Mercer County
 
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
 
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)
51 
Moderate
Health Message: Unusually sensitive people should consider reducing prolonged or heavy exertion outdoors.
Air Quality Index (AQI)
46 
Good
Health Message: None
AQI - Pollutant Details
Ozone
51 
Moderate
Ozone
46 
Good
Forecast Discussion: Brisk west to northwest flow is keeping ozone levels down in the good range in spite of a good deal of sunshine this Friday afternoon. A weak disturbance may result in a shower or thundershower later on tonight into Saturday morning, otherwise partly to mostly sunny Saturday with plenty of mixing and ventilation to keep ozone down into the good range once more. The best chance for moderate ozone will come on Sunday with warmer and more humid air, as well as winds shifting into the southwest. A cold front then moves through during the day Monday, bringing showers and a thunderstorm with the clouds keeping ozone in check. Cooler and drier air in the middle of next week will act to keep air quality good.---McAuliffe

Current Conditions
Air Quality Index (AQI)
observed at 19:00 EDT
34
Good
Health Message: None
AQI - Pollutant Details
Ozone 34 Good
Particles (PM2.5) 33 Good

Past Air Quality Maps and Data
Yesterday's Maps and Data
Air Quality Maps Archives (by region)