According to China Review News, on June 19, the Ministry of Environmental Protection issued its May report on the air quality in 74 cities. In those cities, the number of days that met the air quality standard was only 60 percent. The number was much lower in the Beijing, Tianjing, and Shandong province region which dropped from 50.6 percent in April to 27.4 percent in May. Beijing was again listed among the ten cities with the worst air quality. In May it only had 8 days during which air quality met the standard. In Hebei Province alone, six cities placed in the top ten list of those with the worst air quality.
Source: China Review News, June 20, 2013