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GB 5749-2022
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 13.060
CCS C 51
Replacing GB 5749-2006
Standards for drinking water quality
ISSUED ON: MARCH 15, 2022
IMPLEMENTED ON: APRIL 01, 2023
Issued by: State Administration for Market Regulation;
Standardization Administration of the People’s Republic of China.
Table of Contents
Foreword ... 3
1 Scope ... 5
2 Normative references ... 5
3 Terms and definitions... 5
4 Water quality requirements for drinking water ... 7
5 Water quality requirements for sources of drinking water ... 11
6 Hygienic requirements for centralized water supply units ... 11
7 Hygienic requirements for secondary water supply ... 12
8 Hygienic requirements for products involving the sanitation and safety of drinking
water ... 12
9 Inspection methods for water quality ... 12
Appendix A (Informative) Reference indices and limit values of drinking water quality
... 13
References ... 15
Standards for drinking water quality
1 Scope
This document specifies the water quality requirements for drinking water, the water
quality requirements for sources of drinking water, the hygienic requirements for
centralized water supply units, the hygienic requirements for secondary water supply,
the hygienic requirements for products involving the sanitation and safety of drinking
water, and the inspection methods for water quality.
This document applies to all types of drinking water.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this
document and are indispensable for its application. For dated references, only the
version corresponding to that date is applicable to this document; for undated references,
the latest version (including all amendments) is applicable to this document.
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
3 Terms and definitions
The following terms and definitions are applicable to this document.
3.1
drinking water
Drinking water and water for human life.
3.2
centralized water supply
The water supply method of collecting water from the water source centrally, and
transporting it to users or public water supply points through the water transport and
distribution network.
3.3
small centralized water supply
Centralized water supply with a designed daily water supply below 1 000 m3 or a water
supply population below 10 000.
3.4
decentralized water supply
The water supply method where users draw water directly from the water source,
without any treatment or with treatment by simple facilities only.
3.5
finished water
The water that is about to enter the water transport and distribution network after the
treatment process completed by the centralized water supply unit.
3.6
tap water
The finished water that is transported to the user's faucet through the water transport
and distribution network.
3.7
regular indices
Indices that reflect the basic status of drinking water quality.
3.8
expanded indices
Indices that reflect the drinking water quality characteristics in a region and the water
quality within a certain period of time or under special circumstances.
7 Hygienic requirements for secondary water supply
The facilities and treatment requirements for secondary water supply shall comply with
the provisions of GB 17051.
8 Hygienic requirements for products involving the sanitation
and safety of drinking water
8.1 Chemical treatment agents such as flocculation, coagulation aid, disinfection,
oxidation, adsorption, pH adjustment, rust prevention, and scale inhibition used in the
treatment of drinking water shall not pollute drinking water, and shall comply with the
provisions of Chapter 3 in GB/T 17218-1998; disinfectants and disinfection equipment
shall comply with the requirements in "Sanitary and Safety Evaluation Specification
for Drinking Water Disinfectants and Disinfection Equipment (Trial)".
8.2 The water transport and distribution equipment, protective materials and water
treatment materials for drinking water shall not pollute the drinking water, and shall
comply with the provisions in Chapter 3 of GB/T 17219-1998.
9 Inspection methods for water quality
The general principles and requirements for each parameter of water quality inspection
shall be in accordance with GB/T 5750.1; the collection and preservation of water
samples shall be carried out in accordance with GB/T 5750.2; the water analysis quality
control shall be carried out in accordance with GB/T 5750.3; the corresponding
inspection methods shall be carried out in accordance with GB/T 5750.4 ~ GB/T
5750.13.
......
(Above excerpt was released on 2022-06-04, modified on 2022-06-04, translated/reviewed by: Wayne Zheng et al.)
Source: https://www.chinesestandard.net/PDF.aspx/GB5749-2022