Question to the Department for Environment, Food and Rural Affairs:

To ask the Secretary of State for Environment, Food and Rural Affairs, what information her department holds on the proportion of United Utilities' (a) water mains and (b) sewer network that is more than (i) 50, (ii) 75 and (iii) 100 years old; and what assessment she has made of the potential impact of asset age on leakage, sewer failure and pollution incidents.

Water companies are responsible for understanding the operation, costs and delivery of their networks and investment plans. Ofwat monitors company performance against the commitments and targets agreed through the price review process and publishes relevant information through its regulatory processes.