At its core, the website provides overviews of PFAS across key regulatory and program areas, including drinking water, consumer products, and firefighting foam, as well as site investigation and cleanups. It also addresses PFAS considerations for landfills and biosolids, and summarizes media-specific information for water and air, along with implications for fish and wildlife. The structure supports coordinated compliance planning by enabling readers to evaluate intersecting requirements and policy positions across programs.
NYSDEC also paired the website launch with the release of several new and updated guidance documents, alongside the long-awaited Rural Soil Background Study. These materials appear as “Latest Updates” on the website. Entities with ongoing investigations, remedial programs, waste management operations, or product-related responsibilities should review these updates and consider whether current strategies warrant adjustments.
The Rural Soil Background Study—Key Findings and Regulatory Implications
The Rural Soil Background Study, in particular, may influence how regulators decide whether a property is contaminated and what cleanup is required. The study analyzed nearly 550 soil samples from over 100 rural properties across the state, with all sampling locations situated at least half a mile from factories, landfills, or other obvious pollution sources. The samples, which were analyzed for 40 PFAS chemicals, fell into three categories—samples from areas where people commonly come into contact with soil, such as yards and trails; samples from remote areas away from regular human activity; and samples taken close to a roadway or driveway.
The data revealed that PFAS was widespread even in these seemingly untouched areas: PFOS, one of the most common PFAS chemicals, was detected in over 97% of surface soil samples, while PFOA, another widely studied PFAS chemical, was detected in about three-quarters of samples. These high detection frequencies occurred without any apparent pattern, with results matching those from similar northeastern state surveys. This confirms that PFAS contamination is spread broadly throughout the environment.
Based on this study, NYSDEC proposes to establish PFOA background concentrations of 1.5 parts per billion for surface soils and 1.2 parts per billion for subsurface soils, and PFOS background concentrations of 3.0 parts per billion for surface soils and 0.801 parts per billion for subsurface soils. NYSDEC will consider these values in developing soil cleanup standards for PFOA and PFOS.
Stakeholders should note that these proposed background values significantly exceed the current “protection of groundwater” soil guidance values established by NYSDEC and the New York State Department of Health in April 2023, which are set at 0.8 parts per billion for PFOA and 1.0 parts per billion for PFOS. Moreover, applying the agencies’ own calculations suggests that soils at these proposed background concentrations would result in groundwater concentrations of 13 parts per trillion for PFOA and 8.1 parts per trillion for PFOS, which exceed the current groundwater standards of 6.7 parts per trillion for PFOA and 2.7 parts per trillion for PFOS by nearly two and three times, respectively. The Rural Soil Background Study findings, therefore, carry implications not only for soil cleanup objectives but also for how PFAS contamination is evaluated and addressed more broadly in New York State.
Further Updates
The consolidated website and coordinated guidance rollout underscore NYSDEC’s continued focus on PFAS. Taken together, these developments are likely to shape enforcement priorities, permitting conditions, and remedial expectations in the near term.
