Esher and Walton was polluted by sewage 129 times in 2023
lasting 1,560 hours
- but monitoring was disabled in some locations, so could be more

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Contains OS Data © Crown copyright & database right 2021-2023
© Top of the Poops 2021-2023
✔ means we have experimental daily data since 2023
Totals for Esher and Walton in 2023
3 Sites polluted by Thames Water
129 sewage dumps
1,560 h duration
That's 2.17 months. 2.5 times a week, on average
Change Over Time
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Waterways in Esher and Walton
Daily Data Since 2023
     Monitoring Online      Monitoring Offline      Polluting      Potentially Polluting      Unknown
Daily data is experimental and data is not guaranteed to be accurate. Please inform us of any issue, we will fix.

Pollution Summary 2023

Here are all the reported sewage overflow totals for Esher and Walton in 2023. 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 2 of the total 5 CSO locations had reporting enabled for less than half the year, of which 2 had zero reporting.

Company Waterway Site Sewage Dumps Duration (Hours) Reporting %
Thames Water River Mole ESHER WASTEWATER TREATMENT WORKS 87 1,071 99.6
Thames Water Mole Cobham Bridge, Adj Cobham Ps 40 479 99.8
Thames Water River Mole SWS, STOKE ROAD, COBHAM, SURREY 2 9 100
Thames Water Mole SURFACE WATER-SEWER 0 0 0

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. This 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.