Insights: Coeur d'Alene, ID metro. Aggregated EPA AQS monitors across this Core-Based Statistical Area logged a median Air Quality Index of 24 over 181 measured days in 2025, which corresponds to a Good band and a Good metro-wide health grade. The monitored-day split lands at 160 Good days (88%), 21 Moderate (12%), and 0 Unhealthy-for-Sensitive-Groups (0%). The 90th-percentile AQI finished at 52 while the highest single-day reading hit 71 (Moderate). Metro residents averaged roughly 26.5 clean-air days per 30-day window across the reporting year.

Across the 2020–2025 trend window, good days shifted by -128 and the median AQI moved -2 points, which classifies the multi-year trajectory as improving. The metro avoided any Unhealthy-tier days entirely, an outcome that typically reflects favorable wind patterns, lower industrial density, or effective regional emission controls. Metros with comparable AQI profiles include Albany, OR (84.5% good, AQI 24); Moscow, ID (99.3% good, AQI 24); Pahrump, NV (91.2% good, AQI 24).