Health & Environmental Research Online (HERO)


Print Feedback Export to File
5024208 
Journal Article 
Monthly Variations in Perfluorinated Compound Concentrations in Groundwater 
Steele, M; Griffith, C; Duran, C 
2018 
Toxics
ISSN: 2305-6304 
English 
Large-scale manufacturing of poly- and perfluorinated compounds in the second half of the 20th century has led to their ubiquity in the environment, and their unique structure has made them persistent contaminants. A recent drinking water advisory level issued by the United States Environmental Protection Agency lowered the advisory level concentration of perfluorooctanesulfonic acid (PFOS) and perfluorooctanoic acid (PFOA) from 200 nanograms per liter and 400 nanograms per liter, respectively, to 70 nanograms per liter separately or combined. Small temporal variations in PFOS and PFOA concentrations could be the difference between meeting or exceeding the recommended limit. In this study, newly sampled data from a contaminated military site in Alaska and historical data from former Pease Air Force Base were collected. Data were evaluated to determine if monthly variations within PFOS and PFOA existed. No statistically significant temporal trend was observed in the Alaska data, while the results from Pease, although statistically significant, showed the spread of observed contaminant concentrations around the fitted line is broad (as indicated by the low R² values), indicating that collection date has little value in predicting contaminant concentrations. Though not currently the subject of a US EPA health advisory, data on perfluorobutanesulfonic acid (PFBS), perfluorohexane sulfonic acid (PFHxS), perfluoroheptanoic acid (PFHpA), and perfluorononanoic acid (PFNA) were collected for each site and their average concentrations evaluated. 
• PFBS
     Search Update 5/2019
          PubMed
• PFHpA
     Literature Search Update 2017-2019
          PubMed
• PFHxS
     LitSearch: Feb 2018 - May 2019
          PubMed
• PFNA
     PFNA May 2019 Update
          Pubmed
• PFOA (335-67-1) and PFOS (1763-23-1)
     Literature Search Update (2013-2019)
          PubMed