Harlow

Polluted by sewage 125 times in 2025 lasting 1,399 hours

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Live data for Harlow in 2026

So far this year (as of 25 Oct 2026, 21:15) there has been 1,351 hours of sewage overflows, from 12 CSO Combined Sewage Overflow - a device that, when operating, pours combined rainwater & sewage into a waterway s

Sewage without rain in Harlow

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

10 Jan - 11 Jan 2025 2 at once · 52h 10 May 2026 1 at once · 0h

Totals for Harlow in 2025

6 Sites polluted by Thames Water
125 sewage dumps
1,399 hours duration
Sewage pollution map of Harlow
Sewage pollution map of Harlow: 125 spills in 2025, lasting 1,399 hours, by Thames Water
That's 1.94 months. 2.4 times a week, on average

Change Over Time

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Pollution Summary 2025

Here are all the reported sewage overflow totals for Harlow 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 Hatfield Heath Watercourse HATFIELD HEATH WWTW 29 564 99.9
Thames Water Pincey Brook Takeley 40 425 93.8
Thames Water Little Hallingbury Brook LITTLE HALLINGBURY WWTW 26 209 100
Thames Water White Roding WHITE RODING WWTW 19 129 99.9
Thames Water Shonks Brook Winters Brook, Hastingwood 9 68 100
Thames Water Pinsey Brook Hatfield Broad Oak Cage End 2 3 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.

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Analysing sewage pollution by the Water Industry

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