空气质量

Air Quality Index (AQI): Particle Pollution

Index Values 0-50 51-100* 101-150

Levels of Health Concern Good Moderate Unhealthy for Sensitive Groups

Cautionary Statements

None

Unusually sensitive people should consider reducing

prolonged or heavy exertion. 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.

151-200 Unhealthy

201-300 Very Unhealthy

301-500 Hazardous

*An AQI of 100 for particles up to 2.5 micrometers in diameter corresponds to a level of 40 micrograms per cubic meter (averaged over 24 hours). An AQI of 100 for particles up to 10 micrometers in diameter corresponds to a level of 150 micrograms per cubic meter (averaged over 24 hours).

Air Quality Index (AQI): Carbon Monoxide (CO)

Index Values 0-50 51-100* 101-150

Levels of Health Concern Good Moderate Unhealthy for Sensitive

Groups

Cautionary Statements 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.

151-200 Unhealthy

201-300 Very Unhealthy

301-500

z

Hazardous

An AQI of 100 for carbon monoxide corresponds to a CO level of 9 parts per million (averaged over 8 hours).

Air Quality Index (AQI): Sulfur Dioxide (SO2)

Index Values 0-50

Levels of Health Concern Good

Cautionary Statements None