Category: Air Quality

  • National Emission Standards for Hazardous Air Pollutants (NESHAPs):
    Hazardous Air Pollutants and Small Business

    NESHAPs are regulations that regulate specific processes, like dry cleaners, that use specific chemicals, like perchloroethylene, called a hazardous air pollutant. If you can change your chemicals to a chemical that is not one on the list of HAPs you can avoid the rule. Below are the most commonly used small business NESHAPs with customized…

  • Air Quality Modeling Program

    Why Do We Need Models? The Division of Air Quality regularly measures the concentration of specific air pollutants at selected monitoring locations. However, the Division also needs the ability to make future projections of air pollution levels. Computer models are a relatively inexpensive and expedient means of providing this air quality information. For example, models…

  • Geographic Information Systems (GIS):
    Air Quality Modeling Program

    The Division has used Geographic Information Systems (GIS) for air quality modeling studies since 1993 by creating its own database of relevant spatial layers. This data helps in the creation of emission inventories for ozone and fine particulate modeling. This is done through the creation of demographic surrogates so that county-wide emissions can be further…

  • Regional Scale Air Pollution Modeling:
    Air Quality Modeling Program

    What Is An Air Pollution Model? A computer model simulates the meteorological conditions and chemical reactions that chemical govern air pollution formation and transport. Why Do We Need Air Pollution Models? How Are Air Pollution Models Used? Can We Believe The Model? DAQ’s Modeling Tools DAQ follows EPA guidelines and recommended models for all of…

  • Exceptional Events Program

    Exceptional events are unusual or naturally occurring events that can affect air quality but are not reasonably controllable using techniques tribal, state or local air agencies may implement in order to attain and maintain the National Ambient Air Quality Standards. Exceptional events are events for which the normal planning and regulatory process established by the…

  • Fireworks:
    Exceptional Events Program

    The Division on Air Quality would like to help Utah residents celebrate safely by reminding everyone of the potential for high concentrations of smoke associated with fireworks displays. This smoke is largely particulate matter (PM). In prior years, DAQ has monitored extremely high concentrations of both PM10 and PM2.5 (the fine and the very fine…

  • Documentation:
    Exceptional Events Program

    The following is a list of exceptional events documents that have been submitted to EPA since 2008. High Wind Events 2015 2010 2009 2008 Wildfire Events 2017 2015 2013 2012 2009 2008 Fireworks Events 2017 2014 2013 2012 2011 2010 2009 2008

  • Windblown Dust:
    Exceptional Events Program

    In dry areas like Utah, windblown dust maybe a significant air pollution problem. From spring through fall, unusually high winds can combine with dry surface conditions to result in dust storms. These dust storms can lead to extremely high levels of particulate matter in the air. Much of this PM is small enough to be…

  • Statewide Emissions Inventories

    The following links contain inventories developed for statewide criteria and hazardous air pollutants. If comparing inventories, the reader should note that emission estimation methods and emission factors are continually changing and improving, which may cause emissions to appear higher or lower from one year to the next without any actual emission change. In addition, the…

  • 1996:
    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…

  • 1999:
    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…

  • 2002:
    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…

  • 2005:
    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…

  • 2008:
    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…

  • 2011:
    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…

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