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Cheltenham - 2025 Sewage

Polluted by sewage 292 hours in 2025 , monitoring offline 479 hours , potential overflows 33 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 live data (𝑥 if not)

View Annual Sewage Data

You're looking at the totals that we have calculated for sewage in Cheltenham 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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Constituencies near Cheltenham

Daily Data

Jan - 18 hours , 437 offline
Feb - 1 hours , 25 offline
Mar - 0 hours , 5 offline
Apr - 0 hours
May - 0 hours , 4 offline
Jun - 84 hours , 7 potential
Jul - 0 hours
Aug - 0 hours
Sept - 52 hours
Oct - 0 hours
Nov - 55 hours , 25 potential
Dec - 80 hours , 0 potential
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Totals so far

Company Site Name Receiving Waterway Overflow Days Total Duration (hours) Offline/Potential Pollution
Severn Trent Water BENHALL - WHITTINGTON ROAD (CSO) Hatherley Brook 16 197h 37m 42 h
Severn Trent Water BENHALL - WHITTINGTON ROAD (CSO) Hatherley Brook 7 72h 29m 0 h
Severn Trent Water CHARLTON KINGS - DOWDSWELL STORM (CSO) River Chelt 13 14h 15m 455 h
Severn Trent Water CHARLTON KINGS - DOWDSWELL STORM (CSO) River Chelt 1 7h 44m -
Severn Trent Water CHELTENHAM - ARLE SWO (CSO) River Chelt 0 0h 13 h
Severn Trent Water CHELTENHAM - ARLE SWO (CSO) River Chelt 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.