This table shows the status of the Louisville metropolitan statistical area in attainment of national ambient air quality standards (NAAQS).
| Standard | Averaging Time | Attainment Status |
|---|---|---|
| Carbon Monoxide | ||
| 9 ppm | 8-hour | Attainment |
| 35 ppm | 1-hour | Attainment |
| Lead | ||
| 0.15 µg/m3 | Rolling 3-Mo Average | Attainment |
| Nitrogen Dioxide | ||
| 0.053 ppm | Annual Average | Attainment |
| 0.10 ppm | 1-hour | Attainment |
| Ozone | ||
| 0.070 ppm | 8-hour | Nonattainment |
| Particulate Matter (PM10) | ||
| 150 µg/m3 | 24-hour | Attainment |
| Particulate Matter (PM2.5) | ||
| 12.0 µg/m3 | Annual Average | Attainment |
| 35 µg/m3 | 24-hour | Attainment |
| Sulfur Dioxide | ||
| 0.75 ppm | 1-hour | Partial Nonattainment |
| 0.5 ppm | 3-hour | Attainment |