Philadelphia
 
Data courtesy of:
 

 
AQI: Good (0 - 50) AQI: Moderate (51 - 100) AQI: Unhealthy for Sensitive Groups (101 - 150) AQI: Unhealthy (151 - 200) AQI: Very Unhealthy (201 - 300) AQI: Hazardous(301 - 500) Action DayAction Day
 
Local Air Quality Resources
Current Air Quality Index | Forecast | Ozone Action Program
 
State Air Quality Resources
Air Quality Partnership of Lehigh Valley - Berks
Air Quality Partnership of the Delaware Valley
Air Quality Partnership of the Susquehanna Valley
American Lung Association (ALA) of Pennsylvania
PA Allergy & Asthma Association
Pennsylvania DEP - BAQ - Contacts
Pennsylvania DEP - BAQ - Current Air Quality Index (AQI) by Area
Pennsylvania DEP - Bureau of Air Quality (BAQ)
Pennsylvania DEP – Air Quality Forecast Home Page
Pennsylvania DEP – Home Page
Southwest PA Air Quality Partnership
Air Quality Forecast
Today's High Tomorrow's High
Air Quality Index (AQI)
54 
Moderate
Health Message: Unusually sensitive people should consider reducing prolonged or heavy exertion outdoors.
Air Quality Index (AQI)
64 
Moderate
Health Message: Unusually sensitive people should consider reducing prolonged or heavy exertion outdoors.
AQI - Pollutant Details
Ozone
54 
Moderate
Particles (PM2.5)
42 
Good
Ozone
64 
Moderate
Particles (PM2.5)
53 
Moderate
Forecast Discussion: High pressure will build in on Friday, promoting sunny skies and light winds. The arrival of a dry and seasonably cool air mass will keep temperatures and dew points at comfortable levels. Particle concentrations will be limited to the Good range. An afternoon sea breeze, light to variable surface winds, and full afternoon sun will be enough to bring ozone just into the Moderate range. **Extended Forecast: A warm front will travel northward and pass through the Philadelphia metropolitan area on Saturday, triggering scattered clouds and a slight chance for late afternoon rain showers. Temperatures and humidity will rise with the passage of the warm front. Winds will pick up in the afternoon, but early morning stagnation, partly sunny skies, and recirculation of air aloft will allow air quality to rise into the Moderate range. A cold front will approach from the west on Sunday and will result in scattered precipitation and mostly cloudy skies. Ozone will be reduced to the Good range, while particles will remain in the Moderate range due to westerly flow aloft and increased levels of atmospheric moisture. -Catena/Huff/Herdt

Current Conditions
Air Quality Index (AQI)
observed at 11:00 EDT
55
Moderate
Health Message: Unusually sensitive people should consider reducing prolonged or heavy exertion.
AQI - Pollutant Details
Particles (PM2.5) 55 Moderate
Ozone 23 Good

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