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Best Air Quality ZIP Codes in Illinois
Top 50 best air quality zip codes in america in Illinois. ZIP-level data from EPA Air Quality Index.
Rankings for Illinois will be available when EPA Air Quality Index data is refreshed. In the meantime, see the national best air quality zip codes in america ranking.
Methodology
This ranking is based on EPA Air Quality Index data, scoped to Illinois ZIP codes. Up to 50 ZIP codes are listed, ordered by median aqi. Data is refreshed periodically. See our methodology page for full details on data sources and update frequency.