GB 5749-2022 Standards for drinking water quality English
1 Scope
This document specifies the requirements for drinking water quality and drinking water source quality, the sanitary requirements for drinking water plant, secondary water supply, health and safety products involving drinking water, and water quality inspection methods.
This document is applicable to all kinds of drinking water.
2 Normative references
The following documents contain provisions which, through reference in this text, constitute provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB 3838 Environmental quality standards for surface water
GB/T 5750.1–GB/T 5750.13 Standard examination methods for drinking water
GB/T 14848-2017 Standard for groundwater quality
GB 17051 Hygienic specification for facilities of secondary water supply
GB/T 17218-1998 Hygienic safety evaluation for chemicals used in drinking water treatment
GB/T 17219-1998 Standard for safety evaluation of equipment and protective materials in drinking water system
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
drinking water
water for human to drink and use
3.2
centralized water supply
water supply type of collecting water centrally from water sources and distributing it to users or public water intake points through water transmission and distribution pipe network
3.3
small centralized water supply
centralized water supply with designed daily supply capacity below 1,000m3 or water supply population below 10,000 persons
3.4
decentralized water supply
water supply type that users take water directly from water sources with no treatment or simple facilities only
3.5
finished water
water about to enter the transmission and distribution pipe network after the drinking water plant completes the treatment process flow
3.6
tap water
water generated by delivering finished water to user's taps through water transmission and distribution pipe network
3.7
regular indices
indices reflecting the basic situation of drinking water quality
3.8
expanded indices
indices reflecting the water quality characteristics of regional drinking water and the water quality situation in a certain period of time or under special circumstances
4 Requirements for drinking water quality
4.1 The drinking water quality shall meet the following basic requirements to ensure the drinking safety of users:
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Requirements for drinking water quality
5 Requirements for drinking water source quality
6 Sanitary requirements for drinking water plants
7 Sanitary requirements for secondary water supply
8 Sanitary requirements for health and safety products involving drinking water
9 Water quality inspection method
Annex A (Informative) Reference indices and limits of drinking water quality
Bibliography
1 范围
本文件规定了生活饮用水水质要求、生活饮用水水源水质要求、集中式供水单位卫生要求、二次供水卫生要求、涉及饮用水卫生安全的产品卫生要求、水质检验方法。
本文件适用于各类生活饮用水。
2 规范性引用文件
下列文件中的内容通过文中的规范性引用而构成本文件必不可少的条款。其中，注日期的引用文件，仅该日期对应的版本适用于本文件；不注日期的引用文件，其最新版本(包括所有的修改单)适用于本文件。
GB 3838 地表水环境质量标准
GB/T 5750.1～GB/T 5750.13 生活饮用水标准检验方法
GB/T 14848—2017 地下水质量标准
GB 17051 二次供水设施卫生规范
GB/T 17218—1998 饮用水化学处理剂卫生安全性评价
GB/T 17219—1998 生活饮用水输配水设备及防护材料的安全性评价标准
3 术语和定义
下列术语和定义适用于本文件。
3.1
生活饮用水 drinking water
供人生活的饮水和用水。
3.2
集中式供水 centralized water supply
自水源集中取水，通过输配水管网送到用户或者公共取水点的供水方式。
3.3
小型集中式供水 small centralized water supply
设计日供水量在1000m3以下或供水人口在1万人以下的集中式供水。
3.4
分散式供水 decentralized water supply
用户直接从水源取水，未经任何处理或仅有简易设施处理的供水方式。
3.5
出厂水 finished water
集中式供水单位完成处理工艺流程后即将进入输配水管网的水。
3.6
末梢水 tap water
出厂水经输配水管网输送至用户水龙头的水。
3.7
常规指标 regular indices
反映生活饮用水水质基本状况的指标。
3.8
扩展指标 expanded indices
反映地区生活饮用水水质特征及在一定时间内或特殊情况下水质状况的指标。
4 生活饮用水水质要求
4.1 生活饮用水水质应符合下列基本要求，保证用户饮用安全：
a)生活饮用水中不应含有病原微生物；
b)生活饮用水中化学物质不应危害人体健康；
c)生活饮用水中放射性物质不应危害人体健康；
d)生活饮用水的感官性状良好；
e)生活饮用水应经消毒处理。
4.2 生活饮用水水质应符介表1和表3要求。此厂水和末梢水中消毒剂限值、消毒剂余量均应符合表2要求。
注：当生活饮用水中含有附录A所列指标时，可参考表A.1中该指标的限值评价。
表1 生活饮用水水质常规指标及限值
