San Diego vs Portland

Live AQI Comparison

Updated 3h ago · Data from OpenAQ

San Diego

United States

Good

PM2.59.1 µg/m³

PM1029 µg/m³

Portland

United States

Good

PM2.53.7 µg/m³

PM10—

Verdict

San Diego currently has worse air quality than Portland (AQI 23 points higher). Both cities have acceptable air quality levels.

San Diego vs Portland Air Quality Analysis

Based on the latest measurements, San Diego has an AQI of 38 compared to Portland's AQI of 15. The World Health Organization (WHO) recommends annual PM2.5 levels below 15 µg/m³ and 24-hour levels below 45 µg/m³.

PM2.5 levels in both cities are within WHO guidelines. Outdoor activities can be enjoyed without air quality concerns.

Air quality can change rapidly due to weather patterns, traffic, and industrial activity. Check back hourly for the latest comparison between San Diego and Portland.

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Frequently Asked Questions

Which city has worse air quality today, San Diego or Portland?

San Diego currently has worse air quality with an AQI of 38 compared to Portland's AQI of 15. This data is updated hourly from government monitoring stations.

Is it safer to be in San Diego or Portland right now?

Based on current AQI levels, Portland (AQI 15) has safer air quality than San Diego (AQI 38). Both cities have acceptable air quality for outdoor activities.

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