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Best Air Quality ZIP Codes in Washington
Top 50 best air quality zip codes in america in Washington. ZIP-level data from EPA Air Quality Index.
Rankings for Washington 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 Washington 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.