It's a Dirty Business

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Witham - 2025 Sewage

Polluted by sewage 3,297 hours in 2025 , monitoring offline 1,133 hours , potential overflows 1,054 hours

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

Which Year?

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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 Witham 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 - 534 hours
Feb - 181 hours
Mar - 3 hours
Apr - 74 hours
May - 9 hours
Jun - 3 hours
Jul - 41 hours , 591 potential
Aug - 0 hours , 462 potential
Sept - 18 hours
Oct - 78 hours
Nov - 1,777 hours , 365 offline
Dec - 571 hours , 0 potential
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Thank you so much to everyone who contributed to the site in 2025 to keep it running. We do rely on your contributions! Developing and running a website costs real money.
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Totals so far

Company Site Name Receiving Waterway Overflow Days Total Duration (hours) Offline/Potential Pollution
Anglian Water TOLLESHUNT KNIGHTS-BROOK R TPS Layer Brook 50 648 h 27m -
Anglian Water EARLS COLNE STW River Colne 30 616 h 21m -
Anglian Water HALSTEAD STW River Colne 30 578 h 54m -
Anglian Water KELVEDON-GREYS MILL SO River Blackwater 33 511 h 15m -
Anglian Water WITHAM STW Tidal River Chelmer 11 189 h 44m -
Anglian Water EARLS COLNE STW River Colne 8 106 h 52m -
Anglian Water GREAT TOTHAM STW Spicketts Brook Blackwater 10 98 h 15m -
Anglian Water Earls Colne Church Hill #3 Combined Sewer Overflow River Colne 41 72 h 55m -
Anglian Water Tollesbury Water Recycling Centre Tollesbury Fleet To Blackwater 6 71 h -
Anglian Water TIPTREE STW Virley Brook Salcottcreek 5 55 h 57m -
Anglian Water STISTED STW Stisted Brook River Blackwater 3 55 h 15m -
Anglian Water TOLLESHUNT KNIGHTS-FORGE SP Layer Brook 8 43 h 59m -
Anglian Water COPFORD STW Roman River 6 33 h 34m 1,054 h
Anglian Water TOLLESHUNT KNIGHTS-BROOK R TPS Layer Brook 7 31 h 12m -
Anglian Water TOLLESBURY-WOODROLFE RD OV Tollesbury Fleet 2 25 h 1,133 h
Anglian Water HALSTEAD STW River Colne 5 25 h -
Anglian Water GREAT TOTHAM STW Spicketts Brook Blackwater 3 24 h 30m -
Anglian Water TIPTREE-GORSE LA TPS Layer Brook 4 23 h 29m -
Anglian Water Maldon STW Pennys Brook 2 16 h 29m -
Anglian Water COPFORD STW Roman River 5 12 h 58m 0 h
Anglian Water COGGESHALL-EAST ST SO River Blackwater 3 11 h 45m -
Anglian Water Hatfield Peverel Crabbs Hill Terminal Pumping Station River Ter 3 11 h 37m -
Anglian Water LT TOTHAM-SCHOOL RD TPS Penny'S Brook River Blackwater 1 10 h -
Anglian Water STISTED STW Stisted Brook River Blackwater 2 10 h -
Anglian Water EARLS COLNE-COLCHESTER RD TPS River Colne 3 3 h 50m -
Anglian Water KELVEDON-GREYS MILL SO River Blackwater 3 2 h 15m -
Anglian Water TIPTREE-GORSE LA TPS Layer Brook 1 2 h -
Anglian Water KELVEDON-STATION RD SO Blackwater 5 1 h 14m -
Anglian Water TIPTREE STW Virley Brook Salcottcreek 1 1 h 14m -
Anglian Water COGGESHALL STW River Blackwater 1 1 h 7m -
Anglian Water Earls Colne St Andrews Church Combined Sewer Overflow River Colne 2 0 h 35m -
Anglian Water Earls Colne Church Hill #3 Combined Sewer Overflow River Colne 2 0 h 22m -
Anglian Water EARLS COLNE-COLCHESTER RD TPS River Colne 2 0 h 20m -
Anglian Water KELVEDON-EASTERFORD RD SO Blackwater 1 0 h 15m -
Anglian Water COGGESHALL-EAST ST R O #18 OV River Blackwater 0 0 h -
Anglian Water Hatfield Peverel Crabbs Hill Terminal Pumping Station River Ter 0 0 h -
Anglian Water WHITE NOTLEY STW River Brain 0 0 h -
Anglian Water Tolleshunt D'Arcy Sewage Treatment Works Bowstead Brook River Blackwate 0 0 h -
Anglian Water COGGESHALL-EAST ST SO River Blackwater 0 0 h -
Anglian Water KELVEDON-EASTERFORD RD SO Blackwater 0 0 h -
Anglian Water Tolleshunt D'Arcy Sewage Treatment Works Bowstead Brook River Blackwate 0 0 h -
Anglian Water COGGESHALL-EAST ST R O #18 OV River Blackwater 0 0 h -
Anglian Water TOLLESHUNT KNIGHTS-FORGE SP Layer Brook 0 0 h -
Anglian Water Tollesbury Water Recycling Centre Tollesbury Fleet To Blackwater 0 0 h -
Anglian Water WHITE NOTLEY STW River Brain 0 0 h -
Anglian Water COGGESHALL STW River Blackwater 0 0 h -
Anglian Water WITHAM STW Tidal River Chelmer 0 0 h -
Anglian Water Maldon STW Pennys Brook 0 0 h -
Anglian Water LT TOTHAM-SCHOOL RD TPS Penny'S Brook River Blackwater 0 0 h -
Anglian Water Earls Colne St Andrews Church Combined Sewer Overflow River Colne 0 0 h -
Anglian Water KELVEDON-STATION RD SO Blackwater 0 0 h -
Anglian Water WHITE NOTLEY-TPS River Brain 0 0 h -

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

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.