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Primary air pollutant in the Downey area:
PM2.5 - 73 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 - 4 Good
PM10 - 21 Good
Primary Pollutant: PM2.5 - 50 Good
Secondary Pollutant: CO - 20 Good
Secondary Pollutant: NO2 - 35 Good
Secondary Pollutant: PM10 - 30 Good
Secondary Pollutant: OZONE - 48 Good