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

To ask the Secretary of State for Environment, Food and Rural Affairs, what assessment he has made of the potential impact of pollution of chalk streams on (a) water quality, (b) biodiversity and (c) human health (i) nationally, (ii) in the River Test and (iii) in the River Itchen.

Cleaning up our waters, including iconic sites such as chalk streams is a top government priority. That is why on 23 October 2024, the Secretary of State announced the launch of an independent commission to fundamentally transform how our water system works. Fixing the systemic issues in the water system is essential to address the multiple pressures facing chalk streams, namely over abstraction, phosphorous pollution and physical modifications of habitats.

There is significant investment and improvement work taking place within the Test and Itchen catchments. This includes extensive monitoring of environmental indicators on water quality and ecology; regulation of operators within the catchments such as water and agriculture sectors; working with the water industry on reducing reliance on harmful abstractions and ensuring compensation and mitigation while alternative sources are delivered (for example, Havant Thicket reservoir and associated schemes) and tackling diffuse water pollution. Much of this work includes contributions from a wide range of partners including wildlife trusts, rivers trusts, fisheries managers, landowners, water companies and regulators.

The Environment Agency undertakes regular sampling of the biodiversity in the Test and Itchen and publishes the results on the Environment Agency’s Ecology and Fish Data Explorer. This is freely available via the Government’s Open data website: EA Ecology & Fish Data Explorer