Chippenham (Wiltshire)

Polluted by sewage 166 times in 2025 lasting 865 hours

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Totals for Chippenham (Wiltshire) in 2025

9 Sites polluted by Wessex Water

166 sewage dumps

865 hours duration

That's 1.2 months. 3.2 times a week, on average

Change Over Time

Constituency for Chippenham (Wiltshire)

Nearby Constituencies

Waterways in Chippenham (Wiltshire)

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Sewage pollution map of Chippenham (Wiltshire): 865 hours in 2025

Sewage pollution map of Chippenham (Wiltshire): 865 hours in 2025

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Pollution Summary 2025

Here are all the reported sewage overflow totals for Chippenham (Wiltshire) 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	CHIPPENHAM WATER RECYCLING CENTRE	40	495	99.95
Wessex Water	Hardenhuish Brook	GASTON ROAD CSO	46	191	100
Wessex Water	Unknown	BRISTOL ROAD CSO	53	79	100
Wessex Water	River Avon	WESTMEAD PUMPING STATION	6	66	99.7
Wessex Water	River Avon	MONKTON PARK OFFICES CSO	6	21	100
Wessex Water	River Avon Via Sws	LONG CLOSE CSO	6	5	100
Wessex Water	River Avon	CHARTER ROAD CSO	1	3	94.7
Wessex Water	River Avon	WOOD LANE CSO	7	1	100
Wessex Water	River Avon	MARY STREET COMBINED SEWER OVERFLOW	1	0	100
Wessex Water	Unknown	DALLAS ROAD CSO	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.

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Analysing sewage pollution by the Water Industry

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