Alyn and Deeside polluted by sewage 969 times in 2023 - lasting 4,491 hours
- but monitoring was disabled in some locations, so could be more

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Contains OS Data © Crown copyright & database right 2021-2023
© Top of the Poops 2021-2023
✔ means we have experimental daily data since 2023
Totals for Alyn and Deeside in 2023
37 Sites polluted by Dwr Cymru Welsh Water
969 sewage dumps
4,491 h duration
That's 6.24 months. On average 2.7 times a day
Change Over Time

Pollution Summary 2023

Here are all the reported sewage overflow totals for Alyn and Deeside in 2023. 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 4 of the total 43 CSO locations had reporting enabled for less than half the year, of which 4 had zero reporting.

Company Waterway Site Sewage Dumps Duration (Hours) Reporting %
Dwr Cymru Welsh Water Higher Ferry Drain BRETTON PS 120 998 100
Dwr Cymru Welsh Water Foundry Drain PADESWOOD ROAD STORM TANK CSO 88 816 100
Dwr Cymru Welsh Water Balderton Brook SANDY LANE SPS CELYN CRESCENT SALTN 79 324 99.5
Dwr Cymru Welsh Water Black Brook, Brad Brook Penyffordd Terminal SPS 47 306 100
Dwr Cymru Welsh Water Manor Drain GARDEN CITY BRITISH LEGION - CSO 38 245 100
Dwr Cymru Welsh Water Un-Named Of Broughton Br Lower Farm CSO, Drury 86 209 99.5
Dwr Cymru Welsh Water Queensferry Ditch MANCOT LANE CSO 28 166 100
Dwr Cymru Welsh Water Byr Brook Pont y Bodkin Lower PS 15 165 100
Dwr Cymru Welsh Water Golftyn Brook Connahs Quay Golftyn PS CSO/Storm 35 147 100
Dwr Cymru Welsh Water Black Brook TY GWYN WWTW BUCKLEY 28 139 100
Dwr Cymru Welsh Water Broughton Brook HAWARDEN WOOD LANE CSO 50 125 100
Dwr Cymru Welsh Water River Dee Ashgrove PS Shotton 51 122 99.9
Dwr Cymru Welsh Water River Dee Higher Kinnerton SPS 24 111 100
Dwr Cymru Welsh Water River Cegidog CYMAU PUMPING STATION/CSO 35 80 100
Dwr Cymru Welsh Water Un-Named Of Byr Brook Treuddyn Wastewater Treatment Works 18 55 100
Dwr Cymru Welsh Water Sandycroft Drain Factory Road CSO, Sandycroft 12 50 100
Dwr Cymru Welsh Water Alyn HOPE WwTW 3 48 100
Dwr Cymru Welsh Water River Alyn CAERGWRLE - RHYDDYN HILL ROAD CSO 24 46 88.5
Dwr Cymru Welsh Water Wepre Brook Connah's Quay Wepre PS 35 43 99.6
Dwr Cymru Welsh Water Broughton Brook Dobshill SPS 5 42 100
Dwr Cymru Welsh Water Byr Brook Pont Y Bodkin Main SPS 13 39 99.9
Dwr Cymru Welsh Water Alltami Brook BUCKLEY SOUTHDOWN PARK PS 8 38 100
Dwr Cymru Welsh Water Alyn CEFN Y BEDD GWERN ALYN SPS 34 37 99.8
Dwr Cymru Welsh Water Bretton Drain BRETTON PS 3 34 100
Dwr Cymru Welsh Water New Inn Brook BUCKLEY LIVERPOOL ROAD - SSO 15 29 100
Dwr Cymru Welsh Water Un-Named Watercourse QUEENSFERRY STW (SETTLED STORM) 9 16 100
Dwr Cymru Welsh Water Unnamed Watercourse Flowing To River Dee Cestrian St CSO 5 11 100
Dwr Cymru Welsh Water River Alyn HOPE SARN LANE CSO 30 10 99.9
Dwr Cymru Welsh Water River Dee Connahs Quay Dock Road PS 4 7 97.3
Dwr Cymru Welsh Water River Cegidog Ffrith SPS 2 7 99.8
Dwr Cymru Welsh Water Broughton Brook Sandycroft Phoenix Street CSO 3 4 100
Dwr Cymru Welsh Water Kelsterton Brook KELSTERTON PUMP STN. , , 7 2 98.3
Dwr Cymru Welsh Water Wepre Brook Buckley (The Willows) SPS 1 2 99.3
Dwr Cymru Welsh Water Pentre Drain HAWARDEN CROSS TREE LANE - SSO 7 2 100
Dwr Cymru Welsh Water River Alyn COMBINED SEWER OVERFLOW SERVING 2 1 100
Dwr Cymru Welsh Water Pulford Brook Powys Caer Estyn PS 3 1 98.3
Dwr Cymru Welsh Water Wepre Brook CONNAHS QUAY LOW LEVEL SPS STORM 2 0 98
Dwr Cymru Welsh Water Balderton Brook Saltney Bridge Street CSO 0 0 100
Dwr Cymru Welsh Water Black Brook Via Surface Water Drain Pen Y Ffordd West View SPS 0 0 99.9
Dwr Cymru Welsh Water River Dee Connahs Quay Linden Avenue - CSO 0 0 0
Dwr Cymru Welsh Water River Dee CONNAHS QUAY DEVA AVENUE - CSO 0 0 0
Dwr Cymru Welsh Water Alyn CAERGWRLE DERBY ROAD - SSO 0 0 0
Dwr Cymru Welsh Water Byr Brook Via A Ditch CSO At Treuddyn STW 0 0 0

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.