London’s ‘super sewer’ cuts sewage entering River Thames by 86%

London’s new “super sewer” has led to a “dramatic reduction” in sewage entering the River Thames, with raw sewage discharges falling by 86% since the tunnel opened, according to a report from Thames Water.

The 16-mile sewer, which Thames Water recently took on the running of, has also prevented around 84 tonnes of litter, including wet wipes and sanitary products, from reaching the river, the company reported.

The findings mark what has been described as a “new chapter” for the Thames, a waterway that was once declared biologically dead.

However, Thames Water warned that pollution and extreme weather continue to pose “big challenges” for London, adding that further action is needed to prepare the capital for the effects of climate change.

Tess Fayers of Thames Water said the report’s findings were “an important milestone for the river and a significant step towards a cleaner, healthier and more resilient Thames.”

The report comes as Thames Water, which faces re-nationalisation amid concerns over its poor performance, continues to address environmental challenges affecting the capital’s waterways.