A New Air Quality Prediction Framework for Airports Developed with a Hybrid Supervised Learning Method

Table 2

IAQI breakpoints of different air pollutants.

IAQI	CO; 24-hour mean; (μg/m^3)	NO2; 24-hour mean; (μg/m^3)	SO2; 24-hour mean; (μg/m^3)	CO; 1-hour mean; (μg/m^3)	NO2; 1-hour mean; (μg/m^3)	SO2; 1-hour mean; (μg/m^3)
0	0	0	0	0	0	0
50	2	40	50	5	100	150
100	4	80	150	10	200	500
150	14	180	475	35	700	650
200	24	280	800	60	1200	800
300	36	565	1600	90	2340	1600
400	48	750	2100	120	3090	2100
500	60	940	2620	150	3840	2620