Lehigh Valley
 
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
Air Quality Forecast
Today's High Tomorrow's High
Air Quality Index (AQI)
35 
Good
Health Message: None
Air Quality Index (AQI)
35 
Good
Health Message: None
AQI - Pollutant Details
Particles (PM2.5)
35 
Good
Particles (PM2.5)
35 
Good
Forecast Discussion: Current Conditions: As of 2 PM on Thursday, mostly sunny skies prevail over the region as a cold front continues to move through eastern PA. At the same time, an area of high pressure builds in over the Plains. This high pressure system along with the approaching front is helping to steer our winds out of the west today. The westerly winds, which is rather strong today, are helping to keep the boundary layer well mixed and forcing PM 2.5 levels to hover near the good / moderate threshold. Expect better air quality to persist tomorrow as another cold, dry air builds back in. *** Friday's Forecast: So for Friday, expect cloudy skies to persist through the day as the area of high pressure, which was over the Plains on Thursday, gradually shifts east through the Ohio Valley region. The clockwise circulation around the high will keep our winds out of the west, northwest during the day. As a result, cold and dry air will build southward into western PA. Afternoon highs will only reach into the low 30s. The combination of the cold, dry air along with the moderate wind flow will help keep PM 2.5 levels within the good range. *** Extended Outlook: Over the coming days, expect to see some moderation in the temperatures early in the period as the cold air temporarily retreats into Canada. The main driver of this pattern change will be the area of high pressure approaching the region on Friday. This high will continue to move east so that by the end of the weekend, it is sitting out in the western Atlantic. The return flow along the backside of the high will allow warmer, more humid air to return to the region. The warmer air will also promote a rise in PM 2.5 levels over the area. The only limiting factor to high PM 2.5 rises will be the moderate winds over the region. Expect levels to reach toward the good / moderate threshold during this period. At the same time, a storm system will begin to take shape over the Mississippi River valley. This system will move east and will likely impact our area in the Monday time frame (with rain). The system will eventually drag a cold front through our area on Tuesday. Once the front moves in, cold and dry air will once again infiltrate eastern PA, forcing air quality levels to drop back into the good range. --Nolan

Current Conditions
Air Quality Index (AQI)
observed at 20:00 EST
54
Moderate
Health Message: Unusually sensitive people should consider reducing prolonged or heavy exertion.
AQI - Pollutant Details
Particles (PM2.5) 54 Moderate
Ozone 19 Good

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