To demonstrate what I mean the following is a selection of Water Companies in the UK. As you will see private investment is hardly an option.
My advice: don't even bother with shares in utilities. As everyone knows if you buy the utilities when playing Monopoly you will surely lose the game.(Source "Do Not Pass Go" by Tim Moore)
Thames Water belongs to Macquarie which is a diversified international provider of specialist investment banking and financial services.
Severn Trent ~ 83% of their shares are in the hands of corporate investors
Yorkshire Water owned by Kelda Group plc. Kelda’s main UK subsidiary is Yorkshire Water. Kelda also owns the US water supply business Aquarion and a number of successful non regulated businesses
Anglia Water is owned by AWG which in turn is owned by a private consortium, Osprey, comprising of Canada Pension Plan Investment Board, Colonial First State Global Asset Management, Industry Funds Management and 3i Group plc. The company was delisted from the stock exchange on 21 December 2006.
Three Valleys Water is owned by a French Company Veolia Water which operates three water supply companies in the South East of England -Three Valleys Water, Folkestone & Dover Water Services, and Tendring Hundred Water Services. Together, these companies provide 900 million litres of water a day to a population of 3.3 million.
The Chairman of Veolia Water UK PLC is one John Selwyn Gummer ~ best known for forcing his young daughter to eat beef burgers for the benefit of the press during the BSE scandal.Veolia Water UK also operates in the non-regulated sector of the market under Veolia Water Industrial Outsourcing (VWIO) and Veolia Water Operations Ireland.
Bristol Water plc is a subsidiary of Bristol Water Group Ltd, which is itself a wholly-owned subsidiary of Sociedad General de Aguas de Barcelona S.A. (Agbar).
South East Water is owned by Hastings Diversified Utilities Fund (HDF) and the unlisted Utilities Trust of Australia (UTA). HDF invests in utility infrastructure assets and has over 6,000 investors. UTA is an open-ended trust owned, in the main, by a number of Australian superannuation funds. Both HDF and UTA are managed by Hastings Fund Management Limited.
Welsh Water is owned by Glas Cymru ~ a single purpose company with no shareholders and is run solely for the benefit of customers.
Source for Company Information: The relevant individual company web-sites