The Serpentine River is a river in the South West region of Western Australia. It is known as Waangaamaap Bilya to the Indigenous Bindjareb people, who met, lived and fished there before British settlement.[2]
The upper reaches of the river flow into Serpentine Dam, which provides drinking water to the Perth metropolitan area.
The only tributary to the Serpentine River is Big Brook. Additionally, the Peel Main Drain discharges into the Serpentine River at Karnup.[3] The river also flows through Kerulup Pool, Lake Amarillo and Goegrup Lake.
The river is known to have toxic algal blooms, last occurring in 2007. Algal blooms usually occur after hot weather and in the upper reaches of the river.[4]