Question to the Department for Transport:

To ask the Secretary of State for Transport, whether her department monitors the discharge of highway runoff entering rivers along the network.

National Highways carries out targeted monitoring at key locations on the strategic road network and is working with the Environment Agency to develop a further monitoring strategy. National Highways also has its 2030 Water Quality Plan setting out what it is doing to tackle potential pollution to the water environment from its highest risk outfalls and soakaways. Water runoff from local roads is a matter for local highway authorities.