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River Thames polluted by sewage 1,094 times in 2023 - lasting 6,195 hours

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Contains OS Data © Crown copyright & database right 2021-2023
© Top of the Poops 2021-2023

Pollution Summary 2023

Here are all the reported sewage overflow totals for River Thames in 2023. Sometimes sewage can be being dumped for months at a time.

These numbers are very slightly different from the Rivers page. We're working on it.

Company Waterway Site Sewage Dumps Duration (Hours) Reporting %
Thames Water River Thames CRICKLADE WWTW 114 1,482 100
Thames Water River Thames BRIXTON STORM RELIEF SEWER, LONDON 130 914 96.6
Thames Water River Thames SLOANE STREET, RANELAGH GDNS, LONDO 83 766 89.73
Thames Water River Thames HATCHETTS SPS 31 477 94.2
Thames Water River Thames LONG REACH WWTW 42 407 99.8
Thames Water River Thames SW STORM RELIEF SEWER, LONDON 32 394 90.9
Thames Water River Thames HAMBLEDON SEWAGE TREATMENT WORKS 20 334 100
Thames Water River Thames DEPTFORD STORM RELIEF, LONDON 41 171 98.8
Thames Water River Thames IRONGATE SEWER, LONDON 76 156 99.7
Thames Water River Thames HEATH WALL PS, LONDON 43 135 100
Thames Water River Thames FLEET MAIN LINE SEWER, LONDON 71 117 79.07
Thames Water River Thames HAMMERSMITH PS, LONDON 29 107 91.6
Thames Water River Thames EARL PS STORM OUTLET, LONDON 30 94 100
Thames Water River Thames COUNTERS CREEK, LOTS ROAD PS, LONDO 21 76 100
Thames Water River Thames FALCON BROOK PS, LONDON 34 75 99.7
Thames Water River Thames WESTERN PS LOW LEVEL SEWER, LONDON 22 74 99.7
Thames Water River Thames CHARLTON STORM RELIEF, LONDON 9 41 84.97
Thames Water River Thames NORTHUMBERLAND STREET, LONDON 19 41 95.7
Thames Water River Thames PETERSHAM ROAD CSO 21 35 98.3
Thames Water River Thames HORSEFERRY ROAD SEWER, LONDON 25 35 96.7
Thames Water River Thames GREENWICH PS, GREENWICH, LONDON 5 30 99.9
Thames Water River Thames CLAPHAM STORM RELIEF SEWER, LONDON 22 28 100
Thames Water River Thames REGENT STREET, LONDON 13 28 99.1
Thames Water River Thames KINGS SCHOLARS POND SEWER, LONDON 16 27 84
Thames Water River Thames LOWER THAMES STREET, BEER LANE, LON 36 26 100
Thames Water River Thames TIDEWAY COMBINED SEWER OVERFLOW 4 20 100
Thames Water River Thames SMITH STREET, LONDON 23 19 90
Thames Water River Thames WOOD STREET, LONDON 13 19 99.8
Thames Water River Thames SHAD, THAMES PS, LONDON 10 17 100
Thames Water River Thames NORFOLK STREET, LONDON 10 14 99.5
Thames Water River Thames CSO AT PORTSMOUTH/UXBRIDGE ROAD 5 5 97.8
Thames Water River Thames STAMFORD BROOK, HAMMERSMITH, LONDON 5 4 99.8
Thames Water River Thames CHURCH STREET SEWER, LONDON 7 2 99.8
Thames Water River Thames WANDLE VALLEY, LONDON 1 2 99.9
Thames Water River Thames PUTNEY BRIDGE STREET, LONDON 11 2 94.9
Thames Water River Thames NW. RELIEF SEWER, LOWER MALL, LONDO 2 1 94.2
Thames Water River Thames HOLLOWAY STORM SEWER, LONDON 2 1 95.5
Thames Water River Thames GOSWELL STREET, S. BRANCH SEWER, LO 5 1 73.4
Thames Water River Thames LOW LEVEL 1, LOWER MALL, LONDON 5 1 100
Thames Water River Thames QUEEN STREET, LONDON 2 0 96.5
Thames Water River Thames ISLE OF DOGS PUMPING STATION CSO 4 0 100
Thames Water River Thames LITTLE MARLOW STW ( WOOBURNVALLEY ) 0 0 99.8
Thames Water River Thames SAVOY STREET, LONDON 0 0 0
Thames Water River Thames Mackney Lane (Main) 0 0 0
Thames Water River Thames GORING WASTEWATER TREATMENT WORKS 0 0 98.9
Thames Water River Thames Long Lane 0 0 0
Thames Water River Thames WAPPING DOCK, GUN WHARF, LONDON 0 0 100
Thames Water River Thames WEST PUTNEY RELIEF 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, 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.