The Pudong New Area and Chongming District enjoyed the best air quality in the past two years, while Jiading and Qingpu districts recorded the highest average level of the dangerous pollutant PM2.5 particle due to their geographic location. According to statistics made available by the Shanghai Environmental Monitoring Center, the Pudong New Area reported the lowest average density for PM2.5 compared with other districts in 22 out of the 24 months in 2016 and 2017. It was followed by Chongming District, which reported the lowest or second-lowest density of PM2.5 in 13 months in the past two years. Qingpu and Jiading districts had the worst figures. Qingpu’s average density of PM2.5 was the highest in Shanghai in 17 months. It was followed by Jiading, which reported the highest or second-highest density of PM2.5 in 21 months in the past two years.