According to the World Air Quality Report from IQAir, air quality in several major Indonesian cities is classified as poor, far from the ideal standards set by the World Health Organization (WHO).
IQAir measured this based on the concentration of particulate matter (PM) 2.5 in the air.
PM 2.5 are particles with a diameter of approximately 2.5 micrometers (1 micrometer = 0.001 millimeter).
Because of their extremely small size, these particles can remain suspended in the air for a long time and can be inhaled by humans, triggering health problems such as asthma, lung disease, heart disease, and even cancer.
These particles generally originate from wood burning, stove smoke, motor vehicle exhaust, energy combustion residue from power plants and industries, and cigarette smoke.
There are also natural particles classified as PM 2.5, namely plant spores, pollen, wildfire smoke, and volcanic ash.
According to the WHO, the ideal air quality standard has a PM 2.5 concentration weight of between 0 and 5 micrograms per cubic meter.
However, IQAir recorded an average PM 2.5 concentration in several major Indonesian cities that is about two to seven times higher than that standard, as seen in the graph.
"Air pollution in Indonesia originates from coal-fired power plants, forest fires, and peatland degradation, while pollution in major cities mainly comes from vehicle emissions," said the IQAir team in their report.
IQAir obtained this data from air monitoring stations belonging to the government, research institutions, and private companies spread across Indonesia.
The data collected from these monitoring stations were then validated and recalibrated using IQAir's platform.
"With this data, IQAir wants to inform and inspire the government, educators, researchers, non-profit organizations, companies, and the public to collaborate in raising awareness of air quality," said the IQAir team.