After a decade of construction and a multi-billion dollar investment, London’s Thames Tideway Tunnel (affectionately dubbed the “super sewer”) is finally fully operational as of early 2025.
This massive infrastructure project has already made waves by preventing 5.5 million tons of sewage from spilling into the River Thames, marking a historic step toward reviving the health of one of Britain’s most iconic waterways.
The super sewer intercepts sewage from 34 of London’s most polluting overflow points, places like Putney Embankment (home of the University Boat Race) and Blackfriars Bridge.
Instead of dumping waste into the river during storms, the tunnel captures it. From there, it’s channeled to treatment facilities like the one at Beckton where it’s processed instead of poisoning the Thames.
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