San Diego vs Fresno Air Quality Comparison

Which city has cleaner air right now, from the latest EPA AirNow AQI

As of November 8, 2026, San Diego, CA has cleaner air than Fresno, CA — AQI 34 (Good) vs 87 (Moderate), a gap of 53 AQI points in the latest EPA AirNow observations. Lower AQI means cleaner air. San Diego's reading is driven by O3 and Fresno's by PM2.5.

San Diego, CA

Good

StateCalifornia
Dominant PollutantO3
CategoryGood
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Fresno, CA

Moderate

StateCalifornia
Dominant PollutantPM2.5
CategoryModerate
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Summary

San Diego has 53 points better air quality

San Diego has an AQI of 34 compared to 87

Our Pick

Extra Protection for Fresno Homes

Air quality in Fresno is moderate (AQI 87), with fine particles (PM2.5) the main concern. A True-HEPA purifier gives sensitive groups — kids, seniors and anyone with asthma or allergies — cleaner air indoors on days like today.

Large Room4.6(8,000+ ratings)
Coway AP-1512HH Mighty
True HEPA + carbon · CADR ~246 CFM · rooms up to 361 sq ft
True HEPA + carbon, high CADR — clears PM2.5 from most rooms fast, our all-round pick
~$230
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Compare top-rated True-HEPA purifiers:

Large Room
Coway AP-1512HH Mighty
HEPA + Carbon
True HEPA + carbon · CADR ~246 CFM · rooms up to 361 sq ft
~$2304.6
Check Price on Amazon →
Editor's Pick
Levoit Vital 200S
True HEPA
True HEPA · washable pre-filter · rooms up to 1,875 sq ft
~$2004.6
Check Price on Amazon →
Budget Pick
Levoit Core 400S
True HEPA
True HEPA · CADR ~141 CFM · rooms up to 219 sq ft
~$1004.7
Check Price on Amazon →

Prices are approximate and subject to change. As an Amazon Associate, we earn from qualifying purchases at no extra cost to you.

5-Day Forecast Comparison

DaySan DiegoFresnoBetter
TodayAQI 54AQI 99San Diego

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