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Area of Outstanding Natural Beauty

Malvern Hills - 2025 Sewage

Polluted by sewage 1,871 hours in 2025 , monitoring offline 2,316 hours , potential overflows 123 hours

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Area of Outstanding Natural Beauty

Totals for 2025

Sewage1,871 hours

Monitoring offline2,316 hours

Potential pollution123 hours

Storm overflows8

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Sewage pollution map of Malvern Hills, 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 - 341 hours , 492 offline

Feb - 153 hours , 108 offline

Mar - 70 hours , 80 potential

Apr - 12 hours , 216 offline

May - 3 hours , 573 offline

Jun - 2 hours , 332 offline

Jul - 0 hours , 181 offline

Aug - 0 hours

Sept - 22 hours

Oct - 10 hours , 78 offline

Nov - 586 hours , 91 offline

Dec - 669 hours , 43 potential

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 Malvern Hills

Company	Site Name	Receiving Waterway	Overflow Days	Total Duration (hours)	Offline/Potential Pollution
Severn Trent Water	COLWALL STW (SSTO)	Cradley Brook	74	995h 31m	91 h
Severn Trent Water	COLWALL STW (SSTO)	Cradley Brook	23	302h 9m	92 h
Severn Trent Water	COLWALL - XXXX FARM PS (CSO)	Cradley Brook	18	245h 28m	-
Severn Trent Water	COLWALL - XXXX FARM PS (CSO)	Cradley Brook	26	200h 23m	349 h
Severn Trent Water	WEST MALVERN - DEWALDEN RD (CSO)	Cradley Brook\N	4	70h 4m	1,569 h
Severn Trent Water	MALVERN WELLS - SHUTTLEFAST FARM (CSO)	Mere Brook	12	52h 30m	337 h
Severn Trent Water	MALVERN WELLS - SHUTTLEFAST FARM (CSO)	Mere Brook	2	5h 30m	-
Severn Trent Water	WEST MALVERN - DEWALDEN RD (CSO)	Cradley Brook\N	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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