Thames Water: Sewage

(asked on 29th August 2025) - View Source

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 capacity of Thames Water to prevent sewage discharges.


Answered by
Emma Hardy Portrait
Emma Hardy
Parliamentary Under-Secretary (Department for Environment, Food and Rural Affairs)
This question was answered on 9th September 2025

This Government has put down the building blocks to clean up England’s rivers, lakes and seas. We are rebuilding the water network to slash pollution levels, backed by a record £104 billion of investment, which includes over £10 billion to reduce sewage discharges from over 2,500 storm overflows in England.

Over 2025-30, Thames Water are expected to deliver a 29% reduction in spills from storm overflows and reduce pollution incidents by 30%. They are also expected to invest £1.2 billion to prevent harmful nutrients polluting rivers.

As part of the Environment Act 2021, a duty has been created for water and sewerage companies in England and Wales, including Thames Water, to produce Drainage and Wastewater Management Plans (DWMPs).

These plans will help sewerage companies to fully assess the capacity of the drainage and wastewater network, develop collaborative solutions to current problems and future issues and bring together key stakeholders including local authorities and industry regulators.

We are introducing root and branch reform so that the water sector works for the British people. Working in partnership with water companies, investors and communities, the Government will introduce a new water reform bill early this Parliament.

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