|
Air
Quality Index
Levels of Health Concern
|
Color |
Numerical
Value
|
Meaning
|
| Good |
Green |
0-50 |
Air quality is considered satisfactory,
and air pollution poses little or no risk. |
| Moderate |
Yellow |
51-100 |
Air quality is acceptable; however,
for some pollutants there may be a moderate health
concern for a very small number of people who are
unusually sensitive to air pollution. |
Unhealthy
for
Sensitive Groups |
Orange |
101-150 |
Members of sensitive groups may experience
health effects. The general public is not likely
to be affected. |
| Unhealthy |
Red |
151-200 |
Everyone may
begin to experience health effects; members of
sensitive groups may experience more serious health
effects. |
| Very Unhealthy |
Purple |
201-300 |
Health alert:
everyone may experience more serious health effects. |
| Hazardous |
Maroon |
> 300 |
Health
warnings of emergency conditions. The entire population
is more likely to be affected. |
