I refer to the letter from Gary Bebbington (Guardian, April 14).

United Utilities would like to reassure its customers that the current review - which is of the council tax banding system - will not affect how the company charges its customers for water and wastewater services.

Although, as Mr Bebbington states, water and wastewater charges for non-metered household customers are calculated using the rateable value of a property, this is an entirely separate system from council tax banding.

United Utilities cannot, by law, use council tax bands as a method of calculating our charges. Ofwat, the water industry regulator, reviews and approves our charging mechanisms, including any price rises. This is an open and accountable process.

A leaflet showing how a customer's water and wastewater charges are calculated always accompanies our bill but if customers have any further questions on the subject they can call us on 0845 746 2222.

Nick Taylor

United Utilities