Brentwood and Ongar - 2025 Sewage

Polluted by sewage 5,472 hours in 2025 , potential overflows 1,004 hours

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

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You're looking at the totals that we have calculated for sewage in Brentwood and Ongar for 2025. It is an estimate, based on very poor quality live data from the Water Companies. This may not align with the 'official' reported sewage values from the water companies, which is reported in April following then end of the year - so 2025 numbers are reported in April 2026.

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 2025

Sewage5,472 hours
Monitoring offline0 hours
Potential pollution1,004 hours
Storm overflows32

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Constituencies near Brentwood and Ongar

Daily Data

Jan - 1,247 hours
Feb - 1,390 hours
Mar - 464 hours
Apr - 165 hours
May - 11 hours
Jun - 41 hours , 39 potential
Jul - 148 hours
Aug - 22 hours
Sept - 46 hours
Oct - 195 hours
Nov - 1,157 hours , 197 potential
Dec - 580 hours , 744 potential
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 78 1,363h 45m -
Anglian Water SHENFIELD AND HUTTON STW River Wid 46 765h 27m 39 h
Thames Water Abbess Roding STW Coopers Brook 63 738h 15m -
Anglian Water INGATESTONE STW River Wid 35 606h 55m -
Thames Water Theydon Bois STW Brookhouse Brook 63 486h -
Thames Water Fiddlers Hamlet STW Brookhouse Brook 42 467h 45m -
Thames Water North Weald STW North Weald Brook 35 353h 45m -
Thames Water Fiddlers Hamlet STW Brookhouse Brook 11 138h 30m -
Thames Water Theydon Bois STW Brookhouse Brook 17 127h 15m -
Thames Water North Weald STW North Weald Brook 13 115h 15m -
Anglian Water SHENFIELD AND HUTTON STW River Wid 5 71h 29m 965 h
Anglian Water SHENFIELD AND HUTTON STW River Wid 8 66h 4m -
Thames Water Weald Bridge Road (North Weald) SPS Cripsey Brook 5 47h 15m -
Thames Water Hull Green (Matching) SPS Colville Hall Brook 3 42h 45m -
Thames Water Abbess Roding STW Coopers Brook 4 24h 15m -
Anglian Water INGATESTONE STW River Wid 5 22h 45m -
Thames Water Weald Bridge Road (North Weald) SPS Cripsey Brook 3 12h -
Anglian Water WARLEY-WARLEY STREET SP Mardyke Thames Estuary 5 9h 32m -
Thames Water Willingale STW River Roding 1 5h -
Anglian Water INGRAVE-PS Haveringsgrove Brook 1 3h 50m -
Anglian Water WARLEY EAST SP Mardyke W Thames Est 1 2h 14m -
Anglian Water DODDINGHURST-STW River Wid 2 1h 30m -
Anglian Water WARLEY EAST SP Mardyke W Thames Est 1 0h 35m -
Anglian Water SHENFIELD SEWER SSO River Wid 0 0h -
Anglian Water DODDINGHURST-STW River Wid 0 0h -
Anglian Water WARLEY-WARLEY STREET SP Mardyke Thames Estuary 0 0h -
Anglian Water BLACKMORE-THE GREEN SP River Wid 0 0h -
Anglian Water DODDINGHURST-STW River Wid 0 0h -
Anglian Water INGRAVE-PS Haveringsgrove Brook 0 0h -
Anglian Water SHENFIELD AND HUTTON STW River Wid 0 0h -
Anglian Water DODDINGHURST-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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