Top of the Poops | Constituency Sewage Map

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View Annual Sewage Data

You're looking at the totals that we have calculated for sewage in Blackburn for 2025. It is an estimate, based on very poor quality live data from the Water Companies. This may not align with the 'official' reported sewage values from the water companies, which is reported in April following then end of the year - so 2025 numbers are reported in April 2026.

What's a potential overflow? If the CSO goes 'Offline' while its Overflowing, we don't know if it stopped overflowing until we get a 'Stop' event.

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Constituencies near Blackburn

Company	Site Name	Receiving Waterway	Overflow Days	Total Duration (hours)	Offline/Potential Pollution
United Utilities	SHARPLES STREET CSO	River Darwen	121	331h 16m	48 h
United Utilities	Aqueduct Road CSO	River Darwen	41	214h 21m	-
United Utilities	WHALLEY OLD ROAD / PROVIDENCE STREET CSO	Little Harwood Brook	42	204h 22m	3 h
United Utilities	PHILLIPS ROAD CSO	River Blakewater V Sws	72	168h 26m	1 h
United Utilities	Philips Road CSO	River Blakewater	26	140h 42m	-
United Utilities	Aqueduct Road CSO	River Darwen	16	121h 21m	-
United Utilities	SHARPLES STREET CSO	River Darwen	22	105h 50m	9 h
United Utilities	Thwaites Brewery Yard CSO	River Blakewater	41	100h 1m	-
United Utilities	Lower Audley Street CSO	River Blakewater	38	97h 38m	24 h
United Utilities	Appleby Street CSO	River Blakewater	43	90h 53m	-
United Utilities	Witton Tanks CSO	River Blakewater	37	70h 58m	-
United Utilities	Accrington Road CSO	Clvrt'D Section Knuzden Brook	33	69h 13m	-
United Utilities	Addison Close CSO	River Blakewater	44	65h 24m	-
United Utilities	Dukes Brow Combined Sewer Overflow (Site ID 051SL) (BBN0069)	River Blakewater	20	63h 50m	359 h
United Utilities	Philips Road CSO	River Blakewater	10	51h 12m	-
United Utilities	PHILLIPS ROAD CSO	River Blakewater V Sws	16	50h 2m	-
United Utilities	Queens Park Road CSO	Queens Park Culvert	22	39h 41m	-
United Utilities	Bolton Road CSO	River Darwen	33	39h 32m	-
United Utilities	Dickens Street CSO	Queens Park Culvert	13	34h 1m	-
United Utilities	Thwaites Brewery Yard CSO	River Blakewater	12	27h 6m	-
United Utilities	Accrington Road CSO	Clvrt'D Section Knuzden Brook	9	18h 24m	-
United Utilities	Rolleston Road CSO	Norbury	9	17h 37m	-
United Utilities	Lower Audley Street CSO	River Blakewater	10	17h 8m	-
United Utilities	New Mill Street CSO	River Blakewater	5	16h 13m	-
United Utilities	Cumberland Street CSO	Queens Park Culvert Via Sws	17	14h 44m	-
United Utilities	Appleby Street CSO	River Blakewater	10	11h 16m	-
United Utilities	Witton Tanks CSO	River Blakewater	8	10h 38m	-
United Utilities	GATE STREET CSO	River Blakewater	8	10h 18m	0 h
United Utilities	Gorse Street CSO	River Darwen	14	9h 21m	370 h
United Utilities	Cherry Tree/Feniscowles CSO	River Darwen	8	8h 42m	3 h
United Utilities	Addison Close CSO	River Blakewater	7	5h 6m	-
United Utilities	Queens Park Road CSO	Queens Park Culvert	5	4h 38m	-
United Utilities	Bolton Road CSO	River Darwen	6	4h 36m	-
United Utilities	Dickens Street CSO	Queens Park Culvert	2	3h 30m	-
United Utilities	Fielden Street CSO	River Blakewater	2	3h 4m	-
United Utilities	Gorse Street CSO	River Darwen	3	2h 46m	-
United Utilities	Cherry Tree/Feniscowles CSO	River Darwen	3	2h 30m	-
United Utilities	VICTORIA STREET CSO	River Blakewater	5	2h 8m	-
