Air Quality Guide to Particle (PM 2.5) Pollution
AQI (Air Quality Index) |
AQI Category |
Cautionary Statement |
Health Statement |
0-50 |
Good |
None |
None |
51-100 |
Moderate |
Unusually sensitive people should consider reducing prolonged or heavy exertion. |
None |
101-150 |
Unhealthy for Sensitive Groups |
People with respiratory or heart disease, the elderly, and children should limit prolonged exertion. |
Increasing likelihood of respiratory symptoms in sensitive individuals, aggravation of heart or lung disease and premature mortality in persons with cardiopulmonary disease and the elderly. |
151-200 |
Unhealthy |
People with respiratory or heart disease, the elderly, and children should avoid prolonged exertion; everyone else should limit prolonged exertion. |
Increased aggravation of heart or lung disease and premature mortality in persons with cardiopulmonary disease and the elderly: increased respiratory effects in general population. |
201-300 |
Very Unhealthy |
People with respiratory or heart disease, the elderly, and children should avoid outdoor activity; everyone else should avoid prolonged exertion. |
Significant aggravation of the heart or lung disease and premature mortality in persons with cardiopulmonary disease and the elderly: significant increase in respiratory effects in the general population. |
301-500 |
Hazardous |
Everyone should avoid any outdoor exertion; people with respiratory or heart disease; the elderly and children should remain indoors. |
Significant aggravation of heart or lung disease and premature mortality in persons with cardiopulmonary disease and the elderly: significant increase in respiratory effects in the general population. |