Bolton South and Walkden was polluted by sewage 1,945 times in 2023
lasting 8,271 hours
- 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 Bolton South and Walkden in 2023
32 Sites polluted by United Utilities
1,945 sewage dumps
8,271 h duration
That's 11.49 months. On average 5.3 times a day
Change Over Time
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Pollution Summary 2023

Here are all the reported sewage overflow totals for Bolton South and Walkden 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 37 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 Irwell BOLTON WASTEWATER TREATMENT WORKS 233 2,145 100
United Utilities Little Hulton Stream WORSLEY STW 222 1,327 99.17
United Utilities River Croal HACKEN WORKS CSO 166 1,148 99.2
United Utilities Tanner Hole Brook ADELAIDE STREET CSO 100 540 100
United Utilities Unity Brook HULTON LANE ENDS STW 80 526 97.8
United Utilities River Croal CAMMERCLOUGH ROAD CSO 129 421 91.9
United Utilities River Irwell KEARSLEY PS 88 396 90.3
United Utilities Croal Minor 91 MANCHESTER ROAD CSO 072GO 108 357 50.1
United Utilities Middle Brook NO 76 MIDDLE BROOK CSO 128 283 100
United Utilities Singing Clough Brook STONEHILL ROAD CSO 072TV 57 180 100
United Utilities Clvrt Singing Clough Brook STONECLOUGH ROAD CSO 07045 71 145 100
United Utilities Astley Brook LITTLE HULTON CSO 58 141 96
United Utilities Honksford Brook CSO SOUTH OF ASHAWE GROVE 54 123 100
United Utilities Jenny Beck Rvr Croal WESTON ST VIKING ST CSO BOL0115 71 121 100
United Utilities Ellen Brook Culvert TYNESBANK 57 118 100
United Utilities Jenny Beck, Rv Croal RISHTON LANE/WESTON STREET CSO 63 77 100
United Utilities Culvrt Singing Clough Brook STONEHILL ROAD CSO 07049 42 69 79.3
United Utilities Ellen Brook NEWEARTH ROAD CSO 51 61 100
United Utilities Clvrt River Irwell SINGING CLOUGH CSO 071Q8 23 23 100
United Utilities River Croal HALL LANE 26 13 100
United Utilities Croal Minor ORLANDO STREET CSO 078J3 19 12 96.8
United Utilities River Croal STPETERS WAY/SPRINGFIELD IND ES CSO 28 12 98.5
United Utilities Middle Brook BLACKSHAW LANE CSO 072FW 21 11 100
United Utilities River Croal SPRINGFIELD TANK CSO 17 4 100
United Utilities River Croal FERN STREET CSO (078J3) 15 3 100
United Utilities Croal Minor CHURCH BANK RAILWAY VIADUCT CSO 7 0 100
United Utilities Honksford Brook CSO SOUTH OF ASHAWE GROVE 1 0 100
United Utilities Jenny Beck Culvert River Croal CROFT LN MANCHESTER RD CSO BOL0206 4 0 100
United Utilities A Culverted Section Jenny Beck LEVER STREET NO1 CSO 2 0 100
United Utilities Jenny Beck Rvr Croal LEVER STREET NO 5 CSO 078CD 2 0 100
United Utilities Honksford Brook Via Sws BEECH GROVE CSO 1 0 100
United Utilities Middle Brook Via Sws CALEDONIA ST HIBERNIA ST CSO 071IB 1 0 100
United Utilities Worsley Brook WALKDEN RD HOLYOAKE RD CSO 37045 0 0 0
United Utilities Jenny Beck BRIDGEMAN ST HIGHER SWAN LANE CSO 0 0 100
United Utilities Croal Minor CHURCH BANK (SIDE OF VIADUCT) CSO 0 0 100
United Utilities Singing Clough Brook STONEHILL TRADING ESTATE CSO 0 0 100
United Utilities River Irwell RIVERSIDE CSO BOLTO BOL0058 0 0 99.9

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.