Some environmental groups argue that the EPA can’t legally weaken the regulations. The Safe Water Drinking Act gives the EPA authority to limit water contaminants, and it includes a provision meant to prevent new rules from being looser than previous ones.

The Environmental Protection Agency will rescind and reconsider drinking water standards for four chemicals that have been linked to a range of illnesses.

PFAS has been linked to a series of health issues, including various types of cancer. The Biden Administration had previously set the first-ever federal drinking water limits for