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As of September 11, 2026, Tucson has the cleanest air among major tracked US cities (AQI 22) and Los Angeles the most polluted (AQI 74).
Last updated September 11, 2026 · Open-Meteo Air Quality API (US AQI). Refreshed several times daily.
AQI 22 (Good)
Tucson currently has the cleanest air among major tracked US cities, with an AQI of 22 (Good).
Source: Open-Meteo Air Quality API · as of September 11, 2026
AQI 74 (Moderate)
Los Angeles currently has the most polluted air among major tracked US cities, with an AQI of 74 (Moderate).
Source: Open-Meteo Air Quality API · as of September 11, 2026
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CodeOpx tracks live air quality for 49 major US cities.
Source: CodeOpx AQI tracker · as of September 11, 2026
Tucson currently has the cleanest air among major tracked US cities, with an AQI of 22 (Good). Source: Open-Meteo Air Quality API. Retrieved from CodeOpx, https://codeopx.com/stats/air-quality#cleanest-city
Licensed CC-BY 4.0 — free to reuse with attribution. Figures refresh automatically from the sources above; the anchor links are stable. Corrections: corrections@codeopx.com.