Smog that has choked the city for three days will linger for two more days until Sunday, environment monitors said yesterday.
Windless condition is blamed for the smog which is mainly caused by PM2.5 particles. The city’s air quality index reached 109 micrograms per cubic meter at 3pm yesterday, four times the World Health Organization’s safety level of 25 micrograms.
The pollutants were blown in from the north and the smoggy weather is likely to get worse, the Hangzhou Environment Monitoring Center warned.
Experts at the center attributed the smog to straw burning in rural areas in north China and to the seasonal high pressure.
The sunny weather will continue through Sunday. Dry and cloudy days are expected next week. Temperatures from today to next Monday will stay between 14 degrees and 25 degrees Celsius.
Source: Hangzhou International Center