202 1 how many days is the air quality polluted in Suzhou?

Seven days. According to the data released by China's environmental protection department, among the 365 days in 20021Suzhou, the air quality was heavily polluted for 4 days and lightly polluted for 3 days, so there were 7 days of pollution, accounting for 0.82%. Air quality reflects the degree of air pollution and is judged according to the concentration of pollutants in the air.