HydroVisions | Winter 2021

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Treatment of PFAS in Groundwater - An Overview

BRUCE MARVIN, JOHN MERRILL, BALAJI SESHASAYEE, MANMEET “MEETA” PANNU, JIM STRANDBERG

PFAS Overview Per- and polyfluoroalkyl substances (PFAS) have garnered significant scientific, regulatory, and public attention due to their recalcitrant, ecological persistence, and widespread occurrence – thus the moniker “forever chemicals”. PFAS has been detected in groundwater and in finished drinking water throughout the United States. Six PFAS were included in the Third Unregulated Contaminant Monitoring Rule, which required sampling of finished drinking water from a subset of U.S. public water systems between 2013 and 2015. Of the samples collected from water systems with a groundwater source, 1.2% contained perfluorooctanoic acid (PFOA) at or above the minimum reporting level of 20 nanograms per liter (ng/L).1,2

PFAS Monitoring

1

United States Environmental Protection Agency, 2017. The third unregulated contaminant monitoring rule: data summary. January. https://www.epa.gov/sites/default/ files/2017-02/documents/ucmr3-data-summary-january-2017. pdf 2 Hu et al., 2016. Detection of Poly- and Perfluoroalkyl Substances (PFASs) in U.S. Drinking Water Linked to Industrial Sites, Military Fire Training Areas, and Wastewater Treatment Plants. Environ Sci Technol Lett. 11; 3(10): 344–350.

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2021 Winter Issue