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)

Realtime PurpleAir Sensor Map
PurpleAir Sensor Map courtesy of PurpleAir.com
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Northern Section: No Burn
Southern Section: No Burn
Coastal Section: No Burn -
Northern Section: No Burn
Southern Section: No Burn
Coastal Section: No Burn
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Location: Fremont, CACurrent Air Quality: 07/13/25 12:00 AM PDTGood - 24 AQI - Particle Pollution (2.5 microns)Good - 19 AQI - OzoneAgency: Bay Area Air DistrictLast Update: Sat, 12 Jul 2025 11:15:00 PST
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Location: Fremont, CAForecast: Today, 07/13/2025:Good - 50 AQI - Particle Pollution (2.5 microns)Tomorrow, 07/14/2025:Moderate - 53 AQI - Particle Pollution (2.5 microns)Monday, 07/14/2025:Moderate - 53 AQI - Particle Pollution (2.5 microns)Tuesday, 07/15/2025:Moderate - Particle Pollution (2.5 microns)Wednesday, 07/16/2025:Moderate - Particle Pollution (2.5 microns)Thursday, 07/17/2025:Moderate - Particle Pollution (2.5 microns)Agency: Bay Area Air DistrictLast Update: Sat, 12 Jul 2025 11:15:04 PST
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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