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PFAS Investigation &
Management Program

RAAF Base Williamtown

Williamtown Management Activities


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

Water Management Activities


Water Assistance

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



Town Water Connections

As part of a long-term and precautionary measure for the supply of drinking water, Defence is funding Hunter Water to provide access to the reticulated water supply system to residents who live within the Williamtown Management Area. For further information, read the Hunter Water Connections advice on the support page or download the factsheet here.

Water Treatment Plants

Defence is operating multiple water treatment plants at RAAF Base Williamtown to remove PFAS from the Base and the surrounding area. Click on the tabs below for further information.

How do the plants work?

Emerging Compounds Treatment Technologies

Moors Drain | Former Fire Training Area | Southern Area

Synergy Resource Management

Lake Cochran

(click to expand)

Lake
Cochran

The Lake Cochran water treatment plant

The Lake Cochran water treatment plant is an interim measure to treat water leaving Lake Cochran while Defence continues to identify and investigate long-term management options, specifically targeted towards Lake Cochran.

The plant combines various water treatment techniques consecutively to create a multi-barrier treatment process. Each of these techniques have been individually proven to reduce PFAS concentrations. However by combining the techniques, the Lake Cochran plant is able to reduce PFAS concentrations to below the levels of the adopted screening criteria.

The Lake Cochran water treatment plant was developed by Synergy Resource Management. Futher information about the treatment technology is available on the Synergy Resource Management 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.

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.

2016/17 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.


The initial report was a summary of the results from 30 November 2016 until 9 March 2017.

Former Fire
Training Area

Water Treatment Plant
Installation of the Former Fire Training Area Water Treatment Plant

In July 2018 Defence completed comissioning a water treatment plant at the Former Fire Training Area located on RAAF Base Williamtown. This location was identified as a key source area of PFAS contamination.

The plant takes PFAS contaminated groundwater from a field of 15 extraction bores, specifically placed to target PFAS from the former fire training area, and then uses successfully proven resin technology to remove PFAS from the water. The treated water is then distributed via a collection of sprinklers, reducing the PFAS contamination at and around the source area.

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.

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.

Moors
Drain

Water Treatment Plant
The Moors Drain Water Treatment Plant is transported from a C-17 at RAAF Base Williamtown.

Defence has installed a water treatment plant at Moors Drain in RAAF Base Williamtown to reduce the amount of PFAS leaving the Base.

The plant has been operating since June 2017 and is the first of its kind in Australia. It uses a regenerable and strong adsorbent synthetic resin with ion exchange functionality to remove PFAS from water in Moors Drain. Treated water is then discharged back into Moors Drain before it leaves the Base.

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.

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.

2017 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.

Southern
Area

Defence will install a fourth water treatment plant at RAAF Base Williamtown in early 2019. The plant will be installed on Base, however it will treat groundwater extracted from the centre of the PFAS plume to the south of the Base.

Defence will provide further information as the planning and installation progresses.