San Diego vs Long Beach 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 Long Beach, CA — AQI 34 (Good) vs 51 (Moderate), a gap of 17 AQI points in the latest EPA AirNow observations. Lower AQI means cleaner air. San Diego's reading is driven by O3 and Long Beach's by PM2.5.

San Diego, CA

Good

StateCalifornia
Dominant PollutantO3
CategoryGood
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Long Beach, CA

Moderate

StateCalifornia
Dominant PollutantPM2.5
CategoryModerate
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Summary

San Diego has 17 points better air quality

San Diego has an AQI of 34 compared to 51

Our Pick

Extra Protection for Long Beach Homes

Air quality in Long Beach is moderate (AQI 51), 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
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Editor's Pick
Levoit Vital 200S
True HEPA
True HEPA · washable pre-filter · rooms up to 1,875 sq ft
~$2004.6
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Budget Pick
Levoit Core 400S
True HEPA
True HEPA · CADR ~141 CFM · rooms up to 219 sq ft
~$1004.7
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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 DiegoLong BeachBetter
TodayAQI 54AQI 53Long Beach

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