Air pollution statistics for Bexar Co, Texas
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 | 90.33% | 8.84% | 0.83% | 0.00% |
| 1998 | 84.93% | 12.88% | 1.92% | 0.27% |
| 1999 | 81.10% | 16.16% | 2.74% | 0.00% |
| 2000 | 81.15% | 18.03% | 0.82% | 0.00% |
| 2001 | 81.10% | 18.63% | 0.27% | 0.00% |
| 2002 | 75.89% | 19.45% | 3.84% | 0.82% |
| 2003 | 75.07% | 22.19% | 2.47% | 0.27% |
| 2004 | 84.15% | 13.93% | 1.91% | 0.00% |
| 2005 | 77.26% | 21.64% | 1.10% | 0.00% |
| 2006 | 73.70% | 25.21% | 1.10% | 0.00% |
| 2007 | 80.75% | 18.78% | 0.00% | 0.47% |