Brentwood and Ongar - Live Sewage

Polluted by sewage 6,442 hours in 2026 , monitoring offline 2,681 hours , potential overflows 1,010 hours so far..

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Contains OS Data © Crown copyright & database right 2021-2024
© Top of the Poops 2021-2024

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✔ means we have live data (𝑥 if not)

View Annual Sewage Data

You're looking at the totals that we have calculated for sewage in Brentwood and Ongar so far for 2026. It is an estimate, based on very poor quality live data from the Water Companies. The water companies report their sewage to the Environment Agency every year in April. You can see the last reported year in the other page

What's a potential overflow? If the CSO goes 'Offline' while its Overflowing, we don't know if it stopped overflowing until we get a 'Stop' event.

Totals for Brentwood and Ongar in 2026

Sewage6,442 hours
Monitoring offline2,681 hours
Potential pollution1,010 hours
Storm overflows32

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Constituencies near Brentwood and Ongar

Daily Data

Jan - 2,348 hours , 178 potential
Feb - 2,855 hours
Mar - 886 hours
Apr - 57 hours , 222 potential
May - 39 hours , 609 potential
Jun - 18 hours
Jul - 0 hours
Aug - 5 hours , 339 offline
Sept - 71 hours , 843 offline
Oct - 149 hours , 1,169 offline
Nov - 11 hours , 328 offline
Daily data is experimental and data is not guaranteed to be accurate. Please inform us of any issue, we will fix.
Please note: We don't have rainfall data for Wales. If you know where to source it please let us know!
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Totals so far

Company Site Name Receiving Waterway Overflow Days Total Duration (hours) Offline/Potential Pollution
Thames Water Willingale STW River Roding 88 1,524h 45m 1,965 h
Thames Water Abbess Roding STW Coopers Brook 73 1,430h 15m 39 h
Thames Water Fiddlers Hamlet STW Brookhouse Brook 42 724h 15m 29 h
Thames Water North Weald STW North Weald Brook 46 662h 23 h
Thames Water Theydon Bois STW Brookhouse Brook 58 612h -
Thames Water Hull Green (Matching) SPS Colville Hall Brook 25 438h 3m -
Anglian Water SHENFIELD AND HUTTON STW River Wid 23 373h 52m 344 h
Anglian Water INGATESTONE STW River Wid 34 348h 58m -
Thames Water Weald Bridge Road (North Weald) SPS Cripsey Brook 17 159h 15m 787 h
Anglian Water SHENFIELD SEWER SSO River Wid 11 77h 29m 502 h
Anglian Water SHENFIELD AND HUTTON STW River Wid 9 45h 50m -
Anglian Water DODDINGHURST-STW River Wid 10 28h 38m -
Anglian Water WARLEY-WARLEY STREET SP Mardyke Thames Estuary 4 10h 41m -
Anglian Water DODDINGHURST-STW River Wid 2 4h 15m -
Anglian Water INGRAVE-PS Haveringsgrove Brook 2 1h 59m -
Thames Water Fiddlers Hamlet STW Brookhouse Brook 0 0h -
Anglian Water INGRAVE-PS Haveringsgrove Brook 0 0h -
Anglian Water DODDINGHURST-STW River Wid 0 0h -
Thames Water Abbess Roding STW Coopers Brook 0 0h -
Anglian Water SHENFIELD AND HUTTON STW River Wid 0 0h -
Anglian Water BLACKMORE-THE GREEN SP River Wid 0 0h -
Anglian Water WARLEY EAST SP Mardyke W Thames Est 0 0h -
Thames Water Willingale STW River Roding 0 0h -
Anglian Water DODDINGHURST-STW River Wid 0 0h -
Thames Water North Weald STW North Weald Brook 0 0h -
Anglian Water SHENFIELD AND HUTTON STW River Wid 0 0h -
Thames Water Weald Bridge Road (North Weald) SPS Cripsey Brook 0 0h -
Thames Water Theydon Bois STW Brookhouse Brook 0 0h -
Anglian Water WARLEY-WARLEY STREET SP Mardyke Thames Estuary 0 0h -
Anglian Water WARLEY EAST SP Mardyke W Thames Est 0 0h -
Anglian Water INGATESTONE STW River Wid 0 0h -
Thames Water Hull Green (Matching) SPS Colville Hall Brook 0 0h -

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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© Openstreetmap contributors, Contains OS data © Crown copyright and database right 2021-2025,
Contains Water UK National Storm Overflow Hub Data CC-BY-SA 4.0 and analysis © 2025 Top-Of-The-Poops

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