Blackburn was polluted by sewage 1,910 times in 2023
lasting 11,512 hours - that's 1.33 years!
- but monitoring was disabled in some locations, so could be more

© OpenStreetMap contributors
Contains OS Data © Crown copyright & database right 2021-2023
© Top of the Poops 2021-2023
✔ means we have experimental daily data since 2023
Totals for Blackburn in 2023
39 Sites polluted by United Utilities
1,910 sewage dumps
11,512 h duration
That's 1.33 years! On average 5.2 times a day
Change Over Time
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Pollution Summary 2023

Here are all the reported sewage overflow totals for Blackburn in 2023. 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 1 of the total 44 CSO locations had reporting enabled for less than half the year, of which 1 had zero reporting.

Company Waterway Site Sewage Dumps Duration (Hours) Reporting %
United Utilities River Blakewater FIELDEN STREET CSO 154 3,366 98
United Utilities River Blakewater DAISY LANE CSO 152 1,973 97.4
United Utilities Culvert River Darwen SHARPLES STREET CSO 206 828 99.7
United Utilities River Darwen AQUEDUCT ROAD CSO 90 789 100
United Utilities River Blakewater PHILIPS ROAD CSO 72 738 97.2
United Utilities River Blakewater APPLEBY SREETT CSO 94 527 100
United Utilities River Blakewater NEW MILL STREET CSO 36 511 87.3
United Utilities River Blakewater LOWER AUDLEY CSO 131 429 100
United Utilities Culvert Culvert St MERCHANTS LANDING CULVERT ST CSO 23 348 100
United Utilities River Blakewater V Sws PHILIPS ROAD CSO (052LO) 131 328 96.7
United Utilities Queens Park Culvert Via Sws CUMBERLAND STREET CSO 83 291 99.9
United Utilities River Blakewater THWAITES BREWERY YARD 77 223 99.9
United Utilities Clvrt'D Section Knuzden Brook ACCRINGTON ROAD CSO 70 156 100
United Utilities River Blakewater WITTON TANKS CSO 60 138 99.9
United Utilities Leeds/Liverpool Canal INFIRMARY STREET CSO 05050 16 135 100
United Utilities River Darwen GORSE ST COMBINED SEWER OVERFLOW 56 134 82.9
United Utilities River Blakewater ADDISON CLOSE CSO 79 104 100
United Utilities Queens Park Culvert QUEENS PARK ROAD CSO 48 104 98.8
United Utilities River Blakewater APPLE STREET CSO 35 100 97.9
United Utilities Queens Park Culvert DICKENS STREET CSO 26 92 100
United Utilities Little Harwood Brook WHALLEY OLD RD/PROVIDENCE ST CSO 89 87 100
United Utilities River Blakewater GATE STREET CSO 42 25 100
United Utilities River Darwen BOLTON ROAD COMBINED SEWER OVERFLOW 22 19 99.2
United Utilities River Blakewater DUKES BROW CSO 20 14 97.2
United Utilities River Blakewater VICTORIA STREET CSO 33 8 100
United Utilities River Darwen CHERRY TREE WORKS SITE 9 7 100
United Utilities Arley Brook REVIDGE RD/PRESTON NEW RD SSO 10 7 94.6
United Utilities River Blakewater NOTRE DAME GARDENS CSO 5 5 97.9
United Utilities River Darwen WELLINGTON ROAD CSO 5 3 100
United Utilities River Blakewater BROWNHILL DRIVE CSO 6 1 100
United Utilities River Blakewater WHALLEY RANGE/GRACE STREET CSO 8 1 100
United Utilities River Blakewater BEECHWOOD ROAD CSO 3 1 100
United Utilities River Blakewater PRINGLE STREET CSO 3 1 100
United Utilities River Blakewater Via Sws WHALLEY RANGE/MILLHAM STREET CSO 6 0 100
United Utilities River Blakewater RAMSGREAVE DRIVE CSO 3 0 100
United Utilities River Blakewater MANOR ROAD CSO (052ER) 4 0 100
United Utilities River Blakewater GRIMSHAW PARK CSO 1 0 100
United Utilities River Darwen 293 PRESTON OLD ROAD CSO (052M0) 1 0 100
United Utilities River Blakewater WHALLEY NEW ROAD CSO 1 0 100
United Utilities River Blakewater 293 PRESTON OLD ROAD CSO (052M0) 0 0 100
United Utilities River Blakewater LARK HILL/BROOKHOUSE LANE CSO 0 0 93.9
United Utilities River Blakewater GREAT BOLTON STREET CSO 0 0 99.7
United Utilities River Blakewater WHALLEY RANGE / WESLEY STREET CSO 0 0 100
United Utilities Culvert Pringle St BACK QUEENS PARK RD 0 0 0

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. This 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.