The tunnel

What we do

London relies on a 150-year-old sewer system built for a population less than half its current size. 

As a result, millions of tonnes of raw sewage spills, untreated, into the River Thames each year.

That’s where we come in.

We’re building a 25km ‘super sewer’ under the Thames to intercept those nasty spills and clean up our river for the good of the city, its wildlife and you.

But more than that, the Tideway project will bring thousands of jobs, a rejuvenated river economy and completely new areas of public space.