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Keynsham

Polluted by sewage 206 times in 2025 lasting 740 hours

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Totals for Keynsham in 2025

8 Sites polluted by Wessex Water
206 sewage dumps
740 hours duration
That's 4.4 weeks. 4 times a week, on average

Change Over Time

Constituency for Keynsham

Nearby Constituencies

Waterways in Keynsham

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Sewage pollution map of Keynsham: 740 hours in 2025
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Pollution Summary 2025

Here are all the reported sewage overflow totals for Keynsham 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 place 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 %
Wessex Water River Avon KEYNSHAM WASTEWATER TREATMENT WORKS 27 255 100
Wessex Water River Avon WILLSBRIDGE COMBINED SEWER OVERFLOW 45 221 100
Wessex Water River Chew KEYNSHAM HIGH LEVEL PS 43 132 100
Wessex Water River Chew KEYNSHAM LOW LEVEL PUMPING STATION 8 66 100
Wessex Water River Avon THE HAMS PUMPING STATION 50 46 100
Wessex Water Charlton Bottom Via Sws CHARLTON ROAD CSO 7 7 100
Wessex Water Charlton Bottom Via Sws BRISTOL ROAD CSO 24 6 99.8
Wessex Water River Avon Via Sws WICKHOUSE FARM CSO 2 3 100
Wessex Water Siston Brook WILLSBRIDGE PUMPING STATION 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

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.

Top of the Poops

Analysing sewage pollution by the Water Industry

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Contains Water UK National Storm Overflow Hub Data CC-BY-SA 4.0 and analysis © 2025 Top-Of-The-Poops

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