It's a Dirty Business

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Maidenhead

Polluted by sewage 76 times in 2024 lasting 843 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 Maidenhead in 2026

So far this year (as of 13 Mar 2026, 16:45) there has been 738 hours of sewage overflows, from 9 CSO Combined Sewage Overflow - a device that, when operating, pours combined rainwater & sewage into a waterway s

Totals for Maidenhead in 2024

4 Sites polluted by Thames Water
76 sewage dumps
843 hours duration
That's 1.17 months. 1.5 times a week, on average

Change Over Time

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Pollution Summary 2024

Here are all the reported sewage overflow totals for Maidenhead in 2024. 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 Cut BRACKNELL WATER TREATMENT WORKS 53 614 99.8
Thames Water Bull Brook ASCOT WWTW 19 198 100
Thames Water Maidenhead Ditch Maidenhead 2 16 100
Thames Water Heywood Stream White Waltham 2 13 100
Thames Water Cut FOUL SEWER OVERFLOW, COPPICE GREEN, 0 0 100

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.