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 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)
40 
Good
Health Message: None
Air Quality Index (AQI)
60 
Moderate
Health Message: Unusually sensitive people should consider reducing prolonged or heavy exertion.
AQI - Pollutant Details
Particles (PM2.5)
40 
Good
Particles (PM2.5)
60 
Moderate
Forecast Discussion: Current Conditions: As of 2 PM on Friday, mostly sunny skies prevail over the region as an area of high pressure continues to dominate the weather across the Mid-Atlantic states. Right now, light winds coupled with warm temperatures have allowed PM 2.5 (and ozone) to extend well into the moderate range. Expect the air quality to fall over the weekend thanks to the passage of a cold front early in the process. Air quality levels will likely rebound early next week as warmer temperatures return. Here are the day-to-day details... *** On Saturday, partly cloudy skies will persist during the morning hours as a cold front advances southward across the Commonwealth. By the afternoon, the front will be off to our south. A new area of high pressure building in north of the Great Lakes will steer our flow out of the north. The northerly flow will, in turn, force cooler, drier conditions southward across western PA. As a result, afternoon temperatures will only peak in the 70s. The combination of the cool and dry conditions will keep PM 2.5 levels within the good threshold. *** For Sunday, expect the skies to turn mostly sunny as the area of high pressure, which was near the Great Lakes region on Saturday, begins to drop south and east. For much of the day, the winds will stay out of the northerly direction, continuing to deliver the cleaner, cooler, and drier Canadian air mass to the region. In fact, high temperatures should stay in the low to mid 70s. The combination of the seasonable temperatures and drier air will be enough to hold PM 2.5 concentrations to the good threshold. *** On Monday, mostly sunny skies in the morning should give way to partly cloudy skies in the afternoon as the high pressure system, which was off to our north on Sunday, continues its southeastward progression and moves into the western Atlantic. At the same time, a new cold front will begin to move east from the Great Lakes / Ohio Valley region. This front is likely to trigger some shower development late in the day. Overall, with winds turning more southwesterly on the backside of the high and in advance of the front, expect warmer, more humid conditions to build in. So as temperatures rise closer to the 80 degree mark, expect PM 2.5 levels to creep up into the low moderate range. *** Extended Outlook: As we take a peek into next week, we notice that the week will start off with dry conditions over the region. Temperatures will be warming through the 70s for the first two days of the week as we await our next cold front passage. This frontal passage will occur overnight Monday into Tuesday morning. As the front moves off to our east, expect a round of showers to persist. Once the front clears the region, a new area of high pressure will become established over the Midwestern US. The clockwise circulation around the high will initially deliver an even cooler and drier air mass than what arrived over the past weekend. Expect good air quality to persist. During the second half of the week, the high will move east and over the Mid-Atlantic. Expect seasonable temperatures to prevail. With the high pressure projected to remain in place through the weekend, expect PM 2.5 levels to slowly increase each day, potentially returning to the moderate range at some point. --Nolan

Current Conditions
Air Quality Index (AQI)
observed at 18:00 EDT
74
Moderate
Health Message: Unusually sensitive people should consider reducing prolonged or heavy exertion outdoors.
Note: Values above 500 are considered Beyond the AQI. Follow recommendations for the Hazardous category. Additional information on reducing exposure to extremely high levels of particle pollution is available here.
AQI - Pollutant Details
Ozone 74 Moderate
Particles (PM2.5) 48 Good

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