pollutant,Sun-Thu,Fri-AM,Fri-PM,Sat
Benzene,0.28,0.22,0.2,0.19
NO,20.3,15.64,6.34,5.79
NO2,19.27,14.91,12.44,9.7
NOX,39.58,30.55,18.78,15.49
PM2.5,22.95,23.85,28.5,33.15
Toluene,0.99,0.57,0.52,0.47