Skip to main content

Trees, parks & the environment

Air quality

The Department of Public Health provides real-time daily updates and other resources about the air quality in Philadelphia.

The air quality readings on this page use the U.S. Air Quality Index (AQI). These categories were created by the U.S. Environmental Protection Agency. Learn more about the AQI.

Read on for the current air quality, or jump to:


Current conditions in Philadelphia

AQI basics for ozone and particle pollution


Good — 0 to 50

Air quality is satisfactory, and air pollution poses little or no risk.


Moderate — 51 to 100

Air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution.


Unhealthy for Sensitive Groups — 101 to 150

Members of sensitive groups may experience health effects. The general public is less likely to be affected.


Unhealthy — 151 to 200

Some members of the general public may experience health effects. Members of sensitive groups may experience more serious health effects.


Very Unhealthy — 201 to 300

Health alert: The risk of health effects is increased for everyone.


Hazardous — 301 to 500

Health warning of emergency conditions: everyone is more likely to be affected.

Interactive map of air monitoring stations

This map shows the locations of the City’s air monitoring stations. Click on a station to display the latest available hourly concentration of the pollutants measured there.

Other air quality resources

Select neighborhood air quality averages

The Department of Public Health is working to make it easier for residents to find information about average air quality in Philadelphia neighborhoods. Learn more about the current neighborhoods of interest.

Historical air pollution data

You can find historical air pollution data for Philadelphia and the rest of the country at Air Data: Air Quality Data Collected at Outdoor Monitors Across the United States.