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Area of Outstanding Natural Beauty

Dedham Vale - 2025 Sewage

Polluted by sewage 76 hours in 2025 , monitoring offline 2,219 hours

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Area of Outstanding Natural Beauty

Totals for 2025

Sewage76 hours

Monitoring offline2,219 hours

Potential pollution0 hours

Storm overflows11

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Sewage pollution map of Dedham Vale, an Area of Outstanding Natural Beauty, showing where sewage is discharged

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Daily Data - when it rained, and when they spilled

Square = rainfall none → heavy

Drop = sewage minutes → all day

Potential pollution Monitoring offline

Jan - 42 hours

Feb - 0 hours

Mar - 0 hours

Apr - 0 hours

May - 1 hours

Jun - 0 hours

Jul - 0 hours

Aug - 0 hours , 680 offline

Sept - 1 hours , 684 offline

Oct - 2 hours

Nov - 28 hours , 85 offline

Dec - 0 hours , 744 offline

Daily data is experimental and data is not guaranteed to be accurate. Please inform us of any issue, we will fix.

Storm overflows in and around Dedham Vale

Company	Site Name	Receiving Waterway	Overflow Days	Total Duration (hours)	Offline/Potential Pollution
Anglian Water	BOXFORD STW	River Box	5	38h 9m	-
Anglian Water	BOXFORD STW	River Box	2	11h 14m	-
Anglian Water	LAWFORD-WIGNALL ST SP	Wignall Brook	1	8h 5m	-
Anglian Water	DEDHAM STW	Dedham Mill Tail- Rv Stour	2	7h 46m	-
Anglian Water	LAWFORD-WIGNALL ST SP	Wignall Brook	2	4h 44m	-
Anglian Water	East Bergholt WRC	Gosnalls Brook River Stour	2	3h 17m	1,365 h
Anglian Water	DEDHAM STW	Dedham Mill Tail- Rv Stour	1	2h	-
Anglian Water	East Bergholt WRC	Gosnalls Brook River Stour	1	0h 56m	853 h
Anglian Water	Brantham Factory Lane OV	River Stour	3	0h 45m	-
Anglian Water	BRANTHAM SCHOOL LANE SP	River Stour	0	0h	-
Anglian Water	Brantham Factory Lane OV	River Stour	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.

Analysing sewage pollution by the Water Industry

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© 2020-2025 Top-Of-The-Poops CC-BY-SA 4.0,
© Openstreetmap contributors, Contains OS data © Crown copyright and database right 2021-2025,
Contains Water UK National Storm Overflow Hub Data CC-BY-SA 4.0 and analysis © 2025 Top-Of-The-Poops

Some data reproduced under Open Government Licence

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