Air Quality Program Anchorage Air Quality Standards The US Environmental Protection Agency has set air quality standards for six air pollutants. These are carbon monoxide, ozone, sulfur dioxide, nitrogen dioxide, airborne lead, and two size categories of fine particulates called PM-10 and PM-2.5. Anchorage currently meets standards for all six of these pollutants. However, levels of PM-10, or course particulate, sometimes approach federal standards. Air Quality Program Department of Health and Human Services 825 L Street PO Box 196650 Anchorage AK 99519-6650 Phone: 907-343-4200 TTY: 907-343-4797