Analysing sewage pollution by the Water Industry
With generous support from:
Swansea Bay was the #13 most polluted bathing area in England & Wales, by duration of sewage overflows, as reported by the water companies
Here are all the reported sewage overflow totals for Swansea Bay in 2022.
If the locations of the sewage outlets look a bit unusual, it is likely that the reporting of the data from the water company is in error. We rely on their data in order to draw these maps.
Accuracy Warning We use data from the water companies, but we are seeing many anomalies, that make us believe that bathing location information is quite poor. The situation is likely far worse than reported here.
Other CSOs may also be located nearby, however the water companies claim that these do not affect the water quality here.
| Company | Waterway | Site | Sewage Dumps | Duration (Hours) | Reporting % |
|---|---|---|---|---|---|
| Dwr Cymru Welsh Water | Swansea Bay | Afan Wastewater Treatment Works Settled Storm Overflow | 124 | 1,424 | 99.9 |
| Dwr Cymru Welsh Water | An River Llan | BLAEN Y MAES POINT 65 CSO SWANSEA | 37 | 317 | 99.6 |
| Dwr Cymru Welsh Water | River Tawe | CSO Ynysforgan Roundabout | 37 | 295 | 100 |
| Dwr Cymru Welsh Water | River Clyne | Byng Morris Close CSO | 40 | 102 | 99 |
| Dwr Cymru Welsh Water | Swansea Bay | Sketty Green CSO | 25 | 102 | 96.8 |
| Dwr Cymru Welsh Water | Nant Bran | Peniel Green Road CSO | 27 | 82 | 100 |
| Dwr Cymru Welsh Water | Estuarial Waters Of Swansea Ba | CSO 121 at Sandfields SPS (Outfall 'L') | 36 | 44 | 100 |
| Dwr Cymru Welsh Water | River Llan | Skomer Place CSO, Blaen Y Maes | 26 | 35 | 99.9 |
| Dwr Cymru Welsh Water | River Clyne | Furzeland Drive CSO | 31 | 25 | 99.7 |
| Dwr Cymru Welsh Water | River Lliw | GORSEINON 2 S121 BAKO CSO GORSEINON | 7 | 16 | 99.6 |
| Dwr Cymru Welsh Water | Unnamed Stream To Loughor Estu | CSO Brynafon Road | 8 | 14 | 75.7 |
| Dwr Cymru Welsh Water | River Llan | CSO, Denver R’D Into Culvert Swansea | 17 | 14 | 100 |
| Dwr Cymru Welsh Water | Brynmill Stream | Singleton Park Point 24 CSO | 16 | 9 | 100 |
| Dwr Cymru Welsh Water | River Llan | Station Road CSO, Pen Y Cwm Swansea | 21 | 8 | 98.8 |
| Dwr Cymru Welsh Water | River Llan Via Surface Water Sewer | Cadle Common CSO | 7 | 4 | 99.9 |
| Dwr Cymru Welsh Water | Surface Water Culvert, An Nant Bran | Birchgrove Road CSO | 7 | 1 | 100 |
| Dwr Cymru Welsh Water | River Clyne | Sketty Park Drive CSO | 3 | 1 | 100 |
| Dwr Cymru Welsh Water | Nant Y Fendrod - Headwaters To Conf With Tawe | Birchgrove CSO | 1 | 0 | 99.9 |
| Dwr Cymru Welsh Water | Loughour Estuary | Ben Hughes Foundry CSO | 0 | 0 | 0 |
| Dwr Cymru Welsh Water | River Llan | Camarthen Rd CSO | 0 | 0 | 100 |
| Dwr Cymru Welsh Water | Swansea Bay | Cricketers CSO | 0 | 0 | 99.8 |
| Dwr Cymru Welsh Water | Nant Bran Via Culvert | Trallwyn Community Centre CSO | 0 | 0 | 100 |
EDM (Event Duration Monitoring) data and Consented Discharges to Controlled Waters with Conditions from Environment Agency & Data Map Wales
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.
Analysing sewage pollution by the Water Industry
With generous support from: