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Warrington

Polluted by sewage 580 times in 2025 lasting 3,112 hours

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Totals for Warrington in 2025

28 Sites polluted by United Utilities

580 sewage dumps

3,112 hours duration

That's 4.32 months. On average 1.6 times a day

Change Over Time

Constituency for Warrington

Nearby Constituencies

Waterways in Warrington

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Pollution Summary 2025

Here are all the reported sewage overflow totals for Warrington in 2025. 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 place all the declared CSO Combined Sewage Overflow - a device that, when operating, pours combined rainwater & sewage into a waterway s appeared to have monitoring enabled for more than 50% of the year

Company	Waterway	Site	Sewage Dumps	Duration (Hours)	Reporting %
United Utilities	Mersey Estuary	WARRINGTON NORTH WWTW	68	560	99.95
United Utilities	M/C Ship Canal	WARRINGTON SOUTH WWTW	51	503	99.9
United Utilities	Longford Brook	ORFORD PARK CSO 48087	29	278	99.8
United Utilities	Un Cross Brook	WARRINGTON ROAD PS	18	197	99.9
United Utilities	Longford Brook	LONGFORD BARRAGE CSO 48008	17	189	99.8
United Utilities	Longford Brook	ATHLONE ROAD CSO 48062	15	146	100
United Utilities	River Mersey	KINGSWAY COMBINED SEWER OVERFLOW	70	133	99.8
United Utilities	Penketh Brook	HALL NOOK COMBINED SEWER OVERFLOW	56	131	100
United Utilities	Sankey Brook	LONGSHAW STREET CSO (48066)	12	124	83.9
United Utilities	Sankey Brook	BEWSEY BRIDGE PUMPING STN	9	112	100
United Utilities	Mill Brook	MILL LANE/WINWICK RD SSO	11	105	100
United Utilities	Cock Shot Brook	MILL HOUSE LANE CSO	24	103	98.6
United Utilities	Sankey Brook	BEWSEY BRIDGE CSO (BEWSY)	15	78	99.4
United Utilities	Mill Brook Via Sws	6 SANDY LANE WEST (LONGFORD) CSO	6	75	96.1
United Utilities	River Mersey	PADDINGTON PS 48028	29	64	96
United Utilities	River Mersey	THEWLIS STREET CSO	37	58	68.5
United Utilities	Sankey Brook	THORNTON ROAD DEPOT CSO 482U7	15	48	100
United Utilities	Dallam Brook Via Sws	4 TAVLIN AVENUE CSO	6	39	99.1
United Utilities	Mill Brook Via Sws	GOUGH AVENUE/SANDY LANE WEST CSO	11	32	99.9
United Utilities	Whittle Brook Via Sws	HIGHFIELD AVENUE CSO	6	25	100
United Utilities	Longford Brook Via Sws	JUNC ALDER LANE/NORTH AVE CSO	5	23	99
United Utilities	River Mersey	WHARF STREET CSO	2	23	79.6
United Utilities	Manchester Ship Canal	KNUTSFORD RD/GRAMMAR SCHOOL RD CSO	24	18	94.2
United Utilities	River Mersey	WESTY FLUMES 1 SOUTH CSO 489CB	8	10	100
United Utilities	Manchester Ship Canal	ELLESMERE ROAD CSO 481TI	9	9	99.9
United Utilities	Manchester Ship Canal	WALTON PS	25	9	99.9
United Utilities	Manchester Ship Canal	WARRINGTON/GRAPPENHALL	1	3	61.9
United Utilities	Whittle Brook	WARRINGTON ROAD WA5 2JL CSO	1	3	100
United Utilities	Sankey Brook	SANKEY BRIDGES PS	0	0	99.9

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. 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.

Analysing sewage pollution by the Water Industry

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