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What is Regulation 31?

Regulation 31 of The Water Supply (Water Quality) Regulations 2016 (as amended)1 implements Article 10 of the Council of the European Union Drinking Water Directive (DWD) in England and Wales for all chemicals and construction products used by water undertakers, from the source of the water, up to the point of delivery to the consumer’s building. It sets out how approvals can be given to such construction products and materials that do not prejudice water quality and consumer safety.

Does your product require approval?

Learn more about Reg 31 and find out if your product requires approval

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What is Reg 31?

Reg 31 approval

Resources for Water Companies

Laboratory information

FAQs and Letters

Glass filling with water from a tap

Approved Products

  1. Advice Sheets

    For all advice on the approval process and application requirements

Reg31 Enquiries

To contact the Regulation 31 team, please email reg31.enquiries@defra.gov.uk, or telephone +44(0)330 041 6501

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