PARLIAMENTARY WRITTEN QUESTION
(4 March 2025)

To ask the Secretary of State for Environment, Food and Rural Affairs, what assessment he has made of the potential implications for his policies of environmental contamination caused by sewage discharges by water companies in Epsom and Ewell constituency.

Asked by:
Helen Maguire (Liberal Democrat)

For too long, water companies have discharged unacceptable levels of sewage into our rivers, lakes and seas.

That is why we are placing water companies under special measures through the Water (Special Measures) Act. The Act will drive meaningful improvements in the performance and culture of the water industry as a first important step in enabling wider, transformative change across the water sector.

To further support understanding of the impact that sewage discharges have on the receiving watercourse, a programme to rollout Continuous Water Quality Monitors is beginning in Price Review period (PR24), which runs from 2025-2030. Monitors will be installed near 25% of storm overflows and sewage treatment works in scope for the programme in this period. Sites prioritised for monitoring will be based on Defra’s priority areas.

During PR24, Thames Water will invest £784 million to reduce the use of storm overflows, including in the Epsom and Ewell constituency. Additional improvement actions also include increasing treatment capacity at sewage works, providing storage for high flows, reducing flows entering the system and provision of treatment for storm overflows which are separate from the main treatment route.

There are no sewage treatment works in the Epsom and Ewell constituency.

Answered by:
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