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)
70 
Moderate
Health Message: Unusually sensitive people should consider reducing prolonged or heavy exertion outdoors.
Air Quality Index (AQI)
67 
Moderate
Health Message: Unusually sensitive people should consider reducing prolonged or heavy exertion outdoors.
AQI - Pollutant Details
Ozone
70 
Moderate
Particles (PM2.5)
54 
Moderate
Ozone
67 
Moderate
Particles (PM2.5)
44 
Good
Forecast Discussion: Thunderstorms have arrived several hours earlier than expected on Thursday afternoon. Although ozone levels rose very quickly this morning and early afternoon, the arrival of the storms will be shutting off ozone production through the rest of the afternoon. As a result, there is no longer a concern that daily ozone will reach the Code Orange range on Thursday. **Friday's Forecast: Friday will be a wet and mostly cloudy end to the work week for the Delaware Valley, with drenching rain in the morning, and possible scattered thunderstorms during the afternoon. The NWS has placed the Philadelphia metropolitan area under a Flash Flood Watch through Friday evening due to the intense precipitation expected across the area. A period of clearing in the afternoon will allow ozone to rise into the Moderate range. Particles will drop down into the Good range due to atmospheric cleansing due to the heavy morning rain. **Extended Forecast: It will be a gloomy but cooler weekend for the Philadelphia metropolitan weekend, with the chance of showers and thunderstorms throughout most of Saturday and Sunday. The recent extended heat wave will finally end on Saturday as temperatures drop to more seasonable values. On Saturday, afternoon precipitation and clouds will keep ozone in the Good range. Particles will rise to the Good/Moderate threshold due to calm winds and very humid conditions. Another round of clouds and precipitation is expected on Sunday, which, combined with persistent onshore (easterly) winds, will limit both ozone and particles to the Good range. -Brown/Huff

Current Conditions
Air Quality Index (AQI)
observed at 21:00 EDT
50
Good
Health Message: None
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 50 Good
Particles (PM2.5) 43 Good

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