PHILADELPHIA (WPVI) -- With smoke blowing into the Philadelphia region from the wildfires in Canada, you may have heard a lot about the Air Quality Index or AQI. But what it is, exactly? The Air ...
An air quality alert is in effect through Sunday night for several counties in central Pa., which means there will be an increase in fine particulate matter in the air. The Pennsylvania Department of ...
Canadian wildfire smoke is affecting air quality in parts of Michigan. The EPA's air quality index (AQI) uses a color-coded scale to inform the public about air quality and associated health risks.
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