Evacuation orders remained in place for about 50,000 people in Garden Grove, California, located south of Los Angeles.
The Pennsylvania Attorney General launched an investigation into the spill this week.
The leak was confirmed at the end of January, but residents say they suspected it as far back as 2023, originating in the Mt. Eyre community
Energy Transfer will have to install point-of-entry-treatment systems to over 100 homes in the Mt. Eyre neighborhood, the DEP orders.
Several residents in Upper Makefield Township said they can smell and taste gasoline in their well water and have been using bottled water to cook with and drink.
Authorities have confirmed that two people died and at least 35 were injured after a chemical leak at a Texas facility on Thursday evening.