Philadelphia
 
Data and Forecasts courtesy of:
 

 
AQI: Good (0 - 50) AQI: Good (0 - 50)
Air quality is considered satisfactory, and air pollution poses little or no risk.
AQI: Moderate (51 - 100) AQI: Moderate (51 - 100)
Air quality is acceptable; however, for some pollutants there may be a moderate health concern for a very small number of people who are unusually sensitive to air pollution.
AQI: Unhealthy for Sensitive Groups (101 - 150) AQI: Unhealthy for Sensitive Groups (101 - 150)
Although general public is not likely to be affected at this AQI range, people with lung disease, older adults and children are at a greater risk from exposure to ozone, whereas persons with heart and lung disease, older adults and children are at greater risk from the presence of particles in the air.
AQI: Unhealthy (151 - 200) AQI: Unhealthy (151 - 200)
Everyone may begin to experience health effects members of sensitive groups may experience more serious health effects.
 AQI:Very Unhealthy (201 - 300) AQI: Very Unhealthy (201 - 300)
Health alert: everyone may experience more serious health effects.
AQI: Hazardous(301 - 500) AQI: Hazardous (301 - 500)
Health warnings of emergency conditions. The entire population is more likely to be affected.
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
 
Data and Forecasts courtesy of:
Air Quality Forecast
Today Tomorrow
Air Quality Index (AQI)
90 
Moderate
Health Message: Unusually sensitive people should consider reducing prolonged or heavy exertion outdoors.
Air Quality Index (AQI)
50 
Good
Health Message: None
AQI - Pollutant Details
Ozone
90 
Moderate
Particles (PM2.5)
55 
Moderate
Ozone
50 
Good
Particles (PM2.5)
50 
Good
Forecast Discussion: A weak cold front draped over the Philadelphia metropolitan area on Wednesday afternoon will slowly move northward as a warm front on Thursday morning. As the front moves northward, calm winds in the morning will give way to light southerly winds in the afternoon. With the frontal boundary nearby, there is a chance of afternoon showers and thunderstorms. Mostly sunny skies and seasonable temperatures will promote mid-to-upper Moderate ozone. If there are more afternoon showers than expected, then ozone will be lower in the Moderate range. Particles will remain in the Moderate range due to morning stagnation associated with the frontal boundary. **Extended Forecast: A cold front will approach from the west on Friday. It will be showery all day, with thunderstorms in the afternoon. Ozone and particles will drop into the Good range. Skies will clear gradually on Saturday in the wake of the frontal passage. Good air quality will continue. -Huff

Current Conditions
Air Quality Index (AQI)
observed at 3:00 EDT
45
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 21 Good
Particles (PM2.5) 45 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