| environ. |
drinking water treatment The Directive on the Quality of Surface Water Intended for Drinking Water defines three categories of water treatment (A1, A2, A3) from simple physical treatment and disinfection to intensive physical and chemical treatment. The treatment to be used depends on the quality of the water abstracted. The Directive uses imperative values for parameters known to have an adverse effect on health and also guide values for those which are less adverse. There is also a directive which complements the "surface water abstraction" Directive by indicating the methods of measurement and the frequency of sampling and analysis required (欧盟《可饮用的地表水水质指引》中将饮用水根据其处理程度，分成三级(A1，A2，A3)，包括从简单的物理处理和消毒到复杂的物理化学处理。 采用的处理等级，依原水水质而定。 欧盟指引对于已知有害健康的参数，通常采取强制管理；对于危害性较小者，则采取指引式的规范。 欧盟也定有相关指引，制定采样与分析方法和频率，以补充"地表水抽取"指引的不足。) |
