Air pollution in the city spiked to a level almost 11 times the World Health Organization standard yesterday as the density of PM2.5 pollutants, tiny particles that can lodge in lungs, reached 268 micrograms per cubic meter at 3pm.
The WHO considers PM2.5 density under 25 micrograms per cubic meter as safe.
The Hangzhou Meteorological Bureau issued a yellow smog alert at 5:05pm yesterday, the third of a four-color warning system. It said the pollutants were blown from north China and will hang over the city.
Shanghai, Jiangsu and a large part of Zhejiang are affected by the smoggy weather. But the city’s AQI is expected to improve tonight as a cold front arrives.
This week will be wet and chilly with a high of 12 degrees today and a low of 2 degrees on Sunday.
Source: Hangzhou International Center