http://www.legislation.gov.uk/id/ukpga/1973/37

http://www.legislation.gov.uk/ukpga/1973/37/section/18

Water Act 1973

An Act to make provision for a national policy for water, for the conferring and discharge of functions as to water (including sewerage and sewage disposal, fisheries and land drainage) and as to recreation and amenity in connection with water, for the making of charges by water authorities and other statutory water undertakers, and for connected purposes.