Water Industry Act 1991

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The Water Industry Act 1991 (c. 56) is an Act of the United Kingdom Parliament consolidating previous enactments relating to the water supply and the provision of wastewater services in England and Wales. It further implemented recommendations of the Law Commission.


The Act is divided into eight parts and a further 15 Schedules are attached


  • Part 1 deals with the appointment and duties of the Director General of Water Services.
  • Part 2 deals with appointment and regulation of Undertakers, the private sector water companies responsible for maintaining the water supply system in the United Kingdom.
  • Part 3 deals with the duties of the water companies with respect to water supply in England and Wales,
  • Part 4 deals with the duties of the water companies with respect to sewerage.
  • Part 5 deals with the financial provisions for operating the system
  • Part 6 gives the water companies certain powers in order to discharge their duties.
  • Part 7 deals with the provision of information to interested parties
  • Part 8 deals with miscellaneous details such as limiting the right to prosecute water companies in respect of sewerage offences.


Notable schedule within the act include 4 Customer Service Committees; 5 Pressure and Constancy of Supply; 6 Rights of Entry; 9 & 12 Compensation Provisions.

Part 2 Water Undertakers[edit]

As of 1 April 2005 the full list of undertakers was [1]

Part 3 Water Supply[edit]

Part 3 Imposes a duty to maintain an efficient and economical water supply system and proscribes minimum standards of performance in connection with water supply.

Standards of wholesomeness[edit]

Clause 67 of the act allows the Secretary of State to proscribe Standards of wholesomeness for water; prescribing the purposes for which the water is to be suitable; substances that are to be present or absent and the concentrations.


  • Water Industry Act 1991 (c. 56); HMSO

External links[edit]