Category: Air Quality

  • 2005 Statewide Emissions Inventories

    The air emissions inventory is one means used by the state to assess the level of pollutants released into the air from various sources. For the 2005 Statewide Emissions Inventory, two groups of pollutants are estimated by emissions source category: A group of common air pollutants regulated by the Environmental Protection Agency (EPA) are called…

  • 2008 Statewide Emissions Inventories

    The air emissions inventory is one means used by the state to assess the level of pollutants released into the air from various sources. For the 2008 Statewide Emissions Inventory, two groups of pollutants are estimated by emissions source category: A group of common air pollutants regulated by the Environmental Protection Agency (EPA) are called…

  • 2011 Statewide Emissions Inventories

    The air emissions inventory is one means used by the state to assess the level of pollutants released into the air from various sources. For the 2011 Statewide Emissions Inventory, two groups of pollutants are estimated by emissions source category: A group of common air pollutants regulated by the Environmental Protection Agency (EPA) are called…

  • 2014 Statewide Emissions Inventories

    The air emissions inventory is one means used by the state to assess the level of pollutants released into the air from various sources. For the 2014 Statewide Emissions Inventory, two groups of pollutants are estimated by emissions source category: A group of common air pollutants regulated by the Environmental Protection Agency (EPA) are called…

  • Definitions: Statewide Emissions Inventory Program

    Definitions for common terms that may be encountered in an air emissions inventory or in documentation. Ammonia (NH3) A colorless gaseous alkaline compound that is very soluble in water, has a characteristic pungent odour, is lighter than air, and is formed as a result of the decomposition of most nitrogenous organic material. Information Source ..…

  • Statewide Oil & Gas Emissions Inventory

    Utah is home to a wealth of natural resources, particularly in the oil and gas sector. Responsible production of these resources is essential to preserving our state’s beautiful natural landscapes and to prioritizing the public health of our citizens. Oil and gas operators will find web resources here to help them abide by Division of…

  • Air Pollutants

    The Clean Air Act identifies six common air pollutants that are found all over the United States and can injure health, harm the environment or cause property damage. These pollutants include: The United States Environmental Protection Agency (EPA) has established National Ambient Air Quality Standards (NAAQS) for each of these pollutants. If the air quality…

  • Particulate Matter Overview

    Particulate matter (PM), also known as particle pollution, is a complex mixture of small solid particles and liquid droplets in the air. Some particulate matter, like soot, smoke, dust, or dirt, is large enough to see. Fine particulate matter is so small that it can only be seen through an electron microscope. Particle pollution is…

  • Inversions

    Find out how Utah’s unique geography traps pollution during inversions and what it means for winter air quality. Under normal atmospheric conditions, air is warmer near the ground and colder at higher altitudes. In a temperature inversion, the situation “inverts,” and cold air at the surface gets trapped under a layer of warmer air. During…

  • Particulate Matter 2.5 (PM2.5) Overview

    PM2.5 particulates are fine, inhalable particles or droplets with a diameter of 2.5 microns or smaller. These fine particulates, which are about 30 times smaller than the width of a human hair, can travel deeply into the lungs and cause both short-term and long-term health effects. While larger PM10 particulates can compromise respiratory and cardiac…

  • PM2.5 Moderate Area State Implementation Plans (SIPs)(2009-2014)

    Review Utah’s early strategies and regulatory plans to tackle PM2.5 pollution in moderate-level areas across the state. In 2006, the Environmental Protection Agency (EPA) tightened the 24-hour PM2.5 standard from 65µg/m3 (microgram per cubic meter) to 35µg/m3. While the state was in attainment under the previous 24-hour standard, all or parts of seven Utah counties…

  • PM2.5 Area Designations: State Implementation Plan Development

    Understand PM2.5 area designations planning and how that shapes Utah’s air quality policies. Nonattainment designation is determined by the EPA when an area or areas within a state persistently exceed the National Ambient Air Quality Standards. The EPA has designated “nonattainment areas” for Particulate Matter having an aerodynamic diameter of 2.5 microns (μm) or less…

  • Public Comment: PM2.5 State Implementation Plan Development

    See how public input helps shape Utah’s PM2.5 air quality plans and ensures transparency in the process. Public comments are a critical part of the decision making process. The Department of Environmental Quality and its divisions and boards are committed to using the public notice and comment process to improve the decisions they make. The…

  • Area Source Rules for PM2.5 Moderate SIP

    Explore the area source rules for PM2.5 that target smaller pollution sources—like homes and businesses—critical to PM2.5 reductions. The following rules were adopted as part of the overall emissions control strategy for the PM2.5 SIPs. The rules themselves can be accessed online.

  • PM2.5 Air Trend Plots

    PM2.5 air trend plots show PM2.5 pollution level tracking over time in graph format. PM2.5 data has been collected at most monitoring stations since 2000. Like PM10, maximum values also tend to occur during wintertime inversions. Also like PM10, trends are somewhat difficult to evaluate because weather plays such a large role in the data…

  • Serious Area PM2.5 State Implementation Plan (SIP) Development (2017-2019)

    The Serious PM2.5 SIP Development is very much an iterative process. The technical foundation of any SIP involves numerous emissions inventories, air quality modeling assumptions, potential emission controls, and ever-fluctuating design values recorded throughout the air monitoring network. The PM2.5 Implementation Rule is very prescriptive about how these numbers must fit together to comprise an…

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