United States

San Diego

Name: San Diego
Address: United States

Good

Air Quality Index

Updated Mar 20, 11:56 PM · Data from OpenAQ

Current Pollution Levels in San Diego

PM2.5

Good

9.1

µg/m³

PM10

Good

µg/m³

O₃

—

0.06

ppm

San Diego Air Quality 24-Hour Trend

Air Quality Analysis for San Diego

San Diego, United States air quality this morning is rated Good with an Air Quality Index (AQI) of 38. The primary pollutant PM2.5 is measured at 9.1 µg/m³. PM10 (coarse particles) is at 29 µg/m³.

The current PM2.5 level is within WHO air quality guidelines, indicating relatively clean air conditions in San Diego today.

PM2.5 levels are stable, staying close to the recent average of 9.1 µg/m³.

Health Recommendation

Air quality in San Diego is excellent. All outdoor activities are safe. Perfect conditions for jogging, cycling, and outdoor sports.

Outdoor Exercise

Ideal conditions

Window Ventilation

Recommended

Recent San Diego Air Quality Measurements

Time	AQI	PM2.5	PM10
11:56 PM	38	9.1	29

Frequently Asked Questions

Is air quality in San Diego safe today?

Yes, San Diego air quality is currently good with an AQI of 38. Outdoor activities are safe for everyone.

What AQI level is considered unhealthy?

According to EPA standards, AQI 0-50 is Good, 51-100 is Moderate, 101-150 is Unhealthy for Sensitive Groups, 151-200 is Unhealthy, 201-300 is Very Unhealthy, and above 300 is Hazardous. The WHO recommends annual PM2.5 levels below 15 µg/m³ for optimal health.

Should I wear a mask today in San Diego?

With San Diego's current AQI of 38, masks are generally not necessary for most people. However, if you have respiratory conditions, a mask may provide additional comfort.