Top of the Poops | Constituency Sewage Map

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Which Year?

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Constituency

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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 Wimbledon so far for 2026. It is an estimate, based on very poor quality live data from the Water Companies. The water companies report their sewage to the Environment Agency every year in April. You can see the last reported year in the other page

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.

Totals for Wimbledon in 2026

Sewage12 hours

Monitoring offline1,626 hours

Potential pollution0 hours

Storm overflows14

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Constituencies near Wimbledon

Daily Data

Jan - 0 hours , 372 offline

Feb - 0 hours

Mar - 6 hours , 77 offline

Apr - 5 hours , 485 offline

May - 0 hours , 247 offline

Jun - 0 hours

Jul - 0 hours

Aug - 0 hours , 377 offline

Sept - 0 hours , 7 offline

Oct - 0 hours , 58 offline

Daily data is experimental and data is not guaranteed to be accurate. Please inform us of any issue, we will fix.
Please note: We don't have rainfall data for Wales. If you know where to source it please let us know!

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Company	Site Name	Receiving Waterway	Overflow Days	Total Duration (hours)	Offline/Potential Pollution
Thames Water	Bushey court, raynes park	Beverley Brook	7	12h 30m	120 h
Thames Water	Westway Close (Raynes Park) SPS	Old Pyl Ditch	0	0h	77 h
Thames Water	Church Road	N/A	0	0h	385 h
Thames Water	Gap road (cemetery)	River Wandle	0	0h	58 h
Thames Water	Worple road, sw19	Beverley Brook	0	0h	-
Thames Water	Home Park Road	N/A	0	0h	-
Thames Water	Home Park Road	N/A	0	0h	-
Thames Water	Worple road, sw19	Beverley Brook	0	0h	-
Thames Water	Bushey court, raynes park	Beverley Brook	0	0h	-
Thames Water	Gap road (cemetery)	River Wandle	0	0h	-
Thames Water	Wimbledon Hill Road	River Wandle	0	0h	737 h
Thames Water	Wimbledon Hill Road	River Wandle	0	0h	-
Thames Water	Somerset Road, Wimbledon	N/A	0	0h	247 h
Thames Water	Westway Close (Raynes Park) SPS	Old Pyl Ditch	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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Wimbledon - Live Sewage