The Metropolitan Milk Board was established on 16 February 1933 under the Metropolitan Milk Act of 1933. The Board was empowered to regulate and organise the production, purchase, treatment, sale and distribution of whole milk in the metropolitan area. The Metropolitan Milk Board and the Act under which it operated were abolished with the passing of the Milk Act in 1946.

The Milk Board of Western Australia was established on 20 January 1947 under the Milk Act of 1946, replacing the Metropolitan Milk Board and the Metropolitan Whole Milk Act. The Board was responsible for the production, purchase, treatment, sale and distribution of milk throughout the State. The Board, and the Act under which it operated, were abolished with the passing of the Dairy Industry Act of 1973.

The Dairy Industry Authority of Western Australia was established on 11 March 1974 following the passing of the Dairy Industry Authority Act in 1973. This Act repealed previous Acts relating to the marketing of milk. The Dairy Industry Authority is responsible for organising the purchase, production, supply, manufacture, treatment, storage, transport, packaging, sale and distribution of milk and milk products.