What is Reg 31?
Water undertakers and their supply chain have a responsibility to comply with UK Water Supply (Water Quality) Regulations. All materials, products and processes that come into contact with drinking water must be approved by the Drinking Water Inspectorate (DWI) to ensure they do not reduce the protection of human health.
Reg 31 focusses on water company-owned assets up to the water boundary; materials, products, and chemicals used in construction and operation of water treatment and distribution must cause no detriment to water quality. In addition, the storage and use of all chemicals and materials that may come into contact with drinking water must comply with Reg 31, associated British Standards, and conditions for use. Non-compliance with any aspect of Reg 31 is a criminal offence and could result in prosecution or warning letters from DWI.