Last reviewed: 28.5.2011 - 6.20pm
In summer 2010, we started a £675m project to modernise and extend London's five major sewage treatment works to increase the amount of sewage the sites can treat, greatly reducing the need for storm discharges to the river.
This work will also improve the standard to which we treat sewage at each of the works, further boosting the quality of the River Thames.
Click on the links below to read more about what we're doing at each site.
In pictures
View a selection of images of our London Tideway Improvements projects and see how the sewers looked over 100 years ago.
Creating a cleaner river
Watch our short film to learn what we're doing to prevent sewage entering the River Thames.
