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Neath and Swansea East - 2025 Sewage

Polluted by sewage 20,244 hours in 2025 - That's 2.34 years

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

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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 for 2025. It is an estimate, based on very poor quality live data from the Water Companies. This may not align with the 'official' reported sewage values from the water companies, which is reported in April following then end of the year - so 2025 numbers are reported in April 2026.

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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Constituencies near Neath and Swansea East

Daily Data

Jan - 0 hours
Feb - 1,227 hours
Mar - 310 hours
Apr - 401 hours
May - 225 hours
Jun - 903 hours
Jul - 22 hours
Aug - 352 hours
Sept - 3,573 hours
Oct - 1,210 hours
Nov - 4,550 hours
Dec - 7,462 hours
Daily data is experimental and data is not guaranteed to be accurate. Please inform us of any issue, we will fix.
Please note: We don't have rainfall data for Wales. If you know where to source it please let us know!
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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 128 2,450 h 44m -
Dwr Cymru Welsh Water Baglan Sea Storm Overflow Swansea Bay 127 1,699 h 45m -
Dwr Cymru Welsh Water Ynys March Crynant Storm Overflow River Dulais 109 1,377 h 32m -
Dwr Cymru Welsh Water Cwmgwrach WwTW Storm Overflow River Neath 100 1,176 h 38m -
Dwr Cymru Welsh Water Dulais Road Seven Sisters Storm Overflow River Dulais 100 1,067 h 31m -
Dwr Cymru Welsh Water Clydach Bridge Street Storm Overflow River Tawe 92 956 h 44m -
Dwr Cymru Welsh Water Onllwyn Storm Overflow Afon Camnant 93 945 h 45m -
Dwr Cymru Welsh Water Dynevor Junction Storm Overflow Neath Estuary 94 856 h 35m -
Dwr Cymru Welsh Water Swansea Fabian Way Storm Overflow The Neath Estuary 55 856 h -
Dwr Cymru Welsh Water Fairfield Neath Storm Overflow Estuarial Waters of Afon Nedd 78 644 h 49m -
Dwr Cymru Welsh Water Moses Row Storm Overflow Melin Court Brook 58 588 h 25m -
Dwr Cymru Welsh Water Resolven WwTW Storm Overflow River Neath 62 587 h 16m -
Dwr Cymru Welsh Water High Street Gellidawel Road Storm Overflow River Neath 96 443 h 17m -
Dwr Cymru Welsh Water Chain Road Storm Overflow River Neath 55 429 h 32m -
Dwr Cymru Welsh Water Clyne Near Twrch Brook Storm Overflow River Neath 40 398 h 8m -
Dwr Cymru Welsh Water Melincryddan Neat Storm Overflow Estuarial Waters of Afon Nedd 63 357 h 15m -
Dwr Cymru Welsh Water Samlet Road Storm Overflow Nant-Y-Fendrod 44 350 h 12m -
Dwr Cymru Welsh Water Farmers Road Storm Overflow River Clydach 62 348 h 45m -
Dwr Cymru Welsh Water Neath Abbey Ruins Southeast Storm Overflow River Clydach 66 348 h 15m -
Dwr Cymru Welsh Water Walters Road Llansamlet Storm Overflow Nant Bran 40 323 h 44m -
Dwr Cymru Welsh Water Pentre Chwyth Kilvey Hill Storm Overflow River Tawe 44 314 h 42m -
Dwr Cymru Welsh Water Godfrey Avenue Rear Storm Overflow River Neath 70 257 h -
Dwr Cymru Welsh Water Main Road Heol Ty Gwyn Storm Overflow River Clydach 70 234 h 55m -
Dwr Cymru Welsh Water Hebron Road Storm Overflow Lower Afon Clydach 48 233 h 4m -
Dwr Cymru Welsh Water Neath Penrhiwtyn Storm Overflow Tributary of River Clydach 39 233 h -
Dwr Cymru Welsh Water Old Road Skewen Storm Overflow Tennant Canal 68 226 h 15m -
Dwr Cymru Welsh Water Heol Hendre Bryncoch Storm Overflow Tributary of Afon Clydach 42 202 h 45m -
Dwr Cymru Welsh Water Heol Eithrym Storm Overflow Lower Afon Clydach 25 154 h 18m -
Dwr Cymru Welsh Water Dulais Fach Road Storm Overflow River Neath 65 150 h 36m -
Dwr Cymru Welsh Water Station Road Glais Storm Overflow River Tawe 29 122 h 35m -
Dwr Cymru Welsh Water Glais Swansea Overflow River Tawe 29 122 h 35m -
Dwr Cymru Welsh Water Bryndulais Avenue Seven Sisters No 2 Storm Overflow River Dulais 36 120 h 12m -
Dwr Cymru Welsh Water Peniel Green Road Storm Overflow Tributary of Nant-Bran 29 114 h 38m -
Dwr Cymru Welsh Water Main Road Aberdulais No2 Storm Overflow Tributary of Tennant Canal 26 111 h 54m -
