How does the DOE define different levels of air quality?

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The Department of Environment Defines Air Quality Levels Based on API Readings

The Department of Environment (DOE) categorises air quality using the Air Pollutant Index (API), with specific numerical ranges assigned to different levels. As of October 31, most of Malaysia experienced air quality within the normal range, with only two locations, Bakar Arang and Port Klang, registering API readings slightly above the 'good' threshold at 52 and 51 respectively.
Good Air Quality

An API reading between 0 and 50 is classified by the DOE as indicating good air quality. This range signifies that air pollution levels are minimal and pose little to no risk to the public's health.
Moderate Air Quality

When the API reading falls between 51 and 100, the air quality is considered moderate. While this level is not yet considered unhealthy, individuals with unusual sensitivity to air pollution may experience some health effects.
Unhealthy Air Quality

An API reading of 101 to 200 signifies unhealthy air quality. At this level, members of the public, including sensitive groups, may experience more serious health effects.
Very Unhealthy Air Quality

The DOE designates API readings from 201 to 300 as very unhealthy. Air quality at this level poses significant health risks to everyone, and prolonged exposure should be avoided.
Hazardous Air Quality

Any API reading of 300 and above is classified as hazardous. This extreme level of air pollution presents a serious health threat to all individuals, and emergency health conditions are likely.

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How does the DOE define different levels of air quality?

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