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Here are all the reported sewage overflow totals for Swansea Bay 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 | Swansea Bay | BAGLAN SPS BRITON FERRY NEATH | 154 | 1,876 | 99.8 |
| Dwr Cymru Welsh Water | Swansea Bay | AFAN WWTW | 74 | 968 | 99.9 |
| Dwr Cymru Welsh Water | Swansea Bay | AFAN WWTW PHOENIX WHARF HARBOUR RD | 21 | 138 | 75.9 |
| Dwr Cymru Welsh Water | Swansea Bay | OUTFALL A (CSO 201) JUN OF MUMBLES | 13 | 110 | 97.5 |
| Dwr Cymru Welsh Water | Swansea Bay | Duns Lane/Park street CSO | 26 | 105 | 99.7 |
| Dwr Cymru Welsh Water | Swansea Bay | Swansea Waste Water Treatment Works | 10 | 100 | 99.9 |
| Dwr Cymru Welsh Water | Swansea Bay | SWO. NEAR NORTON AVENUE (POINT | 71 | 90 | 98.9 |
| Dwr Cymru Welsh Water | Swansea Bay | ABBEY SPS BRITISH STEEL SITE | 10 | 39 | 99.4 |
| Dwr Cymru Welsh Water | Swansea Bay | OUTFALL D1 (CSO 10) JUN OF MUMBLES | 11 | 5 | 99.9 |
| Dwr Cymru Welsh Water | Swansea Bay | FAIRWOOD RD/LYNDEN TREE P H SWANSEA | 9 | 2 | 98.5 |
| Dwr Cymru Welsh Water | Swansea Bay | Sketty Green CSO | 3 | 2 | 100 |
| Dwr Cymru Welsh Water | Swansea Bay | Storm Overflow at Outfall G via CSO 16 | 2 | 0 | 100 |
| Dwr Cymru Welsh Water | Swansea Bay | OUTFALL E (CSO 14) JUN OF MUMBLES R | 2 | 0 | 99.8 |
| Dwr Cymru Welsh Water | Swansea Bay | OUTFALL K (CSO 264) JUN OF MUMBLES | 1 | 0 | 100 |
| Dwr Cymru Welsh Water | Swansea Bay | OFF LLIPUT LANE POINT 130 CSO SWAN | 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