PM_2.5.

PM₁₀

SO₂

CO

NO₂

O₃

污染物级别划分

≤0.035

≤0.050

≤0.050

≤2.000

≤0.040

≤0.100

I级

0.035~0.075

0.050~0.150

0.050~0.150

2.000~4.000

0.040~0.080

0.100~0.160

II级

0.075~0.115

0.150~0.250

0.150~0.475

4.000~14.00

0.080~0.180

0.160~0.215

III级

0.115~0.150

0.250~0.350

0.475~0.800

14.00~24.00

0.180~0.280

0.215~265

IV级

0.150~0.250

0.350~0.450

0.800~1.60

24.00~26.00

0.280~0.565

0.265~0.800

V级

≥0.250

≥0.420

≥1.60

≥36.00

≥0.565

≥0.800

VI级