Guiyang's air quality ranks 3rd nationwide in first nine months

Guizhou's provincial capital Guiyang ranked third nationwide in the air quality report released by the Ministry of Ecology and Environment on Oct 20.

The report showcased the air quality status of China's top 20 cities in September and during the first nine months of the year. Guiyang was second to Haikou in Hainan province and Yaan in Sichuan province.

In September, the average ratio of good air quality days was 91.7 percent among 337 cities at and above the prefecture-level – a year-on-year increase of 11.2 percentage points. The concentration of PM2.5, PM10 and O3 was 21 milligrams per cubic meter, 42 mg per cu m and 134 mg per cu m, respectively, a year-on-year decrease of 19.2 percent, 17.6 percent and 14.6 percent.

Since July 2018, it has released ratings of the 20 cities with the best and worst air quality every month and 20 cities with the highest and lowest air quality improvement degree semiannually.