Treatment of Perfluorinated Compounds to Protect Two Drinking Water Supplies

Even with the recent EPA reductions in Health Advisory levels (May 2016) for perfluorooctanoic acid (PFOA) and perfluorooctane sulfonate (PFOS), the debate continues regarding acceptable exposure levels in drinking water supplies. Sources of PFASs include industrial and commercial product manufacturing and firefighting foams associated with air force bases and airports. These highly stable contaminants are persistent within our natural environment, encompass a family of dozens of compounds, and may have unique health effects.

Two different sites, one each in New Hampshire and Vermont, have experienced PFOS/PFOA contamination and have provided excellent opportunities for research of effective treatment with regard to drinking water. Treatment alternatives, risk reduction measures, public education efforts and medical monitoring efforts are consistently being evaluated. Pilot testing has been completed to analyze the effects of carbon treatment on the water systems, with a focus on maintaining adequate corrosion control and confirming the appropriateness of large-scale treatment designs. Demonstration testing of the same technology is ongoing to evaluate the effectiveness and develop a better understanding of carbon treatment over the long-term. This presentation discusses the implementation of both the Pilot testing and Demonstration project in the larger context of providing safe drinking water and maintaining an awareness of public demand and public health.