Worst air pollution Antioch, today and tomorrow
Today (15 July): Air quality in Antioch is fair. AQI and O3 are fair; PM2.5, PM10, NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 9:00 AM (O3: 37.9/100).
Tomorrow (16 July 2026): Air quality in Antioch is medium. AQI improves to medium; O3 decreases to medium; all other pollutants stay as today. Pollution peaks around 10:00 AM (O3: 40.2/100). Airmine updates local air quality forecasts four times daily.
For long term forecasts and maps, see the Airmine app
Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
Use our Strava plugin to check your own exposure.
Antioch's air quality in California reflects the Delta corridor's position at the confluence of the Sacramento and San Joaquin rivers, with the Delta breeze from San Francisco Bay providing afternoon ventilation that offers some relief from the San Joaquin Valley inversion. Vehicle emissions from Highway 4 and industrial emissions from the nearby Contra Costa power plant corridor contribute local sources, while agricultural burning from the San Joaquin Valley adds seasonal PM2.5.
Today - 15 July | Pollution peaks at 09:00
AQI:
Fair
37.9/100
PM2.5 (fine particles):
Good
12.6/100
PM10 (coarse particles):
Good
8.0/100
NO2 (nitrogen dioxide):
Good
4.9/100
O3 (ozone):
Fair
37.9/100
SO2 (sulfur dioxide):
Good
1.6/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
1.8/100
PM1 (ultrafine particles):
Good
6.8/100
Levels show the poorest local air quality during the day
Tomorrow - 16 July | Pollution peaks at 10:00
AQI:
Medium
40.2/100
PM2.5 (fine particles):
Good
18.9/100
PM10 (coarse particles):
Good
9.1/100
NO2 (nitrogen dioxide):
Good
11.0/100
O3 (ozone):
Medium
40.2/100
SO2 (sulfur dioxide):
Good
1.6/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
1.7/100
PM1 (ultrafine particles):
Good
12.6/100
Pollen forecast in Antioch
View pollen forecastFrequently Asked Questions
Is air quality bad in Antioch right now?
On 15 July 2026, overall air quality in Antioch is fair. AQI is the main air quality indicator at 37.9/100. Pollution peaks around 9:00 AM (O3: 37.9/100).
Will air quality be worse tomorrow in Antioch?
On 16 July 2026, air quality conditions in Antioch will be better than today, with AQI forecast at medium at 40.2/100. Pollution peaks around 10:00 AM (O3: 40.2/100).
When is air pollution at its worst in Antioch?
Antioch's air quality follows a clear seasonal pattern, as winter typically brings the cleanest stretch, once occasional rain clears the basin; by contrast, summer sunshine and heat drive some of the worst ozone readings in the country. Coastal breezes offer some relief compared to inland valley locations that see heavier smog buildup.
Are air quality levels in Antioch based on measurements or forecasts?
It is forecasts derived by downscaling forecasts provided by EU’s Copernicus Atmosphere Monitoring Service (CAMS) by taking into account local conditions such as traffic patterns. CAMS bases its forecast on satellite measurements of particles and chemical compounds in the atmosphere. Airmine’s services were developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team.
Want to see air quality forecasts for other cities in United States?
Check air quality in other popular cities:
Data provided by Airmine — Last update: 16 July 2026 at 10:33 CEST (Data is updated four times daily.)
This forecast is produced independently using Airmine's own atmospheric data and models.
Unless explicitly made clear, the content on this site has not been paid for by external organisations and is Airmine's sole responsibility.
For long term forecasts and maps, see the Airmine app