Air pollution statistics for Caldwell 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 |
| 1999 | 78.95% | 21.05% | 0.00% | 0.00% |
| 2000 | 90.80% | 9.20% | 0.00% | 0.00% |
| 2001 | 92.80% | 7.20% | 0.00% | 0.00% |
| 2002 | 86.62% | 11.97% | 1.41% | 0.00% |
| 2003 | 90.00% | 10.00% | 0.00% | 0.00% |