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DEP Declares Code Orange Air Quality Action Day for Fine Particulate Matter for Wednesday, March 22, 2023, in the Liberty-Clairton Area of Allegheny County


 MEDIA CONTACT: Jamar Thrasher,

Harrisburg, PA – The Pennsylvania Department of Environmental Protection (DEP) has declared a Code Orange Air Quality Action Day for fine particulate matter for Wednesday, March 22, 2023, in the Liberty-Clairton Area of Allegheny County, which includes Clairton City, Glassport Borough, Liberty Borough, Lincoln Borough, and Port Vue Borough.


A temperature inversion in the morning and light winds will likely contribute to daily average concentrations of fine particulate matter in the Code Orange range on Wednesday.


The U.S. Environmental Protection Agency's (EPA) Air Quality Index (AQI) provides standardized color codes for forecasting and reporting daily air quality. Green signifies good air quality; Yellow means moderate air quality; Orange represents unhealthy pollution levels for sensitive groups of people; and Red warns of unhealthy pollution levels for all.


An Air Quality Action Day is declared when the AQI is forecasted to be Code Orange or higher. On an Air Quality Action Day, young children, the elderly, and those with respiratory problems, such as asthma, emphysema, and bronchitis, are especially vulnerable to the effects of air pollution and should limit outdoor activities.


Residents and businesses within the Air Quality Action Day area are strongly encouraged to voluntarily help reduce fine particulate matter air pollution by:


  • Reducing or eliminating fireplace and wood stove use;
  • Avoiding the open burning of leaves, trash, and other materials; and
  • Avoiding the use of gas-powered lawn and garden equipment.


For more information, visit DEP at, EPA's AirNow at, Allegheny County Health Department at, or Southwestern Pennsylvania Air Quality Partnership at


For more information on the Pennsylvania Department of Environmental Protection, please visit the website or follow DEP on Facebook, Twitter, or LinkedIn.



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