Bolton South and Walkden was polluted by sewage 1,466 times in 2024
lasting 5,896 hours

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Contains OS Data © Crown copyright & database right 2021-2024
© Top of the Poops 2021-2024
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✔ means we have experimental daily data since 2023
Live data for Bolton South and Walkden in 2025
So far this year (as of Apr 16, 2025, 6:15 PM) there has been 1,122 hours of sewage overflows
Totals for Bolton South and Walkden in 2024
30 Sites polluted by United Utilities
1,466 sewage dumps
5,896 h duration
That's 8.19 months. On average 4 times a day
Change Over Time
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Daily Data
We get information about overflowing CSOs since January 2025. Here is a chart of the last three months of data for Bolton South and Walkden, 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.
     Monitoring Online      Monitoring Offline      Polluting      Potentially Polluting      Unknown
Daily data is experimental and data is not guaranteed to be accurate. Please inform us of any issue, we will fix.

Pollution Summary 2024

Here are all the reported sewage overflow totals for Bolton South and Walkden 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 0 of the total 37 CSO locations had reporting enabled for less than half the year, of which 0 had zero reporting.

Company Waterway Site Sewage Dumps Duration (Hours) Reporting %
United Utilities River Irwell BOLTON WASTEWATER TREATMENT WORKS 159 1,223 100
United Utilities Little Hulton Stream WORSLEY STW 158 949 100
United Utilities River Croal HACKEN WORKS CSO 133 757 100
United Utilities Unity Brook HULTON LANE ENDS STW 79 605 99.5
United Utilities Croal Minor 91 MANCHESTER ROAD CSO 072GO 141 372 98.2
United Utilities Tanner Hole Brook ADELAIDE STREET CSO 76 345 100
United Utilities River Croal CAMMERCLOUGH ROAD CSO 109 335 99.9
United Utilities River Irwell KEARSLEY PS 34 219 98
United Utilities Middle Brook NO 76 MIDDLE BROOK CSO 115 218 97.3
United Utilities Singing Clough Brook STONEHILL ROAD CSO 072TV 43 134 94.1
United Utilities Clvrt Singing Clough Brook STONECLOUGH ROAD CSO 07045 55 122 100
United Utilities Jenny Beck Rvr Croal WESTON ST VIKING ST CSO BOL0115 51 111 99.8
United Utilities Ellen Brook Culvert TYNESBANK 33 96 98.3
United Utilities Jenny Beck, Rv Croal RISHTON LANE/WESTON STREET CSO 52 84 100
United Utilities Honksford Brook CSO SOUTH OF ASHAWE GROVE 26 82 33.5
United Utilities Culvrt Singing Clough Brook STONEHILL ROAD CSO 07049 31 60 99.5
United Utilities Ellen Brook NEWEARTH ROAD CSO 29 51 100
United Utilities River Croal SPRINGFIELD TANK CSO 31 37 93.9
United Utilities Croal Minor ORLANDO STREET CSO 078J3 16 21 99
United Utilities River Croal HALL LANE 20 19 100
United Utilities Clvrt River Irwell SINGING CLOUGH CSO 071Q8 13 15 95.4
United Utilities River Croal STPETERS WAY/SPRINGFIELD IND ES CSO 20 10 99.4
United Utilities Middle Brook BLACKSHAW LANE CSO 072FW 15 10 99
United Utilities Honksford Brook CSO SOUTH OF ASHAWE GROVE 5 6 99.3
United Utilities River Croal FERN STREET CSO (078J3) 11 3 98.8
United Utilities Honksford Brook Via Sws BEECH GROVE CSO 4 1 99.5
United Utilities A Culverted Section Jenny Beck LEVER STREET NO1 CSO 2 0 99.2
United Utilities Singing Clough Brook STONEHILL TRADING ESTATE CSO 1 0 99.2
United Utilities Croal Minor CHURCH BANK RAILWAY VIADUCT CSO 2 0 98.8
United Utilities Jenny Beck Culvert River Croal CROFT LN MANCHESTER RD CSO BOL0206 2 0 99.4
United Utilities Middle Brook Via Sws CALEDONIA ST HIBERNIA ST CSO 071IB 0 0 99.5
United Utilities River Irwell RIVERSIDE CSO BOLTO BOL0058 0 0 99.2
United Utilities Worsley Brook WALKDEN RD HOLYOAKE RD CSO 37045 0 0 5
United Utilities Astley Brook LITTLE HULTON CSO 0 0 84.4
United Utilities Jenny Beck BRIDGEMAN ST HIGHER SWAN LANE CSO 0 0 98.1
United Utilities Jenny Beck Rvr Croal LEVER STREET NO 5 CSO 078CD 0 0 98.9
United Utilities Croal Minor CHURCH BANK (SIDE OF VIADUCT) CSO 0 0 96.8

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.