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
Local Air Quality Resources
Current Air Quality Index | Forecast
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 is undergoing maintenance. Updates for the forecasts and current conditions are not available between midnight and 4 am EST.

Air Quality Forecast
Today's High Tomorrow's High
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: This Weekend's Air Quality Forecast: On Saturday, sunny skies will persist over the region as the area of high pressure, which was over Iowa on Friday, moves east and over our area. As the high moves into place, expect our winds to die down. These lighter winds coupled with the relatively cloud free skies will help to drive afternoon highs into the mid 20s. The combination of the warmer air moving in along with the limit in mixing at the surface will allow PM 2.5 levels to rise back into the moderate range. *** For Sunday, expect the clouds to be on the increase during the day as the high pressure, which was directly overhead on Saturday, shifts off to our east. At the same time, a weak storm system will make its way out of the central Plains and into the Ohio Valley. Late in the day, precipitation associated with this system will move in over our area. Overall, southerly winds during the day will allow temperatures to rebound to the mid 30s. Therefore, as the precipitation moves in late in the day, expect it to be a mix of rain / snow. Overall, the increase in low level moisture along with warming aloft will limit vertical mixing, forcing PM 2.5 levels into the moderate range again. *** On Monday, mostly cloudy skies will persist over the region as the storm system, which first moved in late Sunday, shifts east of our region. So other than some lingering snow in the morning hours, expect the weather to be primarily dry. A new area of high pressure will begin moving into the Ohio Valley during the second half of the day. Due to the positioning of the high, expect colder and drier air to build in late in the day. Overall, temperatures should hover near the freezing. With lingering precipitation during the morning hours, PM 2.5 levels are expected to remain within the low moderate range. *** Extended Outlook: As we take a peek into next week, we notice that the week will start off on unseasonably cool side as some rain / snow moves through the region. An area of high pressure will quickly build into the Ohio Valley on Monday, keeping temperatures in the low 30s. Once the high moves offshore and a new area of low pressure pushes into the northeastward through the Great Lakes region, expect our winds to turn southerly and a flood of warm air to move northward. Temperatures on Tuesday into Wednesday could peak in the 40s before a cold front pushes through. The cold front passage will drop temperatures to below normal levels to end the week. Overall, air quality levels during the period are expected to remain elevated early on. Once the warmer, more humid air mass moves in on Tuesday into Wednesday, expect air quality to hover near the good / moderate threshold before falling back to the good range to end the week as the colder air moves back in. --Nolan

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