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Totals for Wallasey in 2025

43 Sites polluted by United Utilities

1,231 sewage dumps

5,648 hours duration

That's 7.84 months. On average 3.4 times a day

How does Wallasey compare?

Wallasey was the #2 most polluted bathing area in England & Wales, by duration of sewage overflows, as reported by the water companies

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Pollution Summary 2025

Here are all the reported sewage overflow totals for Wallasey in 2025.

Accuracy Warning

We use data from the water companies, but we are seeing many anomalies that make us believe that bathing location information is quite poor. The situation is likely far worse than reported here.

If the locations of the sewage outlets look a bit unusual, it is likely that the reporting of the data from the water company is in error. We rely on their data in order to draw these maps.

Other CSO Combined Sewage Overflow - a device that, when operating, pours combined rainwater & sewage into a waterway s may also be located nearby, however the water companies claim that these do not affect the water quality here.

Company	Waterway	Site	Sewage Dumps	Duration (Hours)	Reporting %
United Utilities	River Mersey Estuary	BROMBOROUGH WWTW	122	1,426	100
United Utilities	River Mersey Estuary	DOCK ROAD SOUTH CSO	86	726	100
United Utilities	River Mersey Estuary	BROMBOROUGH WWTW	94	665	99.9
United Utilities	River Mersey Estuary	LIVERPOOL WWTW	118	562	100
United Utilities	River Mersey Estuary	LIVERPOOL WWTW	60	433	100
United Utilities	River Mersey Estuary	MAYFIELD DRIVE PS1 CSO 512EZ	79	402	100
United Utilities	River Mersey Estuary	OPPOSITE 53 MOOR LANE CSO 382G6	42	190	99.1
United Utilities	River Mersey Estuary	51 MOOR LANE CSO	67	157	99.7
United Utilities	Mersey Estuary	THE DELL COMBINED SEWER OVERFLOW	50	157	100
United Utilities	Arrowe Brook River Birket	ARROWE BROOK LANE CSO	36	128	98.7
United Utilities	Carr Drain	Harrington Avenue CSO	32	124	97.1
United Utilities	Bidston Stream	LEASOWE ROAD CSO	53	91	99.7
United Utilities	River Mersey Estuary	COLLEGE ROAD ESHE ROAD CSO 38109	38	83	100
United Utilities	Bidston Stream	SANDY LANE CSO	61	77	100
United Utilities	Mersey Estuary	Woodside CSO	14	60	100
United Utilities	Mersey Estuary	WALLACRE ROAD CSO	31	56	100
United Utilities	River Birkett	BIDSTON BY-PASS CSO	13	47	72.4
United Utilities	Mersey Estuary	BANKHALL RELIEF CSO 99006	20	39	100
United Utilities	Mersey Estuary	EASTHAM VILLAGE CSO	25	29	99.8
United Utilities	Mersey Estuary	ST PAULS ROAD CSO 332TX PRE0006	31	29	98.8
United Utilities	River Mersey Estuary	O/S 107 LIVERPOOL ROAD CSO 382D3	20	27	100
United Utilities	Mersey Estuary	THERMAL ROAD/PORT CAUSEWAY CSO	22	23	99.8
United Utilities	Unknown	WINDBOURNE CSO	7	20	100
United Utilities	Mersey Estuary	JERICHO LANE CSO	6	19	100
United Utilities	Liverpool Bay	HARBORD ROAD PS 99047	14	17	100
United Utilities	River Mersey Estuarine Waters	BANKHALL RELIEF CSO 99005	7	10	100
United Utilities	River Mersey Estuary	THE BYPASS/LPOOL RD JUNCT CSO 382UR	9	4	76.4
United Utilities	River Mersey Estuary	FULWOOD CSO	7	4	100
United Utilities	River Mersey Estuary	BEACONS GUTTER SSO	10	4	100
United Utilities	Bidston Stream	STATION RD COMBINED SEWER OVERFLOW	6	3	99.4
United Utilities	River Mersey Estuary	RIMROSE BROOK CSO	10	3	100
United Utilities	Mersey Estuary	ST NICHOLAS STORM SEWER OVERFLOW	7	3	100
United Utilities	River Mersey Estuary	BOOTLE NORTHERN OPC CSO 99102	9	2	100
United Utilities	Bidston Stream	WALLACRE ROAD/BEAUFORT DRIVE CSO	4	2	100
United Utilities	Mersey Estuary	BROMBOROUGH POOL VILLAGE PS 51026	1	1	100
United Utilities	Mersey Estuary	SANDHILLS LANE CSO	3	1	100
United Utilities	River Mersey	BANKHALL CSO 99007 LIV0038	6	1	100
United Utilities	River Mersey	STRAND ROAD STORM SEWER OVERFLOW	2	1	100
United Utilities	River Birket	STANLEY AVENUE/GREEN LANE CSO	3	0	99.2
United Utilities	Bidston Stream	BEECHWOOD AVENUE CSO	1	0	99.2
United Utilities	Mersey Estuary	BATTERY LANE CSO	2	0	100
United Utilities	Bromborough Pool	PORT CAUSEWAY/CROSSWAY CSO	2	0	98.8
United Utilities	River Birket	WEST KIRBY PUMPING STATION	1	0	100
United Utilities	River Mersey Estuary	MILLERS BRIDGE CSO 99004	0	0	100

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

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.

Analysing sewage pollution by the Water Industry

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© 2020-2025 Top-Of-The-Poops CC-BY-SA 4.0,
© 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

Some data reproduced under Open Government Licence

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