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 19:00 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 43 Good
Particles (PM2.5) 41 Good
Air Quality Forecast
Today Tomorrow
Air Quality Index (AQI)
44
Good
Health Message: None
Air Quality Index (AQI)
50
Good
Health Message: None
AQI - Pollutant Details
Ozone
40
Good
Particles (PM2.5)
44
Good
Ozone
49
Good
Particles (PM2.5)
50
Good
Forecast Discussion: The first weekend of Fall 2017 will feel more like mid-Summer. A strong area of high pressure centered to the west and north of the forecast area will keep skies sunny and surface winds light. Temperatures will climb into the upper 80s °F on Saturday and Sunday before reaching the low 90s °F on Monday. Although comfortable humidity will continue on Saturday, Sunday and Monday will be hot and humid. Post-tropical cyclone Jose has kept clean air flowing into the Delaware Valley for the past several days, and this pattern will persist on Saturday. Therefore, despite the summer-like weather, both ozone and particles will be limited to the upper Good range. As Jose’s influence wanes on Sunday and high pressure builds eastward, surface winds will decrease. Light and converging winds are possible along I-95 in the afternoon, which will help pollutants to accumulate. Air quality will move into the Moderate range; ozone has the potential to quickly climb up into the mid-to-upper Moderate range. Monday will likely be the hottest day of the week, but winds aloft and at the surface will shift back to the northeast (clean) in the afternoon. This cleaner flow pattern should limit rising ozone to the upper Moderate range, despite ample sunshine and weekday emissions. Particles will remain in the Moderate range as well due to humid conditions. **Extended Forecast: Tuesday will be a bit cooler than Monday, but still much warmer than average. Strong easterly flow aloft will bring clean maritime air into the forecast area, for a return to Good air quality. -Huff
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E-Mail Notification
 
Pennsylvania Air Quality Partnership Email