Understanding the Air Quality Index (AQI)
The Air Quality Index (AQI) is a tool used to communicate how polluted the air currently is or how polluted it is forecast to become. Here’s how to interpret AQI data and what it means for your health:
What is AQI?
The AQI is a scale that runs from 0 to 500. The higher the AQI value, the greater the level of air pollution and the greater the health concern.
AQI Categories
- 0-50 (Good): Air quality is satisfactory, and air pollution poses little or no risk.
- 51-100 (Moderate): Air quality is acceptable; however, some pollutants may be a moderate health concern for a very small number of people.
- 101-150 (Unhealthy for Sensitive Groups): Members of sensitive groups may experience health effects.
- 151-200 (Unhealthy): Everyone may begin to experience health effects.
- 201-300 (Very Unhealthy): Health warnings of emergency conditions.
- 301+ (Hazardous): Health alert: everyone may experience more serious health effects.
How to Use AQI Data
Check the AQI for your area regularly and take precautions when the AQI is high. Limit outdoor activities, use air purifiers, and wear masks if necessary.