Colchester - 2025 Sewage

Polluted by sewage 945 hours in 2025

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

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View Annual Sewage Data

You're looking at the totals that we have calculated for sewage in Colchester 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.

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Constituencies near Colchester

Daily Data

We get information about overflowing CSOs since January 2025. Here is a chart of the last three months of data for Colchester, here you can see overflows in red, the darker the red, the more the CSO overflowed that day.

Each CSO has a row, the most recent data is on the right hand side.

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Daily data is experimental and data is not guaranteed to be accurate. Please inform us of any issue, we will fix.
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Totals so far

Company Site Name Receiving Waterway Overflow Days Total Duration (hours) Total Duration (days)
Anglian Water COLCHESTER-DILBRIDGE RD OV Tendring Streams 38 520 h 21.67
Anglian Water COLCHESTER-BERECHURCH RD Salary Brook 31 311 h 9m 12.96
Anglian Water COLCHESTER-GREENSTEAD RD OV Salary Brook 45 46 h 33m 1.92
Anglian Water Colchester St Albans Road Combined Sewer Overflow Holland Brook 16 21 h 7m 0.88
Anglian Water LAYER DE LA HAYE STW Roman River 3 14 h 38m 0.58
Anglian Water COLCHESTER-EAST BR (EAST)OV River Colne 23 9 h 24m 0.38
Anglian Water COLCHESTER-ROWHEDGE RD Tendring Streams 5 6 h 15m 0.25
Anglian Water COLCHESTER-DILBRIDGE RD OV Tendring Streams 7 4 h 38m 0.17
Anglian Water COLCHESTER-CRICKET PAV OV Tendring Streams 6 4 h 30m 0.17
Anglian Water COLCHESTER-MONKWICK OV Salary Brook 2 2 h 30m 0.08
Anglian Water COLCHESTER-BALKERNE HILL OV Tendring Stream 4 1 h 44m 0.04
Anglian Water COLCHESTER-MILE END RD OV Tendring Streams 4 1 h 44m 0.04
Anglian Water COLCHESTER-IPSWICH RD OV Tendring Streams 2 0 h 45m 0
Anglian Water Colchester - Hunting Gate Combined Sewer Overflow Tidal River Colne 1 0 h 29m 0
Anglian Water Colchester - Hythe Bridge Combined Sewer Overflow River Colne 1 0 h 15m 0
Anglian Water COLCHESTER-GREENSTEAD RD OV Salary Brook 0 0 h 0
Anglian Water Colchester St Albans Road Combined Sewer Overflow Holland Brook 0 0 h 0
Anglian Water COLCHESTER-SPRING LA OV River Colne 0 0 h 0
Anglian Water COLCHESTER-SHEARWATER MEWS OV Salary Brook 0 0 h 0
Anglian Water COLCHESTER-MILE END RD OV Tendring Streams 0 0 h 0
Anglian Water COLCHESTER-MALDON RD OV Tendring Stream 0 0 h 0
Anglian Water COLCHESTER-ROWHEDGE RD Tendring Streams 0 0 h 0
Anglian Water COLCHESTER-CRICKET PAV OV Tendring Streams 0 0 h 0
Anglian Water COLCHESTER-EAST BAY MAIN INT River Colne 0 0 h 0
Anglian Water COLCHESTER-NORTH GATE OV Tendring Streams 0 0 h 0
Anglian Water COLCHESTER-BERECHURCH RD Salary Brook 0 0 h 0
Anglian Water COLCHESTER-EAST BR (EAST)OV River Colne 0 0 h 0
Anglian Water COLCHESTER-MONKWICK OV Salary Brook 0 0 h 0
Anglian Water LAYER DE LA HAYE STW Roman River 0 0 h 0
Anglian Water Colchester - Hunting Gate Combined Sewer Overflow Tidal River Colne 0 0 h 0
Anglian Water Colchester - Hythe Bridge Combined Sewer Overflow River Colne 0 0 h 0
Anglian Water COLCHESTER-SHEARWATER MEWS OV Salary Brook 0 0 h 0
Anglian Water COLCHESTER-BALKERNE HILL OV Tendring Stream 0 0 h 0
Anglian Water COLCHESTER-IPSWICH RD OV Tendring Streams 0 0 h 0

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.

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ยฉ 2020-2025 Top-Of-The-Poops CC-BY-SA 4.0,
ยฉ Openstreetmap contributors, Contains OS data ยฉ Crown copyright and database right 2021-2025,
Contains Water UK National Storm Overflow Hub Data CC-BY-SA 4.0 and analysis ยฉ 2025 Top-Of-The-Poops

Some data reproduced under Open Government Licence

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