SO2

NO2

CO

O3

PM2.5

PM10

East

0.92

0.96

0.95

−0.450

0.996

0.974

Middle

0.93

0.84

0.89

0.091

0.999

0.992

West

0.95

0.58

0.87

−0.167

0.997

0.978

Northeast

0.92

0.86

0.97

−0.536

0.993

0.992