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Primary air pollutant in the Challis area:
PM2.5 - 6 Good
Enjoy your outdoor activities.
Primary Pollutant: PM2.5 - 40 Good
Primary Pollutant: PM2.5 - 36 Good
Primary Pollutant: PM2.5 - 41 Good
Primary Pollutant: PM2.5 - 40 Good
Primary Pollutant: PM2.5 - 39 Good
Primary Pollutant: PM2.5 - 33 Good
Primary Pollutant: PM2.5 - 37 Good