Dwr Cymru Welsh Water Neath Quay Road Storm Overflow Estuarial Waters of the River Neath 55 103 h -
Dwr Cymru Welsh Water Plas Y Coed Storm Overflow River Neath 40 101 h 9m -
Dwr Cymru Welsh Water Gnoll Park Road Storm Overflow River Neath 55 97 h 30m -
Dwr Cymru Welsh Water Bethel Road Glynneath Storm Overflow River Neath 27 89 h 45m -
Dwr Cymru Welsh Water Pentreffynnon Storm Overflow Estuarial Waters of Afon Nedd 35 84 h 45m -
Dwr Cymru Welsh Water Baldwins Crescent Overflow Coastal Waters - Swansea Bay 31 72 h 17m -
Dwr Cymru Welsh Water Main Road Bryncoch Storm Overflow Tributary of River Clydach 14 63 h -
Dwr Cymru Welsh Water Bonymaen Road No. 1 Storm Overflow River Tawe 32 57 h 33m -
Dwr Cymru Welsh Water Aberdulais Storm Overflow Neath Estuary 21 56 h 45m -
Dwr Cymru Welsh Water Bonymaen Road No. 2 Storm Overflow River Tawe 31 55 h 19m -
Dwr Cymru Welsh Water Lonlas Storm Overflow Crymlyn Brook 14 51 h 30m -
Dwr Cymru Welsh Water Roman Way Neath Storm Overflow River Neath 21 51 h 13m -
Dwr Cymru Welsh Water Llandarcy Outfall Storm Overflow Estuarial Waters Of The River Neath 28 48 h 55m -
Dwr Cymru Welsh Water Llantwit Road Neath Storm Overflow Estuarial Waters of Llantwit Stream 19 47 h 30m -
Dwr Cymru Welsh Water Ynys y Mond Road Swansea Overflow River Tawe 21 44 h 25m -
Dwr Cymru Welsh Water Longford Road Storm Overflow Tributary of Afon Clydach 13 39 h 11m -
Dwr Cymru Welsh Water Monastery Road Storm Overflow River Clydach 12 34 h 52m -
Dwr Cymru Welsh Water Swansea Bay WwTW Storm Overflow Swansea Bay 2 31 h -
Dwr Cymru Welsh Water Cimla Road Gnoll Brook Storm Overflow Gnoll Brook 11 27 h 25m -
Dwr Cymru Welsh Water Elba Crescent Swansea Overflow Swansea Bay 8 27 h 15m -
Dwr Cymru Welsh Water Stanley Place Storage Storm Overflow Tributary of Tennant Canal 7 26 h 45m -
Dwr Cymru Welsh Water Halfway Pentre-Dwr Storm Overflow Tributary of Crymlyn Bog 9 26 h -
Dwr Cymru Welsh Water Heol Illtyd Storm Overflow River Neath 7 25 h 30m -
Dwr Cymru Welsh Water Main Road Aberdulais No.1 Storm Overflow River Dulais 8 24 h 56m -
Dwr Cymru Welsh Water B4434 Roundabout Resolven Storm Overflow River Neath 21 19 h 9m -
Dwr Cymru Welsh Water Neath Hillside Lane Storm Overflow Eastland Brook 19 18 h 5m -
Dwr Cymru Welsh Water Heol Dulais Birchgrove Storm Overflow Nant Bran 7 17 h 46m -
Dwr Cymru Welsh Water Drummau Road Storm Overflow Nant-Y-Fendrod 9 16 h 45m -
Dwr Cymru Welsh Water Birchgrove Road Storm Overflow Surface Water Culvert leading to Nant Bran 10 16 h 18m -
Dwr Cymru Welsh Water Cimla Common Storm Overflow Hollins Clough Ditch 4 15 h 51m -
Dwr Cymru Welsh Water Heol Tonmaen Storm Overflow River Neath 13 12 h 48m -
Dwr Cymru Welsh Water Cardonnel Road Storm Overflow River Neath 1 10 h 45m -
Dwr Cymru Welsh Water Bethel Road Llansamlet Storm Overflow Tributary of Nant-Bran 5 7 h 42m -
Dwr Cymru Welsh Water Unknown Unknown 1 5 h 15m -
Dwr Cymru Welsh Water Trallwn Community Centre Storm Overflow Nant Bran 6 3 h 13m -
Dwr Cymru Welsh Water Dulais Fach Road Junction Storm Overflow Tributary of Neath Canal 5 2 h 11m -
Dwr Cymru Welsh Water Fabian Way Swansea Storm Overflow Estuarial Waters of Swansea Bay 5 1 h 29m -
Dwr Cymru Welsh Water Dyfed Road Neath Storm Overflow River Neath 5 1 h 14m -
Dwr Cymru Welsh Water Unknown Unknown 3 0 h 45m -
Dwr Cymru Welsh Water Quarr Rd Storm Overflow River Tawe 2 0 h 45m -
Dwr Cymru Welsh Water Heol-Y-Nant Sybil Street Storm Overflow River Tawe 2 0 h 30m -
Dwr Cymru Welsh Water Heol Las Storm Overflow Nant Y Fendrod 1 0 h 15m -
Dwr Cymru Welsh Water Bryndulais Avenue Seven Sisters No1 Storm Overflow River Dulais 0 0 h -
Dwr Cymru Welsh Water Cadoxton Road Storm Overflow River Neath 0 0 h -
Dwr Cymru Welsh Water Caenant Terrace Storm Overflow Tennant Canal 0 0 h -

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

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.

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© 2020-2025 Top-Of-The-Poops CC-BY-SA 4.0,
© Openstreetmap contributors, Contains OS data © Crown copyright and database right 2021-2025,
Contains Water UK National Storm Overflow Hub Data CC-BY-SA 4.0 and analysis © 2025 Top-Of-The-Poops

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