Air pollution statistics for Dukes Co, Massachusetts
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 |
| 2003 | 88.00% | 12.00% | 0.00% | 0.00% |
| 2004 | 91.74% | 8.26% | 0.00% | 0.00% |
| 2005 | 86.67% | 11.11% | 1.67% | 0.56% |
| 2006 | 90.86% | 6.86% | 1.14% | 1.14% |
| 2007 | 88.04% | 8.70% | 3.26% | 0.00% |