Air quality in Los Angeles today, Wednesday, November 12, 2025, ranges from good to moderate across most regions. According to data from the South Coast Air Quality Management District, central Los Angeles County is experiencing a moderate Air Quality Index, or AQI, of 79, primarily due to fine particulate matter known as PM2.5. Northwest and Southwest coastal areas both have a moderate AQI of 69 and 66 respectively, also driven by PM2.5 levels. The Santa Clarita Valley and Antelope Valley report slightly lower AQI values of 56 and 58, still within the moderate category. Nearby mountain regions such as the San Bernardino Mountains are reporting good air quality, with AQIs in the low 40s.
A "moderate" AQI, defined as a value between 51 and 100, means that air quality is generally acceptable, but there may be a minor concern for a very small number of individuals who are particularly sensitive to air pollution, such as those with pre-existing respiratory conditions. For the rest of the population, air quality poses little or no risk.
The main pollutant contributing to the AQI today in Los Angeles is PM2.5, or fine particulate matter. These microscopic particles originate from vehicles, industrial emissions, and natural sources like wildfires. PM2.5 can penetrate deep into the lungs and potentially impact heart and lung health, particularly for vulnerable groups.
Ozone levels remain low throughout the region today, meaning smog is not a significant concern. No widespread air quality alerts are in place. The forecast indicates similar air conditions throughout the day, so outdoor activities remain safe for most people. However, sensitive individuals should continue to monitor changes and reduce strenuous outdoor activity if experiencing symptoms.
Recent atmospheric conditions, including a notable geomagnetic storm that made headlines with rare northern lights displays, have not negatively affected ground-level air quality in the Los Angeles Basin. Residents can enjoy typical fall activities, with only minimal air quality restrictions in effect for a small fraction of the population. Today’s air remains typical for the season, with regional variations consistent with historical patterns for this time of year[1][3][4].
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