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Totals for River Thames in 2025

34 Sites polluted by Thames Water

254 sewage dumps
1,413 h duration

That's 1.96 months. 4.9 times a week, on average

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Constituencies along River Thames

Places along River Thames

Pollution Summary 2025

Here are all the reported sewage overflow totals for River Thames in 2025. Sometimes sewage can be being dumped for months at a time.

Company	Waterway	Site	Sewage Dumps	Duration (Hours)	Reporting %
Thames Water	River Thames	CRICKLADE WWTW	59	641	100
Thames Water	River Thames	HATCHETTS SPS	33	378	99.5
Thames Water	River Thames	LONG REACH WWTW	10	84	99.7
Thames Water	River Thames	DEPTFORD STORM RELIEF, LONDON	3	46	99.8
Thames Water	River Thames	BRIXTON STORM RELIEF SEWER, LONDON	5	32	66.6
Thames Water	River Thames	HEATH WALL PS, LONDON	4	29	99.6
Thames Water	River Thames	GREENWICH PS, GREENWICH, LONDON	4	26	99.8
Thames Water	River Thames	WESTERN PS LOW LEVEL SEWER, LONDON	5	23	98.3
Thames Water	River Thames	TIDEWAY COMBINED SEWER OVERFLOW	2	19	100
Thames Water	River Thames	PUTNEY BRIDGE STREET, LONDON	2	15	95.7
Thames Water	River Thames	IRONGATE SEWER, LONDON	28	15	100
Thames Water	River Thames	SAVOY STREET, LONDON	6	12	92.7
Thames Water	River Thames	LITTLE MARLOW STW ( WOOBURNVALLEY )	2	10	98.7
Thames Water	River Thames	COUNTERS CREEK, LOTS ROAD PS, LONDO	1	9	49.3
Thames Water	River Thames	HAMMERSMITH PS, LONDON	2	9	86.4
Thames Water	River Thames	LOWER THAMES STREET, BEER LANE, LON	24	9	100
Thames Water	River Thames	FALCON BROOK PS, LONDON	3	8	99.9
Thames Water	River Thames	SMITH STREET, LONDON	6	4	95.3
Thames Water	River Thames	WOOD STREET, LONDON	4	4	79.5
Thames Water	River Thames	EARL PS STORM OUTLET, LONDON	2	4	100
Thames Water	River Thames	SLOANE STREET, RANELAGH GDNS, LONDO	1	4	100
Thames Water	River Thames	KINGS SCHOLARS POND SEWER, LONDON	4	4	100
Thames Water	River Thames	FLEET MAIN LINE SEWER, LONDON	2	3	99.8
Thames Water	River Thames	HORSEFERRY ROAD SEWER, LONDON	4	3	99.6
Thames Water	River Thames	STAMFORD BROOK, HAMMERSMITH, LONDON	1	3	100
Thames Water	River Thames	SHAD, THAMES PS, LONDON	2	2	100
Thames Water	River Thames	CSO AT PORTSMOUTH/UXBRIDGE ROAD	2	2	100
Thames Water	River Thames	NORTHUMBERLAND STREET, LONDON	1	1	99.5
Thames Water	River Thames	CHURCH STREET SEWER, LONDON	2	1	100
Thames Water	River Thames	NW. RELIEF SEWER, LOWER MALL, LONDO	1	0	99.8
Thames Water	River Thames	LOW LEVEL 1, LOWER MALL, LONDON	1	0	100
Thames Water	River Thames	ISLE OF DOGS PUMPING STATION CSO	24	0	100
Thames Water	River Thames	GOSWELL STREET, S. BRANCH SEWER, LO	2	0	95.2
Thames Water	River Thames	QUEEN STREET, LONDON	2	0	100
Thames Water	River Thames	SW STORM RELIEF SEWER, LONDON	0	0	100
Thames Water	River Thames	NORFOLK STREET, LONDON	0	0	99.6
Thames Water	River Thames	REGENT STREET, LONDON	0	0	97.3
Thames Water	River Thames	CHARLTON STORM RELIEF, LONDON	0	0	100
Thames Water	River Thames	HOLLOWAY STORM SEWER, LONDON	0	0	98.3
Thames Water	River Thames	WAPPING DOCK, GUN WHARF, LONDON	0	0	99.8
Thames Water	River Thames	WANDLE VALLEY, LONDON	0	0	94.4
Thames Water	River Thames	HAMBLEDON SEWAGE TREATMENT WORKS	0	0	95.7

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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