AQI 52 · PM2.5 · Trend: Improving
| Average AQI | 52 |
| Good Days / Year | 205 |
| Unhealthy Days / Year | 12 |
| Primary Pollutant | PM2.5 |
| PM2.5 Average | 9.5 µg/m³ |
| Trend | ↓ Improving |
| Monitoring Stations | 28 |
| Nonattainment Areas | 1 |
Kentucky's air quality is affected by its coal dependence and Louisville's industrial corridor. The Ohio River valley traps pollution during inversions. Bourbon distillery ethanol emissions (the "angel's share") are a unique Kentucky air quality curiosity.
Kentucky Energy and Environment Cabinet Division for Air Quality manages standards. Louisville metro has enhanced monitoring. Vehicle emissions testing in some counties.
Louisville metro — PM2.5 and ozone nonattainment. Kentucky is heavily coal-dependent, though plant retirements are improving air quality.