Air Quality Informaton

AIRNow Alerts


Union City, CA Current AQI (PurpleAir Sensor)

Union City Current AQI

Union City Current AQI


    Spare the Air Status for Saturday, February 24, 2018
    No Alert



    Location: Fremont, CA
    Current Air Quality: 02/23/18 11:00 PM PST

    Good - 34 AQI - Particle Pollution (2.5 microns)

    Good - 31 AQI - Ozone

    Agency: San Francisco Bay Area AQMD
    Last Update: Fri, 23 Feb 2018 11:45:05 PST


    Location: Fremont, CA
    Forecast:
    Today, 02/23/2018:
    Good - 40 AQI - Ozone

    Tomorrow, 02/24/2018:
    Good - 33 AQI - Ozone

    Agency: San Francisco Bay Area AQMD
    Last Update: Fri, 23 Feb 2018 11:45:13 PST

Current Air Quality Index Map

Current AQI
0-50 Good
51-100 Moderate
101-150 Unhealthy for Sensitive Groups
151-200 Unhealthy
201-300 Very Unhealthy
301-500 Hazardous
AQI Maps courtesy of AIRNow.gov


Air Quality Index Map Animation

AQI Animation
0-50 Good
51-100 Moderate
101-150 Unhealthy for Sensitive Groups
151-200 Unhealthy
201-300 Very Unhealthy
301-500 Hazardous
AQI Maps courtesy of AIRNow.gov



  • AQI and Pollutant Forecast for Friday by district.
    North Counties - AQI: 42, Pollutant: PM2.5.
    Coast and Central Bay - AQI: 38, Pollutant: PM2.5.
    Eastern District - AQI: 38, Pollutant: OZONE
    South and Central Bay - AQI: 40, Pollutant: OZONE
    Santa Clara Valley - AQI: 36, Pollutant: OZONE
  • AQI and Pollutant Forecast for Saturday by district.
    North Counties - AQI: 53, Pollutant: PM2.5.
    Coast and Central Bay - AQI: 50, Pollutant: PM2.5.
    Eastern District - AQI: 35, Pollutant: OZONE
    South and Central Bay - AQI: 33, Pollutant: OZONE
    Santa Clara Valley - AQI: 34, Pollutant: OZONE
  • AQI and Pollutant Forecast for Sunday by district.
    North Counties - AQI: 53, Pollutant: PM2.5.
    Coast and Central Bay - AQI: 46, Pollutant: PM2.5.
    Eastern District - AQI: 39, Pollutant: OZONE
    South and Central Bay - AQI: 34, Pollutant: OZONE
    Santa Clara Valley - AQI: 36, Pollutant: OZONE
  • AQI and Pollutant Forecast for Monday by district.
    North Counties - AQI: 50, Pollutant: PM2.5.
    Coast and Central Bay - AQI: 42, Pollutant: PM2.5.
    Eastern District - AQI: 40, Pollutant: OZONE
    South and Central Bay - AQI: 35, Pollutant: OZONE
    Santa Clara Valley - AQI: 38, Pollutant: OZONE
  • AQI and Pollutant Forecast for Tuesday by district.
    North Counties - AQI: Good, Pollutant: PM2.5.
    Coast and Central Bay - AQI: Good, Pollutant: PM2.5.
    Eastern District - AQI: Good, Pollutant: OZONE
    South and Central Bay - AQI: Good, Pollutant: OZONE
    Santa Clara Valley - AQI: Good, Pollutant: OZONE