Severn Trent has received more complaints than any other water company in recent months, new figures released today reveal.
The company received 1,164 complaints in the six months up to March 31 - a 54 per cent rise on the same six months the previous year.
Billing issues are the biggest source of annoyance for customers, making up more than a third of the 6,274 complaints made nationally to the Consumer Council for Water.
The only other water company to receive an increase in complaints was United Utilities, which saw a 41 per cent increase on last year.
CCWater received 1,138 complaints about the company, which provides water, electricity and gas to customers in the North-west.
Discounting these two firms, customers made 4.5 per cent fewer complaints about all the other water and sewerage companies. However, the overall figures show that complaints are up ten per cent on last year.
A spokesman from Severn Trent said: "We are disappointed with these figures. It has been a caused by a new billing system.
"But we are doing all we can to make it work better so that we can bring complaints down this year.
Last month, Severn Trent announced increased profits days after a report revealed it lost more than 100 million gallons every day in leaks - a quarter of all the water it distributes.