Atmospheric PM_2.5 Concentration Prediction Based on Time Series and Interactive Multiple Model Approach

Table 1

Air quality standard based on ambient air quality index (AQI).

AQI	Air quality index level	Air quality index category	Health implications
0∼50	Level 1	Excellent	No air pollution
50∼100	Level 2	Good	Air quality is acceptable
100∼150	Level 3	Slight pollution	Symptoms of irritation appear
150∼200	Level 4	Moderate pollution	Respiratory system is affected
200∼300	Level 5	Heavy pollution	Symptoms of patients increase
>300	Level 6	Severe pollution	Diseases appear