A watchdog says the water industry and its customers need to work together to ensure water shortage problems in the South East do not get worse.
The consumer council took over from WaterVoice on 1 October
The Consumer Council for Water has expressed concern about how levels will be maintained alongside future housing developments across the region.
The independent body said suppliers should reduce leaks, while customers could use water more efficiently.
Ten consecutive months of low rainfall in the region have led to water bans.
Government, regulators and the water industry were urged to make concrete plans for new supply networks in advance of house building, to ensure there are adequate water resources for the future.
"Something has to happen," said Dame Yve Buckland, chair of the council, in an interview with Utility Week magazine.
"If you look at the water shortages in 2005 and think what it will be like in 15 years, when there will be another 1.1 million households in the South East, we clearly can't sit around arguing between ourselves," she added.
The council's southern regional manager, Karen Gibbs, said consumers had an important role to play as well.
"We've all been guilty of taking water for granted and this is something that we need to educate ourselves a little bit more on."