Top of the Poops | Constituency Sewage Map - 2025 Data| Cities of London and Westminster

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View Annual Sewage Data

You're looking at the totals that we have calculated for sewage in Cities of London and Westminster for 2025. It is an estimate, based on very poor quality live data from the Water Companies. This may not align with the 'official' reported sewage values from the water companies, which is reported in April following then end of the year - so 2025 numbers are reported in April 2026.

What's a potential overflow? If the CSO goes 'Offline' while its Overflowing, we don't know if it stopped overflowing until we get a 'Stop' event.

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Constituencies near Cities of London and Westminster

Company	Site Name	Receiving Waterway	Overflow Days	Total Duration (hours)	Offline/Potential Pollution
Thames Water	Savoy street	River Thames	22	155 h 38m	3,951 h
Thames Water	Pauls pier	Tidal Thames	17	58 h 34m	1,177 h
Thames Water	Western (Pimlico) SPS	River Thames	8	31 h 45m	6 h
Thames Water	Low level XX, grosvenor ditch, millb	Tidal Thames	12	24 h 28m	1,722 h
Thames Water	Beer lane	River Thames	20	7 h 52m	-
Thames Water	Low level XX, grosvenor ditch, millb	Tidal Thames	3	6 h 20m	-
Thames Water	Wood street	River Thames	4	4 h 34m	1,862 h
Thames Water	Kings scholars pond	River Thames	5	4 h 20m	-
Thames Water	Horseferry road	River Thames	4	3 h 36m	-
Thames Water	London bridge	Tidal Thames	6	3 h 18m	-
Thames Water	Fleet main line sewer A	River Thames	1	2 h 44m	365 h
Thames Water	Northumberland street	River Thames	1	1 h 28m	-
Thames Water	Temple place essex street	Tidal Thames	1	0 h 40m	2,767 h
Thames Water	Norfolk street	River Thames	1	0 h 16m	2,780 h
Thames Water	Goswell street	River Thames	1	0 h 6m	463 h
Thames Water	Western (Pimlico) SPS	River Thames	0	0 h	-
Thames Water	Pauls pier	Tidal Thames	0	0 h	-
Thames Water	Norfolk street	River Thames	0	0 h	-
Thames Water	Unknown	Unknown	0	0 h	55 h
Thames Water	London bridge	Tidal Thames	0	0 h	-
Thames Water	Beer lane	River Thames	0	0 h	-
Thames Water	Savoy street	River Thames	0	0 h	2,075 h
Thames Water	Wood street	River Thames	0	0 h	-
Thames Water	Goswell street	River Thames	0	0 h	-
Thames Water	Kings scholars pond	River Thames	0	0 h	-
Thames Water	Horseferry road	River Thames	0	0 h	-
Thames Water	Temple place essex street	Tidal Thames	0	0 h	-
Thames Water	Regent street	River Thames	0	0 h	-
Thames Water	Unknown	Unknown	0	0 h	245 h
Thames Water	Fleet main line sewer A	River Thames	0	0 h	55 h
Thames Water	Northumberland street	River Thames	0	0 h	-
Thames Water	Regent street	River Thames	0	0 h	583 h

Company

Site Name

Receiving Waterway

Overflow Days

Total Duration (hours)

Offline/Potential Pollution

Thames Water

Savoy street

River Thames

155 h 38m

3,951 h

Thames Water