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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

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Air Quality Forecast
Today's High Tomorrow's High
Air Quality Index (AQI)
Health Message: Unusually sensitive people should consider reducing prolonged or heavy exertion.
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AQI - Pollutant Details
Particles (PM2.5)
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Forecast Discussion: Current Conditions: As of 2 PM on Wednesday, mostly cloudy skies prevail over the region as an area of high pressure continues to build in from the west. Right now, light surface winds persist over the region as temperatures extend into the low 50s. It is the dry air though (dewpoints are in the 20s) that is keeping PM 2.5 levels within the good threshold. Air quality levels will climb tomorrow as even warmer, more humid air mass moves in. *** Thursday's Forecast: So for Thursday, expect mostly sunny skies in the morning to give way to mostly cloudy skies in the afternoon as the area of high pressure, which was over the Northeastern US on Wednesday, slides east and out into the Atlantic. This will allow a warm front to push through, switch our winds out of the south and drive in a warmer air mass into the region. In fact, afternoon highs are expected to peak in the low 70s. The southerly flow will also tap into a moister air mass over the southeastern US. The increase of warmth and moisture over the region will drive PM 2.5 levels back into the low moderate range. *** Extended Outlook: Over the coming days, expect temperatures to fluctuate like they normally do in the Spring as the overall weather pattern remains progressive. Here is how things are shaping up... On Friday, expect more rain to move into the region as a cold front advances in from the west. Once this front moves through (late Friday into early Saturday), colder air will begin to filter in from the north. The driver of this new air mass, an area of high pressure moving in over the Tennessee River valley, will migrate east through the weekend. By early next week, the high will move offshore. The return flow on the backside of the high will drive warmer, more humid air back into the region in the Monday / Tuesday time frame. Even more rain will push into our area as a new cold front advances toward the region during the middle of the week. Overall, air quality levels are likely to follow the trend of temperatures over the period. The warmest period (Monday and Tuesday next week) will likely yield moderate air quality levels. Otherwise, PM 2.5 levels will stay within the upper good range. --Nolan

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