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Primary air pollutant in the San Marcos area:
PM2.5 - 35 Good
Enjoy your outdoor activities.
Other Pollutants:
PM10 - 20 Good
OZONE - 6 Good
Primary Pollutant: PM2.5 - 44 Good
Secondary Pollutant: OZONE - 43 Good
Primary Pollutant: PM2.5 - 50 Good
Secondary Pollutant: OZONE - 46 Good