Insights: Kingsport-Bristol-Bristol, TN-VA metro. Aggregated EPA AQS monitors across this Core-Based Statistical Area logged a median Air Quality Index of 42 over 220 measured days in 2025, which corresponds to a Good band and a Good metro-wide health grade. The monitored-day split lands at 172 Good days (78%), 48 Moderate (22%), and 0 Unhealthy-for-Sensitive-Groups (0%). The 90th-percentile AQI finished at 56 while the highest single-day reading hit 90 (Moderate). Metro residents averaged roughly 23.5 clean-air days per 30-day window across the reporting year.

Across the 2020–2025 trend window, good days shifted by -136 and the median AQI moved +5 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 Albany-Schenectady-Troy, NY (66.3% good, AQI 42); Bismarck, ND (75.8% good, AQI 42); Bloomington, IN (70.1% good, AQI 42).