Homebush Bay was the former name of a suburb of western Sydney, in the state of New South Wales, Australia that took in the suburbs of Sydney Olympic Park, Wentworth Point and part of the neighbouring suburb of Lidcombe. Homebush Bay is located 16 kilometres west of the Sydney central business district, in the local government area of Auburn Council. Homebush and Homebush West are separate suburbs.
Homebush Bay took its name from the bay with natural and artificial shoreline on the southern side of the Parramatta River between the suburbs of Homebush Bay and Rhodes. Rhodes Railway station is situated about 500 metres to the east. The bay was contaminated with dioxin and other chemicals by Union Carbide group which led to commercial fishing bans in most of Sydney Harbour and health advisories about limiting the quantity of fish eaten from the Parramattta River. Fishing is prohibited in Homebush Bay for health reasons. Other contamination includes phthalates, lead, polycyclic aromatic hydrocarbons, DDT and heavy metals. The eastern shore of the bay was remediated starting in 2008 to remove about 75% of the dioxin from the bay. Remediation was completed in mid-2010.