Hertford and Stortford polluted by sewage 96 times in 2022 - lasting 786 hours

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Contains OS Data © Crown copyright & database right 2021-2022
© Top of the Poops 2021-2023
✔ means we have experimental daily data for 2023
Totals for Hertford and Stortford in 2022
6 Sites polluted by Thames Water
96 sewage dumps
786 h duration
That's 1.09 months. 1.8 times a week, on average
Live River Pollution Information (Updated 3 hours ago)
On the map above you can see live river pollution information. Rivers likely to be impacted by sewage pollution are marked in brown. This is based on Thames Water live data API, and modelling by Dr Alex Lipp at Merton College, Oxford. More details on the methodology will be added soon.
Daily Data for 2023
     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 2022

Here are all the reported sewage overflow totals for Hertford and Stortford in 2022. Sometimes sewage can be being dumped for months at a time.

Company Waterway Site Sewage Dumps Duration (Hours) Reporting %
Thames Water Harmonds Brook West Arm BRICKENDON WWTW 54 588 100
Thames Water River Ash Hadham Mill 21 89 96.1
Thames Water River Ash WIDFORD AND WARESIDE WWTW 8 64 100
Thames Water Toll House Stream RYE MEADS WWTW 7 30 99.6
Thames Water Stort Navigation BISHOPS STORTFORD MAIN PUMP STATION 4 12 100
Thames Water High Wych Ditch Bakers Farm, High Wych 2 1 100

Data Sources & Accuracy

EDM (Event Duration Monitoring) data and Consented Discharges to Controlled Waters with Conditions from Environment Agency & Data Map Wales

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.

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