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As of July 16, 2026, Austin has the cleanest air among major tracked US cities (AQI 43) and Chicago the most polluted (AQI 165).
Last updated July 16, 2026 · Open-Meteo Air Quality API (US AQI). Refreshed several times daily.
AQI 43 (Good)
Austin currently has the cleanest air among major tracked US cities, with an AQI of 43 (Good).
Source: Open-Meteo Air Quality API · as of July 16, 2026
AQI 165 (Unhealthy)
Chicago currently has the most polluted air among major tracked US cities, with an AQI of 165 (Unhealthy).
Source: Open-Meteo Air Quality API · as of July 16, 2026
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CodeOpx tracks live air quality for 49 major US cities.
Source: CodeOpx AQI tracker · as of July 16, 2026
Austin currently has the cleanest air among major tracked US cities, with an AQI of 43 (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.