|
AQI Value |
Health Effect Descriptor |
Air Quality Level |
General Health Effects |
|
400 - 500 |
Hazardous Harm |
Significant |
Premature death of ill and elderly. Healthy people will experience adverse symptoms that affect their normal activity. All persons should remain indoors and minimize physical exertion. |
|
300 - 399 |
Hazardous |
Emergency |
Premature onset of certain diseases in addition to significant aggravation of symptoms and decreased exercise tolerance in healthy persons. Elderly and persons with existing diseases should avoid outdoor activity. |
|
200 - 299 |
Very Unhealthful |
Warning |
Significant aggravation of symptoms and decreased exercise tolerance in persons with heart or lung disease, with widespread symptoms in the healthy population. Elderly and persons with existing heart or lung disease should stay indoors and reduce physical activity. With regard to ozone, general population should minimize all outdoor activity. |
|
101 - 199 |
Unhealthful |
Alert |
Mild aggravation of symptoms in susceptible persons, with irritation symptoms in the healthy population. Persons with existing heart or respiratory ailments should reduce physical exertion and outdoor activity. With regard to ozone, general population should avoid vigorous activity. |
|
51 - 100 0 - 50 |
Moderate Good |
(No adverse health effects expected) | |
| Sources: Code of Federal Regulations, Title 40, Part 58, Appendix G; EPA-450/2-76--013, August 1976 | |||
Tablea-2.txt