PM

24-hour PM concentrations (μg∙m⁻³)

Scholar sites

Peripheral district sites

Industrial sites

Roadside sites

Administrative sites

Recommended limits

PM₁

6 ± 1

12 ± 3

14 ± 6

14 ± 4

13 ± 5

-

PM_2.5

6 ± 1

24 ± 5

29 ± 14

25 ± 5

25 ± 9

25^a, 35^b

PM₁₀

23 ± 11

281 ± 154

263 ± 156

195 ± 77

171 ± 95

50^a,c, 150^b