Top of the Poops | Constituency Sewage Map | Ashton-under-Lyne | Polluted by Severn Trent Water United Utilities

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Live data for Ashton-under-Lyne in 2026

So far this year (as of 18 May 2026, 12:00) there has been 646 hours of sewage overflows, from 56 CSO Combined Sewage Overflow - a device that, when operating, pours combined rainwater & sewage into a waterway s

Totals for Ashton-under-Lyne in 2025

20 Sites polluted by Severn Trent Water United Utilities

745 sewage dumps

3,308 hours duration

That's 4.59 months. On average 2 times a day

Change Over Time

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Waterways in Ashton-under-Lyne

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Pollution Summary 2025

Here are all the reported sewage overflow totals for Ashton-under-Lyne 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	River Tame	ASHTON-UNDER-LYNE STW	77	811	99.9
United Utilities	River Tame	DUKINFIELD WWTW	103	745	100
United Utilities	River Medlock	250M OF ASHTON ROAD BARDSLEY PS CSO	30	305	100
United Utilities	River Tame	BROOMSTAIR ROAD CSO	43	253	98.2
United Utilities	River Tame	TURNER LANE/ALEXANDRA ROAD	77	208	99.3
United Utilities	River Tame	WHARF STREET CSO 44184	59	202	99.9
United Utilities	Unknown	CLAYTON BRIDGE	42	173	84.1
United Utilities	River Tame	POTTINGER ST/OXFORD ST	55	120	99.1
United Utilities	River Tame	LOWER WHARF ST/SCOTLAND ST	60	110	100
United Utilities	Lumb Brook	CHAPPELL ROAD CSO	49	105	99.9
United Utilities	River Tame	LOWER WHARF STREET CSO 442EC	66	103	98.5
United Utilities	Gore Brook	LUMB LANE (AUDENSHAW) CSO & DET TNK	9	73	99.9
United Utilities	River Tame Via Sws	EDWARD STREET	27	37	99.7
United Utilities	Downshaw Brook	GAMBREL BANK ROAD CSO 441U7	22	24	99.5
United Utilities	Lumb Brook Via Surface Wtr Sew	MEDLOCK SPORTS CENTRE CSO	6	10	100
United Utilities	Smallshaw Brook	GREEN LANE LYNDHURST AVE CSO	5	7	99.9
United Utilities	Smallshaw Brook Via Sws	GREENWOOD AVE PLATT AVE CSO 441XE	2	6	100
United Utilities	River Tame	DUKINFIELD OUTFALL SEWER CSO 441SM	5	5	86.4
United Utilities	Moss Brook Via Sws	MANSHAW ROAD CSO	4	2	99.8
Severn Trent Water	Smestow Brook Via Sws	PARK CRESCENT CSO	4	0	100
United Utilities	Cock Brook	ARGYL STREET	0	0	88.8

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

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