PFAS Soil Science Is Shifting the Risk Conversation

New CSIRO-led research looks beyond PFAS levels to behavior in soil, hinting at faster, smarter ways to assess environmental risk

30 Jan 2026

Researchers in Australia are testing new ways to evaluate contamination from PFAS, a class of persistent chemicals that has become a growing concern for regulators, industry and communities. The work, led by the Commonwealth Scientific and Industrial Research Organisation, focuses on how these chemicals move through soil, a factor that often determines whether contamination spreads into groundwater or remains relatively contained.

Traditional assessments have emphasized how much PFAS is present at a site. Yet scientists involved in the research say concentration alone can provide an incomplete picture of risk. Chemical behavior in soil, including how readily PFAS leaches under certain conditions, plays a central role in long-term exposure and cleanup costs, according to researchers familiar with the work.

The CSIRO team is combining established leaching tests with newer analytical techniques, including mid-infrared spectroscopy, to better understand how soil composition influences PFAS mobility. The approach is still being developed and validated, but early findings suggest it could serve as a rapid screening tool. Used alongside conventional laboratory analysis, it could help identify higher-risk sites earlier and guide more targeted investigations.

Industry advisers say the research reflects a broader shift in how environmental risk is being framed. Firms such as CDM Smith have previously noted that reliance on concentration data can mask differences in how contaminants behave under real-world conditions. Tools that clarify those dynamics could eventually support more proportionate remediation strategies, analysts said, though they cautioned that practical application will depend on regulatory acceptance.

Collaboration has been central to the effort. CSIRO is working with the University of Adelaide and international partners to test the methods across a range of soil types and to align findings with evolving leaching standards. Observers say such cross-institutional work is increasingly important as PFAS regulations tighten globally and expectations for environmental disclosure rise.

Significant challenges remain. The methods are not yet recognized in formal guidance, and broader validation will be required before they can influence routine practice. Organizations may also need new expertise to interpret the results. Still, as PFAS liabilities grow and traditional testing remains costly and time-consuming, behavior-based assessment is drawing attention as an approach that could shape future decision making.