Written question asked by Gideon Amos (Liberal Democrat) on Monday, 13 July 2026, in the House of Commons. It was due for an answer on Wednesday, 15 July 2026. It was answered by Matthew Pennycook (Labour) on Wednesday, 22 July 2026 on behalf of the Ministry of Housing, Communities and Local Government.

Housing: Water Supply

Question: To ask the Secretary of State for Housing, Communities and Local Government, what assessment has the Government made of the potential impact of additional housing growth on chalk stream catchments in instances where wastewater treatment works are functioning at or near full capacity.

Answer

My Department has made no such specific assessment.

Between 16 December 2025 and 10 March 2026, we consulted on a new National Planning Policy Framework (NPPF). That draft Framework, which can be found on gov.uk here, includes a new reference to chalk streams as features of high environmental value and an updated definition of irreplaceable habitat, setting out more clearly the criteria which decision-makers should consider when determining whether a habitat falls under the definition.

It also requires early engagement between relevant plan-making authorities and utility providers so that development plans are informed by a clear understanding of capacity and future requirements for water infrastructure, and includes a new decision-making policy to support the delivery of water supply, drainage, and wastewater infrastructure, giving substantial weight to the benefits of improving capacity for existing users, supporting growth, improving water quality and reducing waterborne pollution.

We are currently analysing the feedback received and will publish our response in due course.

Secondary information

Type: Written question
Reference: 18361
Session: 2026-27
Subjects: Housing Inland waterways Sewage Water supply Water treatment
Link: View this Written question on www.parliament.uk

Housing: Water Supply

Secondary information

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