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Hazardous Air Pollutants

  • Hazardous Air Pollutants

    Hazardous air pollutants are those known to cause cancer and other serious health impacts.  The Clean Air Act requires the EPA to regulate hazardous air pollutants, also known as air toxics, from categories of industrial facilities in two phases.

  • About Hazardous Air Pollutants

    Hazardous air pollutants come from a variety of sources and have a wide range of health effects and environmental impacts. 

    Learn more about hazardous air pollutants
  • Urban Air Toxics

    Reducing emissions of urban air toxics has been a priority for EPA since the passage of the Clean Air Act Amendments in 1990. 

    Learn more about the Urban Air Toxics Program
  • Hazardous Air Pollutant Data

    EPA uses hazardous air pollutant emissions and ambient monitoring data to develop regulatory programs that limit emissions from stationary sources. 

    Access hazardous air pollutant data and learn about emissions controls

Related Information

  • Clean Air Act
  • Stationary Sources of Air Pollution
  • Criteria Air Pollutants
  • Permitting Under the Clean Air Act
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Last updated on April 21, 2025
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