New Hampshire will join New Jersey, New York, and Vermont in re-evaluating what is considered a safe level of fluorochemicals in drinking water.

Gov. Chris Sununu (R), a former environmental engineer, signed a New Hampshire groundwater protection bill (SB 309) into law July 10.

The new law calls for the state’s Department of Environmental Services to “set maximum contaminant limits for perfluorooctanoic acid (PFOA), perfluorooctanesulfonic acid (PFOS), perfluorononanoic acid (PFNA), and perfluorohexane sulfonic acid (PFHxS)" by Jan. 1, 2019.

Once widely used in making nonstick cookware, fire-retardant upholstery coatings, and other consumer products,...