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:
Current Conditions
Air Quality Index (AQI)
observed at 1:00 EDT
43
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 24 Good
Particles (PM2.5) 43 Good
Air Quality Forecast
Today Tomorrow
Air Quality Index (AQI)
46
Good
Health Message: None
Air Quality Index (AQI)
61
Moderate
Health Message: Unusually sensitive people should consider reducing prolonged or heavy exertion outdoors.
AQI - Pollutant Details
Ozone
46
Good
Particles (PM2.5)
46
Good
Ozone
61
Moderate
Particles (PM2.5)
35
Good
Forecast Discussion: It will be a very warm and humid first weekend of summer for the Delaware Valley. Nearby low pressure will pinch a warm front and a cold front around the forecast area on Saturday, promoting scattered showers and thunderstorms throughout the day. Mostly cloudy skies and periods of heavy rain will limit ozone and particles to the Good range. Oppressive conditions will continue on Sunday as temperatures rise to near 90 °F in a very humid air mass. Another, stronger cold front approaching the forecast area from the north will result in increasing clouds in the afternoon, with a chance for thunderstorms. The southward push of this front, along with its associated precipitation and cloud cover, are still in question. If the front remains to the north as expected, periods of sunshine and above average temperatures will allow ozone to rise into the Moderate range. If afternoon thunderstorms arrive earlier or are more widespread than anticipated, ozone may remain in the Good range. Particles will rise into the Moderate range in an increasingly humid air mass. Sunday’s cold front will push southward on Monday, allowing a cooler, much less humid, and clean air mass to filter into the Delaware Valley. Ozone and particles will recede to the Good range. **Extended Forecast: The center of high pressure will move over the forecast area on Tuesday, promoting mostly sunny skies and seasonable temperatures, with persistent comfortable humidity. It will be a beautiful summer day! Although the air mass in place should be clean, essentially calm surface winds and a long day of full June sunshine will allow ozone to creep into the Moderate range. Particles will remain in the Good range due to lower humidity. -Enlow/Huff
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