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Blackburn (Blackburn with Darwen)

Polluted by sewage 1,002 times in 2025 lasting 2,706 hours

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Totals for Blackburn (Blackburn with Darwen) in 2025

36 Sites polluted by United Utilities

1,002 sewage dumps

2,706 hours duration

That's 3.76 months. On average 2.7 times a day

Change Over Time

Constituency for Blackburn (Blackburn with Darwen)

Nearby Constituencies

Waterways in Blackburn (Blackburn with Darwen)

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Pollution Summary 2025

Here are all the reported sewage overflow totals for Blackburn (Blackburn with Darwen) 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	Culvert River Darwen	SHARPLES STREET CSO	145	380	97.8
United Utilities	Showley Brook	WILPSHIRE WWTW (WILPS)	69	372	99.7
United Utilities	River Darwen	AQUEDUCT ROAD CSO	53	335	97.3
United Utilities	River Darwen	DARWEN WWTW	39	266	100
United Utilities	River Blakewater V Sws	PHILIPS ROAD CSO (052LO)	90	215	99.2
United Utilities	Little Harwood Brook	WHALLEY OLD RD/PROVIDENCE ST CSO	58	204	97.9
United Utilities	River Blakewater	PHILIPS ROAD CSO	32	186	99.8
United Utilities	River Blakewater	APPLEBY SREETT CSO	52	102	99.9
United Utilities	River Blakewater	LOWER AUDLEY CSO	40	98	99.9
United Utilities	Clvrt'D Section Knuzden Brook	ACCRINGTON ROAD CSO	43	89	99.8
United Utilities	River Blakewater	WITTON TANKS CSO	41	80	99.9
United Utilities	River Blakewater	ADDISON CLOSE CSO	49	71	99.9
United Utilities	Arley Brook	PRESTON NEW ROAD	36	59	99.1
United Utilities	Queens Park Culvert	QUEENS PARK ROAD CSO	33	49	99.9
United Utilities	River Darwen	BOLTON ROAD COMBINED SEWER OVERFLOW	45	45	100
United Utilities	Queens Park Culvert Via Sws	CUMBERLAND STREET CSO	25	25	99.9
United Utilities	Dinckley Brook	WEST OF DEWHURST FARM CSO 341RS	32	22	99.7
United Utilities	River Blakewater	ROLLESTON ROAD CSO	12	18	99.9
United Utilities	River Blakewater	DUKES BROW CSO	24	17	99.9
United Utilities	River Blakewater	NEW MILL STREET CSO	4	15	99.9
United Utilities	River Darwen	GORSE ST COMBINED SEWER OVERFLOW	18	12	100
United Utilities	River Darwen	CHERRY TREE WORKS SITE	8	10	100
United Utilities	River Blakewater	GATE STREET CSO	12	8	99.9
United Utilities	Unknown	COPSTER GREEN SEWER EJE	1	6	77.6
United Utilities	River Blakewater	FIELDEN STREET CSO	3	3	99.1
United Utilities	River Blakewater	VICTORIA STREET CSO	11	2	99.8
United Utilities	River Blakewater	APPLE STREET CSO	5	1	99.9
United Utilities	River Blakewater	BEECHWOOD ROAD CSO	3	0	100
United Utilities	River Blakewater	NOTRE DAME GARDENS CSO	1	0	100
United Utilities	River Darwen	WELLINGTON ROAD CSO	2	0	99.9
United Utilities	River Blakewater	MANOR ROAD CSO (052ER)	3	0	97.3
United Utilities	River Blakewater	WHALLEY RANGE/GRACE STREET CSO	3	0	100
United Utilities	River Blakewater Via Sws	WHALLEY RANGE/MILLHAM STREET CSO	3	0	100
United Utilities	River Blakewater	LARK HILL/BROOKHOUSE LANE CSO	3	0	89.5
United Utilities	River Blakewater	BROWNHILL DRIVE CSO	2	0	100
United Utilities	River Blakewater	WHALLEY NEW ROAD CSO	2	0	100
United Utilities	River Darwen	293 PRESTON OLD ROAD CSO (052M0)	0	0	99.6
United Utilities	Culvert Pringle St	BACK QUEENS PARK RD	0	0	97.9
United Utilities	River Blakewater	DAISY LANE CSO	0	0	100
United Utilities	River Blakewater	GREAT BOLTON STREET CSO	0	0	97.2
United Utilities	River Blakewater	GRIMSHAW PARK CSO	0	0	99.9
United Utilities	Leeds/Liverpool Canal	INFIRMARY STREET CSO 05050	0	0	93.9
United Utilities	River Blakewater	PRINGLE STREET CSO	0	0	100
United Utilities	River Blakewater	RAMSGREAVE DRIVE CSO	0	0	100
United Utilities	Arley Brook	REVIDGE RD/PRESTON NEW RD SSO	0	0	99.4
United Utilities	River Blakewater	WHALLEY RANGE / WESLEY STREET CSO	0	0	96.3

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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