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PFAS Investigation &
Management Program

Army Aviation Centre Oakey

Oakey Management Activities


Defence is undertaking a range of precautionary management activities in Oakey. The aim of these activities is to remove PFAS from the environment and limit PFAS migration pathways.

Water Assistance


Defence is providing alternative sources of drinking water, as an interim and precautionary measure, to eligible residents located within the Oakey management area. For further information read the Drinking Water advice on the support page.

As part of a long-term and precautionary measure for the supply of drinking water, Defence funded Toowoomba Regional Council to provide access to the reticulated water supply system to residents who live within the Oakey Management Area. For further information, read the Toowoomba Regional Council advice on the support page or download the factsheet here.

Water Treatment Plants

Former Fire Station
Water Treatment Plant

Former Fire Station Water Treatment Plant
Former Fire Station Water Treatment Plant
Since September 2017, a water treatment plant has been operating at Army Aviation Centre Oakey (AACO) at the Former Fire Station. The plant is treating contaminated groundwater on the Base and reinjecting the treated water back into the aquifer to remove PFAS from the environment.

The plant was developed by Emerging Compounds Treatment Technologies (ECT2). More information about the treatment technology is available on the ECT2 website.

2019 Water Sampling Results

The Water Sampling Summaries track the PFAS concentrations against the limits defined by the relevant adopted drinking water screening criteria. They include results for perfluorooctanoic acid (PFOA), 6:2 fluorotelomer sulfonic acid (6:2 FTS) and the sum of perfluorooctane sulfonic acid (PFOS) and perfluorohexane sulfonic acid (PFHxS).

The water quality data is drawn from water samples on both untreated and treated water. The summaries of water sampling results can be downloaded below.

2017 - 2018 Water Sampling Results

The Water Sampling Summaries track the PFAS concentrations against the limits defined by the relevant adopted drinking water screening criteria. They include results for perfluorooctanoic acid (PFOA), 6:2 fluorotelomer sulfonic acid (6:2 FTS) and the sum of perfluorooctane sulfonic acid (PFOS) and perfluorohexane sulfonic acid (PFHxS).

The water quality data is drawn from water samples on both untreated and treated water. The summaries of water sampling results can be downloaded below.

Fire Training Area
Water Treatment Plant

PFAS Water Treatment Plant Process
Fire Training Area WTP | Image courtesy of OPEC
In late 2018, a second water treatment plant arrived at Oakey to treat groundwater near the current fire training facility, another of the major PFAS source areas on the Base.

The plant was installed during the first quarter of 2019 and is currently in the final stages of its commissioning process which is expected to be completed in the second quarter of 2019.

This plant uses foam fractionation/separation technology which involves generating foam from affected groundwater. The foam, containing PFAS, is then collected from the surface and treated.

The plant was developed by OPEC. More information about the treatment technology is available on the OPEC website.

2019 Water Sampling Results

The Water Sampling Summaries track the PFAS concentrations against the limits defined by the relevant adopted drinking water screening criteria. They include results for perfluorooctanoic acid (PFOA), 6:2 fluorotelomer sulfonic acid (6:2 FTS) and the sum of perfluorooctane sulfonic acid (PFOS) and perfluorohexane sulfonic acid (PFHxS).

The water quality data is drawn from water samples on both untreated and treated water. The summaries of water sampling results can be downloaded below.