Portsmouth Water is the utility company responsible for water supply and distribution in the City of Portsmouth, part of East Hampshire and part of West Sussex.

Places served include Gosport, Fareham, Portsmouth, Havant, Chichester, and Bognor Regis.

[5] On 3 June 2021, Havant Borough Council approved Portsmouth Water's plans for a reservoir at Havant Thicket.

[6][7] There are now 18 borehole sites throughout the catchment area from the South Downs groundwater and the natural springs in Havant and Bedhampton.

There are up to 25 springs used at any one time producing up to 170 million litres per day.