What is the normal range of pm2.5 index?
Excellent: 0~35μg/m
Good: 35~75μg/m?
Slight pollution: 75~115μg/m
< p>Moderate pollution: 115~150μg/m?Severe pollution: 150~250μg/m?
Severe pollution: greater than 250μg/m? and above.
Extended information:
PM2.5 is the main cause of haze. The WHO has pointed out: When the annual average concentration of PM2.5 reaches 35 micrograms per cubic meter, human The risk of death is approximately 15% higher than that at 10 micrograms per cubic meter. Research also shows that the higher the concentration of PM2.5, the incidence of respiratory diseases and cardiovascular diseases also increases.
The harm caused by PM2.5 to the human body is so serious, but most people are kept in the dark and do not receive corresponding tips and guidance to take effective precautions to avoid this harm. This reality is obviously contrary to the government's public service responsibilities and the spirit of information disclosure. An important source of PM2.5 is vehicle exhaust. The deteriorating PM2.5 data will touch the public and question their responsibilities in pollution prevention and control, thus reminding more people to drive less and choose green travel.
Baidu Encyclopedia-PM2.5 value