From [HERE] To avoid responsibility for what many experts believe is a public health crisis, leading chemical companies like Chemours, DuPont and 3M have deployed a potent mix of tactics.

They have used public charm offensives to persuade regulators and lawmakers to back off. They have engineered complex corporate transactions to shield themselves from legal liability. And they have rolled out a conveyor belt of scantly tested substitute chemicals that sometimes turn out to be just as dangerous as their predecessors.

“You don’t have to live near Chemours or DuPont or 3M to have exposure to these things,” said Linda S. Birnbaum, the former head of the National Institute of Environmental Health Sciences. “It is in the water. It is in our food. It’s in our homes and in our house dust. And depending where you live, it may be in our air.”

PFAS substances are known as “forever chemicals” because they do not naturally break down and can accumulate in the environment and in the blood and organs of people and animals.

When the compounds get into water supplies, the effects can be devastating. Around Madison, Wis., residents are advised not to eat the fish from nearby lakes. In Wayland, Mass., residents are drinking bottled water because the tap water is contaminated. In northern Michigan, scientists found unsafe levels of PFAS in the rain. Most Americans have been exposed to at least trace amounts of the chemicals and have them in their blood, according to the Centers for Disease Control and Prevention.

Research by chemical companies and academics has shown that exposure to PFAS has been linked to cancer, liver damage, birth defects and other health problems. GenX was supposed to be a safer alternative to earlier generations of the chemicals, but new studies are discovering similar health hazards.

This week, the Environmental Protection Agency announced that it was going to start requiring companies to test and publicly report the amount of PFAS in the products they make. It is an early step toward regulating the chemicals, though the E.P.A. has not set limits on their production or discharge.

The E.P.A. administrator, Michael S. Regan, who announced the new rules, previously was the top environmental regulator in North Carolina, where he clashed with Chemours over its GenX pollution.

“PFAS contamination has been devastating communities for decades,” Mr. Regan said. “I saw this firsthand in North Carolina.” [MORE]