The E.P.A. said it would maintain limits on the two most common PFAS chemicals found in tap water but roll back rules for four others.

The state claimed ‘forever chemicals,’ also known as PFAS, contaminated groundwater from an industrial park where they were used for decades.

Experts say the moves, which would apply to household appliances, will raise energy costs for consumers.

Since 1997, New York City has purchased more than 1,800 properties to protect its drinking water. No longer.

Water supplies ran dry in the Pacific Palisades fire, in part because a reservoir was shut down for repairs. Records show the city had tried and failed to prepare an alternative reservoir.

A new proposal to combat PFAS contamination, announced by the Environmental Protection Agency, left critical questions unanswered.