The average daily amount of a toxic air pollutant called PM2.5 is projected to reach 42 micrograms per cubic meter in Fukuoka on Friday, topping the central government-set environmental standard of up to 35 micrograms, officials of the southwestern Japan city said.
PM2.5, a hazardous particulate matter measuring below 2.5 microns, or 2.5 thousandths of a millimeter, in diameter is drifting from China and the Fukuoka municipal government is urging those with respiratory system disorders to wear masks and citizens in general to be careful about air pollution.
This is the third time the daily amount of PM2.5 has been projected to top the allowable level since Feb. 15 when local governments began to project the daily amount of PM2.5. Earlier, the Fukuoka city government projected the daily amount of PM2.5 would top the allowable level on Feb. 23 and Tuesday.
Yellow dust from the Chinese continent is expected to begin reaching Japan on a full scale Friday.
Due to the PM2.5 pollutant and the yellow dust, visibility will be reduced to 6-10 kilometers from Friday through Saturday, the Fukuoka municipal government said.
Meanwhile, the Fukuoka prefectural government said it would begin issuing an alert on Saturday through its website if the density of PM2.5 is expected to rise.
The prefectural government will issue the alert if the density of PM2.5 is expected to top the central government-set provisional allowable level of 70 micrograms per cubic meter.
The prefectural government said it would urge citizens to refrain from doing strenuous outdoor activities if the density of PM2.5 is projected to top the criteria based on data collected from 23 locations in Fukuoka Prefecture in the early morning.