Insights: Pittsburgh, PA metro. Aggregated EPA AQS monitors across this Core-Based Statistical Area logged a median Air Quality Index of 52 over 212 measured days in 2025, which corresponds to a Moderate band and a Poor metro-wide health grade. The monitored-day split lands at 96 Good days (45%), 113 Moderate (53%), and 3 Unhealthy-for-Sensitive-Groups (1%). The 90th-percentile AQI finished at 80 while the highest single-day reading hit 131 (USG). Metro residents averaged roughly 13.6 clean-air days per 30-day window across the reporting year.

Across the 2020–2025 trend window, good days shifted by -17 and the median AQI moved -3 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 Atlanta-Sandy Springs-Roswell, GA (45.3% good, AQI 52); El Dorado, AR (44.0% good, AQI 52); Greeley, CO (42.7% good, AQI 52).