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. 2020 Jun 30;742:140556. doi: 10.1016/j.scitotenv.2020.140556

Table 1.

Pollutant concentration limits.

IAQI SO2 (24-h average, μg/m3) SO2 (1-h average, μg/m3) NO2 (24-h average, μg/m3) NO2 (1-h average, μg/m3) PM10 (24-h average, μg/m3) CO (24-h average, mg/m3) CO (1-h average, mg/m3) O3 (1-h average, μg/m3) O3 (8-h average, μg/m3) PM2.5 (24-h average, μg/m3)
0 0 0 0 0 0 0 0 0 0 0
50 50 150 40 100 50 2 5 160 100 35
100 150 500 80 200 150 4 10 200 160 75
150 475 650 180 700 250 14 35 300 215 115
200 800 800 280 1200 350 24 60 400 265 150
300 1600 / 565 2340 420 36 90 800 800 250
400 2100 / 750 3090 500 48 120 1000 / 350
500 2620 / 940 3840 600 60 150 1200 / 500