Australia’s PFAS fight has become a test of who carries the permanent cost of contamination
More than 13bn litres of water and 200,000 tonnes of contaminated soil later, Australia’s fight over PFAS contamination has arrived in court carrying a bill that already exceeds $1bn. The chemicals seeped through defence bases, wetlands and water systems for decades before Canberra decided to pursue one of the world’s largest industrial manufacturers. “This is a government that is prepared to take on one of the biggest multinational corporations in the world,” attorney-general Michelle Rowland said, framing the dispute not simply as environmental remediation but as a test of whether governments can force global chemical producers to absorb liabilities that taxpayers have carried for years.
The government alleges 3M and 3M Australia withheld and misrepresented information about the effects of aqueous film-forming foam, failed to disclose what they knew about environmental risks, and provided assurances about disposal and safety that were inconsistent with what the company knew. Canberra’s legal claim targets the financial architecture behind contamination itself: the transfer of cleanup costs from manufacturers to the public sector. Defence officials say the contamination spread across 28 defence bases, forcing an enormous remediation campaign whose costs continue to rise long after the chemicals themselves were phased out.
The timeline leaves both governments and corporations exposed. Defence began phasing out PFAS chemicals in 2004, yet a spokesperson for 3M said the company stopped sales of the products “around two decades ago” and never manufactured PFAS in Australia. At the same time, the Department of Defence continued using PFAS-containing firefighting foams for nearly two decades longer, according to a legislative committee report cited by the company. Each side is now attempting to reposition itself as the actor that recognised the danger first, because liability increasingly follows the chronology of knowledge rather than the chronology of contamination.
What began as a cleanup dispute is becoming a permanent balance-sheet problem
That chronology matters because PFAS liabilities no longer resemble ordinary environmental disputes. 3M funded cleanup efforts for public water systems in the United States in 2023, while the company’s own disclosures warned investors that future litigation, remediation costs, regulatory changes and insurance recovery risks could materially affect its financial condition. Those disclosures also acknowledged risks tied to the company’s plans to exit PFAS manufacturing and discontinue use of PFAS across its product portfolio. Once cleanup obligations migrate from isolated settlements into recurring balance-sheet exposures, investors stop treating litigation as a one-off event and start pricing it as a structural cost of doing business.
Australia’s legal escalation lands as PFAS litigation broadens from local contamination cases into a durable international claims industry. Litigation is expected to increase as PFAS risks become more widely known. The precedent in the United States already carries a familiar pattern: citizens in Parkersburg, West Virginia, filed a class-action lawsuit against DuPont in 2001, alleging the company contaminated drinking water with C8, a chemical linked to numerous health problems. That case eventually settled for $670m in 2017. Australia has now entered the same cycle. In December 2024, a consumer-led PFAS class action was filed against 3M Australia in the Supreme Court of Victoria, marking the first class action against 3M in Australia related to PFAS contamination.
The contamination itself has proved stubbornly mobile. Defence investigations found that PFAS mainly moves off bases through surface water during wet weather events, while contaminated surface water and groundwater were found mixed in swamps and wetlands. At Mary Creek, Defence acknowledged contamination levels above drinking water guidelines and often above recreational water guidelines. Even where discharge points fell below recreational thresholds, the remediation burden continued expanding. Defence has already spent $11.7m on remediation work at HMAS Creswell and the Jervis Bay Range Facility, with forecast expenditure for future works reaching approximately $80m through 2035.
As liability moves downstream, governments inherit costs they cannot cap
That rolling horizon of expenditure explains why political pressure has shifted beyond the courtroom. Greens spokesperson Peter Whish-Wilson warned that Australia risks becoming a global dumping ground for PFAS products because corporate producers and retailers of plastics and packaging have no obligation to take responsibility for the products they unleash into the world. The costs instead fall on the waste and resource recovery sector, which must manage contaminated materials after manufacturers exit the chain. Once disposal liabilities migrate downstream, local governments, utilities and defence agencies inherit costs they did not create and cannot easily cap.
The companies that moved first to exit PFAS production are not necessarily the ones escaping the damage. 3M set a 2025 deadline to stop producing PFAS chemicals, a decision that initially positioned the company as ahead of tightening regulation. But every remediation project extending into the next decade preserves the commercial relevance of past production decisions. The longer governments spend removing contaminated soil, monitoring wetlands and treating water systems, the more valuable documentary timelines become inside courtrooms and investor disclosures alike. In that environment, the manufacturers that exited earliest still carry the deepest archive of liability.
Australia already paid $133m to settle a PFAS class action in 2023 involving seven sites. The federal government is now attempting to recover costs from the companies it says helped create the contamination in the first place. What began as an industrial firefighting chemical has evolved into a contest over who absorbs the permanent carrying costs of contamination: multinational manufacturers, national defence systems, or taxpayers financing cleanup projects that continue decades after the original foam was sprayed.
