PM_2.5 annual (µg/m³)

PM_2.5 24-hour (µg/m³)

Management Level & Action

2015

2020

2015

2020

Threshold Values

10

8.8

28

27

Action needed for achieving CAAQS Air Zone

6.4

19

Action for Preventing CAAQS Exceedance

4

10

Action Preventing Deterioration of Air Quality

<4

<10

Actions for Maintaining and Keeping Clean Air Zones