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
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

AirNow.gov 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
Particles (PM2.5)
Data Not Available
Forecast Discussion: Current Conditions: As of 2 PM on Tuesday, mostly cloudy skies prevail over the region as a storm system rotates over the northern Great Lakes. At the same time, a storm system is continuing to take shape off the Georgia coastline. It is this storm system that will make its way up the East Coast and impact our weather come Thursday. Right now, strong westerly flow is keeping temperatures in the mid 40s and air quality in the good range. Expect the good air quality to continue into tomorrow as even colder air moves in. *** Wednesday's Forecast: So for Wednesday, overcast skies will persist for much of the day as the storm system, with origins over the southeastern US, begins to make its way into the Mid-Atlantic. The precipitation shield associated with this system is likely to trigger some light snow over portions of area during the day. It will definitely be cold enough as northerly flow keeps temperatures near the freezing mark. The combination of the cold air and the storm system off to our east will likely keep air quality within the good range. *** Extended Outlook: Over the coming days, expect temperatures to remain cool early on thanks to an area of high pressure building in over the Plains. As we move toward the weekend, this high pressure system will migrate east. The high will be over the Mid-Atlantic by Saturday and will move out to sea early next week. As a result, expect the clockwise flow around the high to steer our winds out of the south, allowing warmer temperatures to build in late Saturday into early Monday. This warm-up will be short-lived, however, thanks to a cold front dropping from north to south across Pennsylvania during the day on Monday. By Tuesday, a new area of high pressure will settle in over the Northeastern US, keeping us cool and dry. The high will be quick to move off shore on Wednesday, allowing warmer air to return for the second half of the week. This constant state of flux, where the air mass is changing every day or so, is not very conducive for high PM 2.5 levels. Therefore, expect PM 2.5 levels to stay primarily in the good range, with just peaks into the moderate level when the warmer air moves back into the region. --Nolan

Current Conditions
Data Not Available

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

E-Mail Notification