Air Quality Informaton


  • Spare the Air Status for Sunday, July 13, 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: 07/13/25 12:00 AM PDT
      Good - 24 AQI - Particle Pollution (2.5 microns)
      Good - 19 AQI - Ozone
      Agency: Bay Area Air District
      Last Update: Sat, 12 Jul 2025 11:15:00 PST

    • Location: Fremont, CA
      Forecast: Today, 07/13/2025:
      Good - 50 AQI - Particle Pollution (2.5 microns)
      Tomorrow, 07/14/2025:
      AQI: Moderate (51 - 100)
      Moderate - 53 AQI - Particle Pollution (2.5 microns)
      Monday, 07/14/2025:
      AQI: Moderate (51 - 100)
      Moderate - 53 AQI - Particle Pollution (2.5 microns)
      Tuesday, 07/15/2025:
      AQI: Moderate (51 - 100)
      Moderate - Particle Pollution (2.5 microns)
      Wednesday, 07/16/2025:
      AQI: Moderate (51 - 100)
      Moderate - Particle Pollution (2.5 microns)
      Thursday, 07/17/2025:
      AQI: Moderate (51 - 100)
      Moderate - Particle Pollution (2.5 microns)
      Agency: Bay Area Air District
      Last Update: Sat, 12 Jul 2025 11:15:04 PST


    • AQI and Pollutant Forecast for Saturday by district.
      North Counties - AQI: 56, Pollutant: PM2.5.
      Coast and Central Bay - AQI: 53, Pollutant: PM2.5.
      Eastern District - AQI: 58, Pollutant: PM2.5
      South and Central Bay - AQI: 50, Pollutant: PM2.5
      Santa Clara Valley - AQI: 55, Pollutant: PM2.5
    • AQI and Pollutant Forecast for Sunday by district.
      North Counties - AQI: 62, Pollutant: PM2.5.
      Coast and Central Bay - AQI: 55, Pollutant: PM2.5.
      Eastern District - AQI: 60, Pollutant: PM2.5
      South and Central Bay - AQI: 53, Pollutant: PM2.5
      Santa Clara Valley - AQI: 56, Pollutant: PM2.5
    • AQI and Pollutant Forecast for Monday by district.
      North Counties - AQI: 60, Pollutant: PM2.5.
      Coast and Central Bay - AQI: 53, Pollutant: PM2.5.
      Eastern District - AQI: 55, Pollutant: PM2.5
      South and Central Bay - AQI: 53, Pollutant: PM2.5
      Santa Clara Valley - AQI: 56, 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
    • AQI and Pollutant Forecast for Wednesday 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