|
OZONE
CAUTIONARY STATEMENT GUIDE
|
Air Quality
Index |
Cautionary Statements |
Health Effects Statements |
Air Quality Index (AQI)
|
Ozone Concentration
(parts per million) |
| Good |
No health impacts are expected when air quality is in this range. |
No health effects are expected when air quality is in this range. |
0 to 50 |
0.0 to 0.064 |
| Moderate |
Unusually sensitive people should consider limiting prolonged outdoor exertion. |
Unusually sensitive individuals may experience respiratory symptoms. |
51 to 100 |
0.065 to 0.084 |
| Unhealthy for Sensitive Groups |
Active children and adults, and people with respiratory disease, such as asthma,
should limit prolonged outdoor exertion. |
Increasing likelihood of respiratory symptoms and breathing discomfort in active
children and adults and people with respiratory disease, such as asthma. |
101 to 150 |
0.085 to 0.104 |
| Unhealthy |
Active children and adults, and people with respiratory disease, such as asthma,
should avoid prolonged or heavy outdoor exertion; everyone else, especially children,
should limit prolonged outdoor exertion. |
Greater likelihood of respiratory symptoms and breathing difficulty in active
children and adults and people with respiratory disease, such as asthma; possible
respiratory effects in general population. |
151 to 200 |
0.105 to 0.124
[8-hr]
or
0.165 to 0.204
[1-hr] |
| Very Unhealthy |
Active children and adults, and people with respiratory disease,
such as asthma, should avoid all outdoor exertion; everyone else, especially children,
should limit outdoor exertion. |
Increasingly severe symptoms and impaired breathing likely in active children and
adults and people with respiratory disease, such as asthma; increasing likelihood of
respiratory effects in general population. |
201 to 300 |
0.125 to 0.374
[8-hr]
or
0.205 to 0.404
[1-hr] |
| Hazardous |
Everyone should avoid all outdoor exertion. |
Severe respiratory effects and impaired breathing likely in active children and
adults and people with respiratory disease, such as asthma; increasingly severe
respiratory effects in general population. |
301 to 500 |
0.405 to 0.604
[1-hr] |
| Sensitive Groups: When the Ozone AQI
exceeds 100 the sensitive groups most at risk are children and people with asthma. |
