Tag: Mobile Source Emissions

Winter Measurements of Heavy-duty Vehicles to Characterize the Cold Temperature Effectiveness of Selective Catalytic Reductions Catalyst in Controlling Oxide of Nitrogen Emissions

The Salt Lake City region in Utah experiences periods of high particulate levels in the winter months due to the combination of its topography, winter atmospheric inversions and local emissions. Secondary nitrate particles comprise the dominant fraction of the particles in these episodes and are the result of the reaction of oxides of nitrogen (NOx) with ammonia. A significant fraction of NOx emissions in the Salt Lake City area are produced by heavy-duty vehicles operating in or traveling through the area on the interstate highway system. This study will measure wintertime NOx emissions from local heavy-duty vehicle activity in order to improve Utah DAQ emissions inventory estimates and better inform policy.

• Gary Bishop (University of Denver)
• Funded by Science for Solutions Research Grant: $52,000

County Smoking Vehicle Reporting Program Contacts:
Mobile Sources and Transportation Program

Cache County: (435) 792-6570 Davis County: (801) 546-8860 Salt Lake County: (385) 468-7664 Utah County: (801) 851-7600 Weber/Morgan Health Department: (801) 399-7140 Forms Report a Smoking Vehicle: Davis County Web Form Report a Smoking Vehicle: SL County Web Form Report a Smoking Vehicle: Utah County Web Form Report a Smoking Vehicle: Weber/Morgan Counties Web Form

Taking Stock of Emissions in Utah

Air pollution along the Wasatch Front comes from a lot of different sources. The Utah Department of Environmental Quality’s Division of Air Quality works deliberately and tirelessly to understand the sources of air-quality-deteriorating-emissions and how to reduce them to improve air quality.

Rethinking Our Relationship with Cars

In the coming decades, Utah residents will grapple with the most responsible use of the automobile and its place in our lives.

Ammonia Emission Assessment from Diesel and Gasoline Engines under Utah Specific Conditions

To better understand the contribution of automobiles to Utah ammonia emissions, tailpipe ammonia (NH3) measurements will be taken in laboratory and on-road settings for an array of diesel and gasoline vehicles representative of Utah’s vehicle fleet.

• Principal Investigators: Randal S. Martin (USU), Joe Thomas (UDAQ), John Sohl (WSU)
• Funded for: $59,958

Cold Start/Idling Emissions

Relevant Documentation Scope of Work (7.2 KB) Final Report Principal Investigator: Randy Martin (USU), Joe Thomas (WSU) Reducing automobile emissions has been a central component of the state’s plans to improve air quality. Unfortunately, there is little literature or data that identify the benefits or consequences from changes to the way individuals and fleets start …