Datong, Yangquan, Linfen, Yibin, Lanzhou, Jinchang and Urumqi have the heaviest air pollution in 7 cities. The State Environmental Protection Administration today released the 2005 National quantitative assessment of urban environmental improvement (hereinafter referred to as the "city test"). The results showed that 178 cities in the 509 cities were treated with a centralized sewage treatment rate of 0. The state environmental protection administration responsible person said that the future "city examination" will be closely integrated with the local government's environmental objectives responsibility system and accountability system, and will be included in the performance appraisal of the party and government leaders. According to the relevant people in charge of the State Environmental Protection Administration, the assessment results of 509 cities in the country showed that the proportion of the cities with better environmental quality in the city was 12.6 percentage points higher than that of the two grade, and the proportion of the inferior grade three cities decreased by 9.9 percentage points. The drinking water quality of the city increased by 0.95 percentage points over the previous year. However, there are more than 5 cities in Inner Mongolia, Wuhai, Yunnan, Zhaotong, Guangxi Hechi, Gansu Longnan, Jiangxi Pingxiang, and Pingxiang 6 cities ranking in the national level cities. The relevant person in charge of the State Environmental Protection Administration of the State Administration of Environmental Protection said that from the results of the "city test" in 2005, it is still very difficult to achieve the goal of "11th Five-Year" national urban environmental protection work, that is, "the national urban sewage treatment rate is no less than 70%, the disposal rate of municipal solid waste is not less than 60%, and the environmental quality of the city has been improved".