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)
67 
Moderate
Health Message: Unusually sensitive people should consider reducing prolonged or heavy exertion outdoors.
Air Quality Index (AQI)
58 
Moderate
Health Message: Unusually sensitive people should consider reducing prolonged or heavy exertion outdoors.
AQI - Pollutant Details
Ozone
67 
Moderate
Particles (PM2.5)
55 
Moderate
Ozone
58 
Moderate
Particles (PM2.5)
42 
Good
Forecast Discussion: With weather more reminiscent of July than early September, it will be a hot and humid return to work on Tuesday after the holiday weekend. Mostly sunny skies will give way to increasing clouds in the late afternoon and evening as a weak cold front approaches from the west. Very light to calm southwesterly winds in the morning will pick up in the afternoon ahead of the advancing front. With plenty of afternoon sun, ozone will rise into the Moderate range; clean regional conditions and stronger afternoon winds will limit ozone to the mid-Moderate range, despite high temperatures in the low 90s °F. Particles will remain in the Moderate range as well, due to stagnant conditions in the morning and high atmospheric humidity, which favors particle formation. **Extended Forecast: Scattered thunderstorms overnight ahead of the front will help to clean out the atmosphere. The air mass that will arrive behind the front on Wednesday will be less humid but not much cooler, and above average temperatures will continue for the rest of the week. As a result, particles will return to the Good range on Wednesday, but ozone will reach the low Moderate range. On Thursday, surface winds will stagnate as the center of surface high pressure moves overhead. Ozone and particles will rebound, with ozone reaching the upper Moderate range and particles climbing back into the low Moderate range. -Huff

Current Conditions
Air Quality Index (AQI)
observed at 9:00 EDT
48
Good
Health Message: None
AQI - Pollutant Details
Particles (PM2.5) 48 Good
Ozone 11 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