When it comes to the so-called “forever chemicals” known as PFAS, most of the worst health risks come from lots of exposure over a long period of time.
PFAS include thousands of different contaminants. Some of the ones we know the most about were created decades ago and chemical companies have stopped making them — like C8, which used to be on Teflon.
“Those are the ones that regulators are focusing on the most, those legacy PFAS. In part because we think they’re particularly toxic,” said Kirin Furst, an associate professor of civil and environmental engineering at Virginia Tech. “In part maybe just because we have more data about their toxicities.”…