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: None
Data Not Available
AQI - Pollutant Details
Particles (PM2.5)
Data Not Available
Forecast Discussion: Current Conditions: As of 2 PM on Friday, partly cloudy skies prevail over the region as an area of high pressure begins to build in across the eastern US. Right now, northwesterly flow continues to advect in cool and dry conditions over the region. The wind, which is gusting upwards of 25 miles per hour, is also helping to keep the boundary layer well mixed. So the combination of the temperatures hovering near the 50 degree mark along with gusty winds and the dry conditions are helping to hold PM 2.5 levels within the good threshold. Expect good air quality to persist through the weekend as temperatures warm into the 50s and a storm system passes through the region. Now onto the day-to-day details... *** On Saturday, expect partly cloudy skies in the morning to give way to mostly cloudy skies during the afternoon as a storm system, with origins over the central Plains, slides east through the Ohio Valley. This storm system is slated to push some rain in over region during the second half of the day. As a result, expect there to be adequate mixing within the boundary layer. The combination of cool afternoon temperatures (highs will reach in the mid 50s) and the afternoon showers will help to keep PM 2.5 levels confined to the good category. *** For Sunday, expect mostly cloudy skies early in the day to give way to partly sunny skies during the afternoon as the storm system, which impacted our weather on Saturday, slides off to our east. The system could even trigger an early morning shower before it pulls away from the region. Once the system moves off to our east, the winds will steer more out of the northwest, allowing cooler and drier air to begin to filter in. Overall, high temperatures should peak in the upper 50s. With the winds picking up in intensity and the influx of drier air later in the day, expect PM 2.5 levels to stay within the good threshold. *** On Monday, partly sunny skies will continue to persist as an area of high pressure builds in over the Midwestern US. The combination of this high and the departing storm system from Sunday will steer our flow out of the north. The northerly flow will, in turn, force cooler, drier air in from eastern Canada. As a result, expect afternoon highs to only peak in the mid 50s. The combination of the cool, dry and windy conditions will keep PM 2.5 levels from rising out of the good range. *** Extended Outlook: As we take a peek into next week, we notice that the week will start off on the cool and dry side after a storm system impacts our area early Sunday. The return flow on the backside of the storm system will be out of the north, resulting in these cool and dry conditions. The area of high pressure will eventually shift into the Mid-Atlantic (by the middle of the week). As it does, expect temperatures to rebound closer to normal. At the same time, a storm system will take shape over the southeastern US. While the storm system is not expected to impact us with precipitation, we will feel the effects during the second half of the week as our winds turn more easterly and keep temperatures from rising far from normal. Ultimately, as the storm pulls off the coast late in the week, a pool of cool and dry air will drive southward across the Northeastern US. Overall, air quality levels during the time frame are generally expected to stay within the good category. There could be times during the work week when levels approach the good / moderate category when the temperatures return closer to normal. --Nolan

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