ThisisMoney: Water bills reach 17-year high AVERAGE household water bills are set to hit their highest levels in 17 years, a price comparison service warned today. Customers in England and Wales will see above-inflation increases of around 5.5% after price hikes come into force on April 1, according to uSwitch. It will take the average household bill to £294 per year - the highest level since 1989. The price rises come as water companies lose around 3.6bn litres of water a day due to leakages, uSwitch said.