| Month | AQI | Health quality |
| Feb. | 184 | Unhealthy |
| March | 230 | Very unhealthy |
| April | 176 | Unhealthy |
| May | 162 | Unhealthy |
| June | 164 | Unhealthy |
| July | 152 | Unhealthy |
| September | 110 | Unhealthy for sensitive groups |
| October | 99 | Moderate |
| November | 89 | Moderate |
| December | 110 | Unhealthy for sensitive groups |
| Jan. 2013 | 105 | Unhealthy for sensitive groups |