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 is undergoing maintenance. Updates for the forecasts and current conditions are not available between midnight and 4 am EST.

Air Quality Forecast
Today's High Tomorrow's High
Air Quality Index (AQI)
Health Message: None
Data Not Available
AQI - Pollutant Details
Data Not Available
Forecast Discussion: Current Conditions: As of 2 PM on Wednesday, mostly cloudy skies prevail across the region as the showers that pushed through earlier this morning continue to move well off to our east. Right now, southwesterly flow is helping to keep dewpoints elevated in the 50s and temperatures in the mid 70s. The stronger winds today has created enough mixing within the boundary layer coupled with the cloud cover has limited ozone concentrations to the good range. Expect good air quality to persist into tomorrow as more rain moves in over the area. *** Thursday's Forecast: So for Thursday, mostly cloudy skies early will give way to partly cloudy skies late as a frontal system makes its way through the region. This front is likely to trigger some showers early on before passing through the region. On the backside of the front, slightly cooler and drier air will build in. In fact, afternoon highs will peak in the 70s. The combination of the near normal highs, the winds swinging out of the north during the afternoon and the day long cloud cover will limit ozone formation to the good range as well. --Nolan

Current Conditions
Data Not Available

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