The rise - higher than stated last month - will see the average annual bill rise to £603, but there are significant variations between regions.

Water companies have committed extra money for investment in infrastructure, such as reservoirs, and more help for struggling customers.

However, consumer groups are warning the rise means more households will fall into debt.

Regulator Ofwat outlined forecast bill rises in December, which would cover the next five years.

But the bill rises for the year from April, external, announced by industry body Water UK, are higher than those announced by Ofwat as the calculations now include inflation - so account for rising prices that suppliers face.

The average bill increase equates to around £10 a month, from £40 to £50, but millions of households face even steeper rises.

Southern Water customers told they will see a 47% increase to £703 a year while Hafren Dyfrdwy and South West Water bills are rising by 32%.

Thames Water customers have been warned they will see a 31% hike and Yorkshire Water is raising bills by 29%.

Bournemouth Water customers will also see a 32% increase to their bills.

Other factors, such as whether a customer is metered and how much water they use, means the bill changes will vary considerably for customers depending on their circumstances.

Bill rises for the next five years are being front-loaded, with a big increase this April so that spending on new infrastructure, such as new reservoirs, can get going.