North East Hertfordshire was polluted by sewage 537 times in 2024
lasting 7,560 hours

Constituency

Select the constituency from the drop-down

✔ means we have experimental daily data since 2023

Live data for North East Hertfordshire in 2025

So far this year (as of Apr 16, 2025, 6:30 PM) there has been 1,519 hours of sewage overflows

Totals for North East Hertfordshire in 2024

11 Sites polluted by Anglian Water, Thames Water

537 sewage dumps
7,560 h duration

That's 10.5 months. On average 1.5 times a day

Change Over Time

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Constituencies near North East Hertfordshire

Waterways in North East Hertfordshire

Daily Data

We get information about overflowing CSOs since January 2025. Here is a chart of the last three months of data for North East Hertfordshire, 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.

Monitoring Online Monitoring Offline Polluting Potentially Polluting Unknown

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

Pollution Summary 2024

Here are all the reported sewage overflow totals for North East Hertfordshire 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 0 of the total 13 CSO locations had reporting enabled for less than half the year, of which 0 had zero reporting.

Company	Waterway	Site	Sewage Dumps	Duration (Hours)	Reporting %
Thames Water	Cottered Brook	COTTERED WASTEWATER TREATMENT WORKS	190	3,648	99.7
Thames Water	River Quin	BARKWAY WASTEWATER TREATMENT WORKS	70	1,296	100
Thames Water	River Beane	WESTON (HERTS) WWTW	86	1,201	100
Thames Water	River Rib	THERFIELD WTW	34	443	99.8
Anglian Water	River Rhee	ASHWELL WATER RECYCLING CENTRE	45	421	94
Thames Water	River Rib	BUNTINGFORD WWTW	31	237	100
Thames Water	River Rib	STANDON STW, STANDON, HERTS	17	100	99.8
Anglian Water	Fowlmere Stream	BARLEY STW	30	86	100
Thames Water	Rib	Chapmore End	17	66	100
Anglian Water	Pix Brook	LETCHWORTH-NORTON COMMON CSO	15	45	100
Anglian Water	Cat Of River Ivel	SANDON STW	2	13	99.4
Anglian Water	Pix Brook, River Gt Ouse	LETCHWORTH WATER RECYCLING CENTRE	0	0	100
Anglian Water	Onto Land	BALDOCK PS	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. This 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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