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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.


Track our tunnelling machines
Track the machines

Track our tunnelling machines

See where our tunnelling machines have got to under London.

Open spaces
Open spaces

Open spaces

Tideway is creating new areas of public realm to connect the capital’s residents and visitors with the river more closely than is currently possible.

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.

Click here for our full statement.