Wallasey was polluted by sewage 666 times in 2024
lasting 2,810 hours
- but monitoring was disabled in some locations, so could be more

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Contains OS Data © Crown copyright & database right 2021-2024
© Top of the Poops 2021-2024
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✔ means we have experimental daily data since 2023
Live data for Wallasey in 2025
So far this year (as of Apr 16, 2025, 6:15 PM) there has been 712 hours of sewage overflows
Totals for Wallasey in 2024
18 Sites polluted by United Utilities
666 sewage dumps
2,810 h duration
That's 3.9 months. On average 1.8 times a day
Change Over Time
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Constituencies near Wallasey
Daily Data
We get information about overflowing CSOs since January 2025. Here is a chart of the last three months of data for Wallasey, here you can see overflows in red, the darker the red, the more the CSO overflowed that day.
Each CSO has a row, the most recent data is on the right hand side.
     Monitoring Online      Monitoring Offline      Polluting      Potentially Polluting      Unknown
Daily data is experimental and data is not guaranteed to be accurate. Please inform us of any issue, we will fix.

Pollution Summary 2024

Here are all the reported sewage overflow totals for Wallasey in 2024. 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 1 of the total 20 CSO locations had reporting enabled for less than half the year, of which 1 had zero reporting.

Company Waterway Site Sewage Dumps Duration (Hours) Reporting %
United Utilities River Mersey Estuary WALLASEY WW PUMPING STATION 269 1,401 99.87
United Utilities River Fender REAR OF 25 WHEATFIELD CLOSE CSO 83 462 99.1
United Utilities River Fender UPTON ROAD CSO 513N8 38 279 96.6
United Utilities Arrowe Brook WASTDALE DRIVE CSO 46 209 100
United Utilities Bidston Stream LEASOWE ROAD CSO 41 151 98.8
United Utilities Bidston Stream SANDY LANE CSO 74 98 99.7
United Utilities River Fender HOYLAKE ROAD/CHAPELHILL CSO 35 86 99.2
United Utilities Mersey Estuary WALLACRE ROAD CSO 34 64 100
United Utilities Arrowe Brook 389 HOYLAKE ROAD CSO 12 28 99.2
United Utilities Arrowe Brook GARRICK AVENUE CSO 2 9 99.4
United Utilities Bidston Stream WALLACRE ROAD/BEAUFORT DRIVE CSO 8 7 98.9
United Utilities Bidston Stream STATION RD COMBINED SEWER OVERFLOW 8 5 100
United Utilities Arrowe Brook ACTON LANE COMBINED SEWER OVERFLOW 4 2 99.4
United Utilities River Birket STANLEY AVENUE/GREEN LANE CSO 6 2 92
United Utilities River Fender BRISCOE DRIVE CSO 511G9 3 0 95.9
United Utilities Arrowe Brook KINGFISHER WAY CSO 1 0 99.6
United Utilities Bidston Stream BEECHWOOD AVENUE CSO 1 0 98.9
United Utilities River Mersey Estuary WALLASEY COASTAL DRIVE 51052 1 0 100
United Utilities Tidal River Mersey NEW BRIGHTON PUMPING STATION 0 0 0
United Utilities Arrowe Brook MARYLAND LANE CSO 0 0 96.9

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. 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.