Regulator Profile

DWI

Drinking Water Inspectorate

Enforcement Regulator

2

Areas of regulation

12

Laws enforced

England & Wales

Quick links

Visit official website Email DWI Call 0330 041 6501

Drinking Water Water Quality

What DWI does

Regulates drinking water quality in England and Wales. Audits water companies, investigates water quality incidents, and approves products and substances used in public water supplies. Part of Defra.

Legal framework

Legislation that DWI enforces.

Primary legislation

• Environment Act 2021 (enhancement) Act 2021
• Water Industry Act 1991 Act 1991
• Food Safety Act 1990 Act 1990
• Water Act 2003 Act 2003
• Water Act 2014 Act 2014

Secondary legislation

• Water Supply (Water Fittings) Regulations 1999 UK Statutory Instrument 1999
• Private Water Supplies (England) Regulations 2016 UK Statutory Instrument 2016
• Private Water Supplies (Wales) Regulations 2017 UK Statutory Instrument 2017
• Water Supply (Water Quality) (Amendment) Regulations 2023 UK Statutory Instrument 2023
• 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