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 18:00 EDT
60
Moderate
Health Message: Unusually sensitive people should consider reducing prolonged or heavy exertion.
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 58 Moderate
Particles (PM2.5) 60 Moderate
Air Quality Forecast
Today Tomorrow
Air Quality Index (AQI)
60
Moderate
Health Message: Unusually sensitive people should consider reducing prolonged or heavy exertion.
Air Quality Index (AQI)
100
Moderate
Health Message: Unusually sensitive people should consider reducing prolonged or heavy exertion outdoors.
AQI - Pollutant Details
Ozone
60
Moderate
Particles (PM2.5)
60
Moderate
Ozone
100
Moderate
Particles (PM2.5)
65
Moderate
Forecast Discussion: Thursday will be another hot and relatively humid day in the Delaware Valley. Light surface winds and mostly sunny skies will allow ozone to climb to the top of the Moderate range. The main uncertainty in the ozone forecast lies with the smoke originating from the wildfires burning in the western U.S. and Canada. This smoke has reached the forecast area today (Wednesday), and it is pushing particle concentrations into the Moderate range. Currently, the smoke is thick enough that it is reflecting sunlight and therefore, it is not enhancing ozone formation locally. We expect similar conditions on Thursday. The presence of the optically thick smoke, along with increasing clouds in the afternoon and a switch to southwesterly flow aloft (cleaner), are expected to prevent ozone from rising higher than the Moderate range. If the smoke is more dilute, or surface winds are lighter, then Code Orange (Unhealthy for Sensitive Groups or USG) ozone is possible at locations along I-95. Sensitive individuals should monitor air quality conditions closely on Thursday afternoon. Particles will climb higher in the Moderate range on Thursday as transport of wildfire smoke continues. **Extended Forecast: Friday will be the last hot day this week before temperatures return to around average for the weekend. Increasing clouds, breezy surface winds, and afternoon thunderstorms will drop ozone and particles lower in the Moderate range. A cold front will move through the forecast area on Saturday morning. The arrival of a new air mass on breezy northwesterly winds will return ozone and particles to the Good range. -Huff
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