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 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

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Air Quality Forecast
Today's High Tomorrow's High
Air Quality Index (AQI)
77 
Moderate
Health Message: Unusually sensitive people should consider reducing prolonged or heavy exertion outdoors.
Air Quality Index (AQI)
61 
Moderate
Health Message: Unusually sensitive people should consider reducing prolonged or heavy exertion outdoors.
AQI - Pollutant Details
Ozone
77 
Moderate
Particles (PM2.5)
46 
Good
Ozone
61 
Moderate
Particles (PM2.5)
42 
Good
Forecast Discussion: Temperatures and humidity will take another step up on Thursday as southerly winds bring warmer and more humid air into the Delaware Valley. There is a chance for scattered afternoon showers and thunderstorms, but otherwise skies will be mostly sunny. Ozone will remain in the Moderate range, but not quite as high as on Wednesday, due to the breezy southerly flow. Particles will remain near the Good/Moderate threshold. **Extended Forecast: Friday will be the hottest and most humid day of the week ahead of a weak cold front approaching from the west. Winds will shift northwesterly in the late morning, which will help to temper ozone formation, for a daily average in the lower end of the Moderate range. Particles will drop slightly lower into the Good range. It’s not clear how far south the front will progress on Saturday. At this point, it appears that the front will settle south of the Philadelphia metropolitan area, so Saturday will feature a shift to light onshore (northeasterly) winds and a brief decrease in atmospheric humidity. The clean transport pattern will keep ozone from rising too high into the Moderate range, despite persistent sunny skies and warm conditions, with continued Good particle air quality. -Huff

Current Conditions
Air Quality Index (AQI)
observed at 3:00 EDT
63
Moderate
Health Message: Unusually sensitive people should consider reducing prolonged or heavy exertion.
Note: Values above 500 are considered Beyond the AQI. Follow recommendations for the Hazardous category. Additional information on reducing exposure to extremely high levels of particle pollution is available here.
AQI - Pollutant Details
Ozone 45 Good
Particles (PM2.5) 63 Moderate

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