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Worst Air Quality ZIP Codes in America
Ranked list of ZIP codes with the worst air quality in the US by median AQI.
Rankings will be available when EPA Air Quality Index data is refreshed. Check back soon — or explore the Environment overview.
Methodology
This ranking is based on EPA Air Quality Index data. ZIP codes are ranked by median aqi, with a maximum of 3 ZIP codes per state to keep the ranking geographically diverse. Data is refreshed periodically. See our methodology page for full details on data sources and update frequency.
See rankings by state
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