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Eutrophication: Inland Waterways

Asked by Helen MaguireLiberal DemocratDepartment for Environment, Food and Rural AffairsTabled Answered 6 May 2025UIN 48334

The question

To ask the Secretary of State for Environment, Food and Rural Affairs, what steps his Department is taking to prevent eutrophication in waterways.

Answered by Emma Hardy

Eutrophication from excess nutrient pollution is a key pressure affecting our rivers, lakes, and seas.

As part of Price Review 24 final determinations, Ofwat has allowed £4.795 billion of investment to improve water quality by reducing phosphorus pollution in England and Wales. We will also require water companies to upgrade 440 wastewater treatment works by 2030, to meet strict phosphorus targets, reducing harmful nutrient pollution from treated wastewater.

We have committed to a rapid review of the Environmental Improvement Plan which will set out how Defra will deliver our legally binding targets.

The levels of nitrogen losses from agriculture are unacceptable. That is why we are focused on working with farmers across the country to reduce pollution and clean up our waters. Regulations are in place to address nitrogen and wider pollution from agriculture and the Environment Agency conducts over 4,000 inspections nationally each year to support farmers to comply.

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