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Primary air pollutant in the West Covina area:
PM2.5 - 64 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:
PM10 - 28 Good
OZONE - 16 Good
Primary Pollutant: OZONE - 97 Moderate
Secondary Pollutant: PM2.5 - 55 Moderate
Secondary Pollutant: PM10 - 26 Good
Secondary Pollutant: CO - 4 Good
Secondary Pollutant: NO2 - 16 Good
Primary Pollutant: OZONE - 115 Unhealthy for Sensitive Groups
Secondary Pollutant: PM2.5 - 56 Moderate
Secondary Pollutant: PM10 - 31 Good
Secondary Pollutant: CO - 4 Good
Secondary Pollutant: NO2 - 14 Good