Top of the Poops | Constituency Sewage Map | Colchester

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Live data for Colchester in 2026

So far this year (as of 13 Mar 2026, 16:45) there has been 264 hours of sewage overflows, from 34 CSO Combined Sewage Overflow - a device that, when operating, pours combined rainwater & sewage into a waterway s

Totals for Colchester in 2024

9 Sites polluted by Anglian Water

292 sewage dumps

572 hours duration

That's 23.83 days. 5.6 times a week, on average

Change Over Time

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Constituencies near Colchester

Waterways in Colchester

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Pollution Summary 2024

Here are all the reported sewage overflow totals for Colchester in 2024. 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 %
Anglian Water	Holland Brook	COLCHESTER ST ALBANS ROAD CSO	55	345	97.8
Anglian Water	Unknown	SPORTS CENTRE MILL RD.	122	156	98.83
Anglian Water	Tendring Streams	SPORTS CENTRE MILL RD.	65	49	98.18
Anglian Water	Tidal River Colne	COLCHESTER HUNTING GATE CSO	9	5	100
Anglian Water	River Colne	COLCHESTER-EAST BAY MAIN INT CSO	8	4	100
Anglian Water	River Colne	HYTHE BRIDGE	17	4	100
Anglian Water	Tendring Stream	SPORTS CENTRE MILL RD.	8	3	99.65
Anglian Water	River Colne	COLCHESTER-EAST BR (EAST) CSO OV	5	2	100
Anglian Water	River Colne	COLCHESTER-SPRING LANE CSO	3	1	100
Anglian Water	Salary Brook	COLCHESTER - SHEARWATER MEWS CSO	0	0	100

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.

Analysing sewage pollution by the Water Industry

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© 2020-2025 Top-Of-The-Poops CC-BY-SA 4.0,
© 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

Some data reproduced under Open Government Licence

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