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Runnymede and Weybridge

Polluted by sewage 86 times in 2025 lasting 1,211 hours

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

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Live data for Runnymede and Weybridge in 2026

So far this year (as of 15 Apr 2026, 05:00) there has been 1,198 hours of sewage overflows, from 10 CSO Combined Sewage Overflow - a device that, when operating, pours combined rainwater & sewage into a waterway s

Totals for Runnymede and Weybridge in 2025

5 Sites polluted by Thames Water
86 sewage dumps
1,211 hours duration
That's 1.68 months. 1.7 times a week, on average

Change Over Time

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Constituencies near Runnymede and Weybridge

Waterways in Runnymede and Weybridge

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Pollution Summary 2025

Here are all the reported sewage overflow totals for Runnymede and Weybridge in 2025. Sometimes sewage can be being dumped for months at a time.

Reporting refers to how much of the time the monitoring was active. In this constituency all the declared CSO Combined Sewage Overflow - a device that, when operating, pours combined rainwater & sewage into a waterway s appeared to have monitoring enabled for more than 50% of the year

Company Waterway Site Sewage Dumps Duration (Hours) Reporting %
Thames Water Bourne CHERTSEY STW, LYNE LANE, CHERTSEY, 27 472 97.5
Thames Water River Wey WEYBRIDGE WWTW 28 426 100
Thames Water Mole Cobham Bridge, Adj Cobham Ps 24 268 99.8
Thames Water River Mole SWS, STOKE ROAD, COBHAM, SURREY 6 44 95.7
Thames Water Rive Ditch SURFACE WATER SEWER 1 0 98.7

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.

Top of the Poops

Analysing sewage pollution by the Water Industry

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

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