Top of the Poops | Constituency Sewage Map | Bolton South and Walkden

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Live data for Bolton South and Walkden in 2026

So far this year (as of 12 Sept 2026, 14:45) there has been 1,849 hours of sewage overflows, from 88 CSO Combined Sewage Overflow - a device that, when operating, pours combined rainwater & sewage into a waterway s

Totals for Bolton South and Walkden in 2025

31 Sites polluted by United Utilities

1,168 sewage dumps

4,585 hours duration

That's 6.37 months. On average 3.2 times a day

Change Over Time

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Constituencies near Bolton South and Walkden

Waterways in Bolton South and Walkden

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Pollution Summary 2025

Here are all the reported sewage overflow totals for Bolton South and Walkden 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 Irwell	BOLTON WASTEWATER TREATMENT WORKS	116	1,395	97.5
United Utilities	River Croal	HACKEN WORKS CSO	100	506	99.6
United Utilities	Little Hulton Stream	WORSLEY STW	115	495	100
United Utilities	Croal Minor	91 MANCHESTER ROAD CSO 072GO	114	302	93.2
United Utilities	Unity Brook	HULTON LANE ENDS STW	62	300	99.8
United Utilities	River Croal	CAMMERCLOUGH ROAD CSO	93	271	99.9
United Utilities	Tanner Hole Brook	ADELAIDE STREET CSO	59	220	99.8
United Utilities	Middle Brook	NO 76 MIDDLE BROOK CSO	94	160	96.1
United Utilities	River Irwell	KEARSLEY PS	27	131	100
United Utilities	Honksford Brook	CSO SOUTH OF ASHAWE GROVE	38	115	99.7
United Utilities	Jenny Beck Rvr Croal	WESTON ST VIKING ST CSO BOL0115	50	98	99.9
United Utilities	Clvrt Singing Clough Brook	STONECLOUGH ROAD CSO 07045	41	90	99.8
United Utilities	Singing Clough Brook	STONEHILL ROAD CSO 072TV	26	86	99.8
United Utilities	Ellen Brook Culvert	TYNESBANK	26	76	99.4
United Utilities	Jenny Beck, Rv Croal	RISHTON LANE/WESTON STREET CSO	41	73	99.9
United Utilities	Ellen Brook	NEWEARTH ROAD CSO	26	51	100
United Utilities	Culvrt Singing Clough Brook	STONEHILL ROAD CSO 07049	19	50	77.2
United Utilities	Worsley Brook	WALKDEN RD HOLYOAKE RD CSO 37045	19	27	99.6
United Utilities	Middle Brook	BLACKSHAW LANE CSO 072FW	15	24	99.3
United Utilities	Croal Minor	ORLANDO STREET CSO 078J3	12	19	100
United Utilities	River Croal	SPRINGFIELD TANK CSO	10	19	99.3
United Utilities	Clvrt River Irwell	SINGING CLOUGH CSO 071Q8	11	16	95.5
United Utilities	Singing Clough Brook	STONEHILL TRADING ESTATE CSO	5	13	99.3
United Utilities	River Croal	HALL LANE	9	10	100
United Utilities	River Croal	STPETERS WAY/SPRINGFIELD IND ES CSO	18	10	100
United Utilities	Honksford Brook	CSO SOUTH OF ASHAWE GROVE	2	4	99.7
United Utilities	Jenny Beck Rvr Croal	LEVER STREET NO 5 CSO 078CD	4	4	99.9
United Utilities	River Croal	FERN STREET CSO (078J3)	8	3	100
United Utilities	A Culverted Section Jenny Beck	LEVER STREET NO1 CSO	5	1	82
United Utilities	Honksford Brook Via Sws	BEECH GROVE CSO	2	1	99.4
United Utilities	Jenny Beck Culvert River Croal	CROFT LN MANCHESTER RD CSO BOL0206	1	0	98.5
United Utilities	Jenny Beck	BRIDGEMAN ST HIGHER SWAN LANE CSO	0	0	94.4
United Utilities	Middle Brook Via Sws	CALEDONIA ST HIBERNIA ST CSO 071IB	0	0	94.3
United Utilities	Croal Minor	CHURCH BANK (SIDE OF VIADUCT) CSO	0	0	96.3
United Utilities	Croal Minor	CHURCH BANK RAILWAY VIADUCT CSO	0	0	96.9
United Utilities	Astley Brook	LITTLE HULTON CSO	0	0	99.6
United Utilities	River Irwell	RIVERSIDE CSO BOLTO BOL0058	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

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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