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Here are all the reported sewage overflow totals for River Taff in 2024. Sometimes sewage can be being dumped for months at a time.
These numbers are very slightly different from the Rivers page. We're working on it.
| Company | Waterway | Site | Sewage Dumps | Duration (Hours) | Reporting % |
|---|---|---|---|---|---|
| Dwr Cymru Welsh Water | River Taff | Cilfynydd STW Cilfynydd Pontypridd Settled Storm | 157 | 2,597 | 99.8 |
| Dwr Cymru Welsh Water | River Taff | Tongwynlais CSO | 121 | 1,936 | 89.2 |
| Dwr Cymru Welsh Water | River Taff | Settled Storm at Cynon Valley Wastewater Treatment Works | 106 | 1,586 | 99.8 |
| Dwr Cymru Welsh Water | River Taff | Tonteg Road, Upper Boat CSO and Pumping Station Emergency Overflow | 150 | 1,107 | 99.8 |
| Dwr Cymru Welsh Water | River Taff | CYNON VALLEY STW GLYNCOCH PONTY | 50 | 776 | 99.8 |
| Dwr Cymru Welsh Water | River Taff | Abercynon Wood Rd SPS | 85 | 639 | 99.7 |
| Dwr Cymru Welsh Water | River Taff | Hermon Wastewater Treatment Works | 32 | 629 | 100 |
| Dwr Cymru Welsh Water | River Taff | CASTLE INN CSO ASSET NO 32280 | 109 | 537 | 98.5 |
| Dwr Cymru Welsh Water | River Taff | Ynys Bridge CSO | 43 | 362 | 98.7 |
| Dwr Cymru Welsh Water | River Taff | A CSO AT JACKSONS BRIDGE | 93 | 347 | 99.8 |
| Dwr Cymru Welsh Water | River Taff | YNYSANGHARAD PARK CSO | 97 | 252 | 99.8 |
| Dwr Cymru Welsh Water | River Taff | CSO COLLEGE CAR PK MERTHYR TYDFIL | 53 | 236 | 99.8 |
| Dwr Cymru Welsh Water | River Taff | Merthyr Tydfil Georgetown Lines Bridge CSO | 36 | 192 | 82.7 |
| Dwr Cymru Welsh Water | River Taff | Gellideg Tai Mawr Rd CSO, Merthyr Tydfil | 50 | 191 | 99.4 |
| Dwr Cymru Welsh Water | River Taff | Rhydfelin CSO Off Lionel Terrace | 33 | 173 | 98.8 |
| Dwr Cymru Welsh Water | River Taff | Quakers Yard CSO, Fiddlers Elbow St, Cynon | 30 | 161 | 99.1 |
| Dwr Cymru Welsh Water | River Taff | Quakers Yard CSO, Greenfield Victoria Bridge | 34 | 156 | 46.6 |
| Dwr Cymru Welsh Water | River Taff | Crossbrook St CSO, Pontypridd | 50 | 122 | 94.9 |
| Dwr Cymru Welsh Water | River Taff | CSO Avenue De Clichy, Merthyr | 26 | 53 | 99.8 |
| Dwr Cymru Welsh Water | River Taff | Pontypridd West Street CSO | 49 | 24 | 98.9 |
| Dwr Cymru Welsh Water | River Taff | Cardiff Wood St/Havelock St Jn CSO | 23 | 19 | 99 |
| Dwr Cymru Welsh Water | River Taff | TROEDYRHIW PS | 4 | 11 | 99 |
| Dwr Cymru Welsh Water | River Taff | Park Street PS | 12 | 8 | 99.8 |
| Dwr Cymru Welsh Water | River Taff | Phyllis Street CSO, Troedyrhiw | 6 | 8 | 99.7 |
| Dwr Cymru Welsh Water | River Taff | YNYSANGHARAD HIGH LEVEL RELIEF CSO | 2 | 4 | 99.4 |
| Dwr Cymru Welsh Water | River Taff | Sion Street Sewage Pumping Station | 1 | 2 | 99.8 |
| Dwr Cymru Welsh Water | River Taff | CSO WILLOW GAS WORKS MERTHYR TYDFIL | 2 | 1 | 94.3 |
| Dwr Cymru Welsh Water | River Taff | 3rd Trunk CSO South of Glan Yr Afon | 3 | 1 | 20.9 |
| Dwr Cymru Welsh Water | River Taff | Troedyrhiw, Yew Street CSO | 2 | 0 | 31.5 |
| Dwr Cymru Welsh Water | River Taff | Taff St CSO, Pontypridd | 2 | 0 | 94.9 |
| Dwr Cymru Welsh Water | River Taff | TRUNK CSO 2A OFF ABERFAN ROAD | 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. This 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