New York State Proposes New Drinking Water Regulations for Four Additional PFAS

On October 5, New York State’s health department proposed new enforceable drinking water standards for four PFAS: perfluorodecanoic acid (PFDA), perfluoroheptanoic acid (PFHpA), perfluorohexane sulfonic acid (PFHxS), and perfluorononanoic Acid (PFNA). The proposed maximum contaminant levels (MCLs) for each are 10 parts per trillion (ppt). These four MCLs are in addition to the two existing standards for perfluorooctanoic acid (PFOA) and perfluorooctanesulfonic acid (PFOS), also 10 ppt each. Additionally, New York is proposing a new combined MCL of 30 ppt for all six PFAS. The proposed regulations were published in the New York State Register and opened a public comment period for 60 days, until December 5.