Home > USA > California > San Mateo County > Hillsborough
Primary air pollutant in the Hillsborough area:
PM2.5 - 21 Good
Enjoy your outdoor activities.
Other Pollutants:
OZONE - 2 Good
Primary Pollutant: PM2.5 - 44 Good
Primary Pollutant: PM2.5 - 55 Moderate
Primary Pollutant: PM2.5 - 0 Moderate
Primary Pollutant: PM2.5 - 0 Moderate
Primary Pollutant: PM2.5 - 0 Moderate
Primary Pollutant: PM2.5 - 0 Moderate