The increase means households in England and Wales will see an average rise of around £31 per year from April.
Consumer groups warned that the increases were “more than what many people can afford”.
“We know at least two in five households will find these increases difficult to afford but the support being offered by some water companies lacks ambition.”
It comes as around 58,000 homes in Hampshire are still without water following a “technical issue” at a supply works.
Thames Water is to be allowed to increase consumer bills by 35 per cent, as the regulator also handed it an £18.2m fine for paying “unjustified” dividends to shareholders.
Of the 16 water companies in England and Wales, only SES Water – which covers around 750,000 people in parts of Surrey, Kent and south London – will see customers’ bills decrease in the next five years.
More than 50,000 homes left without water in Hampshire supply cut
Read MoreBut it actually gave firms higher bill increases than they asked for in their original business plans submitted in early 2024.
Water firms then had a chance to put forward updated requests for bill increases. Anglian increased its request to £649 in annual bills.
Similar processes happened at Northumbrian Water, Severn Trent, South West Water, United Utilities and Yorkshire Water.
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