Last edited 24 Sep 2021

Drinking Water Inspectorate DWI

The Drinking Water Inspectorate (DWI) is part of the Department for Environment, Food and Rural Affairs (Defra). It was formed in 1990 to provide independent assurance that water supplies in England and Wales are safe and that drinking water quality is acceptable to consumers.

DWI is authorised to enforce measures if standards are not being met. It can also take appropriate action when water is deemed unfit for human consumption.

Additional areas of responsibility include:

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