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GB 5749-2006 English PDF (GB5749-2006)

GB 5749-2006 English PDF (GB5749-2006)

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GB 5749-2006: Standards for drinking water quality

This Standard specifies the basic structure, categories and specifications, technical requirements, test methods, inspection rules and marks of helmets for motorcyclists.
GB 5749-2006
GB
NATIONAL STANDARD OF THE
PEOPLE REPUBLIC OF CHINA
ICS 13.060
C 51
Replacing GB 5749-1985
Standards for Drinking Water Quality
ISSUED ON. DECEMBER 29, 2006
IMPLEMENTED ON. JULY 1, 2007
Issued by. Ministry of Health of China; Standardization Administration of China.
Table of Contents
Foreword ... 3
1. Scope ... 5
2. Normative references ... 5
3. Terms and Definitions ... 6
4. Sanitary requirements of the drinking water quality ... 6
5. Sanitary requirements of the drinking water source quality ... 11
6. Sanitary requirements on central water supply organizations ... 11
7. Sanitary requirements on secondary water supply ... 11
8. Sanitary requirements on health- and safety-related products of drinking water .. 12 9. Water quality monitoring ... 12
10. Water examination methods ... 13
Annex A ... 14
References ... 16
Foreword
All the technical contents of this standard are compulsive.
This standard replaces GB 5749-1985 Standards for Drinking Water Quality, from the implementation date of this standard.
Compared with previous edition, there have been some significant changes in this standard in the following technical aspects.
- The water-quality indexes are increased to 106 items from 35 items of GB 5749-1985, up 71 items. 8 of the previous items have been revised as follows. a) Microorganism indexes are increased to 6 items from 2 initially; it newly covers escherichia coli, heat-resisting coliform group, giardia and
cryptosporidium; total coliform group is revised;
b) The drinking water disinfectant are increased to 4 items from 1 item initially; it newly covers monochloroamine, ozone and chlorine dioxide;
c) Inorganic compound of toxicological indexes are increased to 21 items from 10 items initially; it newly covers bromate, chlorite, chlorate, stibium, barium, beryllium, boron, molybdenum, nickel, thallium, cyanogen chloride; and
arsenium, cadmium, lead and nitrate are revised;
d) The organic compound of toxicological indexes are increased to 53 items from 5 items initially; it newly covers formaldehyde, trihalomethane,
dichloromethane, 1,2-dichloroethane, 1,1,1-trichloroethane, bromoform,
chlorodibromomethane, monobromo-dichloro-methane, epoxy chloropropane,
vinyl chloride, 1,1-dichloroethylene, vinylene chloride, trichloroethylene, tetrachloroethylene, hexachlorobutadiene, dichloroacetic acid, trichloroacetic acid, trichloroacetaldehyde, benzene, toluene, xylene, ethylbenzene, styrene, 2,4,6-trichlorophenol, chlorobenzene, 1,2-dichlorobenzene,
1,4-dichlorobenzene, trichlorobenzene, dinbutyl phthalate (2-ethylhexyl) ester, acrylamide, microcystin-LR, bentazone, chlorothalonil, deltamethrin,
dimethoate, 2,4-dichlorophenoxyacetic acid, heptachlor, hexachlorobenzene, lindane, malathion, parathion, methyl parathion, pentachlorophenol, atrazine, furadan, chlorpyrifos, equigard and glyphosate; carbon tetrachloride is revised;
e) Sensitive character and general chemical indexes are increased to 20 items from 15 items initially; it newly covers oxygen consumption, ammonia nitrogen, sulfide, sodium and aluminium; turbidity is revised;
f) For radioactive index, total alpha radioactivity is revised.
Standards for Driving Water Quality
1.??Scope
This standard specifies the sanitary requirements for drinking water quality, drinking water source quality, central water supply organization, secondary water supply and health- and safety-related products, together with the water quality monitoring methods and water examination methods.
This standard is applicable to all kinds of central drinking water supply and non-central drinking water supply in both urban and rural regions.
2.??Normative??references
