DOE: API readings based on 24-hour average

PETALING JAYA: The Department of Environment (DOE) has cleared the air on Saturday’s Air Pollutant Index (API) readings for the Klang Valley, reiterating that readings are based on a 24-hour average.

In a statement on Sunday, the department said that certain areas in the Klang Valley did not post unhealthy air quality readings on Saturday as the average value of Particulate Matter – the fine dust that causes haze – for the past 24 hours was below 150 microgram per cubic metre and fell between the moderate range.