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
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)
39 
Good
Health Message: None
Air Quality Index (AQI)
45 
Good
Health Message: None
AQI - Pollutant Details
Ozone
39 
Good
Particles (PM2.5)
38 
Good
Ozone
45 
Good
Particles (PM2.5)
40 
Good
Forecast Discussion: The Weekend Forecast: On Saturday, mostly sunny skies will persist for much of the day as the area of high pressure, which was over the northern Great Lakes on Friday, shifts into the eastern Great Lakes region. As a result, expect our winds to remain light during the day, while remaining out of the northwest for much of the day. With abundant sunshine during the day, afternoon highs should still peak near the 70 degree mark. The combination of the slightly cooler than normal temperatures and the low dewpoints (temperatures will be in the 40s) will likely keep ozone and PM 2.5 levels from rising out of the good threshold. *** For Sunday, partly sunny skies will prevail over the region as the high pressure system, which was just off to our north and west on Saturday, moves in over the northern Mid-Atlantic. The presence of the high just to our east will allow our winds to shift out of the south during the afternoon. As a result, warmer temperatures will build into the region. In fact, afternoon temperatures are likely to peak in the upper 70s. The increasing warmth along with the sunshine should allow ozone to rise into the low moderate range. The increasing humidity levels will force PM 2.5 levels to rise into the moderate category as well. *** On Memorial Day, expect the skies to turn mostly cloudy as the area of high pressure, which was slightly off to our east on Sunday, continues to track eastward into the Atlantic. At the same time, a frontal system will approach the region from the west. The approaching frontal system will keep our flow out of the south, resulting in afternoon temperatures peaking near 80. The combination of the warm and moist conditions could not trigger an afternoon shower but is also likely to keep PM 2.5 elevated in the moderate range. Ozone will drop back to the good range due to the cloud cover. *** For Tuesday, mostly cloudy conditions will continue to persist over the region as the focal point of showers remains centered over our area and point to our west. These showers are setting up along the western periphery of the area of high pressure that pushed through our region over the weekend (and is now stationed in the Atlantic). The clockwise rotation around this high will keep our winds out of the south, resulting in afternoon temperatures in the low 80s. However, there will continue to be a threat a rain, especially during the afternoon. As a result, ozone will remain in the good range while PM 2.5 thrives in the low moderate category. *** Extended Outlook: As we take a peek into next week, we notice that the week will start off on the seasonably warm side as an area of high pressure controls our weather. After the high moves offshore and our winds turn southerly, the afternoon temperatures will extend above normal. However, this southerly flow will also tap into some moisture, resulting in more cloud cover and an increased chance of rain. These rain chances will continue to persist for the beginning half of the work week until a cold front is able to clear the region on Thursday. After that front moves through, a ridge of high pressure will try to become reestablished along the East Coast just as we head into the weekend. Overall, air quality levels are expected to remain within the moderate range during the period, primarily due to PM 2.5. Once the ridge becomes reestablished toward the latter half of the week, both ozone and PM 2.5 could reside in the moderate range, depending on how much cloud cover we see. --Nolan

Current Conditions
Air Quality Index (AQI)
observed at 16:00 EDT
57
Moderate
Health Message: Unusually sensitive people should consider reducing prolonged or heavy exertion.
AQI - Pollutant Details
Particles (PM2.5) 57 Moderate
Ozone 43 Good

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