Utah needs to develop a State Implementation Plan (SIP) to meet revised federal health standards for fine particulate matter (PM2.5) due to high PM2.5 concentrations that occur during winter temperature inversions. Preliminary modeling shows that control strategies will need to reduce emissions from various sources including mobile, point, area and precursor sources to demonstrate attainment of the standards. Stakeholder involvement will be important as the SIP is developed over the next three years.