On February15,2015, the Environmental Protection Bureau of Hunan Province released the air quality ranking of January for all the 14 municipal government cities/prefectures of this province according to the Environmental Air Quality Standards , which was also the first ranking implementation according to the new air quality standard, a year earlier than the national requirement.According to the comprehensive index of urban environment air quality, the air quality of January for the 14 cities/prefectures ranked as follows: the city of Changde, Jishou, Yiyan, Yueyang, Zhangjiajie, Yongzhou, Hengyang, Huaihua, Changsha, Loudi, Xiangtan, Shaoyang and Zhuzhou,with Changde, Jishou and Yiyang being the three best cities, and Xiangtan, Shaoyang and Zhuzhou the three worst ones.