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DEP Issues Code Orange Air Quality Action Day for Ozone for Friday, July 16, 2021, in Southeastern Counties


Harrisburg, PA – The Pennsylvania Department of Environmental Protection (DEP) has issued a Code Orange Air Quality Action Day for ozone for Friday, July 16, 2021, in the southeastern counties of Bucks, Chester, Delaware, Montgomery, and Philadelphia.

A combination of mostly sunny skies, light southwesterly winds, and high temperatures in the low 90s will likely contribute to 8-hour average concentrations of ozone in the Code Orange range on Friday.

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 issued 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 air pollution by: 

Driving less by carpooling or using public transportation; 
Combining errands to reduce vehicle trips; 
Limiting engine idling; 
Refueling cars and trucks after dusk; and 
Conserving electricity by setting air conditioning to a higher temperature and turning off lights that are not in use.

For more information, visit DEP at, EPA’s AirNow at, or Delaware Valley Regional Planning Commission’s Air Quality Partnership at

MEDIA CONTACT: Jamar Thrasher,, 717-319-1758

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