2019 Bickley Brook Reservoir (Western Australia) approx location Site S41
April 2019: 1 PFAS chemical detected. PFOS detected at 23.5 times the 99% ecological default guideline value.
October 2019: 1 PFAS chemical detected. PFOS detected at 2.1 times the 99% ecological default guideline value.
For more information: Perfluoroalkyl and polyfluoroalkyl substances (PFAS) in the Perth metropolitan area
Ambient concentrations in surface water and groundwater
November 2022
PFOS 99% ecological default guideline value: 0.00023ug/L
[Bickley Brook is part of Perth’s drinking water supply. The April 2019 PFOS detection of 0.0054ug/L is 67.5% of the 2025 Australian Drinking Water Guidelines.]