Liberty/Clairton area
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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
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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
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Air Quality Index (AQI)
Health Message: Unusually sensitive people should consider reducing prolonged or heavy exertion.
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AQI - Pollutant Details
Particles (PM2.5)
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Forecast Discussion: Current Conditions: As of 2 PM on Thursday, partly cloudy skies persist over the region as an area of high pressure, which was off to our west on Wednesday, resides over northern New England. The clockwise flow around the high is helping to steer our flow out of the southeast. The southeasterly winds are, in turn, forcing temperatures to rise into the low 60s (a 20+ degree jump from this time yesterday). Even though temperatures are rising, moisture levels are not. It is the low moisture levels along with the moderate winds that are keeping PM 2.5 levels from rising out of the good category. Expect fine particulate concentrations to rise into the low moderate range as humidity levels begin to increase. *** Friday's Forecast: So for Friday, expect partly sunny skies to prevail across the area during the day as the high pressure system, which was over the Northeastern US on Thursday, continues to push into the northern Atlantic. At the same time, a new cold front will move through the Ohio Valley / Great Lakes region. This frontal system will not provide much in the form of rain. But it will help steer our winds out of the southwest, which, in turn, will drive up humidity levels. In addition, it will remain warm, with highs peaking in the mid 60s. Air quality levels will continue to be function of how warm and moist the air mass is. With temperatures hovering near Thursday's high, the increase in moisture will be key in forcing PM 2.5 levels to eclipse the good / moderate range and rise into the low moderate range. *** Extended Outlook: Over the coming days, expect to see the overall pattern remain progressive as a series of frontal systems move through the region. Here is how things are shaping up... Over the weekend, expect the frontal passage late Friday to allow drier air to build in over the region. This drier air, along with winds residing out of the north, will help to keep PM 2.5 levels within the good range. PM 2.5 levels will begin to rebound on Easter Sunday as higher pressure builds in over the Northeastern US. These atmospheric conditions will also promote warmer temperatures over the region (with highs likely peaking in the 70s in the Sunday to Tuesday time frame). As the high pressure system begins to pull away from the region early in the week, we will see a new frontal system push in from the west. This system is likely to impact us on Tuesday. As it passes through, expect to see a chance of rain. Once through, a brief cool and dry impulse of air will impact the region on Wednesday before we rebound toward the end of the week. A new storm system is expected to impact us next weekend. Overall, PM2.5 (and maybe even ozone) levels during the period are expected to peak in the moderate range during periods when we see the magical mix of warm and moist conditions over the region. The lowest concentrations are expected to occur on Wednesday when the impulse of cool and dry air bleeds into the region. --Nolan

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