Air pollution statistics for Ashtabula 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 | 90.53% | 7.24% | 2.23% | 0.00% |
| 1998 | 85.67% | 11.29% | 2.75% | 0.28% |
| 1999 | 85.40% | 12.12% | 2.48% | 0.00% |
| 2000 | 92.05% | 7.12% | 0.55% | 0.27% |
| 2001 | 86.26% | 10.71% | 2.47% | 0.55% |
| 2002 | 86.03% | 6.58% | 6.58% | 0.82% |
| 2003 | 90.96% | 7.40% | 1.10% | 0.55% |
| 2004 | 92.29% | 6.89% | 0.83% | 0.00% |
| 2005 | 87.85% | 10.22% | 1.93% | 0.00% |
| 2006 | 89.78% | 9.12% | 1.10% | 0.00% |
| 2007 | 88.57% | 10.29% | 1.14% | 0.00% |