The Water Industry Act 1991 (c. 56) is an act of the Parliament of the United Kingdom consolidating previous enactments relating to the water supply and the provision of wastewater services in England and Wales. It also implemented recommendations made by the Law Commission.
The enactments consolidated by the act were repealed by section 3 of, and schedule 3 to, the Water Consolidation (Consequential Provisions) Act 1991.
The act is divided into eight parts and a further 15 schedules are attached.
The act includes 15 schedules, which include:
As of 1 April 2005 the full list of undertakers was:
Water only undertakers were:
Part 3 imposes a duty to maintain an efficient and economical water supply system and prescribes minimum standards of performance in connection with water supply.
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.
Part 4 deals with sewers.
Under section 104 a developer can build sewers and agree that the water company will adopt them later.