Bassetlaw was polluted by sewage 575 times in 2024
lasting 5,450 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 Bassetlaw in 2025
So far this year (as of Apr 16, 2025, 6:30 PM) there has been 1,171 hours of sewage overflows
Totals for Bassetlaw in 2024
20 Sites polluted by Severn Trent Water
575 sewage dumps
5,450 h duration
That's 7.57 months. On average 1.6 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 Bassetlaw, 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 Bassetlaw 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 20 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 %
Severn Trent Water Carlton Beck HODSOCK WASTEWATER TREATMENT WORKS 116 1,810 97.6
Severn Trent Water River Poulter NORTON STW 65 834 99.8
Severn Trent Water River Poulter LANGWITH CSO 91 608 99.7
Severn Trent Water River Ryton WORKSOP (MANTON) STW 50 551 99.8
Severn Trent Water River Idle RETFORD SEWAGE TREATMENT WORKS 31 321 97.2
Severn Trent Water River Idle/Maun/Carr Dyke AREAS OF EAST RETFORD/STM/EMERG OF 29 216 100
Severn Trent Water River Trent WALKERINGHAM STW 27 211 100
Severn Trent Water Harworth Sewage Dyke HARWORTH SEWAGE TREATMENT WORKS 34 178 100
Severn Trent Water Tetheringrass Drain TETHERINGRASS LANE PUMPING STATION 20 133 100
Severn Trent Water River Poulter NETHER LANGWITH STW 25 129 95.1
Severn Trent Water Millwood Brook - Creswell Arm CRESWELL SEWAGE PUMPING STATION 32 126 100
Severn Trent Water Harworth Dyke HARWORTH PUMPING STATION 15 85 100
Severn Trent Water River Idle BRACKEN LANE PUMPING STATION 7 84 100
Severn Trent Water Walling Wells Brook CARLTON SPS - STORM/EMERGENCY OF 12 67 94.8
Severn Trent Water Oldcoates Dyke BLYTH (NORNAY) PUMPING STATION 6 36 91.9
Severn Trent Water River Idle LONDON ROAD CSO 6 35 95.2
Severn Trent Water River Idle MATTERSEY THORPE STW 3 9 100
Severn Trent Water River Idle CHURCH HOUSE PUMPING STATION 2 3 100
Severn Trent Water River Ryton BAWTRY ROAD PUMPING STATION 3 2 84.9
Severn Trent Water Unnamed Ranskill Brook RANSKILL SEWAGE TREATMENT WORKS 1 2 100

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.