Figure 5.

Field-measured bioaccumulation factors (log₁₀ BAF, L kg^–1 wet-weight) for perfluorocarboxylates (PFCA), perfluorosulfonates (PFSA), perfluoroalkyl sulfonamides (FASA), and other targeted precursors in whole-body eel and fish samples from sites within the aqueous film-forming foam (AFFF)-impacted and background watersheds. Each marker indicates an individual measurement. Marker type denotes sample site collection, and marker color denotes species. R² and p-values are based on linear regression (shown as solid lines with 95% confidence intervals) of BAF data for C5–C10 PFCA (PFHxA-PFUnDA), C4–C8 PFSA (PFBS–PFOS), and C4–C8 FASA (FBSA–FOSA). Per- and polyfluoroalkyl substances (PFAS) that have a tendency to bioaccumulate (log₁₀ BAF ≥ 3.0) are indicated above the red dotted line. Data originally presented in Pickard et al.¹⁵ are shown in the gray box. Figure S19 shows BAF results for muscle tissue samples, and BAF data are provided in Table S20.