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Air Quality Index
Air Quality Index (AQI) Values
Level of Health Concern
Colors
0 to 50
Good
Green
51 to 100
Moderate
Yellow
101 to 150
Unhealthy for Sensitive Groups
Orange
151 to 200
Unhealthy
Red
201 to 300
Very Unhealthy
Purple
301 to 500
Hazardous
Maroon