| 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 |