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Polluted by sewage 1,368 times in 2024 lasting 6,267 hours
Monitoring fell below 50% in some locations so could be more
So far this year (as of May 29, 2025, 1:45 AM) there has been 1,524 hours of sewage overflows
Your local MP is Andy MacNae (Labour) - Find out more about their interests, donors, and voting at They Work For You
We get information about overflowing CSOs since January 2025. Here is a chart of the last three months of data for Rossendale and Darwen, here you can see overflows in red, the darker the red, the more the CSO overflowed that day.
Each CSO has a row, the most recent data is on the right hand side.
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Donate NowHere are all the reported sewage overflow totals for Rossendale and Darwen in 2024. 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 2 of the total 67 CSO locations had reporting enabled for less than half the year.
| Company | Waterway | Site | Sewage Dumps | Duration (Hours) | Reporting % |
|---|---|---|---|---|---|
| United Utilities | River Irwell | THE GLEN COMBINED SEWER OVERFLOW | 152 | 1,544 | 99.9 |
| United Utilities | River Irwell | ROSSENDALE WWTW | 100 | 1,402 | 100 |
| United Utilities | River Irwell | BACUP ROAD/FALBARN FOLD CSO | 85 | 481 | 100 |
| United Utilities | Unknown | BOLTON ROAD SSO | 53 | 316 | 99 |
| United Utilities | River Spodden | WHITWORTH CSO | 53 | 290 | 100 |
| United Utilities | River Irwell | 295 BACUP ROAD CSO | 48 | 223 | 99.1 |
| United Utilities | River Irwell | NEWCHURCH ROAD CSO (36013) | 23 | 201 | 100 |
| United Utilities | River Irwell | NEWCHURCH ROAD/BROOKS STREET CSO | 61 | 184 | 99.3 |
| United Utilities | Limy Water R Irwell | BANK ST COMBINED SEWER OVERFLOW | 36 | 155 | 99.8 |
| United Utilities | Swinnel Brook | HELMSHORE CARAVAN PARK CSO | 40 | 136 | 99.9 |
| United Utilities | River Darwen | DARWEN WWTW | 12 | 115 | 100 |
| United Utilities | Whitewell Brook | 143 BURNLEY ROAD EAST CSO | 26 | 114 | 88.1 |
| United Utilities | Limy Water | RUSHBED SSO | 24 | 104 | 84.6 |
| United Utilities | River Darwen | CLARENCE STREET CSO | 46 | 101 | 98.8 |
| United Utilities | River Darwen | HIGHER PERRY ST/BLACK LAUREL ST CSO | 80 | 91 | 98.7 |
| United Utilities | Culverted Section River Darwen | BALLE STREET HILTON STREET CSO | 62 | 87 | 98.5 |
| United Utilities | River Irwell | NEWCHURCH ROAD/WESLEY PLACE CSO | 27 | 77 | 99.2 |
| United Utilities | River Irwell | HIGHFIELD ROAD CSO | 17 | 64 | 97.8 |
| United Utilities | Waterside Brook | WATERSIDE CSO 052Z1 | 13 | 59 | 98.4 |
| United Utilities | River Darwen | COTTON HALL STREET CSO | 50 | 51 | 98.9 |
| United Utilities | River Irwell | NEW HALL HEY ROAD CSO | 13 | 50 | 100 |
| United Utilities | River Darwen | BALLE STREET HILTON STREET CSO | 49 | 48 | 98.4 |
| United Utilities | River Darwen | ANYON STREET/LAUREL AVE CSO | 44 | 42 | 98.8 |
| United Utilities | River Irwell | WATERBARN LANE CSO | 12 | 34 | 99.2 |
| United Utilities | River Darwen | GRIMSHAW STREET CSO | 21 | 30 | 100 |
| United Utilities | Quarlton Brook | BROADHEAD ROAD CSO 051FX | 15 | 29 | 98.9 |
| United Utilities | River Darwen | SUDELL ROAD CSO | 19 | 27 | 99.3 |
| United Utilities | River Ogden | IRWELL VALE PS | 9 | 25 | 17.1 |
