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Bassetlaw - 2025 Sewage

Polluted by sewage 3,715 hours in 2025 , monitoring offline 3,676 hours , potential overflows 308 hours

© OpenStreetMap contributors
Contains OS Data © Crown copyright & database right 2021-2024
© Top of the Poops 2021-2024

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View Annual Sewage Data

You're looking at the totals that we have calculated for sewage in Bassetlaw for 2025. It is an estimate, based on very poor quality live data from the Water Companies. This may not align with the 'official' reported sewage values from the water companies, which is reported in April following then end of the year - so 2025 numbers are reported in April 2026.

What's a potential overflow? If the CSO goes 'Offline' while its Overflowing, we don't know if it stopped overflowing until we get a 'Stop' event.

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Daily Data

Jan - 1,019 hours , 81 potential
Feb - 61 hours , 217 offline
Mar - 68 hours , 13 potential
Apr - 18 hours , 420 offline
May - 180 hours , 13 potential
Jun - 110 hours , 857 offline
Jul - 59 hours , 19 offline
Aug - 1 hours
Sept - 111 hours , 91 offline
Oct - 68 hours , 185 potential
Nov - 1,117 hours , 14 potential
Dec - 898 hours , 219 offline
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Totals so far

Company Site Name Receiving Waterway Overflow Days Total Duration (hours) Offline/Potential Pollution
Severn Trent Water HODSOCK STW (SSTO) Carlton Beck 65 1,021h 8m 56 h
Severn Trent Water HODSOCK STW (SSTO) Carlton Beck 36 666h 30m -
Severn Trent Water CRESWELL - CRAGS ROAD PS (CSO) Millwood Brook - Creswell Arm 38 315h 36m 105 h
Severn Trent Water WALKERINGHAM STW (SSTO) River Trent 17 184h 13m 17 h
Severn Trent Water RETFORD STW (SSTO) River Idle 14 125h 9m 96 h
Severn Trent Water NORTON (STW) River Poulter 22 109h 24m 11 h
Severn Trent Water WORKSOP - MANTON STW (SSTO) River Ryton 10 102h 39m 1,897 h
Severn Trent Water OLDCOTES - BLYTH ROAD (SSO) Radford Brook 8 94h 48m -
Severn Trent Water NETHER LANGWITH STW (SSTO) River Poulter 13 92h 2m -
Severn Trent Water WORKSOP - MANTON STW 6DWF (CSO) River Ryton 32 88h 35m -
Severn Trent Water RETFORD - BOLHAM LANE PS (CSO) Carr Dyke 14 86h 34m 185 h
Severn Trent Water HARWORTH STW (SSTO) Harworth Sewage Dyke 11 83h 35m -
Severn Trent Water NETHER LANGWITH - MAIN ROAD (CSO) River Poulter 28 70h 21m 41 h
Severn Trent Water BECKINGHAM - TETHERING GRASS LANE (SSO) Tetheringrass Drain 9 66h 41m -
Severn Trent Water WORKSOP - MANTON STW (SSTO) River Ryton 7 57h 59m -
Severn Trent Water LANGWITH - THE WOODLANDS (CSO&EO) Dry Ditch 8 55h 28m 109 h
Severn Trent Water RETFORD STW (SSTO) River Idle 8 53h 50m -
Severn Trent Water CARLTON IN LINDRICK -WATER LA FOUL (SSO) Walling Wells Brook 8 53h 44m 171 h
Severn Trent Water BECKINGHAM - TETHERING GRASS LANE (SSO) Tetheringrass Drain 10 53h 22m -
