As of this afternoon, air quality both in Phnom Penh capital and the provinces remain good, affirmed the Ministry of Environment in a press release.
PM2.5, the atmospheric particulate matter that has a diametre of less than 2.5 micrometres, is around the standard limit of 50 micrograms per cubic metre (g/m3), underlined the same source, adding that in Phnom Penh, PM2.5 was recorded at 52.64 g/m3 on Jan. 21.
Air quality situation has returned to normal since last Saturday after it surpassed the standard limits on Jan. 17, it said. The Ministry of Environment's experts will continue monitoring the air quality situation, and the public will be kept informed.
Not only Cambodia, but also other countries in the region have been facing air pollution due to the dry temperature in the Mekong sub-region, said the ministry, attributing the increase in PM2.5 mainly to factory smoke, exhaust fumes, forest fires, rubbish burning, dust from construction sites, etc.
Air Quality Index stipulates air quality is satisfactory, and air pollution poses little or no risk if the PM2.5 (the atmospheric particulate matter that has a diametre of less than 2.5 micrometres) is between 0-50. However, for some pollutants there may be a moderate health concern for a very small number of people who are unusually sensitive to air pollution between 51-100.
It becomes more dangerous if the quality scale moves to between 101-150 as people with greater sensitivity can experience health impacts. In case of air quality worsen to 151-200, the condition is unhealthy, and human can start to feel it and for some people they might get ill.
Source: Agency Kampuchea Press