Top of the Poops | Constituency Sewage Map - 2025 Data| Portsmouth South

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You're looking at the totals that we have calculated for sewage in Portsmouth South 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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Company	Site Name	Receiving Waterway	Overflow Days	Total Duration (hours)	Offline/Potential Pollution
Southern Water	HENDERSON ROAD EASTNEY CSO - 111912	Solent	51	302 h 55m	-
Southern Water	HENDERSON ROAD EASTNEY CSO - 111912	Solent	18	137 h 37m	-
Southern Water	PIER ROAD SOUTHSEA CSO - 108469	Portsmouth Harbour	24	109 h 46m	-
Southern Water	FORT CUMBERLAND ROAD EASTNEY SSO - 110658	Langstone Harbour	2	13 h 45m	-
Southern Water	PIER ROAD SOUTHSEA CSO - 108469	Portsmouth Harbour	13	1 h 35m	-
Southern Water	FORT CUMBERLAND ROAD EASTNEY SSO - 110658	Langstone Harbour	0	0 h	-

It's a Dirty Business

Portsmouth South - 2025 Sewage

Polluted by sewage 565 hours in 2025

Portsmouth South - 2025 Sewage

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It's a Dirty Business

Portsmouth South - 2025 Sewage Polluted by sewage 565 hours in 2025

Portsmouth South - 2025 Sewage

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Portsmouth South - 2025 Sewage

Polluted by sewage 565 hours in 2025