San Diego vs Visalia 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 Visalia, CA — AQI 34 (Good) vs 66 (Moderate), a gap of 32 AQI points in the latest EPA AirNow observations. Lower AQI means cleaner air. San Diego's reading is driven by O3 and Visalia's by PM2.5.

San Diego, CA

Good

StateCalifornia
Dominant PollutantO3
CategoryGood
View full details →

Visalia, CA

Moderate

StateCalifornia
Dominant PollutantPM2.5
CategoryModerate
View full details →

Summary

San Diego has 32 points better air quality

San Diego has an AQI of 34 compared to 66

Our Pick

Extra Protection for Visalia Homes

Air quality in Visalia is moderate (AQI 66), 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
Check Price on Amazon →

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 DiegoVisaliaBetter
TodayAQI 54AQI 94San Diego

Compare Other Cities

San Diego vs Los AngelesSan Diego vs San FranciscoSan Diego vs San JoseSan Diego vs FresnoSan Diego vs SacramentoSan Diego vs BakersfieldSan Diego vs RiversideSan Diego vs Oakland