EPA Approves Montana's Air Quality Plan for Visibility
November 27, 2025
November 27, 2025
WASHINGTON, Nov. 27 (TNSFR) -- The U.S. Environmental Protection Agency has approved a state implementation plan (SIP) revision submitted by Montana.
The SIP revision addresses requirements under the Clean Air Act (CAA) and the EPA's Regional Haze Rule (RHR) for the program's second implementation period. The RHR requires state and federal agencies to cooperate to improve visibility in 156 national parks and wilderness areas by reducing visibility impairing pollutants such . . .
The SIP revision addresses requirements under the Clean Air Act (CAA) and the EPA's Regional Haze Rule (RHR) for the program's second implementation period. The RHR requires state and federal agencies to cooperate to improve visibility in 156 national parks and wilderness areas by reducing visibility impairing pollutants such . . .