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

To ask the Secretary of State for Environment, Food and Rural Affairs, whether her department has plans to mandate real time, publicly available MCERTS certified data for all storm overflow and treatment flows by Thames Water.

The Environment Act 2021 requires all water companies, including Thames Water, to publish near real time Event Duration Monitoring (EDM) data for all storm overflows. EDM installation follows specifications set out in the CIWEM (Chartered Institution of Water and Environmental Management) Event Duration Monitoring Good Practice Guide to ensure robust data quality.