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生态环境部组织开展地级及以上城市国家地表水考核断面水环境质量排名工作

来源:加拿大28网站_加拿大28软件『欢迎您』 发布时间: 2018-05-07 00:00:00 字体大小:
    今日,生态环境部向媒体通报了开展地级及以上城市国家地表水考核断面水环境质量排名工作的有关情况。

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  地级及以上城市国家地表水考核断面水环境质量排名遵循客观公正、科学规范和公开透明的原则,依据《技术规定》,采用统一的指标和方法计算城市水质综合指数(CWQI)及变化程度(CWQI),并进行排名: 一是城市国家地表水考核断面水环境质量状况排名。采用排名城市国家地表水考核断面采测分离监测数据,计算城市水质综合指数(CWQI)。按照城市水质综合指数(CWQI)从小到大的顺序进行排名,排名越靠前说明该城市国家地表水考核断面水环境质量状况越好。二是城市国家地表水考核断面水环境质量变化情况排名。计算排名时段城市水质综合指数与去年同期水质综合指数变化率(CWQI),CWQI为负值,说明该城市国家地表水考核断面水环境质量变好;CWQI为正值,说明该城市国家地表水考核断面水环境质量变差。按照CWQI从小到大的顺序排名,排名越靠前,表明该城市国家地表水考核断面水质改善程度越高。

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