Pittsburgh
 
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)
50 
Good
Health Message: None
Air Quality Index (AQI)
75 
Moderate
Health Message: Unusually sensitive people should consider reducing prolonged or heavy exertion outdoors.
AQI - Pollutant Details
Ozone
50 
Good
Particles (PM2.5)
50 
Good
Ozone
75 
Moderate
Particles (PM2.5)
55 
Moderate
Forecast Discussion: Current Conditions: As of 2 PM on Thursday, mostly sunny skies prevail over the region as high pressure builds in over the Great Lakes. The frontal system that was off to our north yesterday has now dropped southward across the southern Mid-Atlantic region. It is the high to our northwest that is keeping our flow out of the northwest today. As a result, temperatures are only rising into the low 70s. Air quality levels have dropped as well. With temperatures in the 70s and dewpoints in the 50s, ozone and PM 2.5 levels have fallen into the good range. Expect a slight uptick in concentrations tomorrow as temperatures and dewpoints begin to rise. *** Friday's Forecast: So for Friday, mostly sunny skies will continue to persist over the region as the area of high pressure, which was over the Great Lakes on Thursday, shifts east into the Northeastern US. The clockwise flow around the high will ensure that our winds, which were out of the northwest on Thursday, will switch out of the east, southeast by the afternoon. As a result, expect some downsloping (across the Laurel Highlands) to occur. The downsloping will end up warming the air mass, allowing afternoon highs to creep back toward normal (in the low 80s). In addition, dewpoint temperatures will begin to rise toward the 60 degree mark. The combination of these conditions will help ozone to rise near the good / moderate threshold. PM 2.5 will also rise into the upper good range. *** Extended Outlook: Over the coming days, expect seasonably warm air to continue to reside over the region as a series of storm systems move across the Northeastern US. Here is how things are shaping up... Over the weekend, expect the area of high pressure, which was off to our north on Friday, to move out into the Atlantic. At the same time, a new frontal system will move in over the Great Lakes / Ohio Valley region. The departing high and incoming front will steer our winds out of the south. Therefore, expect one really warm day to unfold on Saturday. In fact, under sunny skies, ozone could approach the Code ORANGE range (it has been hard though to get enough emissions over holiday weekend over the last several years to pay dividends in ozone formation). More clouds will move in on Sunday as the frontal system moves into the region. The frontal passage will also trigger some showers over the area. This system will move off to our east just as the next system moves into the Midwestern US. This front is likely to touch off more showers over the area as we approach the middle of the week next week. Overall, in this period of cloud cover and shower chances, expect PM 2.5 to be the dominant pollutant, with levels likely reaching the moderate range for a multi-day period. --Nolan

Current Conditions
Air Quality Index (AQI)
observed at 11:00 EDT
86
Moderate
Health Message: Unusually sensitive people should consider reducing prolonged or heavy exertion.
AQI - Pollutant Details
Particles (PM2.5) 86 Moderate
Ozone 24 Good

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