Banbury sewage treatment works getting £14.7 million pound upgrade

Thames Water say it will increase capacity by 84%

Sean Woodcock MP taking samples of final effluent at Banbury STW
Author: Grace McGachyPublished 15th Apr 2025

Banbury sewage treatment works are going to be getting a £14.7 million upgrade.

Thames Water say the the work is expected to be completed by 2029 and will increase capacity by 84% which will 'greatly reduce the risk of storm overflows during spells of heavy rain, which can cause the sewer system to be overwhelmed.

Mark Ruinet, Senior Project Manager at Thames Water said: “As custodians of important infrastructure, we need to ensure our sites are resilient to the pressures of climate change and population growth so we can continue to provide reliable services to our customers. Our upgrades at Banbury sewage treatment works, come as part of our commitment to help protect customers and the health of the rivers and waterways.

“We believe all discharges are unacceptable and we are committed to seeing healthy and thriving waterways, however we can’t do it alone. While we play an important role in this, we aren’t the sole custodians of river health. We need everyone working together to help our waterways thrive.”

Sean Woodcock, MP for Banbury, and the Cropredy’s Women's Institute learned of Thames Water’s commitment to updating its infrastructure following a recent visit to the site. The UK’s largest water company invited the Women's Institute and the MP to the site, to showcase the improvements they are making and demonstrate the process of treating wastewater every day.

Sean Woodcock MP for Banbury said: “I am grateful to the Cropredy Women’s Institute for their invitation to tour the Banbury Sewage Treatment works with them. On the tour, I was pleased to hear from Thames Water about the steps they are taking to address pollution in the River Cherwell and local waterways. I hope that these steps will help to clean up the River Cherwell and local rivers for good.”

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