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Primary air pollutant in the National City area:
PM2.5 - 90 Moderate
If you are unusually sensitive to particle pollution, consider reducing your activity level or shorten the amount of time you are active outdoors.
Other Pollutants:
OZONE - 15 Good
PM10 - 60 Moderate
Primary Pollutant: PM2.5 - 77 Moderate
Secondary Pollutant: OZONE - 47 Good
Primary Pollutant: PM2.5 - 71 Moderate
Secondary Pollutant: OZONE - 54 Moderate
Primary Pollutant: PM2.5 - 69 Moderate
Secondary Pollutant: OZONE - 64 Moderate