London's Super Sewer Play full video

Reconnecting London with the River Thames

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.

Meet the Team
Meet the team

Meet the Team

Find out more about our people

Tunnel Vision
Tunnel Vision

Tunnel Vision

Watch our YouTube documentary series

More by river
Every Boat Counts

More by river

Find out about Tideway’s extensive use of the river to transport construction materials.

with you
Our Community

Volunteering with you

Tideway's commitment on modern slavery

Modern slavery and human trafficking are atrocious forms of organised crime in which people are treated as commodities and exploited for criminal gain. Tideway is committed to improving our practices to combat modern slavery and human trafficking.

Read more about Tideway's commitment on modern slavery


We report these figures because we believe it is important to continue to improve diversity in the construction industry, particularly at senior levels. Whilst we have always had an ambition to address this imbalance, we recognise there is more to do. Turn to page 113 of our Annual Report to read about our gender and ethnicity and pay gap reporting.

Annual Report 2020/21 about GENDER AND ETHNICITY PAY GAP

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