Insights: Austin-Round Rock, TX metro. Aggregated EPA AQS monitors across this Core-Based Statistical Area logged a median Air Quality Index of 53 over 244 measured days in 2025, which corresponds to a Moderate band and a Poor metro-wide health grade. The monitored-day split lands at 100 Good days (41%), 142 Moderate (58%), and 2 Unhealthy-for-Sensitive-Groups (1%). The 90th-percentile AQI finished at 71 while the highest single-day reading hit 126 (USG). Metro residents averaged roughly 12.3 clean-air days per 30-day window across the reporting year.

Across the 2020–2025 trend window, good days shifted by -82 and the median AQI moved +2 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 Beaumont-Port Arthur, TX (35.4% good, AQI 53); Detroit-Warren-Dearborn, MI (45.1% good, AQI 53); Hanford-Corcoran, CA (39.8% good, AQI 53).