The rise, an increase of around £10 a month, was confirmed by industry body Water UK.
That includes Southern Water customers, who will see a 47% increase taking their average bill to £703.
Bournemouth Water customers will also see a 32% increase to their bills.
It added: “Remember, your bill change could be higher or lower based on the rateable value of your property.”
South West Water, owned by Pennon, will also increase bills by 23 per cent to its 1.8 million customers across Devon, Cornwall and part of Dorset and Somerset.
The United Utilities Bowness outfall pipe releases surface water into Lake Windermere in May 2024 (Photo: Christopher Furlong/Getty Images)The increases are higher than those announced by Ofwat in its new five-year price limits for firms just before Christmas as they include inflation.
Consumer Council for Water chief executive Mike Keil said the rises “are the largest we’ve seen since privatisation and will heap considerable pressure on millions of customers who are already having to make difficult choices.”
James Wallace, the chief executive of campaign group River Action, said the public was paying the price for “decades of neglect” by water companies.
Charles Watson, from River Action, added: “The shareholders in these companies are just laughing all the way to the bank.”
The investment would help to build nine new reservoirs and nine new water transfer schemes, upgrade the capacity of 1,700 wastewater treatment works to reduce pollution and improve and protect more than 15,000 kilometres of rivers across England and Wales.
Water UK advised customers should contact their water company directly to see what help was available if they were concerned.
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