Table 2.

The scatter plot of AQI in Urumqi in 2022.

Contaminant	PM2.5	PM10	NO2	SO2	CO	O3
PM2.5	1
PM10	0.990**	1
NO2	0.971**	0.978**	1
SO2	0.938**	0.958**	0.981**	1
CO	0.991**	0.974**	0.970**	0.950**	1
O3	−0.779**	−0.748**	−0.754**	−0.760**	−0.831**	1

** is significantly correlated at the 0.01 level.