Cities of London and Westminster polluted by sewage 177 times in 2022 - lasting 438 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 Cities of London and Westminster in 2022
14 Sites polluted by Thames Water
177 sewage dumps
438 h duration
That's 18.25 days. 3.4 times a week, on average
Waterways in Cities of London and Westminster
Live River Pollution Information (Updated 54 minutes 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 Cities of London and Westminster in 2022. Sometimes sewage can be being dumped for months at a time.

Company Waterway Site Sewage Dumps Duration (Hours) Reporting %
Thames Water River Thames HORSEFERRY ROAD SEWER, LONDON 11 85 92.2
Thames Water Tidal Thames PAULS PIER COMBINED SEWER OVERFLOW 62 81 100
Thames Water River Thames WESTERN PS LOW LEVEL SEWER, LONDON 12 62 100
Thames Water River Thames FLEET MAIN LINE SEWER, LONDON 14 48 92.13
Thames Water Tidal Thames Temple Place, Essex Street 7 26 100
Thames Water River Thames NORFOLK STREET, LONDON 6 22 97.1
Thames Water River Thames REGENT STREET, LONDON 8 20 99.8
Thames Water Tidal Thames LONDON BRIDGE CSO 8 19 71.1
Thames Water River Thames SAVOY STREET, LONDON 11 17 96.6
Thames Water River Thames LOWER THAMES STREET, BEER LANE, LON 18 14 99.9
Thames Water Tidal Thames Low Level 1 N, Grosvenor Ditch, Mil 4 13 73.9
Thames Water River Thames NORTHUMBERLAND STREET, LONDON 7 12 98.3
Thames Water River Thames WOOD STREET, LONDON 7 9 99.3
Thames Water River Thames GOSWELL STREET, S. BRANCH SEWER, LO 2 3 92.7
Thames Water River Thames GROSVENOR DITCH, LONDON 0 0 0
Thames Water River Thames KINGS SCHOLARS POND SEWER, LONDON 0 0 0

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.

This project is not associated, approved or endorsed by any of the companies whose logos you see here.