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River Chelmer polluted by sewage 103 times in 2025 - lasting 476 hours

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Contains OS Data © Crown copyright & database right 2021-2024
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Totals for River Chelmer in 2025
6 Sites polluted by Anglian Water
103 sewage dumps
476 h duration
That's 2.83 weeks. 2 times a week, on average
Constituencies along River Chelmer
Places along River Chelmer

Pollution Summary 2025

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

Company Waterway Site Sewage Dumps Duration (Hours) Reporting %
Anglian Water River Chelmer GREAT EASTON(ESSEX) STW 35 211 100
Anglian Water River Chelmer GREAT DUNMOW STW 13 83 100
Anglian Water River Chelmer LITTLE BADDOW PS 17 73 99.1
Anglian Water River Chelmer GT EASTON - BRIDGEFOOT TPS 6 62 100
Anglian Water River Chelmer THAXTED - PARK STREET CSO 29 43 99.9
Anglian Water River Chelmer GREAT DUNMOW STW 3 1 100
Anglian Water River Chelmer GREAT WALTHAM - HOWE STREET PS 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.