Question to the Department for Transport:

To ask the Secretary of State for Transport, what assessment his Department has made of the level of contamination of surface water run-off on the road network overseen by National Highways.

The Department is confident that through the Environment Agency working with National Highways they are able to continually assess, review and improve potential areas of high risk to contamination. National Highways also have rigorous processes in pace to assess and monitor the level of contamination of surface water run off on the road network.