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Primary air pollutant in the Signal Hill area:
PM2.5 - 63 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 - 6 Good
PM10 - 19 Good
Primary Pollutant: PM2.5 - 53 Moderate
Secondary Pollutant: PM10 - 29 Good
Secondary Pollutant: CO - 14 Good
Secondary Pollutant: OZONE - 47 Good
Secondary Pollutant: NO2 - 29 Good