Swansea Bay polluted by sewage 470 times in 2022 - lasting 2,498 hours

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Contains OS Data © Crown copyright & database right 2021-2022
© Top of the Poops 2021-2023
Totals for Swansea Bay in 2022
18 Sites polluted by Dwr Cymru Welsh Water
470 sewage dumps
2,498 h duration
That's 3.47 months. On average 1.3 times a day
How does Swansea Bay compare?

Swansea Bay was the #13 most polluted bathing area in England & Wales, by duration of sewage overflows, as reported by the water companies

Local Constituency

Pollution Summary 2022

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 Nant Bran Via Culvert Trallwyn Community Centre CSO 0 0 100
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

Data Sources & Accuracy

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.