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Grand County—Current Conditions

September 26, 2023 6:00 AM (updated hourly)

PM 2.5

14 µg/m3


0.021 ppm





As with temperature, air pollution varies throughout the day.

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Smoke from wild fires could cause high concentrations of particulates in populated areas. If smoke becomes thick, persons with existing heart or respiratory ailments should reduce physical exertion and outdoor activity. Wild Fire Outlooks


The data displayed on this page represents the current air pollution levels and meteorological values, and is not quality assured. For quality assured data please visit

Particulate matter (PM), also known as particle pollution, is a complex mixture of extremely small dust and soot particles. For more information visit Air Pollutants: Particulate Matter.

Ozone (O3) is formed when hydrocarbons and nitrogen oxides chemically react in the presence of sunlight and heat. For more information visit Air Pollutants: Ozone.

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