Air pollution statistics for Logan Co, Ohio
3. Select a year
| Year | Percentage days with good air | Percentage days with moderate air | Percentage days with unhealthy air for sensitive groups | Percentage days with unhealthy air |
| 1997 | 86.45% | 11.21% | 2.34% | 0.00% |
| 1998 | 83.18% | 15.89% | 0.93% | 0.00% |
| 1999 | 86.67% | 12.38% | 0.95% | 0.00% |