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
Air Quality Forecast
Today's High Tomorrow's High
Air Quality Index (AQI)
67 
Moderate
Health Message: Unusually sensitive people should consider reducing prolonged or heavy exertion outdoors.
Air Quality Index (AQI)
90 
Moderate
Health Message: Unusually sensitive people should consider reducing prolonged or heavy exertion outdoors.
AQI - Pollutant Details
Ozone
67 
Moderate
Particles (PM2.5)
53 
Moderate
Ozone
90 
Moderate
Particles (PM2.5)
46 
Good
Forecast Discussion: A weak cold front will move through the Philadelphia metropolitan area in the afternoon. Southerly flow ahead of the front will pump hot and humid air into the area, making Friday a sweltering end to the work week. Surface winds will shift northwesterly around lunchtime, which will help to temper ozone formation in the afternoon, despite the hot and mostly sunny conditions, for daily ozone in the mid-Moderate range. Particles have been hovering around the Good/Moderate threshold for the past several days, and the humid conditions on Friday should bump up daily average concentrations to the low Moderate range. **Extended Forecast: The front will remain south of the forecast area on Saturday. The main effect of the frontal passage will be to briefly lower humidity, so while Saturday will still be above average in terms of temperature, it will feel more comfortable than Friday. The new air mass should be relatively clean, but light and converging surface winds under full sun will allow ozone to climb up higher into the Moderate range, mainly at locations along I-95. Particles will drop down into the Good range in response to lower humidity. Sunday will be very warm and sunny with increasing humidity. A shift to onshore flow aloft will push ozone lower into the Moderate range and particles slightly lower into the Good range. -Huff

Current Conditions
Air Quality Index (AQI)
observed at 13:00 EDT
54
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 44 Good
Particles (PM2.5) 54 Moderate

Past Air Quality Maps and Data
Yesterday's Maps and Data
Air Quality Maps Archives (by region)

E-Mail Notification
 
Pennsylvania Air Quality Partnership Email