Testing shows potentially harmful chemicals, known as PFAS, aren’t widely contaminating the more than 1,500 public drinking water systems in Ohio. That’s according to the state’s Environmental Protection Agency. Those manmade chemicals, sometimes called “forever chemicals” because they persist in the environment, are used in products such as carpeting, cookware and firefighting foam, and have turned up in drinking water across the U.S. To better understand the prevalence in Ohio, the state tested water systems serving communities, schools, day cares and mobile home parks this year. There was no sign of PFAS compounds in 94% of the places tested.