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Primary air pollutant in the St. Helena area:
PM2.5 - 86 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 - 3 Good
Primary Pollutant: PM2.5 - 50 Good
Primary Pollutant: PM2.5 - 58 Moderate
Primary Pollutant: PM2.5 - 0 Moderate
Primary Pollutant: PM2.5 - 0 Moderate
Primary Pollutant: PM2.5 - 0 Moderate
Primary Pollutant: PM2.5 - 0 Moderate