In the case of the other two compounds, Olson says the EPA can’t legally extend the deadline for utilities to comply. The Safe Drinking Water Act allows for a maximum of five years for utilities to meet new requirements, and that’s already in place.

The Environmental Protection Agency said Wednesday that it plans to weaken limits on some “forever chemicals” in drinking water that were finalized last year, while maintaining standards for two common ones.

The administration said it wants to rescind and reconsider whether limits are needed for four PFAS that chemical companies are still producing and using in the U.S. — despite known health risks.