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A graded mask-and-particle panel.
Also known as: Fine dust alert Korea, Air quality grade Korea
The Korean public alert marking air quality by fine particulate grade, from good to very bad.
States the current fine particulate air quality grade.
Contexts: Public information
Uses four grades rather than the six of the international AQI, and its thresholds are set higher, so a Korean grade and an AQI band describing the same air do not agree; the difference has been publicly argued over and the thresholds were tightened in 2018.
Contexts: Public information
A panel carrying a face with a covering over the mouth beside a scatter of small dots, set against one of four graded ground tones.