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Wrexham

Polluted by sewage 846 times in 2025 lasting 4,116 hours

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

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Live data for Wrexham in 2026

So far this year (as of 6 Oct 2026, 07:30) there has been 1,729 hours of sewage overflows, from 38 CSO Combined Sewage Overflow - a device that, when operating, pours combined rainwater & sewage into a waterway s

Totals for Wrexham in 2025

33 Sites polluted by Dwr Cymru Welsh Water
846 sewage dumps
4,116 hours duration
That's 5.72 months. On average 2.3 times a day

Change Over Time

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Sewage pollution map of Wrexham: 846 spills in 2025, lasting 4,116 hours, by Dwr Cymru Welsh Water
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Pollution Summary 2025

Here are all the reported sewage overflow totals for Wrexham in 2025. Sometimes sewage can be being dumped for months at a time.

Reporting refers to how much of the time the monitoring was active. In this constituency all the declared CSO Combined Sewage Overflow - a device that, when operating, pours combined rainwater & sewage into a waterway s appeared to have monitoring enabled for more than 50% of the year

Company Waterway Site Sewage Dumps Duration (Hours) Reporting %
Dwr Cymru Welsh Water Lavister Brook Storm Overflow at Lavister Wastewater Treatment Works 116 1,225 99.7
Dwr Cymru Welsh Water River Dee BANGOR ON DEE STW 48 561 99.9
Dwr Cymru Welsh Water River Dee FIVE FORDS STW 45 557 97.3
Dwr Cymru Welsh Water River Dee OVERTON WWTW 51 222 99.9
Dwr Cymru Welsh Water River Alyn GRESFORD STW 36 217 99.9
Dwr Cymru Welsh Water Clywedog Coedpoeth Nant PS 39 196 99.9
Dwr Cymru Welsh Water Dee HOLT STW 33 188 99.9
Dwr Cymru Welsh Water River Gwenfro Talwrn Road No 2 CSO 51 163 97.3
Dwr Cymru Welsh Water Singret Brook LLAY SINGRET (BOREEN CAM) CSO 47 127 99.4
Dwr Cymru Welsh Water Emral Brook Penley Hospital SPS 28 104 99.9
Dwr Cymru Welsh Water Nant Brook Brymbo SPS CSO 18 84 99.9
Dwr Cymru Welsh Water Pulford Brook Pulford CSO 23 72 99.5
Dwr Cymru Welsh Water River Clywedog LLWYN ONN CSO 33 59 99.9
Dwr Cymru Welsh Water River Alyn llay Chapel Lane CSO, opposite Garden Centre 15 42 58.1
Dwr Cymru Welsh Water River Gwenfro Wrexham Maesglas SPS 110 41 99.3
Dwr Cymru Welsh Water Alyn BRADLEY OLD STW - SSO 21 39 99.9
Dwr Cymru Welsh Water River Gwenfro Southsea Rollers Arms - CSO 9 37 99.9
Dwr Cymru Welsh Water Gwersyllt Fishpond Gwersyllt Glan Llyn (Fishpond) CSO 14 31 98.4
Dwr Cymru Welsh Water River Gwenfro CSO NR King’s Mills Queens Park WR 14 25 99.9
Dwr Cymru Welsh Water River Dee Eyton Grove SPS 3 22 99.9
Dwr Cymru Welsh Water River Gwenfro New Broughton CSO 2 22 99.7
Dwr Cymru Welsh Water River Clywedog Gwynfryn CSO 14 19 99.9
Dwr Cymru Welsh Water River Alun Rossett Level Crossing CSO 22 13 94.8
Dwr Cymru Welsh Water River Alyn Pandy SPS, Wrexham 16 12 99.8
Dwr Cymru Welsh Water River Gwenfro Settled Storm Overflow at Heol Y Fro 2 9 99.9
Dwr Cymru Welsh Water Gwenfro Ruthin Rd CSO, Gegin 6 8 99.6
Dwr Cymru Welsh Water River Dee Holt PS 10 4 99.9
Dwr Cymru Welsh Water River Clywedog Ruthin/Berse Road Coedpoeth CSO 7 2 99.6
Dwr Cymru Welsh Water River Gwenfro CSO O/S TOP RANK CLUB BROOK ST WREXHAM 6 1 99.7
Dwr Cymru Welsh Water River Alyn Cefn y Bedd PS 2 1 96.1
Dwr Cymru Welsh Water Pond Adj Wrexham Acton SPS 3 1 99.9
Dwr Cymru Welsh Water River Gwenfro CSO NEAR MINAFON QUEENS PARK WREXH 1 0 99.5
Dwr Cymru Welsh Water Gwenfro SEWERAGE SYSTEM WEST OF WEALDS CHES CSO 1 0 99.7
Dwr Cymru Welsh Water Surface Water Sewer CSO Adj Mount St/Yorke St 0 0 99.7
Dwr Cymru Welsh Water Surface Water Sewer Adj To River Gwenfro CSO Nr Rivulet Rd Queens Park Wrex 0 0 99.7

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.