DWI

What DWI does

Contact DWI

Types of regulation

Official guidance from DWI

Curated guidance documents to help you understand your obligations.

• (FAQ5) How can I check whether a product is approved for use with drinking water supplies? - Drinking Water Inspectorate
  Detailed Guidance England and Wales
• Notice of regulation: Northumbrian Water Limited – AMP 7 Discolouration, Multiple Zones - Drinking Water Inspectorate
  Detailed Guidance England and Wales
• Private Supply Legislation - Drinking Water Inspectorate
  Detailed Guidance England and Wales
• RADIOACTIVITY MONITORING OF WATER SUPPLIES  - Drinking Water Inspectorate
  Detailed Guidance England and Wales
• Treatment Guide - Drinking Water Inspectorate
  Detailed Guidance England and Wales
• What is Reg31? - Drinking Water Inspectorate
  Detailed Guidance England and Wales
• A complaint about a local authority not discharging its duty under the regulations - Drinking Water Inspectorate
  Detailed Guidance England and Wales
• Action in the event of a failure at a single domestic dwelling - Drinking Water Inspectorate
  Detailed Guidance England and Wales

View all 896 guidance documents →

Legal framework

Legislation that DWI directly enforces.

Primary legislation

• Water Industry Act 1991 Act 1991
• Water Act 2003 Act 2003
• Water Act 2014 Act 2014

Secondary legislation

• Water Supply (Water Fittings) Regulations 1999 UK Statutory Instrument 1999
• The Water Supply (Water Quality) Regulations 2000 UK Statutory Instrument 2000
• Water Supply (Water Quality) Regulations 2016 UK Statutory Instrument 2016
• Water Supply (Water Quality) Regulations 2016 (Amendment) Regulations 2018 UK Statutory Instrument 2018
• Water Supply (Water Quality) Regulations 2018 (Wales) UK Statutory Instrument 2018

Related legislation

Legislation connected to DWI's remit but not directly enforced — establishing Acts, amendments, referenced legislation, and context.