Pittsburgh
 
Data and Forecasts courtesy of:
 

 
AQI: Good (0 - 50) AQI: Good (0 - 50)
Air quality is considered satisfactory, and air pollution poses little or no risk.
AQI: Moderate (51 - 100) AQI: Moderate (51 - 100)
Air quality is acceptable; however, for some pollutants there may be a moderate health concern for a very small number of people who are unusually sensitive to air pollution.
AQI: Unhealthy for Sensitive Groups (101 - 150) AQI: Unhealthy for Sensitive Groups (101 - 150)
Although general public is not likely to be affected at this AQI range, people with lung disease, older adults and children are at a greater risk from exposure to ozone, whereas persons with heart and lung disease, older adults and children are at greater risk from the presence of particles in the air.
AQI: Unhealthy (151 - 200) AQI: Unhealthy (151 - 200)
Everyone may begin to experience health effects members of sensitive groups may experience more serious health effects.
 AQI:Very Unhealthy (201 - 300) AQI: Very Unhealthy (201 - 300)
Health alert: everyone may experience more serious health effects.
AQI: Hazardous(301 - 500) AQI: Hazardous (301 - 500)
Health warnings of emergency conditions. The entire population is more likely to be affected.
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
 
Data and Forecasts courtesy of:
Air Quality Forecast
Today's High Tomorrow's High
Air Quality Index (AQI)
65 
Moderate
Health Message: Unusually sensitive people should consider reducing prolonged or heavy exertion.
Air Quality Index (AQI)
50 
Good
Health Message: None
AQI - Pollutant Details
Ozone
40 
Good
Particles (PM2.5)
65 
Moderate
Ozone
50 
Good
Particles (PM2.5)
50 
Good
Forecast Discussion: Current Conditions: As of 2 PM on Friday, mostly cloudy skies prevail over the region as the storm system, which provided rain across the region yesterday and earlier this morning, continues to track northeastward through the New England states. At the same time, a new storm system is beginning to develop across the Midwest. Right now, westerly winds persist across the area, forcing temperatures into the 60s. Thanks to the cloud cover and lower temperatures, ozone and PM 2.5 levels have struggled to make their way out of the good range thus far today. Over the weekend, it should be a similar story. An increasing chance of rain on Saturday and Sunday should limit ozone. On Monday, we should salvage a half decent day as it clears up with a new area of high pressure building in from the west. Overall, peak air quality levels should linger near the good / moderate threshold. Now onto the day-to-day details... *** On Saturday, overcast skies will persist over western PA as the storm system, which began to gain some steam on Friday across the Midwest, slides east across the Ohio Valley. In advance of the front, winds will turn more out of the southwest, resulting in an increase in temperatures and humidity. In addition, we could see some showers and thunderstorms develop during the day. Overall, it will be the increase of moisture and warmth (near seasonable levels in the mid 70s) that will allow PM 2.5 levels to rise into the low moderate range. Ozone will remain confined to the good range thanks to the cloud cover and increased rain chances. *** For Sunday, the clouds will continue to be the primary feature in the sky thanks in part to the frontal system, which was slowly tracking eastward on Saturday, moving closer to our area, the threat of rain will continue to increase. The showers and thunderstorms that develop are expected to be heavier than they were on Saturday as the rain makes its way east across PA. Overall, temperatures will rise well into the 70s, compliments of the southerly winds across the region. The influx of moisture will also accompany the warmth, which will mean another day of moderate PM 2.5 levels. Like on Saturday, it will be the clouds and rain that will limit ozone production to the good threshold. *** On Memorial Day, mostly cloudy skies early in the day will give way to partly sunny skies by the afternoon as the main cold front, which contributed to the shower development over the region this past weekend, pushes through western PA. In advance of the front, we could still see an isolated shower. After the front moves through, drier weather will begin to build in. Temperatures will still remain in the 70s as the winds remain out of the southwest. The combination of the drier weather and clearer skies building in will allow PM 2.5 levels to fall back into the good range but ozone levels to rise closer to the good / moderate threshold. *** For Tuesday, expect clouds to continue to dominate our skyline as an upper level low slowly tracks across southern Canada (just north of the Great Lakes). Upper level lows this time of year usually keep cooler air aloft, which means there will be an increase in cloud cover and rain chances. Tuesday is not fairing any differently. Moisture rotating counter clockwise around the low will help to trigger some isolated showers during the day. Due to the persistence of this low, temperatures will remain on the cooler side of normal, with highs only peaking near 70. The impacts of the new air mass moving in will also be felt in the air quality as ozone and PM 2.5 levels only rise into the good range. --Nolan

Current Conditions
Air Quality Index (AQI)
observed at 8:00 EDT
73
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
Ozone 15 Good
Particles (PM2.5) 73 Moderate

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