Los Angeles, CA Air Quality
Report & Trends
Analysis & History
The Verdict
Compared to other metro areas, Los Angeles, CA scores poorly.
Plan your outdoor activities carefully in July, the statistical peak for AQI spikes in CA.
Health Recommendation
Sensitive groups should consider monitoring daily forecast apps significantly closer.
10-Year Annual PM2.5 Average
Analysis: Annual average Median AQI from 2015 to 2025.
With a median PM2.5 score of 78, Los Angeles, CA residents frequently face "Moderate" to "Unhealthy" air days. Despite seasonal fluctuations, year-over-year averages have remained consistent.
Seasonal Risk Calendar
The "Smoke Season" Calendar
Values represent historical Average Monthly AQI (PM2.5). Higher is worse.
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Common Questions
When is the worst time for air quality in Los Angeles, CA?
Based on 10 years of data, the worst months for air quality in Los Angeles, CA are: July (AQI 157.7), August (AQI 140.8), September (AQI 125.5). These months typically see the highest concentrations of PM2.5 due to smoke from fires hundreds of miles away.
Is it safe to move to Los Angeles, CA given the air quality?
Yes, but with caveats. Los Angeles, CA offers an incredible quality of life, but new residents should be aware of the "smoke season." Most homes in the area need robust air filtration systems to maintain safe indoor levels during these few weeks a year.
How is the air quality changing in Los Angeles, CA?
It is holding steady. While some seasons see short-term spikes, the long-term annual average for Los Angeles, CA has remained consistent over the last decade, avoiding the sharp declines seen in other parts of the region.
Do I really need an air purifier in Los Angeles, CA?
Based on the 10-year analysis, absolutely. The levels of PM2.5 recorded during peak events are unsafe for indoor occupation without filtration. A CADR-rated purifier is considered essential appliance for Los Angeles, CA households.
How accurate is this data?
This report is built on official EPA Air Quality System (AQS) data. We aggregated daily summary files from 2014 to present to build these charts. Unlike real-time apps that estimate, this is the verified historical record.
Is Los Angeles, CA safe from other disasters?
Air quality is just one factor. Check our sister site for a complete analysis of tornado, hurricane, and flood risks.
Full Safety Report →Summary
Knowledge is safety. Now that you see the seasonal patterns, you can prepare your home before the sky turns orange.