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  • Spare the Air Status for Friday, January 17, 2025

    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: 01/17/25 5:00 PM PST
      Good - 37 AQI - Particle Pollution (2.5 microns)
      Good - 21 AQI - Ozone
      Agency: San Francisco Bay Area AQMD
      Last Update: Fri, 17 Jan 2025 05:45:01 PST

    • Location: Fremont, CA
      Forecast: Today, 01/17/2025:
      AQI: Moderate (51 - 100)
      Moderate - 55 AQI - Particle Pollution (2.5 microns)
      Tomorrow, 01/18/2025:
      AQI: Moderate (51 - 100)
      Moderate - 60 AQI - Particle Pollution (2.5 microns)
      Sunday, 01/19/2025:
      AQI: Moderate (51 - 100)
      Moderate - 58 AQI - Particle Pollution (2.5 microns)
      Monday, 01/20/2025:
      AQI: Moderate (51 - 100)
      Moderate - 53 AQI - Particle Pollution (2.5 microns)
      Tuesday, 01/21/2025:
      AQI: Moderate (51 - 100)
      Moderate - Particle Pollution (2.5 microns)
      Wednesday, 01/22/2025:
      AQI: Moderate (51 - 100)
      Moderate - Particle Pollution (2.5 microns)
      Agency: San Francisco Bay Area AQMD
      Last Update: Fri, 17 Jan 2025 05:45:03 PST


    • AQI and Pollutant Forecast for Friday by district.
      North Counties - AQI: 81, Pollutant: PM2.5.
      Coast and Central Bay - AQI: 77, Pollutant: PM2.5.
      Eastern District - AQI: 60, Pollutant: PM2.5
      South and Central Bay - AQI: 55, Pollutant: PM2.5
      Santa Clara Valley - AQI: 73, Pollutant: PM2.5
    • AQI and Pollutant Forecast for Saturday by district.
      North Counties - AQI: 68, Pollutant: PM2.5.
      Coast and Central Bay - AQI: 64, Pollutant: PM2.5.
      Eastern District - AQI: 62, Pollutant: PM2.5
      South and Central Bay - AQI: 60, Pollutant: PM2.5
      Santa Clara Valley - AQI: 66, Pollutant: PM2.5
    • AQI and Pollutant Forecast for Sunday by district.
      North Counties - AQI: 71, Pollutant: PM2.5.
      Coast and Central Bay - AQI: 68, Pollutant: PM2.5.
      Eastern District - AQI: 60, Pollutant: PM2.5
      South and Central Bay - AQI: 58, Pollutant: PM2.5
      Santa Clara Valley - AQI: 69, Pollutant: PM2.5
    • AQI and Pollutant Forecast for Monday by district.
      North Counties - AQI: 64, Pollutant: PM2.5.
      Coast and Central Bay - AQI: 62, Pollutant: PM2.5.
      Eastern District - AQI: 55, Pollutant: PM2.5
      South and Central Bay - AQI: 53, Pollutant: PM2.5
      Santa Clara Valley - AQI: 60, Pollutant: PM2.5
    • AQI and Pollutant Forecast for Tuesday by district.
      North Counties - AQI: Moderate, Pollutant: PM2.5.
      Coast and Central Bay - AQI: Moderate, Pollutant: PM2.5.
      Eastern District - AQI: Moderate, Pollutant: PM2.5
      South and Central Bay - AQI: Moderate, Pollutant: PM2.5
      Santa Clara Valley - AQI: Moderate, Pollutant: PM2.5