Polluted by sewage 1,639 hours in 2025
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We get information about overflowing CSOs since January 2025. Here is a chart of the last three months of data for Blackley and Middleton South, 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 Now| Company | Site Name | Receiving Waterway | Overflow Days | Total Duration (hours) | Total Duration (days) |
|---|---|---|---|---|---|
| United Utilities | Rochdale Road/Collyhurst CSO | River Irk | 74 | 296 h 6m | 12.33 |
| United Utilities | Moston Lane/Rochdale Road CSO | River Irk | 53 | 187 h 52m | 7.79 |
| United Utilities | Boothroyden Road CSO | River Irk | 58 | 186 h 15m | 7.75 |
| United Utilities | Rochdale Road/Collyhurst CSO | River Irk | 21 | 131 h 14m | 5.46 |
| United Utilities | Cleveland/Delauney's Road CSO | River Irk | 30 | 115 h 14m | 4.79 |
| United Utilities | MIDDLETON MAIN OUTFALL CSO | River Irk | 44 | 114 h 30m | 4.75 |
| United Utilities | Mainway/Worcester Road CSO | Boardman Brook | 21 | 84 h 6m | 3.5 |
| United Utilities | Boothroyden Road CSO | River Irk | 16 | 80 h 36m | 3.33 |
| United Utilities | Middleton Old Road CSO (Site ID - 28064/28CSO143) | River Irk | 31 | 76 h 34m | 3.17 |
| United Utilities | MIDDLETON MAIN OUTFALL CSO | River Irk | 13 | 43 h 50m | 1.79 |
| United Utilities | Whiteley Drive CSO | Wince Brook | 23 | 41 h 6m | 1.71 |
| United Utilities | Mainway/Worcester Road CSO | Boardman Brook | 6 | 32 h 50m | 1.33 |
| United Utilities | Middleton Old Road CSO (Site ID - 28064/28CSO143) | River Irk | 7 | 26 h 14m | 1.08 |
| United Utilities | Mill Brow/Blackley Road CSO | Culverted River Irk | 20 | 26 h 12m | 1.08 |
| United Utilities | Moston Lane/Rochdale Road CSO | River Irk | 6 | 21 h 52m | 0.88 |
| United Utilities | BLACKLEY NEW ROAD CSO | River Irk | 17 | 20 h 34m | 0.83 |
| United Utilities | Greengate CSO | Wince Brook | 14 | 17 h 41m | 0.71 |
| United Utilities | MIDDLETON ROAD / VICTORIA AVENUE CSO | River Irk | 5 | 15 h 40m | 0.62 |
| United Utilities | POTTERS LANE CSO | Culverted Section Moston Brook | 14 | 14 h 45m | 0.58 |
| United Utilities | Kendall Road (Blackley) Combined Sewer Overflow | River Irk Via Birch Brook Clvr | 3 | 11 h 50m | 0.46 |
| United Utilities | Smedley Road CSO | River Irk | 9 | 11 h 1m | 0.46 |
| United Utilities | QUEENS ROAD CSO | Moss Brook | 13 | 10 h 24m | 0.42 |
| United Utilities | VICTORIA AVENUE/RIVER IRK CSO | River Irk | 5 | 10 h 14m | 0.42 |
| United Utilities | Rochdale/Collyhurst Road CSO | Culv'Ted Section Of Moss Brook | 11 | 7 h 34m | 0.29 |
| United Utilities | Mill Brow/Blackley New Road CSO | A Culverted Section River Irk | 4 | 7 h 32m | 0.29 |
| United Utilities | Chudleigh Road CSO | River Irk Via Sws | 9 | 6 h 45m | 0.25 |
| United Utilities | Queens Road/Hendham Vale CSO | Culverted Section Moston Brook | 3 | 5 h 20m | 0.21 |
| United Utilities | Mill Brow/Blackley Road CSO | Culverted River Irk | 7 | 5 h 14m | 0.21 |
| United Utilities | LATHBURY ROAD / SILCHESTER DRIVE CSO | Moston Brook | 8 | 4 h 42m | 0.17 |
| United Utilities | Mainway/Lincoln Road Combined Sewer Overflow | Wince Brook Via Sws | 5 | 4 h 3m | 0.17 |
| United Utilities | Manchester New Road Combined Sewer Overflow | Boardman Brook | 7 | 3 h 48m | 0.12 |
| United Utilities | Blackley New Road CSO | River Irk | 4 | 3 h 27m | 0.12 |
| United Utilities | Waterloo Street/Crescent Road CSO | River Irk | 7 | 3 h 24m | 0.12 |
| United Utilities | Rochdale/Collyhurst Road CSO | Culv'Ted Section Of Moss Brook | 1 | 1 h 52m | 0.04 |
| United Utilities | Cleveland Road/Delaunays CSO | River Irk | 5 | 1 h 30m | 0.04 |
| United Utilities | Manchester Old Road CSO | River Irk | 4 | 1 h 30m | 0.04 |
| United Utilities | Glenbrook Road/Dexter Road CSO | River Irk | 6 | 1 h 2m | 0.04 |
| United Utilities | Waterloo Street/Crescent Road CSO | River Irk | 1 | 0 h 48m | 0 |
| United Utilities | Central Avenue CSO | River Irk | 1 | 0 h 38m | 0 |
| United Utilities | POTTERS LANE CSO | Culverted Section Moston Brook | 1 | 0 h 30m | 0 |
| United Utilities | Burton Street near Dalton Street CSO | River Irk | 2 | 0 h 30m | 0 |
