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Primary air pollutant in the Smithfield area:
PM2.5 - 0 Good
Enjoy your outdoor activities.
Primary Pollutant: PM2.5 - 35 Good
Primary Pollutant: PM2.5 - 40 Good
Primary Pollutant: PM2.5 - 45 Good
Primary Pollutant: PM2.5 - 48 Good