Top of the Poops | Constituency Sewage Map | St Helens South and Whiston

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Live data for St Helens South and Whiston in 2026

So far this year (as of 18 May 2026, 12:00) there has been 18 hours of sewage overflows, from 24 CSO Combined Sewage Overflow - a device that, when operating, pours combined rainwater & sewage into a waterway s

Totals for St Helens South and Whiston in 2025

11 Sites polluted by United Utilities

188 sewage dumps

261 hours duration

That's 1.55 weeks. 3.6 times a week, on average

Change Over Time

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Constituencies near St Helens South and Whiston

Waterways in St Helens South and Whiston

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Pollution Summary 2025

Here are all the reported sewage overflow totals for St Helens South and Whiston 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 constituency 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	Sutton Brook Sankey Brook	GASKELL STREET CSO	38	62	99.3
United Utilities	Prescot Brook	MOLYNEUX DRIVE CSO 24009	38	47	99.8
United Utilities	Hardshaw Brook	WARRINGTON NEW ROAD (42060)	18	34	100
United Utilities	Rainford Brook	HARESFINCH ROAD	21	32	97.8
United Utilities	Eccleston Mere	ST HELENS ROAD CSO 422SZ	35	31	99.3
United Utilities	Rainford Brook	SANKEY BROOK (ST HELENS) CSO	16	25	100
United Utilities	Hardshaw Brook	JACKSON STREET CSO	13	23	99.5
United Utilities	Hardshaw Brook	WARRINGTON NEW ROAD CSO	6	2	100
United Utilities	Sutton Mill Brook	LEACH LANE ST HELENS CSO	1	1	84.2
United Utilities	Sutton Mill Brook	95 MILL LANE (ST. HELENS) CSO	1	0	71.7
United Utilities	Unknown	CRAB ST/DUKE ST	1	0	86.5

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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Contains Water UK National Storm Overflow Hub Data CC-BY-SA 4.0 and analysis © 2025 Top-Of-The-Poops

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