| Cautionary Health Statements By Air Quality Index (AQI) Category | ||||||
| Pollutant | Good | Moderate | Unhealthy for Sensitive Groups | Unhealthy | Very Unhealthy | Hazardous |
| Ozone | None | Usually sensitive people should consider reducing prolonged or heavy exertion outdoors. | Active children and adults, and people with lung disease, such as asthma, should reduce prolonged or heavy exertion outdoors. | Active children and adults, and people with lung disease, such as asthma, should avoid prolonged or heavy exertion outdoors. Everyone else, especially children, should reduce prolonged or heavy exertion outdoors. | Active children and adults, and people with lung disease, such as asthma, should avoid all outdoor exertion. Everyone else, especially children, should avoid prolonged or heavy exertion outdoors. | Everyone should avoid all physical activity outdoors. |
| Particulate
(PM-10 and PM-2.5) |
None | Usually sensitive people should consider reducing prolonged or heavy exertion outdoors. | People with heart or lung disease, older adults, and children should reduce prolonged or heavy exertion. | People with heart or lung disease, older adults, and children should avoid prolonged or heavy exertion. Everyone else should reduce prolonged or heavy exertion. | People with heart or lung disease, older adults, and children should avoid all physical activity outdoors. Everyone else should avoid prolonged or heavy exertion. | People with heart or lung disease, older adults, and children should remain indoors and keep activity levels low.. Everyone else should avoid all physical activity outdoors. |
| Carbon Monoxide | None | None | People with heart disease, such as angina, should reduce heavy exertion and avoid sources of CO, such as heavy traffic. | People with heart disease, such as angina, should reduce moderate exertion and avoid sources of CO, such as heavy traffic. | People with heart disease, such as angina, should avoid exertion and sources of CO, such as heavy traffic. | People with heart disease, such as angina, should avoid exertion and sources of CO, such as heavy traffic. Everyone else should reduce heavy exertion. |
| Sulfur Dioxide | None | None | People with asthma should consider reducing exertion outdoors. | Children, asthmatics, and people with heart or lung disease should reduce exertion outdoors. | Children, asthmatics, and people with heart or lung disease should avoid outdoor exertion. Everyone else should reduce exertion outdoors. | Children, asthmatics, and people with heart or lung disease should remain indoors. Everyone else should avoid exertion outdoors. |