• 2022
    English Chinese

    Water Environment Index Report (2021 Q4)

    Since 2016, IPE has been collecting water quality data released by governments across China, organizing and classifying them, and displaying them on the Blue Map website and app. IPE developed the City Water Environment Index (CWEI) in 2019, which compares surface water conditions in different cities across China. On the World Water Day of 2022, Blue Map launches its fourth quarterly report for CWEI evaluation for 2021. This report compares the surface water quality in 361 cities across the country in the fourth quarter of 2022, as well as changes in water quality over the eight quarters since 2020.
    Publication Date:2022-03-25