Severn Trent Water HARWORTH - CHURCH ENTRANCE (SSO) Harworth Dyke 11 47h 53m -
Severn Trent Water WHALEY THORNS - MAIN RD/LIMES AVE (SO) River Poulter 43 32h 53m -
Severn Trent Water CRESWELL - CRAGS ROAD PS (CSO) Millwood Brook - Creswell Arm 9 24h 26m -
Severn Trent Water HARWORTH STW (CSO) Harworth Sewage Dyke 17 24h 12m -
Severn Trent Water RETFORD - KINGS PARK (CSO) River Idle/Maun/Carr Dyke 2 22h 10m 225 h
Severn Trent Water RANSKILL STW (SSTO) Ranskill Brook 5 21h 37m 18 h
Severn Trent Water MATTERSEY THORPE (STW) River Idle 3 21h 7m 30 h
Severn Trent Water HARWORTH - CHURCH WALK (CSO) Harworth Sewage Dike 4 19h 50m 192 h
Severn Trent Water NETHER LANGWITH STW (SSTO) River Poulter 4 18h 22m -
Severn Trent Water RETFORD - BOLHAM LANE PS (CSO) Carr Dyke 3 16h 45m -
Severn Trent Water NETHER LANGWITH - MAIN ROAD (CSO) River Poulter 9 15h 8m -
Severn Trent Water BLYTH NORNAY - BAWTRY ROAD (SSO) Oldcoates Dyke 7 14h 25m 42 h
Severn Trent Water WALKERINGHAM STW (SSTO) River Trent 2 12h 25m -
Severn Trent Water WORKSOP - EASTGATE (CSO) River Ryton 10 9h 40m 258 h
Severn Trent Water BLYTH - BAWTRY ROAD (SSO) River Ryton 3 7h 2m -
Severn Trent Water HARWORTH STW (CSO) Harworth Sewage Dyke 5 4h 54m -
Severn Trent Water NORTON (STW) River Poulter 5 4h 41m -
Severn Trent Water HARWORTH STW (SSTO) Harworth Sewage Dyke 1 3h 55m -
Severn Trent Water RETFORD - KINGS PARK (CSO) River Idle/Maun/Carr Dyke 1 3h 49m -
Severn Trent Water HARWORTH - CHURCH ENTRANCE (SSO) Harworth Dyke 1 2h 24m -
Severn Trent Water WORKSOP - MANTON STW 6DWF (CSO) River Ryton 2 1h 49m -
Severn Trent Water MATTERSEY - CHURCH HOUSE (SSO) River Idle 1 1h 16m -
Severn Trent Water HARWORTH - CHURCH WALK (CSO) Harworth Sewage Dike 1 1h 14m -
Severn Trent Water WORKSOP - EASTGATE (CSO) River Ryton 2 0h 57m -
Severn Trent Water LONDON RD (CSO) River Idle 2 0h 28m -
Severn Trent Water WORKSOP - KILTON HILL (CSO) River Ryton 1 0h 7m 120 h
Severn Trent Water CARLTON IN LINDRICK -WATER LA FOUL (SSO) Walling Wells Brook 0 0h -
Severn Trent Water LANGWITH - THE WOODLANDS (CSO&EO) Dry Ditch 0 0h 183 h
Severn Trent Water RETFORD - BRACKEN LANE (SSO) Retford Beck 0 0h 18 h
Severn Trent Water BLYTH - BAWTRY ROAD (SSO) River Ryton 0 0h 122 h
Severn Trent Water WORKSOP - KILTON HILL (CSO) River Ryton 0 0h -
Severn Trent Water OLDCOTES - BLYTH ROAD (SSO) Radford Brook 0 0h -
Severn Trent Water RANSKILL STW (SSTO) Ranskill Brook 0 0h -
Severn Trent Water LONDON RD (CSO) River Idle 0 0h -
Severn Trent Water MATTERSEY - CHURCH HOUSE (SSO) River Idle 0 0h -
Severn Trent Water BLYTH NORNAY - BAWTRY ROAD (SSO) Oldcoates Dyke 0 0h 81 h
Severn Trent Water MATTERSEY THORPE (STW) River Idle 0 0h -

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. Live sewage data from Stream Water API

Annual figures up to and including 2025 come from official water company returns. The 2026 figure is our own estimate, derived continuously from the companies' live data feeds.

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.