Regulation & law · 02/12/2014

EPA Proposes Approval of Montana's Second 10-Year Carbon Monoxide Maintenance Plan for Billings

The Environmental Protection Agency (EPA) is proposing approval of a revised State Implementation Plan (SIP) submitted by the State of Montana, which outlines a second 10-year plan to maintain the National Ambient Air Quality Standard (NAAQS) for carbon monoxide (CO) in the Billings area, and an alternative monitoring strategy for the area.