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)
30 
Good
Health Message: None
Air Quality Index (AQI)
40 
Good
Health Message: None
AQI - Pollutant Details
Particles (PM2.5)
30 
Good
Particles (PM2.5)
40 
Good
Forecast Discussion: This Weekend's Forecast: On Saturday, mostly cloudy skies will persist as the disturbance that drove the cold front through late Friday, moves well off to our east. Winds will be blowing quite strongly during the day out of the northwest, forcing colder and drier to dive southeastward across the region. As a result, afternoon temperatures should only peak near the 10 degree mark. It is the source of the air mass (from central Canada) along with the strong winds that will limit PM 2.5 formation to the good category. *** For Sunday, expect the skies to turn mostly sunny as a strong area of high pressure continues to build in from the east. The presence of this high will not only allow the sun to return but should also reduce mixing near the surface. As a result, temperatures are not expected to be as low as on Saturday. In fact, readings will rise toward the 20 degree mark. The air mass will still be relatively dry however. The dryness of the air along with the cold temperatures should once again hold PM 2.5 levels within the good threshold. *** On Presidents' Day, the clouds will return to the region as a storm system, which originated off the Pacific Northwest coastline on Friday, dives across the Tennessee River valley. At the same time, the high pressure system that moved over the northeastern US on Sunday, will begin to push off to the east. Precipitation associated with the storm system off to our west will spread eastward into our area before the day ends. When the precipitation moves in, expect there to be enough cold air to support all snow. The combination of the departing high and incoming storm will steer our flow out of the south, which, in turn, will force temperatures back in the low 30s. Overall, it is the incoming storm system that will create enough mixing to force PM 2.5 levels to stay within the good category. *** For Tuesday, cloudy skies will continue to persist as the storm system, that was over the Tennessee River valley on Monday, strengthens as it moves north and east. Across western PA, snow/rain will continue to fall during the day. Temperatures are going to be very close to the freezing mark (in the low to mid 30s). This could be a case where higher elevations benefit because of how cold it will remain in those areas. Overall, it will be the intensity of the precipitation that will drive the PM 2.5 levels and keep readings close to the good / moderate threshold. *** Extended Outlook: As we take a peek into next week, we notice that the week will start off with an arctic air mass entrenched over the area. This air mass will lift out starting on Monday as the overall weather pattern remains progressive. In fact, we will see a storm system move in on Monday into Tuesday. This system will deliver a variety of rain/snow for the region as it tracks off to the north and east. On the backside of the system, conditions will remain cold and dry as a new high pressure system builds in over the upper Midwest. This high will creep east of our area by Friday, leading us to warmer weather as we head into the weekend. Overall, air quality levels will remain low early on as a result of the air mass in place. As temperatures begin to rebound in the Monday / Tuesday time frame, expect PM 2.5 levels to rise back to the good / moderate threshold. Levels will fall off on Wednesday as the high to the east deliver the cold and dry conditions. Once the high moves off to our east and warm air returns late in the week, expect PM 2.5 levels to increase back into the moderate category. --Nolan

Current Conditions
Air Quality Index (AQI)
observed at 13:00 EST
53
Moderate
Health Message: Unusually sensitive people should consider reducing prolonged or heavy exertion.
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
Particles (PM2.5) 53 Moderate
Ozone 31 Good

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