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摘要: Perfluoroalkyl substances (PFAS) have recently received increased research attention, particularly concerning aquatic organisms and in regions of exposure to Aqueous Film Forming Foams (AFFFs). Air Force bases historically applied AFFFs in the interest of fire training exercises and have since expressed concern for PFAS contamination in biota from water bodies surrounding former fire training areas. We monitored six PFASs, including perfluorooctane sulfonate (PFOS), in aquatic species from eight bayou locations at Barksdale Air Force Base in Bossier City, Louisiana over the course of one year. Our focus was to evaluate temporal and spatial variability in PFAS concentrations from historic use of AFFF. PFOS concentrations in fish tissues peaked in early summer, and also increased significantly downstream of former fire training areas. Benthic organisms had lower PFOS concentrations than pelagic species, contrary to previous literature observations. Bioconcentration factors varied with time, however were reduced as compared to previously reported literature values. Here we report the highest concentration of PFOS in whole fish (9,349 ng/g dw), with 15% of samples exceeding what we believe to be the maximum whole fish concentration reported to date of 1,500 ng/g ww. Future studies to measure PFAS in larger fish and tissue specific partitioning data to compare to the current whole fish values are ongoing. The high concentrations observed presently could have effects for higher trophic level organisms in this system or potential risk to humans consuming contaminated fish. This article is protected by copyright. All rights reserved