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为了对江、河、湖泊、水库等具有使用功能的地面水加强保护、控制污染,国家制定了地面水环境质量标准。依据地面水水域的使用目的和保护目标,在标准中将地面水划分为五类:Ⅰ类:主要适用于源头水、国家自然保护区。Ⅱ类:主要适用于集中式生活饮用水源地一级
In order to enhance the protection and control of surface water with functional functions such as rivers, lakes and reservoirs, the State has set the standard of surface water environmental quality. Groundwater is divided into five categories according to the purposes and objectives of surface waters. Category I: It is mainly applicable to source water and national nature reserves. Class Ⅱ: mainly for centralized drinking water source level