The Environmental Ministry found that 38 cities in China have increased PM-10 concentrations in the first half of 2012, including Beijing. The ministry monitors 113 cities throughout the country. Only the city of Haikou (Hainan Province), reached the government's highest standard for air quality. Cities with the worst air quality include Urumqi, Lanzhou, Beijing, Chengdu, Tongchuan, Jining, Xi'an, Weinan, Kaifeng, Xining.
[Source: Renmin Wang]