United Utilities	WHALLEY OLD ROAD / PROVIDENCE STREET CSO	Little Harwood Brook	6	1h 54m	-
United Utilities	Cumberland Street CSO	Queens Park Culvert Via Sws	3	1h 30m	-
United Utilities	APPLE STREET CSO	River Blakewater	6	1h 4m	2 h
United Utilities	WELLINGTON ROAD CSO	River Darwen	1	0h 38m	0 h
United Utilities	Dukes Brow Combined Sewer Overflow (Site ID 051SL) (BBN0069)	River Blakewater	2	0h 36m	-
United Utilities	NOTRE DAME GARDENS CSO	River Blakewater	1	0h 34m	-
United Utilities	Beechwood Road CSO	River Blakewater	1	0h 30m	-
United Utilities	WHALLEY RANGE / MILLHAM STREET CSO	River Blakewater Via Sws	3	0h 24m	-
United Utilities	MANOR ROAD CSO	River Blakewater	1	0h 14m	-
United Utilities	Lark Hill/Brook House Lane CSO	River Blakewater	2	0h 12m	4 h
United Utilities	WHALLEY NEW ROAD CSO	River Blakewater	3	0h 10m	-
United Utilities	GATE STREET CSO	River Blakewater	1	0h 6m	-
United Utilities	Back Queen's Park Road CSO	Culvert Pringle St	1	0h 6m	-
United Utilities	PRINGLE STREET CSO	River Blakewater	1	0h 2m	-
United Utilities	Back Queen's Park Road CSO	Culvert Pringle St	1	0h 2m	-
United Utilities	Rolleston Road CSO	Norbury	0	0h	-
United Utilities	WHALLEY NEW ROAD CSO	River Blakewater	0	0h	-
United Utilities	PRINGLE STREET CSO	River Blakewater	0	0h	-
United Utilities	New Mill Street CSO	River Blakewater	0	0h	-
United Utilities	WELLINGTON ROAD CSO	River Darwen	0	0h	-
United Utilities	Whalley Range/Westley Street CSO	River Blakewater	0	0h	1 h
United Utilities	Grimshaw Park CSO	River Blakewater	0	0h	-
United Utilities	Preston Old Road CSO	River Blakewater	0	0h	-
United Utilities	WHALLEY RANGE / MILLHAM STREET CSO	River Blakewater Via Sws	0	0h	-
United Utilities	Ramsgreave Drive CSO	River Blakewater	0	0h	3 h
United Utilities	MANOR ROAD CSO	River Blakewater	0	0h	-
United Utilities	Fielden Street CSO	River Blakewater	0	0h	-
United Utilities	Merchants Landing (Culvert Street) CSO	Culvert Culvert St	0	0h	1 h
United Utilities	APPLE STREET CSO	River Blakewater	0	0h	-
United Utilities	Merchants Landing (Culvert Street) CSO	Culvert Culvert St	0	0h	-
United Utilities	Whalley Range/Westley Street CSO	River Blakewater	0	0h	-
United Utilities	293 PRESTON OLD ROAD CSO	River Darwen	0	0h	-
United Utilities	Whalley Range CSO	River Blakewater	0	0h	0 h
United Utilities	Beechwood Road CSO	River Blakewater	0	0h	-
United Utilities	BROWNHILL DRIVE CSO	River Blakewater	0	0h	0 h
United Utilities	Revidge Road/Preston New Road	Arley Brook	0	0h	-
United Utilities	Ramsgreave Drive CSO	River Blakewater	0	0h	-
United Utilities	Revidge Road/Preston New Road	Arley Brook	0	0h	-
United Utilities	Grimshaw Park CSO	River Blakewater	0	0h	0 h
United Utilities	VICTORIA STREET CSO	River Blakewater	0	0h	-
United Utilities	NOTRE DAME GARDENS CSO	River Blakewater	0	0h	-
United Utilities	BROWNHILL DRIVE CSO	River Blakewater	0	0h	-
United Utilities	DAISY LANE CSO	River Blakewater	0	0h	-
United Utilities	293 PRESTON OLD ROAD CSO	River Darwen	0	0h	19 h
United Utilities	Whalley Range CSO	River Blakewater	0	0h	-
United Utilities	Great Bolton Street CSO	River Blakewater	0	0h	-
United Utilities	Preston Old Road CSO	River Blakewater	0	0h	-
United Utilities	Lark Hill/Brook House Lane CSO	River Blakewater	0	0h	-
United Utilities	Infirmary Street CSO	Leeds/Liverpool Canal	0	0h	-
United Utilities	DAISY LANE CSO	River Blakewater	0	0h	-

Company

Site Name

Receiving Waterway

Overflow Days

Total Duration (hours)

Offline/Potential Pollution

United Utilities

SHARPLES STREET CSO

River Darwen

121

331h 16m

48 h