Upgrading Chesham

We know we need to do a lot more to protect our much-loved rivers. Over the next two years, we’re investing more than £16 million in upgrading Chesham sewage treatment works. It's part of a £1.6 billion investment to improve our sewage treatment works and sewer networks.

The different stages

Phase 1: upgrading and increasing the size of the assets, so the site can hold an additional 112 litres of wastewater a second before overflowing to storm tanks. This increased capacity means that we can now treat larger volumes of wastewater to stop it entering our rivers.

Phase 2: an increased focus on enhancing the biodiversity in the 18km River Chess.

Two images of Chesham water treatment works

How the upgrade will help

Enhance river environment and community health
Biodiversity thrive in an area of outstanding natural beauty
People enjoy more recreational activities in our rivers, such as wild swimming and paddle boarding

Watch our Healthy Rivers episode of On Tap to find out more about this project.

You'll also see the many ways we're working in partnership - bringing together all the right people who have an interest in protecting the health of our wonderful rivers.