Chemical concentration results for assessment of mixed-organic/inorganic chemical exposures in the southeast United States, beginning 2022

This data release contains the concentration and quality-assurance results for inorganic constituents, organic compounds (volatile organic compounds [VOC], per- and polyfluoroalkyl substances [PFAS], pesticides, and disinfection byproducts [DBP]) collected in tapwater from locations in Alabama and Mississippi. Tapwater samples (11 public supply and 1 private well) were collected on December 13-14, 2022, in Dallas and Wilcox Counties, Alabama. Fifteen tapwater samples (14 public supply and 1 private well) were collected in Panola and Oktibbeha Counties in Mississippi on February 6-7, 2024. Pharmaceuticals (for Alabama samples only), VOC, and PFAS were analyzed at the U.S. Geological Survey (USGS) National Water Quality Laboratory (NWQL) in Denver, Colorado. Pharmaceutical samples for the 15 samples collected in Mississippi, were analyzed at the USGS Organic Geochemistry Research Laboratory (OGRL) in Lawrence, Kansas. Pesticides and DBP were analyzed at the USGS Organic Chemistry Research Laboratory (OCRL) in Sacramento, California. Inorganic contaminants were analyzed at the USGS Redox Chemistry Laboratory (RCL), Boulder, Colorado, and the Analytical Trace Element Chemistry Laboratory (ATECL), Boulder, Colorado. Microbiological indicators were analyzed for samples collected in Mississippi at the Michigan Bacteriological Research Laboratory in Lansing, Michigan.