Williamtown PFAS contamination requires source elimination

Williamtown has served as a primary case study for PFAS contamination in Australia for over a decade. The contamination, caused by decades of firefighting foam use, has created a plume that reaches Fullerton Cove and has led to the establishment of a ‘red zone’, class action lawsuits, and a $2 billion claim by the Commonwealth against 3M.

Since 2018, the Department of Defence has been engaged in remediation efforts. A plant on the south-western boundary currently processes one million litres of contaminated groundwater daily. However, current methods focus on managing the existing plume rather than eliminating the source. Contaminants continue to leach from six specific areas on the base, including fire training areas, the fire station, Lake Cochran, and refueling yards.

Investigations indicate that PFAS has permeated soil, pavements, drains, and pits, meaning the substance continues to release into the environment during rainfall. While monitoring shows decreased concentrations near source areas, levels across the wider management area remain largely unchanged due to ongoing migration.