It's a Dirty Business

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Neath and Swansea East - Live Sewage

Polluted by sewage 12,083 hours in 2026 - That's 1.4 years so far..

© OpenStreetMap contributors
Contains OS Data © Crown copyright & database right 2021-2024
© Top of the Poops 2021-2024

Which Year?

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View Annual Sewage Data

You're looking at the totals that we have calculated for sewage in Neath and Swansea East so far for 2026. It is an estimate, based on very poor quality live data from the Water Companies. The water companies report their sewage to the Environment Agency every year in April. You can see the last reported year in the other page

What's a potential overflow? If the CSO goes 'Offline' while its Overflowing, we don't know if it stopped overflowing until we get a 'Stop' event.

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Daily Data

Jan - 2,418 hours
Feb - 3,293 hours
Mar - 1,232 hours
Apr - 288 hours
May - 1,997 hours
Jun - 2,557 hours
Jul - 0 hours
Aug - 148 hours
Sept - 146 hours
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Totals so far

Company Site Name Receiving Waterway Overflow Days Total Duration (hours) Offline/Potential Pollution
Dwr Cymru Welsh Water Crynant WwTW Storm Overflow River Dulais 123 2,498h -
Dwr Cymru Welsh Water Baglan Sea Storm Overflow Swansea Bay 137 2,325h 21m -
Dwr Cymru Welsh Water Ynys March Crynant Storm Overflow River Dulais 100 1,545h 45m -
Dwr Cymru Welsh Water Cwmgwrach WwTW Storm Overflow River Neath 91 1,357h 40m -
Dwr Cymru Welsh Water Clydach Bridge Street Storm Overflow River Tawe 77 986h 9m -
Dwr Cymru Welsh Water Dulais Road Seven Sisters Storm Overflow River Dulais 63 692h 32m -
Dwr Cymru Welsh Water Swansea Fabian Way Storm Overflow The Neath Estuary 31 480h 30m -
Dwr Cymru Welsh Water Heol Tonmaen Storm Overflow River Neath 17 365h 14m -
Dwr Cymru Welsh Water Chain Road Storm Overflow River Neath 32 304h 10m -
Dwr Cymru Welsh Water Onllwyn Storm Overflow Afon Camnant 38 200h 43m -
Dwr Cymru Welsh Water Dynevor Junction Storm Overflow Neath Estuary 35 163h 33m -
Dwr Cymru Welsh Water Fairfield Neath Storm Overflow Estuarial Waters of Afon Nedd 33 131h 32m -
Dwr Cymru Welsh Water Moses Row Storm Overflow Melin Court Brook 20 128h 58m -
Dwr Cymru Welsh Water Resolven WwTW Storm Overflow River Neath 31 124h 31m -
Dwr Cymru Welsh Water Melincryddan Neat Storm Overflow Estuarial Waters of Afon Nedd 26 81h 44m -
Dwr Cymru Welsh Water Main Road Heol Ty Gwyn Storm Overflow River Clydach 34 76h 37m -
Dwr Cymru Welsh Water High Street Gellidawel Road Storm Overflow River Neath 28 73h 57m -
Dwr Cymru Welsh Water Godfrey Avenue Rear Storm Overflow River Neath 33 72h 14m -
Dwr Cymru Welsh Water Neath Abbey Ruins Southeast Storm Overflow River Clydach 20 57h 15m -
Dwr Cymru Welsh Water Farmers Road Storm Overflow River Clydach 16 54h 28m -
Dwr Cymru Welsh Water Llantwit Road Neath Storm Overflow Estuarial Waters of Llantwit Stream 10 49h 30m -
Dwr Cymru Welsh Water Hebron Road Storm Overflow Lower Afon Clydach 20 43h 13m -
Dwr Cymru Welsh Water Old Road Skewen Storm Overflow Tennant Canal 19 40h 14m -
Dwr Cymru Welsh Water Walters Road Llansamlet Storm Overflow Nant Bran 9 31h -
Dwr Cymru Welsh Water Bryndulais Avenue Seven Sisters No 2 Storm Overflow River Dulais 12 29h 14m -
Dwr Cymru Welsh Water Dulais Fach Road Storm Overflow River Neath 22 26h 7m -
Dwr Cymru Welsh Water Samlet Road Storm Overflow Nant-Y-Fendrod 7 21h 50m -
Dwr Cymru Welsh Water Baldwins Crescent Overflow Coastal Waters - Swansea Bay 9 15h 29m -
Dwr Cymru Welsh Water Plas Y Coed Storm Overflow River Neath 9 11h 7m -
Dwr Cymru Welsh Water Neath Quay Road Storm Overflow Estuarial Waters of the River Neath 12 10h 14m -
Dwr Cymru Welsh Water Bonymaen Road No. 1 Storm Overflow River Tawe 8 9h 56m -
Dwr Cymru Welsh Water Heol Hendre Bryncoch Storm Overflow Tributary of Afon Clydach 6 7h 44m -
