Worst air pollution Pomona, today and tomorrow
Today (15 July): Air quality in Pomona is fair. AQI, PM10, and O3 are fair; PM2.5, NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 8:00 AM (O3: 31.2/100).
Tomorrow (16 July 2026): Air quality in Pomona is fair. All pollutants stay as today. Pollution peaks around 9:00 AM (O3: 29.9/100). Airmine updates local air quality forecasts four times daily.
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Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
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Pomona's air quality reflects the San Gabriel Valley's enclosed position in the greater Los Angeles basin, with vehicle emissions from SR-60, I-10, and the nearby Cal Poly Pomona and the massive Ontario-Pomona rail intermodal and logistics hub generating concentrated freight NOₓ and diesel PM2.5. The valley position between the San Gabriel and Puente Hills creates severe inversion trapping, while the Pomona-Chino corridor's industrial concentration makes it one of the San Gabriel Valley's more persistently polluted urban air quality environments.
Today - 15 July | Pollution peaks at 08:00
AQI:
Fair
31.2/100
PM2.5 (fine particles):
Good
17.6/100
PM10 (coarse particles):
Fair
26.4/100
NO2 (nitrogen dioxide):
Good
0.8/100
O3 (ozone):
Fair
31.2/100
SO2 (sulfur dioxide):
Good
1.5/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
0.9/100
PM1 (ultrafine particles):
Good
3.0/100
Levels show the poorest local air quality during the day
Tomorrow - 16 July | Pollution peaks at 09:00
AQI:
Fair
29.9/100
PM2.5 (fine particles):
Good
16.3/100
PM10 (coarse particles):
Fair
27.3/100
NO2 (nitrogen dioxide):
Good
1.7/100
O3 (ozone):
Fair
29.9/100
SO2 (sulfur dioxide):
Good
2.6/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
1.0/100
PM1 (ultrafine particles):
Good
3.2/100
Pollen forecast in Pomona
View pollen forecastFrequently Asked Questions
Is air quality bad in Pomona right now?
On 15 July 2026, overall air quality in Pomona is fair. AQI is the main air quality indicator at 31.2/100. Pollution peaks around 8:00 AM (O3: 31.2/100).
Will air quality be worse tomorrow in Pomona?
On 16 July 2026, air quality conditions in Pomona will be similar to today, with AQI forecast at fair at 29.9/100. Pollution peaks around 9:00 AM (O3: 29.9/100).
When is air pollution at its worst in Pomona?
Pomona's air quality follows a clear seasonal pattern. Typically, the cleanest air usually comes in winter, when storms periodically flush pollution out of the basin, while from August into October, wildfire smoke can add sharp particulate spikes on top of the usual summer ozone. Coastal breezes offer some relief compared to inland valley locations that see heavier smog buildup.
Are air quality levels in Pomona 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.
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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