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Statewide Emissions Inventories

The annual emissions inventory is one means used by the State to assess the level of pollutants released into the air from various sources. A group of common air pollutants regulated by the Environmental Protection Agency (EPA) are called criteria air pollutants; these pollutants were determined based on their health and/or environmental effects. The second group of pollutants included in this series of tables are the hazardous air pollutants. This inventory summarized emissions for both criteria pollutants and hazardous air pollutants.

State Summary

This table lists all counties in Utah, and the breakdown of the criteria emissions by source (Area/Non-Road Mobile, On-Road Mobile, and Point Sources). Criteria pollutants are those for which National Ambient Air Quality Standards (NAAQS) have been established. Criteria pollutants addressed in these tables are: PM10 , SOx, NOx, VOCs, and CO. The term “criteria pollutants” originated from the fact that standards are based on information published in air quality criteria documents.


Simple pie charts of the impact of various emission sources upon criteria pollutants.

Area/Non-Road Mobile Summaries

These tables list the individual area and non-road mobile emission sources by county. Area sources include mobile and stationary sources too small or too numerous to be treated as individual point sources and biogenic sources which comprise the natural area sources of volatile organic compounds (VOCs) such as forest, vegetation and soils.

On-Road Mobile Summary

This table lists the emissions from highway vehicles by county.

Point Sources Summary

Point Sources include stationary industrial sources and portable equipment (crushers, asphalt plants, etc.) which may move among several counties during a given year. There are two tables to this summary; one lists the actual companies located in each county that generate the emissions, and the other provides a total of all point source emissions by county.

Hazardous Air Pollutants (HAPs)

This table lists the chemicals or chemical classes widely considered to be toxic. These toxic pollutants might cause cancer or have other adverse health effects. By the year 2000, all of the 188 currently defined HAPs are scheduled to have emission standards established.