This study presents short-term air quality trends based on API from the 52
air quality monitoring stations nationwide between 2010 and 2016. The air
quality data and meteorological conditions were obtained from the Department
of Environment and used for the API calculation. The API value is classified into
six categories, namely: Good (0-50), Moderate (51-100), Unhealthy (101-200),
Very Unhealthy (201-300), Hazardous (301-500), and Emergency (above 500).
The coefficient of variation (CV) and Mann-Kendall trend test (MK) were used to
assess the API variation and trend in each air quality monitoring station. Between
the study periods, the API values were largely varied. Observation at 32 air
quality monitoring stations have shown significant but small increasing trends,
while 12 stations showed significant decreasing trends, and the remaining 8
stations showed no significant trends. The frequency of exceedance (API>50)
was used to assess the percentages of unhealthy days.

Categories: Kualiti, Udara
Tags: Artikel Jurnal, Data Penerbitan, Terbuka