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Alyn and Deeside - 2025 Sewage

Polluted by sewage 3,601 hours in 2025

© 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 Alyn and Deeside 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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Daily Data

Jan - 0 hours
Feb - 134 hours
Mar - 129 hours
Apr - 63 hours
May - 158 hours
Jun - 257 hours
Jul - 450 hours
Aug - 66 hours
Sept - 455 hours
Oct - 130 hours
Nov - 1,064 hours
Dec - 673 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 Spring Street Connahs Quay Overflow Wepra Brook 217 1,744h 58m -
Dwr Cymru Welsh Water Padeswood Road Buckley Storm Overflow Foundry Drain 36 271h 47m -
Dwr Cymru Welsh Water Broughton Mills Road Bretton Storm Overflow Higher Ferry Drain 26 173h 50m -
Dwr Cymru Welsh Water Shotton Ash Grove Storm Overflow River Dee 41 140h 56m -
Dwr Cymru Welsh Water Drury Lane Storm Overflow Tributary of Broughton Brook 46 132h 38m -
Dwr Cymru Welsh Water Penyffordd WwTW Storm Overflow Black Brook 24 111h 41m -
Dwr Cymru Welsh Water Saltney Sandy Lane Storm Overflow Balderton Brook 19 95h 28m -
Dwr Cymru Welsh Water Castle Road Flint Overflow River Dee Estuary 38 91h 30m -
Dwr Cymru Welsh Water Maes Gwyn Storm Overflow Surface Water 53 86h 25m -
Dwr Cymru Welsh Water Flint WwTW Storm Overflow River Dee Estuary 16 86h 7m -
Dwr Cymru Welsh Water Wood Lane Hawarden Storm Overflow Broughton Brook 27 59h 40m -
Dwr Cymru Welsh Water Buckley Ty Gwyn Storm Overflow Black Brook 9 59h 23m -
Dwr Cymru Welsh Water Mancot Lane Mancot Storm Overflow Queensferry Ditch 11 52h 42m -
Dwr Cymru Welsh Water Dobshill Storm Overflow Unnamed Tributary of Broughton Brook 13 52h 14m -
Dwr Cymru Welsh Water Treuddyn WwTW Storm Overflow Byr Brook 13 47h 53m -
Dwr Cymru Welsh Water Higher Kinnerton Storm Overflow Tributary of the River Dee 10 47h 35m -
Dwr Cymru Welsh Water East of railway Cefn Y Bedd Storm Overflow River Alyn 22 47h 7m -
Dwr Cymru Welsh Water Church Street Connahs Quay Storm Overflow Golflyn Brook 14 44h 30m -
Dwr Cymru Welsh Water Queensferry WwTW Storm Overflow River Dee 8 41h 30m -
Dwr Cymru Welsh Water Dee Cottages Storm Overflow River Dee 13 33h 23m -
Dwr Cymru Welsh Water Greenacre Drive Bagillt Storm Overflow Ditch 7 33h 16m -
Dwr Cymru Welsh Water Bagillt West Storm Overflow Dee Estuary 12 22h 44m -
Dwr Cymru Welsh Water Station Road Bagillt Storm Overflow Dee Estuary 5 18h 42m -
Dwr Cymru Welsh Water Rhyddyn Hill Caergwrle Storm Overflow River Alyn 9 17h 12m -
Dwr Cymru Welsh Water White Farm Road Buckley Overflow Tributary of Wepre Brook 5 12h 27m -
Dwr Cymru Welsh Water Flint Mountain Storm Overflow Pentre Ffwrdan Stream 7 11h 45m -
Dwr Cymru Welsh Water Bridge Street Connahs Quay Storm Overflow Wepre Brook 8 11h 8m -
Dwr Cymru Welsh Water Liverpool Road Buckley Storm Overflow New Inn Brook 8 9h 29m -
Dwr Cymru Welsh Water Factory Road Sandycroft Storm Overflow Sandycroft Drain 15 9h 1m -
Dwr Cymru Welsh Water Upper Bryn Road Connahs Quay Storm Overflow River Dee 8 6h 45m -
Dwr Cymru Welsh Water Welsh Road Roundabout Storm Overflow Manor Drain 4 5h 16m -
Dwr Cymru Welsh Water Cestrian Street Connah's Quay Storm Overflow River Dee 7 5h 14m -
Dwr Cymru Welsh Water Hope Cymau Storm Overflow Afon Cegidog 5 4h 30m -
Dwr Cymru Welsh Water Station Road Bagillt Storm Overflow River Dee 2 3h 43m -
Dwr Cymru Welsh Water Aberllanerch Drive Storm Overflow Nant Alltami 2 3h -
Dwr Cymru Welsh Water Kelsterton Road Connah's Quay Storm Overflow Kelsterton Brook 1 1h 42m -
Dwr Cymru Welsh Water Sarn Lane Hope Storm Overflow River Alyn 2 1h 11m -
Dwr Cymru Welsh Water Manor Drive Storm Overflow Unnamed Watercourse 3 1h -
Dwr Cymru Welsh Water Pontybodkin Main Storm Overflow Nant Byr 1 0h 57m -
Dwr Cymru Welsh Water Merllyn Lane Bagillt Storm Overflow Unnamed Watercourse 1 0h 15m -
Dwr Cymru Welsh Water Dock Road Connahs Quay Storm Overflow River Dee 1 0h 15m -
Dwr Cymru Welsh Water Phoenix Street Sandycroft Storm Overflow Broughton Brook 0 0h -
Dwr Cymru Welsh Water Dee Road Connahs Quay Overflow Nant Gwepra 0 0h -
Dwr Cymru Welsh Water Hope WwTW Storm Overflow River Alyn 0 0h -
Dwr Cymru Welsh Water Bridge Street Saltney Storm Overflow Balderton Brook 0 0h -
Dwr Cymru Welsh Water Linden Avenue Storm Overflow River Dee 0 0h -
Dwr Cymru Welsh Water The Meadows Flint Overflow Swinchiard Brook 0 0h -
Dwr Cymru Welsh Water Pont Y Bodkin Lower Storm Overflow Byr Brook 0 0h -
Dwr Cymru Welsh Water New Brighton Road Bagillt Overflow Unnamed Watercourse discharging to the River Dee 0 0h -
Dwr Cymru Welsh Water Old London Road Bagillt Storm Overflow Unnamed stream 0 0h -
Dwr Cymru Welsh Water Hope Street Storm Overflow River Alyn 0 0h -
Dwr Cymru Welsh Water North of Evans Street Flint Overflow Swinchiard Brook 0 0h -
Dwr Cymru Welsh Water Oakenholt Main Storm Overflow Pentre Ffwrdan Stream 0 0h -
Dwr Cymru Welsh Water Broughton Mills Road and Chester Road Bretton Storm Overflow Bretton Drain 0 0h -
Dwr Cymru Welsh Water West View Penyffordd Storm Overflow Black Brook 0 0h -
Dwr Cymru Welsh Water Near Spring Street Connahs Quay Storm Overflow Wepre Brook 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.