Maintaining state primacy in matters of environmental regulation is a priority for the Wyoming Department of Environmental Quality. The primary purpose is to protect the health of the citizens of Wyoming and preserve our air quality resource while working with industry to promote sustainable economic development. Maintaining the National Ambient Air Quality Standards (NAAQS) is critical to ensure Wyoming will retain primacy to administer necessary programs associated with the NAAQS. This in turn preserves U.S. Environmental Protection Agency’s (EPA) U.S. Environmental Protection Agency’s approval of corresponding State Implementation Plans (SIPs). Without an approved SIP for a specific responsibility, the EPA will institute a Federal Implementation Plan (FIP) and become the authority for that requirement in Wyoming.
Be in compliance with the NAAQS for the six criteria pollutants: particulate matter (PM10, PM2.5), nitrogen dioxide (NO2), sulfur dioxide (SO2), carbon monoxide (CO), ozone (O3), and lead (Pb). Currently, Wyoming is in compliance with the NAAQS for all of these pollutants statewide except for ozone in the Upper Green River Basin (UGRB) area and annual PM10 in the City of Sheridan.
Wyoming Department of Environmental Quality – Air Quality Division
U.S. Environmental Protection Agency, U.S. Bureau of Land Management