The London Plan download section
Water
4A.18 Water and sewerage infrastructure
The Mayor expects developers and local planning authorities to work together with water supply and sewerage companies to enable the inspection, repair or replacement of water supply and sewerage infrastructure. Water and wastewater infrastructure requirements should be put in place in tandem with planned growth to avoid adverse environmental impacts.
In particular the Mayor will and the boroughs should support the implementation of the Thames Tideway Sewer Tunnel project and associated infrastructure and sewage treatment from Hammersmith to Beckton and Lower Lee Valley to Beckton.
The Mayor will work with Thames Water, the Environment Agency and other relevant organisations to ensure that London’s drainage and sewerage infrastructure is sustainable and meets the requirements placed upon it by population growth and climate change.
Additional capacity for the management of sewage sludge will be needed over the plan period to meet the requirements of growth and tighter environmental standards. The Mayor will work in partnership with the boroughs to ensure timely provision of appropriate new facilities at existing Sewage Treatment Works within London.