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

To ask the Secretary of State for Environment, Food and Rural Affairs, how many Event Duration Monitors have been installed on storm overflows in each year since 2010; and how many of those monitors have been installed on storm overflows that stopped working in each year since 2010.

In 2021 we had 88% coverage of storm overflows with event duration monitors (EDMs), and we will have complete coverage by the end of this year. In 2021, only 2% of all installed EDMs failed to return data. Event Duration Monitoring has not stopped at any sites. There may be times where an individual monitor may go offline, but every step must be taken by water companies to ensure monitors get back online as soon as possible.