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Air quality in Haikou in September 2020 took the first place in China

China's Ministry of Ecology and Environment notified the state of surface water and ambient air quality nationwide in September 2020 and January-September 2020. Among 168 key cities in China, Haikou ranked first in air quality in September.

 

In September, the average number of good days in 337 cities at the provincial level and above nationwide was 91.7%, an increase of 11.2 percentage points year on year; PM2.5 concentration amounted to 21 μg / m3, which is 19.2% less compared to the same period last year; the PM10 concentration was 42 μg / m3. Annual decline of 17.6%; O3 concentration was 134 μg / m3, a decrease in comparison with the same period last year by 14.6%; SO2 concentration was 9 μg / m3, an annual decrease of 10.0%; NO2 concentration was 22 µg / m3, a decrease of 8.3% year on year; CO concentration was 0.9 mg / m3, unchanged compared to the same period last year.

 

From January to September, the average number of good days in 337 cities at the provincial level and above nationwide was 87.2%, an increase of 5.7 percentage points year on year; PM2.5 concentration amounted to 30 μg / m3, which is 11.8% less compared to the same period last year; PM10 concentration was 51 μg / m3, a decrease of 15.0% compared to the same period last year; O3 concentration amounted to 142 μg / m3, a decrease compared to the same period last year by 6.6%; SO2 concentration amounted to 10 μg / m3, a decrease compared to the same period last year by 9.1%; NO2 concentration amounted to 22 μg / m3, a decrease in comparison with the same period last year by 12.0%; CO Concentration was 1.2 mg / m3, which is 7.7% less than a year earlier.

 

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