( April 21, 2025, 10:12 AM EDT) -- SAN FRANCISCO — A group of environmental nonprofits filed suit against the U.S. Environmental Protection Agency in federal court pursuant to the Clean Air Act (CAA) for failing “to perform two nondiscretionary duties” in regard to the 1997 8-hour ozone National Ambient Air Quality Standard (NAAQS), thus causing a “public health crisis” from the level of air pollution in the San Joaquin Valley in California....