Updated every hour

Air quality in Pomona

The Pomona Valley can trap smog and wildfire smoke against the foothills. Here's today's reading and what it means for your plans.

U.S. Air Quality Index

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Data: Open-Meteo air quality model (CAMS). Modeled values can differ from official monitors — for alerts, check the South Coast AQMD.

Local tips

Mornings are cleaner
Ozone builds through summer afternoons. Run or ride before 10am.
Santa Ana winds
Dry offshore winds often clear smog but raise fire risk and dust. Watch for red-flag warnings.
Smoke days
If AQI climbs past 150, keep windows shut and consider indoor plans like the Western University museum or a movie downtown.