A Multiple Kernel Learning Approach for Air Quality Prediction

Table 17

PM2.5 AQI of mainland China.

IAQI score	Description	PM2.5 concentration (μg/m^3)
0–50	Excellent	0–35
51–100	Good	35–75
101–150	Lightly polluted	75–115
151–200	Moderately polluted	115–150
201–300	Heavily polluted	150–250
301–500	Severely polluted	250–500