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  • Spare the Air Status for Thursday, April 25, 2024

    No Spare the Air Alert in Effect
AIRNow Alerts - San Francisco Bay Area AQMD


    Union City, CA Current AQI (PurpleAir Sensor)



    Union City Current AQI

    Realtime PurpleAir Sensor Map

    PurpleAir Sensor Map courtesy of PurpleAir.com




    • Location: Fremont, CA
      Current Air Quality: 04/25/24 9:00 AM PDT
      Good - 23 AQI - Particle Pollution (2.5 microns)
      Good - 19 AQI - Ozone
      Agency: San Francisco Bay Area AQMD
      Last Update: Thu, 25 Apr 2024 08:45:01 PST

    • Location: Fremont, CA
      Forecast: Today, 04/25/2024:
      Good - 39 AQI - Ozone
      Tomorrow, 04/26/2024:
      Good - 40 AQI - Ozone
      Saturday, 04/27/2024:
      Good - Ozone
      Sunday, 04/28/2024:
      Good - Ozone
      Monday, 04/29/2024:
      Good - Ozone
      Tuesday, 04/30/2024:
      Good - Ozone
      Agency: San Francisco Bay Area AQMD
      Last Update: Thu, 25 Apr 2024 08:45:02 PST

    Current Air Quality Index Map


    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 Thursday by district.
      North Counties - AQI: 37, Pollutant: OZONE.
      Coast and Central Bay - AQI: 42, Pollutant: PM2.5.
      Eastern District - AQI: 40, Pollutant: OZONE
      South and Central Bay - AQI: 39, Pollutant: OZONE
      Santa Clara Valley - AQI: 39, Pollutant: OZONE
    • AQI and Pollutant Forecast for Friday by district.
      North Counties - AQI: 38, Pollutant: OZONE.
      Coast and Central Bay - AQI: 46, Pollutant: PM2.5.
      Eastern District - AQI: 41, Pollutant: OZONE
      South and Central Bay - AQI: 40, Pollutant: OZONE
      Santa Clara Valley - AQI: 40, Pollutant: OZONE
    • AQI and Pollutant Forecast for Saturday by district.
      North Counties - AQI: Good, Pollutant: OZONE.
      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
    • AQI and Pollutant Forecast for Sunday by district.
      North Counties - AQI: Good, Pollutant: OZONE.
      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
    • AQI and Pollutant Forecast for Monday by district.
      North Counties - AQI: Good, Pollutant: OZONE.
      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