| United Utilities | River Irwell | HAMMERTONSTREET/STANLEY STREET CSO | 13 | 23 | 89 |
| United Utilities | River Irwell | BURNLEY ROAD BACUP CSO | 5 | 16 | 99.2 |
| United Utilities | River Darwen | 28 TYTHEBARN ST | 14 | 13 | 100 |
| United Utilities | Whitewell Brook | BURNLEY RD E/BOOTH ST CSO | 22 | 13 | 99.1 |
| United Utilities | River Irwell | NEWCHURCH ROAD BACUP CSO | 9 | 12 | 99.4 |
| United Utilities | Unknown | COWDE RD BR. | 8 | 12 | 94.9 |
| United Utilities | River Darwen Via Sws | HINDLE STREET CSO | 18 | 10 | 99.2 |
| United Utilities | Whitewell Brook | BURNLEY RD E /WHITEWELL BOTTOM CSO | 3 | 9 | 96 |
| United Utilities | River Spodden | WHITWORTH SSO | 5 | 9 | 89.3 |
| United Utilities | Whitewll Brook | BURNLEY ROAD EAST/SHAWCLOUGH CSO | 2 | 7 | 46.6 |
| United Utilities | Kebbs Brook, Riv Darwen | BOLTON ROAD/ASTLEY STREET CSO | 13 | 6 | 100 |
| United Utilities | River Darwen | BOLTON ROAD CSO | 13 | 6 | 100 |
| United Utilities | River Darwen | CRANBERRY LANE CSO | 5 | 4 | 99.2 |
| United Utilities | River Irwell | 709 BACUP ROAD CSO | 3 | 4 | 97 |
| United Utilities | River Irwell | BLACKWOOD ROAD CSO | 3 | 3 | 99.6 |
| United Utilities | River Irwell | SOUTH STREET/PICKUP STREET CSO | 6 | 3 | 99.3 |
| United Utilities | Whitewell Brook | BURNLEY ROAD EAST/TOWNLEY ARMS CSO | 2 | 2 | 99 |
| United Utilities | River Darwen | FOOTPATH NR CROSS ST CSO | 2 | 2 | 95.9 |
| United Utilities | River Irwell | LEE ROAD CSO (369BA) | 2 | 2 | 99.5 |
| United Utilities | Greave Clough Via Sws | GREAVE CLOUGH DRIVE CSO | 2 | 1 | 99.3 |
| United Utilities | River Darwen | KAY STREET CSO | 7 | 1 | 99.3 |
| United Utilities | River Irwell | ROCKLIFFE ROAD/RIVER STREET CSO | 6 | 1 | 99.2 |
| United Utilities | River Spodden | STATION ROAD (WHITWORTH) CSO | 4 | 1 | 99.6 |
| United Utilities | Culverted Langwood Brook | MANCHESTER RD CSO (363F2) | 2 | 0 | 99.4 |
| United Utilities | Culverted Section River Darwen | CHURCH STREET/PARLIAMENT STREET CSO | 4 | 0 | 99.3 |
| United Utilities | River Darwen | VALE STREET | 2 | 0 | 99.9 |
| United Utilities | River Darwen | REDEARTH ROAD/SUDELL ROAD CSO | 2 | 0 | 99.6 |
| United Utilities | River Irwell | NEW HALL HEY BRIDGE CSO | 1 | 0 | 99.5 |
| United Utilities | Eagley Brook | BELMONT WWTW | 0 | 0 | 100 |
| United Utilities | Clvrtd Section Of River Darwen | RAILWAY ROAD/SOUTH STREET CSO | 0 | 0 | 99.2 |
| United Utilities | Whitewell Brook | 876 BURNLEY RD EAST CSO | 0 | 0 | 99.3 |
| United Utilities | River Darwen | BOLTON ROAD CSO | 0 | 0 | 99.3 |
| United Utilities | River Darwen | BELGRAVE ROAD CSO | 0 | 0 | 99.3 |
| United Utilities | Culverted River Irwell | WELLINGTON HOTEL CSO | 0 | 0 | 99.2 |
| United Utilities | Limy Water Irwell | BURNLEY RD/MIDDLEGATE CSO | 0 | 0 | 81.1 |
| United Utilities | Gleave Clough Brook | TONG LANE/REED STREET CSO | 0 | 0 | 99.2 |
| United Utilities | River Darwen | SUDELLSIDE STREET | 0 | 0 | 93 |
| United Utilities | River Darwen | QUEENS ROAD (DARWEN) CSO | 0 | 0 | 100 |
| United Utilities | River Darwen | WOODVALE FLATS CSO | 0 | 0 | 95.5 |
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.
Get in touch if you have queries or want to discuss our data.
press [at] top-of-the-poops.org