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
ACHD website | Air Quality Action Day Program | Forecast | PADEP website
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)
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 an area of low pressure drops southeastward across the Commonwealth. Currently, much of the rain associated with this system has moved off to our east. Strong southwesterly winds have developed over the region, forcing temperatures close to 60. It is the strong winds though that are keeping the boundary layer well mixed and PM 2.5 levels in the good threshold. As cooler air builds in briefly tomorrow, expect one more day of good air quality. *** Wednesday's Forecast: So for Wednesday, mostly sunny skies will persist across western PA as the storm system, which moved through PA on Tuesday, continues to push off to our east. At the same time, a new area of high pressure will build in over the Northeastern US. This high pressure system will allow for the skies to clear and the winds to die down (near the surface) as they turn more out of the west. Temperatures should remain near normal with highs hovering in the low to mid 50s. The seasonable temperatures will allow PM 2.5 levels to rise. However, it is the dry air and the overall strong flow in the boundary layer that will keep PM 2.5 levels within the upper good range. *** Extended Outlook: Over the coming days, expect temperatures to climb early in the period as high pressure moves east and returns the flow out of the south. At the same time, a new cold front will begin to advance through the Midwestern US. This frontal system is slated to push into the Ohio Valley later on Thursday and through western PA on Friday into Saturday. As the front comes into contact with the warm and moist conditions over the region, expect rain to push into the region. The rain is likely to be heavy at times as the front moves east. Once the front moves through and a new area of high pressure builds in, cooler and drier conditions will build into the region. Temperatures will again be on the increase in the Monday / Tuesday time frame as high pressure pushes east and the flow turns more westerly. Overall, air quality levels are expected to follow the trend of temperatures during the period. The warm conditions on Thursday are likely to drive PM 2.5 levels into the low moderate range. Once the rain moves in on Friday, PM 2.5 concentrations are likely to fall back into the good range. These conditions will continue through the Easter weekend. Once the high pressure system moves over the Mid-Atlantic early next week and allow temperatures to rebound, PM 2.5 levels are expected to bump back into the moderate category. --Nolan

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