AIR QUALITY • AMERICAS

Air Quality in United States

Explore the cities currently included in the AirQualityIndex.org global air-quality catalogue for United States.

5 covered citiesAmericas region
Coverage note: This page is a directory of locations covered by the site's current catalogue. It does not imply that every city or monitoring station in United States is represented. Individual city pages identify the source, update time and whether displayed information is model-based or monitoring-station data.

Cities covered

Air-quality data and methodology

City pages may present atmospheric-model estimates and, where configured, nearby monitoring-station information. The source and update time are shown on each city page so readers can distinguish model estimates from observations.

For an explanation of AQI systems and pollutant measurements, visit Air Quality Explained. To calculate an index from pollutant concentrations, use the AQI Calculator.

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