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Wirral West - 2025 Sewage

Polluted by sewage 2,489 hours in 2025 , monitoring offline 689 hours , potential overflows 17 hours

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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 Wirral West 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 Wirral West

Daily Data

Jan - 643 hours , 1 offline
Feb - 15 hours , 0 offline
Mar - 62 hours , 1 offline
Apr - 10 hours , 349 offline
May - 22 hours , 0 offline
Jun - 100 hours , 13 offline
Jul - 15 hours , 47 offline
Aug - 7 hours , 7 potential
Sept - 216 hours , 1 potential
Oct - 107 hours , 0 offline
Nov - 982 hours , 7 potential
Dec - 303 hours , 0 potential
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
United Utilities North Wirral WwTW (Meols) Liverpool Bay 37 743h 56m -
United Utilities North Wirral WwTW (Meols) Liverpool Bay 105 616h 12m 14 h
United Utilities North Wirral WwTW (Meols) Liverpool Bay 14 237h 25m 0 h
United Utilities North Wirral WwTW (Meols) Liverpool Bay 40 196h 7m 0 h
United Utilities Arrowe Road / Arrowe Brook Lane CSO Arrowe Brook River Birket 30 111h 51m -
United Utilities Harrington Avenue CSO Carr Drain 29 106h 54m 250 h
United Utilities Barnston Storm Tanks (51CSO065) Prenton Brook 19 100h 4m -
Dwr Cymru Welsh Water Seabank Road Heswall Storm Overflow River Dee Estuary 36 71h 26m -
United Utilities Whitebeam Walk CSO Greasby Brook Arrow Brook 25 68h 16m 0 h
Dwr Cymru Welsh Water Heswall WwTW Storm Overflow Estuarial Waters of the River Dee 12 68h 8m -
United Utilities Outside 81 Wood Lane CSO Arrowe Brook 9 28h 12m 377 h
United Utilities Frankby Close CSO Greasby Brook 14 27h 26m 2 h
United Utilities Greasby Road/ Cortsway Combined Sewer Overflow (Site ID 511WQ) (WIR0085) Arrowe Brook 5 24h 18m 27 h
United Utilities Thornton Hough PS Thornton Hough, Clatter 14 16h 49m 19 h
United Utilities Harrington Avenue CSO Carr Drain 6 16h 2m -
Dwr Cymru Welsh Water Riverbank Road Heswall Storm Overflow Estuarial Waters of the River Dee 5 11h 27m -
United Utilities Arrowe Road / Arrowe Brook Lane CSO Arrowe Brook River Birket 4 9h 27m -
United Utilities Barnston Storm Tanks (51CSO065) Prenton Brook 2 8h 44m -
United Utilities Whitebeam Walk CSO Greasby Brook Arrow Brook 4 7h 2m -
Dwr Cymru Welsh Water Heswall Cottage Lane Storm Overflow River Dee 2 5h -
Dwr Cymru Welsh Water Park West Heswall Overflow River Dee 3 4h 55m -
United Utilities Thornton Hough PS Thornton Hough, Clatter 2 3h 11m 0 h
United Utilities Rear of 65 Fulton Avenue CSO Newton Brook 2 2h 26m 1 h
United Utilities Westbourne Rd CSO (512ZA) Dee Estuary 1 1h 6m -
United Utilities Frankby Close CSO Greasby Brook 2 1h 6m -
United Utilities Outside 81 Wood Lane CSO Arrowe Brook 4 1h 2m 4 h
United Utilities Rear of 65 Fulton Avenue CSO Newton Brook 1 0h 26m -
United Utilities Black Horse Hill CSO Newton Brook River Birket 1 0h 20m 2 h
United Utilities Greasby Road/ Cortsway Combined Sewer Overflow (Site ID 511WQ) (WIR0085) Arrowe Brook 1 0h 12m -
United Utilities Ennisdale Drive CSO Newton Brook 0 0h -
United Utilities Black Horse Hill CSO Newton Brook River Birket 0 0h -
United Utilities West Kirkby Pumping Station (Site ID 51001) (WIR0092) Foxholes Brook 0 0h -
United Utilities Croft Drive/Shore Road CSO River Dee Estuary 0 0h -
United Utilities West Kirkby Pumping Station (Site ID 51001) (WIR0092) Foxholes Brook 0 0h -
United Utilities Westbourne Rd CSO (512ZA) Dee Estuary 0 0h -
United Utilities Stanley Road Pumping Station (Site ID 51005) (WIR0090) River Birket 0 0h -
United Utilities Croft Drive/Shore Road CSO River Dee Estuary 0 0h -
United Utilities Long Hey Road CSO River Dee 0 0h -
United Utilities Stanley Road Pumping Station (Site ID 51005) (WIR0090) River Birket 0 0h -
United Utilities Long Hey Road CSO River Dee 0 0h 4 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

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.

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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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