( September 4, 2025, 2:15 PM EDT) -- SAN FRANCISCO — Several environmental nonprofits filed suit in federal court in California against the U.S. Environmental Protection Agency alleging violation of the Clean Air Act (CAA) for “failing to make a determination of attainment” by a June 2025 deadline for the 2006 24-hour National Ambient Air Quality Standard (NAAQS) for fine particulate matter measuring 2.5 microns or less (PM2.5) in the San Joaquin Valley....