Broxbourne

Polluted by sewage 51 times in 2025 lasting 556 hours

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Live data for Broxbourne in 2026

So far this year (as of 25 Oct 2026, 23:15) there has been 929 hours of sewage overflows, from 4 CSO Combined Sewage Overflow - a device that, when operating, pours combined rainwater & sewage into a waterway s

Sewage without rain in Broxbourne

On 2 occasions since December 2024, no rain fell anywhere in Broxbourne for days — and its CSO Combined Sewage Overflow - a device that, when operating, pours combined rainwater & sewage into a waterway s discharged anyway.

30 Sept 2026 1 at once · 0h 20 Mar 2025 1 at once · 0h

Totals for Broxbourne in 2025

2 Sites polluted by Thames Water

51 sewage dumps

556 hours duration

Sewage pollution map of Broxbourne — Sewage pollution map of Broxbourne: 51 spills in 2025, lasting 556 hours, by Thames Water

That's 3.31 weeks. 4.2 times a month, over the year

Change Over Time

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Waterways in Broxbourne

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Pollution Summary 2025

Here are all the reported sewage overflow totals for Broxbourne 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 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	Harmonds Brook West Arm	BRICKENDON WWTW	46	518	100
Thames Water	Toll House Stream	RYE MEADS WWTW	5	38	99.9

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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