Home > USA > California > Contra Costa County > Knightsen
Primary air pollutant in the Knightsen area:
PM2.5 - 67 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 - 18 Good
Primary Pollutant: PM2.5 - 60 Moderate
Primary Pollutant: PM2.5 - 53 Moderate