A super sewer has been constructed in London.

The need for new sewage mechanisms arose from the fact that the sewer system built 150 years ago by Sir Joseph Bazalgette had become outdated and was unable to handle the large volume of London's waste, which was regularly discharged into the Thames. Construction began in 2016 at 24 sites across London and was completed in early 2025.

The structure was fully integrated into London's Victorian sewer system. The length of the super sewer was 25 kilometers. The diameter of its main tunnel is 7.2 meters, which is equivalent to three London double-decker buses, while the diameter of the connecting tunnels ranges from two to five meters.

Thanks to the new system, the equivalent of 2,200 Olympic swimming pools of sewage has already been prevented from entering the river.