San Diego, California vs Los Angeles, California Air Quality
Side-by-side air quality comparison using 10 years of EPA monitoring data. Both cities have identical Air Quality Grades.
| Metric | San Diego, California | Los Angeles, California |
|---|---|---|
| Air Quality Grade | D (36/100) | D (36/100) |
| Current Median AQI | 67 (Moderate) | 67 (Moderate) |
| 5-Year Average AQI | 67 | 75 |
| 10-Year Trend | → Stable (+2) | ↓ Improving (-15) |
| Unhealthy Days/Year | 32 | 100 |
| Primary Pollutant | Fine Particulate Matter (PM2.5) | Fine Particulate Matter (PM2.5) |
Analysis
Both cities have comparable air quality profiles with identical grades. The key difference is in trend direction and pollutant mix.
Frequently Asked Questions
San Diego, California and Los Angeles, California have identical Air Quality Grades. Both score 36/100 based on 10 years of EPA data.
San Diego, California averages 32 unhealthy air days per year (5-year average), while Los Angeles, California averages 100. Unhealthy days are those when AQI exceeds 100 and sensitive groups should limit outdoor activity.
San Diego, California's primary pollutant is Fine Particulate Matter (PM2.5), while Los Angeles, California's is Fine Particulate Matter (PM2.5). Both cities share the same dominant pollutant.