AQI Guide

Color White Green Yellow Orange Red Purple Dark Red
PM2.5 Level (μg/m3) Sensor Inactive 0-50 51-100 101-150 >151-200 201-300 >300
Advice to general public No restrictions on outdoor activities. No restrictions on outdoor activities. Any person who is not feeling well, consider reducing outdoor activities. Any person who is not feeling well, should reduce physical exertion. Everyone should limit outdoor exertion. Hazardous.
Advice to sensitive groups No restrictions on outdoor activities. Those with respiratory and cardiovascular diseases should reduce outdoor activities. Those with respiratory and cardiovascular diseases should reduce physical exertion. Those with respiratory and cardiovascular diseases should avoid outdoor activities altogether. Avoid all activity outdoors. Hazardous.