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)
90 
Moderate
Health Message: Unusually sensitive people should consider reducing prolonged or heavy exertion outdoors.
Air Quality Index (AQI)
59 
Moderate
Health Message: Unusually sensitive people should consider reducing prolonged or heavy exertion.
AQI - Pollutant Details
Ozone
90 
Moderate
Particles (PM2.5)
75 
Moderate
Particles (PM2.5)
59 
Moderate
Ozone
47 
Good
Forecast Discussion: The polluted air mass that has been influencing air quality this week has been slow to clean out behind a slow-moving, weak cold front on Friday. By Saturday, sustained onshore (northeasterly) flow both aloft and at the surface should be sufficient to bring clean maritime air into the forecast area. Temperatures will drop as well; it will still be warmer than average for early September, but it will be cooler than it has been all week. Humidity will also gradually decrease, making for a lovely Labor Day holiday weekend. Ozone will return to the Good range on Saturday, while particle concentrations decrease but remain in the Moderate range for another day. On Sunday, surface winds will slacken, allowing ozone to rebound to the low Moderate range under sunny skies. Particles will be in the Good range in response to onshore transport and lower humidity. For Labor Day, a return to warmer and more humid conditions will allow both ozone and particles to reach the Moderate range. **Extended Forecast: Tuesday will be hot and humid, with slight southwesterly winds. Ozone may approach the upper Moderate range, while particles will continue rising higher into the Moderate range as well. -Huff

Current Conditions
Air Quality Index (AQI)
observed at 17:00 EDT
91
Moderate
Health Message: Unusually sensitive people should consider reducing prolonged or heavy exertion.
AQI - Pollutant Details
Particles (PM2.5) 91 Moderate
Ozone 46 Good

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Pennsylvania Air Quality Partnership Email