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Primary air pollutant in the Castro Valley area:
OZONE - 26 Good
Enjoy your outdoor activities.
Primary Pollutant: PM2.5 - 90 Moderate
Primary Pollutant: PM2.5 - 55 Moderate
Primary Pollutant: PM2.5 - 0 Moderate
Primary Pollutant: PM2.5 - 0 Moderate
Primary Pollutant: PM2.5 - 0 Good
Primary Pollutant: PM2.5 - 0 Good