Question to the Department for Environment, Food and Rural Affairs:

To ask the Secretary of State for Environment, Food and Rural Affairs, what estimate her Department has made of the number of sewage leaks reported by Thames Water in (a) Streatham constituency, (b) London and (c) England in the last five years.

The Environment Agency regulates discharges from Storm Overflows that discharge to the environment during rainfall, these are not leaks. The Environment Agency collates discharge data from Water and Sewerage Companies for storm overflows and for 2020 and 2021 the data is published here. The 2022 data will be published in March 2023.

The installation of Event Duration Monitors on Storm Overflows has increased markedly from 2016 to 2021. We hold data for Thames Water for the period 2018 to 2021 when a total of 44,368 spills were recorded.