Air quality in Phnom Penh has returned to a satisfactory level, according to a news release of the Ministry of Environment made public this afternoon.
PM2.5, the atmospheric particulate matter that has a diametre of less than 2.5 micrometres, is under the standard limits, i.e. at 40.49 per cubic metre (g/m3) on Jan. 20, down from 60.61 g/m3 two days earlier, pointed out the same source.
For the provinces, it added, the air quality is also good based on reports from air quality monitoring stations across the country.
The ministry's experts will continue monitoring the air quality situation, and the public will be kept informed, affirmed the news release.
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