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  • Spare the Air Status for Friday, May 09, 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: 05/09/25 7:00 AM PDT
      AQI: Moderate (51 - 100)
      Moderate - 54 AQI - Ozone
      Good - 28 AQI - Particle Pollution (2.5 microns)
      Agency: Bay Area Air District
      Last Update: Fri, 09 May 2025 06:15:02 PST

    • Location: Fremont, CA
      Forecast: Today, 05/09/2025:
      Good - 49 AQI - Ozone
      Tomorrow, 05/10/2025:
      Good - Ozone
      Sunday, 05/11/2025:
      Good - Ozone
      Monday, 05/12/2025:
      Good - Ozone
      Tuesday, 05/13/2025:
      Good - Ozone
      Agency: Bay Area Air District
      Last Update: Fri, 09 May 2025 06:15:04 PST


    • AQI and Pollutant Forecast for Thursday by district.
      North Counties - AQI: 44, Pollutant: OZONE.
      Coast and Central Bay - AQI: 53, Pollutant: PM2.5.
      Eastern District - AQI: 48, Pollutant: OZONE
      South and Central Bay - AQI: 46, Pollutant: OZONE
      Santa Clara Valley - AQI: 49, Pollutant: OZONE
    • AQI and Pollutant Forecast for Friday by district.
      North Counties - AQI: 44, Pollutant: OZONE.
      Coast and Central Bay - AQI: 53, Pollutant: PM2.5.
      Eastern District - AQI: 61, Pollutant: OZONE
      South and Central Bay - AQI: 49, Pollutant: OZONE
      Santa Clara Valley - AQI: 74, Pollutant: OZONE
    • AQI and Pollutant Forecast for Saturday by district.
      North Counties - AQI: Good, Pollutant: OZONE.
      Coast and Central Bay - AQI: Moderate, Pollutant: PM2.5.
      Eastern District - AQI: Good, Pollutant: OZONE
      South and Central Bay - AQI: Good, Pollutant: OZONE
      Santa Clara Valley - AQI: Moderate, 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