Air Quality Index (AQI) Values

Levels of Health Concern

Health Concern & Meanings

0 - 50

Good

There is little risk and the air is not polluted. People are satisfied with this level of air quality.

51 - 100

Moderate

Most people find the air acceptable, yet a few people may worry that some pollutants in the air will cause health problems.

101 - 150

Unhealthy for Sensitive Groups

General people will not be seriously affected by this level of air quality, while people with lung disease are exposed with greater risks, along with aged people and youngsters.

151 - 200

Unhealthy

Air quality of this level poses threats to physical health of everyone, and the sensitive groups face greater risks.

201 - 300

Very Unhealthy

The health condition of every people will be seriously affected by the mixture of pollutants in the air.

301 - 500

Hazardous

The air quality is intolerant for the entire population, which will causes critical health warnings.