Insights: Glenwood Springs, CO metro. Aggregated EPA AQS monitors across this Core-Based Statistical Area logged a median Air Quality Index of 49 over 366 measured days in 2024, which corresponds to a Good band and a Moderate metro-wide health grade. The monitored-day split lands at 212 Good days (58%), 149 Moderate (41%), and 5 Unhealthy-for-Sensitive-Groups (1%). The 90th-percentile AQI finished at 74 while the highest single-day reading hit 133 (USG). Metro residents averaged roughly 17.4 clean-air days per 30-day window across the reporting year.

Across the 2020–2024 trend window, good days shifted by -20 and the median AQI moved +1 points, which classifies the multi-year trajectory as worsening. 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 Boulder, CO (57.9% good, AQI 49); Carlsbad-Artesia, NM (51.4% good, AQI 49); Colorado Springs, CO (55.2% good, AQI 49).