The AQI is divided into six color-coded categories, each representing a different level of health concern. Green (0-50) indicates good air quality, while yellow (51-100) is moderate, posing minimal risk to most people. Orange (101-150) is unhealthy for sensitive groups, such as those with asthma or heart conditions. Red (151-200) is unhealthy for everyone, and purple (201-300) is very unhealthy. Maroon (301 and above) represents hazardous air quality, where everyone is at risk of adverse health effects.