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Wrexham - Live Sewage

Polluted by sewage 1,652 hours in 2026 so far..

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

Which Year?

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✔ means we have live data (𝑥 if not)

View Annual Sewage Data

You're looking at the totals that we have calculated for sewage in Wrexham 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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Constituencies near Wrexham

Daily Data

Jan - 298 hours
Feb - 1,231 hours
Mar - 106 hours
Apr - 10 hours
May - 4 hours
Jun - 0 hours
Jul - 0 hours
Aug - 0 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 Bangor on Dee WwTW Storm Overflow River Dee 34 441h 2m -
Dwr Cymru Welsh Water Marchwiel near Wrexham WwTW Storm Overflow Afon Clywedog 22 263h 5m -
Dwr Cymru Welsh Water Heol Penyfelin Nant Storm Overflow Afon Clywedog 22 176h 45m -
Dwr Cymru Welsh Water Ffordd Treftadaeth Wrexham Overflow River Gwenfro 22 155h 2m -
Dwr Cymru Welsh Water Holt WwTW Storm Overflow River Dee 26 137h 11m -
Dwr Cymru Welsh Water Gresford WwTW Storm Overflow River Alyn 16 135h -
Dwr Cymru Welsh Water Penley Hospital Storm Overflow Ermal Brook 14 77h 15m -
Dwr Cymru Welsh Water Maelor Way Overton WwTW Storm Overflow River Dee 17 43h 30m -
Dwr Cymru Welsh Water Holland Road Brymbo Storm Overflow Tributary of Nant Brook 6 35h 15m -
Dwr Cymru Welsh Water Pandy Overflow River Alun 21 35h -
Dwr Cymru Welsh Water Llay Singrett Storm Overflow Singret Brook 15 33h -
Dwr Cymru Welsh Water Heol Llewelyn Coedpoeth Storm Overflow River Gwenfro 5 31h 46m -
Dwr Cymru Welsh Water Cherry Tree Road Bradley Storm Overflow River Alyn 10 18h 8m -
Dwr Cymru Welsh Water Tanyfron Road Southsea Storm Overflow River Gwenfro 3 14h -
Dwr Cymru Welsh Water Llwyn Onn Estate Wrexham Storm Overflow Unnamed Tributary of Afon Clywedog 8 12h 15m -
Dwr Cymru Welsh Water Chester Road Pulford Storm Overflow Pulford Brook 3 11h 29m -
Dwr Cymru Welsh Water Maesgwyn Road Wrexham Storm Overflow River Gwenfro 31 10h 38m -
Dwr Cymru Welsh Water Overton Wrexham WwTW Overflow River Dee 1 10h 30m -
Dwr Cymru Welsh Water Queens Way Wrexham Storm Overflow River Gwenfro 2 2h 45m -
Dwr Cymru Welsh Water Pen Y Llyn Gwersyllt Storm Overflow Gwersyllt Fishpond 3 2h 30m -
Dwr Cymru Welsh Water Church Road Minera Storm Overflow Afon Clywedog 2 2h 15m -
Dwr Cymru Welsh Water Rossett Level Crossing Storm Overflow River Alyn 2 2h 11m -
Dwr Cymru Welsh Water Ruthin Road Gegin Storm Overflow River Gwenfro 2 0h 59m -
Dwr Cymru Welsh Water Cefn Y Bedd Storm Overflow River Alyn 2 0h 22m -
Dwr Cymru Welsh Water Caer Estyn Storm Overflow Tributary to Pulford Brook 1 0h 15m -
Dwr Cymru Welsh Water Pandy Storm Overflow River Alyn 0 0h -
Dwr Cymru Welsh Water Yorke Street and Mount Street Wrexham Storm Overflow Surface Water Sewer 0 0h -
Dwr Cymru Welsh Water Ruthin Berse Road Coedpoeth Storm Overflow Tributary of Afon Clywedog 0 0h -
Dwr Cymru Welsh Water Coedpoeth Talwrn Road No.1 Storm Overflow Tributary of Afon Gwenfro 0 0h -
Dwr Cymru Welsh Water Heol Y Fro Storm Overflow River Gwenfro 0 0h -
Dwr Cymru Welsh Water Llay Road Llay Storm Overflow Tributary of Afon Alyn 0 0h -
Dwr Cymru Welsh Water Holt Storm Overflow River Dee 0 0h -
Dwr Cymru Welsh Water Rhosnesni Lane Wrexham Overflow River Gwenfro 0 0h -
Dwr Cymru Welsh Water Brook Street & Vicarage Hill Wrexham Storm Overflow River Gwenfro 0 0h -
Dwr Cymru Welsh Water Holt WwTW Overflow River Dee 0 0h -
Dwr Cymru Welsh Water Rivulet Road Wrexham Storm Overflow River Gwenfro 0 0h -
Dwr Cymru Welsh Water Eyton Grove Storm Overflow Afon Clywedog 0 0h -
Dwr Cymru Welsh Water Wrexham Acton Storm Overflow Pond Adjacent 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

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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Analysing sewage pollution by the Water Industry

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© 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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