Table 2

Pearson correlation coefficients among air pollutants

Air pollutantsPM2.5 PM10 PM10- 2.5 SO2 NOxCOO3
PM2.5 1.000.93*0.69*0.50*0.10*0.09*<0.01
PM10 1.000.91*0.54*0.09*0.08*0.05*
PM10-2.5 1.000.50*0.05*0.06*0.11*
SO2 1.000.35*0.33*−0.18*
NOx1.000.95*−0.67*
CO1.00−0.66*
O3 1.00
  • *P<0.05.