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Primary air pollutant in the San Bruno area:
PM2.5 - 29 Good
Enjoy your outdoor activities.
Primary Pollutant: PM2.5 - 55 Moderate
Primary Pollutant: PM2.5 - 56 Moderate
Primary Pollutant: PM2.5 - 0 Moderate
Primary Pollutant: PM2.5 - 0 Moderate