Question: Brown Hill Creek is part of the river that is located in what Australian state?

Context paragraphs:
Patawalonga River: The Patawalonga River is a river located in the western suburbs of the Adelaide metropolitan area, in the Australian state of South Australia.  It drains an area of flat, swampy lands formerly known as the Cowandilla Plains, which in the mid-20th century were drained by engineering works, enabling the establishment of Adelaide Airport and the development of residential housing.

Leggetts Creek: Leggetts Creek (also known as Legget Creek, Leggett's Gap Creek, and Leggits Creek) is a tributary of the Lackawanna River in Lackawanna County, Pennsylvania, in the United States.  It is approximately 9.0 mi long and flows through Scott Township, South Abington Township, and Scranton.  The watershed of the creek has an area of 18.5 sqmi .  The creek has three named tributaries: Leach Creek, Clover Hill Creek, and Summit Lake Creek.  Leggetts Creek is considered to be impaired due to urban development problems, but is not affected by acid mine drainage.  The creek is fairly alkaline and is a perennial stream.  Its headwaters are in wetlands outside of the Lackawanna Valley and it flows through a water gap known as Leggetts Gap or The Notch.  Major lakes in the watershed include the Griffin Reservoir (which is used as a water supply), Summit Lake, and Maple Lake.  The creek is a source of flooding in South Abington Township.

Crafers West, South Australia: Crafers West is a suburb of Adelaide in the Adelaide Hills Council.  It was formally named in 1985 as a separate address from Crafers.  Crafers West contains the headwaters of Brown Hill Creek and is dominated by steep terrain and native scrub.  It is bounded by Mount Barker Road on the northeast and the Bridgewater railway line on the south.  The Eagle Mountain Bike Park is in the north of the suburb.

Brownhill Creek Recreation Park: Brownhill Creek Recreation Park is a protected area located about 8 km south of the Adelaide city centre in City of Mitcham along part of the course of the Brown Hill Creek.  The recreation park was proclaimed under the "National Parks and Wildlife Act 1972" in 1972 to "provide recreation opportunities for the Adelaide and eastern metropolitan region and to conserve remnant aged river red gums and the riparian zone habitat".  The land previously subject to protected area status as a "National Pleasure Resort" since 1915.  The recreation park is classified as an IUCN Category III protected area.

Sideling Hill Creek (Potomac River): Sideling Hill Creek is a 25.2 mi tributary stream of the Potomac River in the U.S. states of Maryland and Pennsylvania.  Sideling Hill Creek flows southward along the western flanks of Sideling Hill, from which the stream takes its name.  It forms the boundary between Allegany and Washington counties in Maryland.

Brown Hill Creek, South Australia: Brown Hill Creek is a south-eastern suburb of Adelaide in the City of Mitcham in South Australia, named after the eponymous Brown Hill Creek.

Brown Hill Creek: The Brown Hill Creek, also known as Willawilla in the Kaurna language, part of the Patawalonga River catchment, is a watercourse located in the western suburbs of the Adelaide metropolitan area, in the Australian state of South Australia.

Electoral district of Brown Hill: The Electoral district of Brown Hill was a Legislative Assembly electorate in the state of Western Australia.  It was named for a local land feature, and covered part of the Goldfields city of Boulder, near Kalgoorlie.  It was created at the 1904 redistribution and was merged in 1911 with the neighbouring seat of Ivanhoe to form the Electoral district of Brown Hill-Ivanhoe.  The only Member for Brown Hill was Thomas Bath of the Australian Labor Party.

Brown Hill, Mitcham: Brown Hill is a hill in the Australian state of South Australia located on the western edge of the Mount Lofty Ranges, 7 km southeast of the centre of Adelaide, in the suburb of Brown Hill Creek.  Brown Hill rises to 312 m above sea level.

Electoral district of Waite: Waite is an electoral district of the House of Assembly in the Australian state of South Australia.  Named after Peter Waite, a 19th entrepreneur and philanthropist in the current area of the electorate, it is a 33.1 km² urban electorate in Adelaide's inner south-east, taking in the suburbs of Brown Hill Creek, Clapham, Hawthorn, Kingswood, Lower Mitcham, Lynton, Mitcham, Netherby, Panorama, Pasadena, Springfield, St Marys, Torrens Park, Urrbrae and Westbourne Park as well as parts of Belair, Colonel Light Gardens, Daw Park and Leawood Gardens.

Supporting paragraphs: Brown Hill Creek Patawalonga River
Answer: South Australia