Dwr Cymru Welsh Water Peniel Green Road Storm Overflow Tributary of Nant-Bran 2 7h 14m -
Dwr Cymru Welsh Water Roman Way Neath Storm Overflow River Neath 2 6h 45m -
Dwr Cymru Welsh Water Station Road Glais Storm Overflow River Tawe 3 6h 44m -
Dwr Cymru Welsh Water Bonymaen Road No. 2 Storm Overflow River Tawe 8 6h 11m -
Dwr Cymru Welsh Water Neath Penrhiwtyn Storm Overflow Tributary of River Clydach 1 5h 30m -
Dwr Cymru Welsh Water Elba Crescent Swansea Overflow Swansea Bay 3 5h 29m -
Dwr Cymru Welsh Water Gnoll Park Road Storm Overflow River Neath 9 5h 27m -
Dwr Cymru Welsh Water Main Road Bryncoch Storm Overflow Tributary of River Clydach 1 5h -
Dwr Cymru Welsh Water Pentre Chwyth Kilvey Hill Storm Overflow River Tawe 7 3h 15m -
Dwr Cymru Welsh Water Bethel Road Glynneath Storm Overflow River Neath 4 3h 15m -
Dwr Cymru Welsh Water Heol Dulais Birchgrove Storm Overflow Nant Bran 1 1h 59m -
Dwr Cymru Welsh Water Monastery Road Storm Overflow River Clydach 2 1h 37m -
Dwr Cymru Welsh Water Aberdulais Storm Overflow Neath Estuary 4 1h 30m -
Dwr Cymru Welsh Water Pentreffynnon Storm Overflow Estuarial Waters of Afon Nedd 1 1h 29m -
Dwr Cymru Welsh Water B4434 Roundabout Resolven Storm Overflow River Neath 2 0h 45m -
Dwr Cymru Welsh Water Neath Hillside Lane Storm Overflow Eastland Brook 2 0h 42m -
Dwr Cymru Welsh Water Llandarcy Outfall Storm Overflow Estuarial Waters Of The River Neath 1 0h 30m -
Dwr Cymru Welsh Water Trallwn Community Centre Storm Overflow Nant Bran 1 0h 30m -
Dwr Cymru Welsh Water Cimla Road Gnoll Brook Storm Overflow Gnoll Brook 1 0h 29m -
Dwr Cymru Welsh Water Lonlas Storm Overflow Crymlyn Brook 1 0h 29m -
Dwr Cymru Welsh Water Birchgrove Road Storm Overflow Surface Water Culvert leading to Nant Bran 1 0h 29m -
Dwr Cymru Welsh Water Stanley Place Storage Storm Overflow Tributary of Tennant Canal 1 0h 15m -
Dwr Cymru Welsh Water Main Road Aberdulais No2 Storm Overflow Tributary of Tennant Canal 1 0h 15m -
Dwr Cymru Welsh Water Clyne Near Twrch Brook Storm Overflow River Neath 1 0h 15m -
Dwr Cymru Welsh Water Ynys y Mond Road Swansea Overflow River Tawe 1 0h 14m -
Dwr Cymru Welsh Water Heol Eithrym Storm Overflow Lower Afon Clydach 1 0h 13m -
Dwr Cymru Welsh Water Halfway Pentre-Dwr Storm Overflow Tributary of Crymlyn Bog 0 0h -
Dwr Cymru Welsh Water Heol Illtyd Storm Overflow River Neath 0 0h -
Dwr Cymru Welsh Water Dwr Y Felin Road Storm Overflow Estuarial Waters of Afon Nedd 0 0h -
Dwr Cymru Welsh Water Unknown Unknown 0 0h -
Dwr Cymru Welsh Water Dulais Fach Road Junction Storm Overflow Tributary of Neath Canal 0 0h -
Dwr Cymru Welsh Water Swansea Bay WwTW Storm Overflow Swansea Bay 0 0h -
Dwr Cymru Welsh Water Dyfed Road Neath Storm Overflow River Neath 0 0h -
Dwr Cymru Welsh Water Bryndulais Avenue Seven Sisters No1 Storm Overflow River Dulais 0 0h -
Dwr Cymru Welsh Water Cardonnel Road Storm Overflow River Neath 0 0h -
Dwr Cymru Welsh Water Bethel Road Llansamlet Storm Overflow Tributary of Nant-Bran 0 0h -
Dwr Cymru Welsh Water Cimla Common Storm Overflow Hollins Clough Ditch 0 0h -
Dwr Cymru Welsh Water Main Road Aberdulais No.1 Storm Overflow River Dulais 0 0h -
Dwr Cymru Welsh Water Glais Swansea Overflow River Tawe 0 0h -
Dwr Cymru Welsh Water Heol Las Storm Overflow Nant Y Fendrod 0 0h -
Dwr Cymru Welsh Water Fabian Way Swansea Storm Overflow Estuarial Waters of Swansea Bay 0 0h -
Dwr Cymru Welsh Water Caenant Terrace Storm Overflow Tennant Canal 0 0h -
Dwr Cymru Welsh Water Unknown Unknown 0 0h -
Dwr Cymru Welsh Water Cadoxton Road Storm Overflow River Neath 0 0h -
Dwr Cymru Welsh Water Longford Road Storm Overflow Tributary of Afon Clydach 0 0h -
Dwr Cymru Welsh Water Heol-Y-Nant Sybil Street Storm Overflow River Tawe 0 0h -
Dwr Cymru Welsh Water Quarr Rd Storm Overflow River Tawe 0 0h -
Dwr Cymru Welsh Water Drummau Road Storm Overflow Nant-Y-Fendrod 0 0h -

Data Sources & Accuracy

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.