This dataset includes per-and polyfluoroalkyl substances (PFAS) and pharmaceuticals monitored at 62 sampling sites in tributaries of the Laurentian Great Lakes. Chemicals were evaluated in a sediment sample (PFAS only) and water concentrations were estimated using polar organic chemical integrative samplers (POCIS). Sediment samples were collected from the 62 sites in June and July 2018, which were analyzed for 23 PFAS compounds using liquid chromatography tandem mass spectrometry (LC/MS/MS). Duplicate sediment samples were collected at 23 sites. Overall, 22 of the 23 sediment PFAS compounds analyzed were detected in samples from at least one site. Pharmaceuticals and PFAS samples were collected instream by deploying two POCIS at each site for approximately 30 days during the period of May through October 2018. POCIS were compromised at two sites, so POCIS data are only included for 60 of the 62 sites. POCIS blanks and replicates were also collected at six sites. Replicate POCIS were deployed within the same stream cross section. Blanks were collected by exposing prepared POCIS to the air during the time it took to deploy and retrieve the sampler. POCIS blank samples were extracted along with field samples at the end of the deployment period. POCIS extracts were analyzed for 107 pharmaceuticals (USGS National Water Quality Laboratory schedule 2440). A separate POCIS extract was analyzed for 34 PFAS using high-performance liquid chromatograph (HPLC) coupled to a triple quadrupole mass spectrometer (MS/MS). Of these compounds, 49 pharmaceuticals and 17 PFAS had POCIS uptake rates, allowing calculations of time-weighted mean concentration over the approximately 30-day deployment. Collectively, there were 69 pharmaceuticals and 21 PFAS detected in environmental POCIS samples.

This study assessed site-specific differences in PFAS in fish from Ashumet Pond (2020 & 2022), Sudbury River (2023), and Great Herring Pond (reference site; 2022) in Massachusetts. Largemouth bass were collected from all sites and banded killifish were collected from Ashumet Pond only. Health assessments were performed and included histology of the liver, spleen, kidneys, gonad, and any abnormalities. Plasma was tested for 40 PFAS analytes. Pieces of liver were analyzed for the abundance of gene transcripts associated with contaminant metabolism, thyroid function, immune function, stress, oxidative stress, etc. Largemouth bass collected from Ashumet Pond in 2020 were also tested for PFAS in the muscle and liver. Whole banded killifish were analyzed for PFAS for a trophic-level comparison to largemouth bass.

Samples were collected for a comparison method development study with the University of Minnesota and the U.S. Geological Survey (USGS) National Water Quality Laboratory (NWQL) in Lakewood, Colorado. Widely used liquid chromatography-tandem mass spectrometry (LC-MS/MS) methods fail to capture large fractions of total organofluorine in environmental samples confounding the assessment and remediation of fluorinated pollution. Fluorine nuclear magnetic resonance (19F-NMR) is an inclusive method for organofluorine analysis that preserves chemical information about chemical compound classes of organofluorine.

This data release presents chemical and biological results from an investigation of the uptake of per- and polyfluoroalkyl substances (PFAS) from groundwater contaminated by fire training activities on Cape Cod, Massachusetts. Exposure experiments were conducted from August 29 to September 21, 2018 using groundwater from a relatively uncontaminated reference site and a fire training area contaminated site. To assess the uptake characteristics of the PFAS mixtures present in the 2 groundwater sources, 21-day mobile laboratory exposure experiments were conducted using fathead minnows (Pimephales promelas), polar organic chemical integrative samplers, and polyethylene tube samplers. Freshwater mussel (Ligumia subrostrata) exposure experiments were conducted for 14 days, beginning on day 7 of the fish and passive sampler exposures. Groundwater samples were collected daily (with a few exceptions). Samples for male fish and passive samplers were collected on days 0, 4, 7, 14, and 21. Samples for female fish were collected on days 0, 7, 14, and 21. The 14 day mussel exposures began on day 7 of the fish and passive sampler exposures, and mussel samples were collected on days 7, 11, 14, and 21. Groundwater site locations and well characteristics are presented in Table 1. Information on the various PFAS and co-occurring contaminants measured in the different media are presented in Table 2. Quality assurance results for PFAS analysis of the different media are presented in Table 3. Results for PFAS in groundwater are presented in Table 4. Results for co-occurring contaminants in groundwater are presented in Table 5. Results for fish biomarkers are presented in Table 6. Results for PFAS in male and female fish tissue are presented in Table 7. Results for PFAS in mussel tissue are presented in Table 8. Results for PFAS in polar organic chemical integrative samplers are presented in Table 9. Results for PFAS in polyethylene tube samplers are presented in Table 10.

This dataset contains the concentration and quality assurance results for 34 per- and polyfluoroalkyl substances (PFAS). 409 residential and commercial tapwater samples were collected once between May 2021 and May 2022, in the contiguous U.S., Alaska, Hawaii, Puerto Rico, and U.S. Virgin Islands. Of these samples 252 were from publicly supplied tapwater locations, and 155 were sourced from private wells, springs or catchment vessels. Additionally, three surface-water samples were collected in New Hampshire (as denoted with a site code suffix of '_SW' in Table 2a). An additional 85 samples were collected at 3 locations (privately sourced tapwater samples in New Jersey (30) and South Carolina (20), and a publicly supplied source in New Jersey (35)) between September 27, 2021 and December 20, 2021 to evaluate PFAS concentrations over time. Individual homeowner kits were shipped with supplies and protocols so the homeowner could collect and return the samples for analysis. Thirty-six quality-assurance field-blank samples were also collected. Quality-assurance matrix spike and surrogate percent recovery results are also presented. Samples were analyzed at the U.S. Geological Survey, National Water Quality Laboratory in Denver, Colorado. For privacy purposes, all sample locations are anonymized.

This metadata record contains one table and one shapefile with results from field sampling at locations of groundwater discharge (seeps) identified by autonomous boat survey at the Lower Darby Creek Area (LDCA) Superfund Site, near Folcroft, Pennsylvania, in 2024. Included in the dataset are (1) PFAS concentrations, volatile organic compound (VOC) concentrations, cations/trace metals data, total organic carbon (TOC) content, anion concentrations, dissolved gas concentrations, total and ferrous iron concentrations, sulfide concentrations, water quality measurements, and their associated field sampling information for porewater samples collected from seeps and (2) water quality parameters (pH, turbidity, dissolved oxygen, specific conductance, and water temperature) and coordinates measured in creeks in LDCA by a remote-controlled autonomous boat as part of seep identification surveys.

These data were collected to understand the occurrence of per- and polyfluoroalkyl substances in drinking water samples at public water systems identified to have perfluorooctanoic acid or perfluorooctane sulfonic acid above laboratory reporting levels in previously collected raw-water samples, and provide a review of the analytical results. The West Virginia Department of Health and Human Resources will use this data to determine the potential risk to public health from PFAS contamination in these public water systems.