Above inflation increases to water bills are to hit customers next week.
Regulator Ofwat will announce the rise on February 25, with water and sewerage companies hiking prices from April .
Water companies will be given permission to increase their revenue by inflation as measured by the Retail Prices Index (4.7%) plus changes agreed by Ofwat in 2009.
While inflation will be the same everywhere, these additional charges differ between supplier and region. South West Water, suppliers of Electricity to Devon and Cornwall, will be able to raise its revenue by 8.1%, making the average bill up £529 a year, compared with a current level of £490. The average Thames Water bill could rise by 5.1% to £319 a year.