| United Utilities | Victoria Avenue/Glenbrook CSO | River Irk Via Sws | 2 | 0 h 28m | 0 |
| United Utilities | Victoria Avenue/Glenbrook CSO | River Irk Via Sws | 1 | 0 h 26m | 0 |
| United Utilities | Queens Road/Scorpton Street CSO | Culverted Section Moston Brook | 1 | 0 h 20m | 0 |
| United Utilities | Greengate CSO | Wince Brook | 1 | 0 h 16m | 0 |
| United Utilities | QUEENS ROAD CSO | Moss Brook | 1 | 0 h 14m | 0 |
| United Utilities | MONSALL ROAD (J SEWER) CSO | Culverted Moston Brook | 1 | 0 h 14m | 0 |
| United Utilities | Rochdale Road/Alfreton Street CSO | River Irk | 2 | 0 h 14m | 0 |
| United Utilities | Cleveland/Delauney's Road CSO | River Irk | 2 | 0 h 12m | 0 |
| United Utilities | ROCHDALE ROAD / EGGINGTON STREET CSO | Moston Brook | 1 | 0 h 12m | 0 |
| United Utilities | Dexter Road/Heaton Park Road CSO | River Irk | 1 | 0 h 8m | 0 |
| United Utilities | Kingsbridge Road CSO | River Irk | 1 | 0 h 2m | 0 |
| United Utilities | Queens Road/Scorpton Street CSO | Culverted Section Moston Brook | 0 | 0 h | 0 |
| United Utilities | South Blackley New Road CSO | River Irk | 0 | 0 h | 0 |
| United Utilities | South Blackley New Road CSO | River Irk | 0 | 0 h | 0 |
| United Utilities | Cleveland Road/Delaunays CSO | River Irk | 0 | 0 h | 0 |
| United Utilities | VICTORIA AVENUE/RIVER IRK CSO | River Irk | 0 | 0 h | 0 |
| United Utilities | Hendham Vale CSO | River Irk | 0 | 0 h | 0 |
| United Utilities | Mossway CSO | Boardman Brook | 0 | 0 h | 0 |
| United Utilities | BRENTFORD STREET CSO | Unnamed Watercourse | 0 | 0 h | 0 |
| United Utilities | WINDSOR ROAD / WINTERDYNE STREET CSO | Moston Brook | 0 | 0 h | 0 |
| United Utilities | BRENTFORD STREET CSO | Unnamed Watercourse | 0 | 0 h | 0 |
| United Utilities | Lathbury Road (Adjacent to the footpath) Combined Sewer Overflow | Moston Brook | 0 | 0 h | 0 |
| United Utilities | Kenyon Lane CSO | River Irk | 0 | 0 h | 0 |
| United Utilities | Mill Brow/Blackley New Road CSO | A Culverted Section River Irk | 0 | 0 h | 0 |
| United Utilities | Mossway CSO | Boardman Brook | 0 | 0 h | 0 |
| United Utilities | ROCHDALE ROAD / EGGINGTON STREET CSO | Moston Brook | 0 | 0 h | 0 |
| United Utilities | Kendall Road (Blackley) Combined Sewer Overflow | River Irk Via Birch Brook Clvr | 0 | 0 h | 0 |
| United Utilities | Manchester Old Road CSO | River Irk | 0 | 0 h | 0 |
| United Utilities | Burton Street near Dalton Street CSO | River Irk | 0 | 0 h | 0 |
| United Utilities | BLACKLEY NEW ROAD CSO | River Irk | 0 | 0 h | 0 |
| United Utilities | MIDDLETON ROAD / VICTORIA AVENUE CSO | River Irk | 0 | 0 h | 0 |
| United Utilities | Mainway/Lincoln Road Combined Sewer Overflow | Wince Brook Via Sws | 0 | 0 h | 0 |
| United Utilities | Glenbrook Road/Dexter Road CSO | River Irk | 0 | 0 h | 0 |
| United Utilities | Chudleigh Road CSO | River Irk Via Sws | 0 | 0 h | 0 |
| United Utilities | Dexter Road/Heaton Park Road CSO | River Irk | 0 | 0 h | 0 |
| United Utilities | Queens Road/Hendham Vale CSO | Culverted Section Moston Brook | 0 | 0 h | 0 |
| United Utilities | Whiteley Drive CSO | Wince Brook | 0 | 0 h | 0 |
| United Utilities | Rochdale Road/Alfreton Street CSO | River Irk | 0 | 0 h | 0 |
| United Utilities | Lathbury Road (Adjacent to the footpath) Combined Sewer Overflow | Moston Brook | 0 | 0 h | 0 |
| United Utilities | MONSALL ROAD (J SEWER) CSO | Culverted Moston Brook | 0 | 0 h | 0 |
| United Utilities | Kingsbridge Road CSO | River Irk | 0 | 0 h | 0 |
| United Utilities | Smedley Road CSO | River Irk | 0 | 0 h | 0 |
| United Utilities | Blackley New Road CSO | River Irk | 0 | 0 h | 0 |
| United Utilities | Manchester New Road Combined Sewer Overflow | Boardman Brook | 0 | 0 h | 0 |
| United Utilities | Kenyon Lane CSO | River Irk | 0 | 0 h | 0 |
| United Utilities | Hendham Vale CSO | River Irk | 0 | 0 h | 0 |
| United Utilities | WINDSOR ROAD / WINTERDYNE STREET CSO | Moston Brook | 0 | 0 h | 0 |
| United Utilities | Central Avenue CSO | River Irk | 0 | 0 h | 0 |
| United Utilities | LATHBURY ROAD / SILCHESTER DRIVE CSO | Moston Brook | 0 | 0 h | 0 |
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.