031 | 99.8 |
| Dwr Cymru Welsh Water | River Clydach | Neath Abbey SPS | 88 | 384 | 96 |
| Dwr Cymru Welsh Water | River Clydach | CSO 27 Farmers Road Pumping Station | 68 | 382 | 99.9 |
| Dwr Cymru Welsh Water | River Clydach | CSO NO 10 30M U/S ROADBRIDGE | 82 | 214 | 99.3 |
| Dwr Cymru Welsh Water | River Clydach | Rear No 1 Dyffryn V'W Bryn Coch CSO | 53 | 211 | 99.9 |
| Dwr Cymru Welsh Water | River Clydach | Opp Bridge End Inn CSO | 44 | 94 | 99 |
| Dwr Cymru Welsh Water | River Clydach | CSO 8 Bryncoch 7B Bryncoch | 15 | 64 | 99.9 |
| Dwr Cymru Welsh Water | River Clydach | Longford Road Neath Abbey CSO | 14 | 32 | 99.8 |
| Dwr Cymru Welsh Water | River Clydach | Glangrwyney Rd CSO, Gilwern | 28 | 31 | 99.5 |
| Dwr Cymru Welsh Water | River Clydach | Monastery Road Cso (Cso 35) Neath | 14 | 20 | 86.8 |
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