The following standards contain the provisions which, through reference in this text, constitute the provisions of this standard. For dated documents, the subsequent amendments (excluding corrigendum) or revisions of these publications do not apply. However, the parties who enter into agreement according to these specifications are encouraged to study whether the latest editions of these documents are applicable. For undated references, the latest edition of the normative document is applicable to these specifications.
GB 3838 Environmental Quality Standards for Surface Water
GB/T 5750 (all parts) Standard Inspection Methods for Drinking Waters
GB/T 14848 Standards for Groundwater Quality
GB 17051 Health Specifications for Secondary Water Supply Facilities
GB/T 17218 Assessment of Health Safety for Treatment Chemicals of Drinking Water
GB/T 17219 Safety Evaluation Criteria for Drinking Water Distribution Equipment and Protective Material
CJ/T 206 Standards for Water Quality of Municipal Water Supply
SL 308 Standards for Aptitude of Rural Water Supply Organizations
Health Specifications for Central Drinking Water Supply Organizations (Ministry of Health)
4.1.1 The drinking water shall be free of pathogenic microorganism.
4.1.2 Drinking water shall contain no human health-endangered chemicals. 4.1.3 Drinking water shall contain no human health-endangered radioactive substances.
4.1.4 The sensitive property of drinking water shall be acceptable.
4.1.5 The drinking water shall be sterilized.
4.1.6 The drinking water quality shall conform to the sanitary requirements stated in Table 1 and Table 3. The ex-works in-water disinfectant limit of central water supply and the in-water disinfectant margin of the pipeline terminal shall conform to the requirements of Table 2.
4.1.7 Due to the limit of conditions, the water quality of small central water supply and non-central water supply can be executed according to the requirements of Table 4 and the rest indices can be executed according to the provisions of Table 1, 2 and 3. 4.1.8 When any public accident event affects the water quality, the sensitive property and general chemical index can be loosened upon the approval from the city-above government.
4.1.9 When the drinking water contains the indices listed in Table A1, the assessment can make reference to the limit of this table.
Table 1 Regular indices of water quality and their limits
Index Limit
1. Microorganism indices a
Total coliform group/ (MPN/100mL or CFU/100mL) Must not be detected
Heat resisting coliform group/ (MPN/100mL or
CFU/100mL) Must not be detected
Escherichia coli/ (MPN/100mL or CFU/100mL) Must not be detected
Aerobic bacteria count/ (CFU/mL) 100
2. Toxicological indices
As/ (mg/L) 0.01
Cd/ (mg/L) 0.005
Cr (Hexavalent)/ (mg/L) 0.05
Pb/ (mg/L) 0.01
Ag/ (mg/L) 0.001
Se/ (mg/L) 0.01
Cyanide/ (mg/L) 0.05
Fluoride/ (mg/L) 1.0
Nitrate (counted in "N")/ (mg/L) 10 If the groundwater source is confined, Table 2 Regular indices and requirements on disinfectant of drinking water Disinfectant
Time
exposed to
water
Ex-works
in-water limit/
(mg/L)
Ex-works
in-water margin/
(mg/L)
Pipeline terminal
in-water margin/
(mg/L)
Chlorine gas and free
chlorine preparation (free
chlorine)
???30min 4 ???0.3 ???0.05
Monochloramine (total
chlorine) ???120min 3 ???0.5 ???0.05
Ozone (O3) ???12min 0.3 --
???0.02
If adding chlorine,
then the total
chlorine ???0.05
Chlorine dioxide (ClO2) ???30min 0.8 ???0.1 ???0.02
Table 3 Non-regular indices and limits of water quality
Index Limit
1. Microorganism indices
Giardia/ (pcs/10L) < 1
Cryptosporidium/ (pcs/10L) < 1
2. Toxicological indices
Sb/ (mg/L) 0.005
Ba/ (mg/L) 0.7
Be/ (mg/L) 0.002
B/ (mg/L) 0.5
Mo/ (mg/L) 0.07
Ni/ (mg/L) 0.02
Ag/ (mg/L) 0.05
Tl/ (mg/L) 0.0001
Cyanogen chloride (counted as CN-)/ (mg/L) 0.07
Chlorodibromomethane/ (mg/L) 0.1
monobromo-dichloro-methane/ (mg/L) 0.06
Dichloroacetic acid/ (mg/L) 0.05
1,2-dichloroethane/ (mg/L) 0.03
Dichloromethane/ (mg/L) 0.02
Trihalomethane (summation of chloroform,
chlorodibromomethane, monobromo-dichloro-methane and
bromoform)
The ratio of the measured
concentration of all kinds of compounds
to their limits shall not exceed 1
1,1,1-Trichloroethane/ (mg/L) 2
Trichloroacetic acid/ (mg/L) 0.1
Trichloroacetaldehyde/ (mg/L) 0.01
2,4,6-Trichlorophenol/ (mg/L) 0.2
Bromoform/ (mg/L) 0.1
requirements of GB 17051.
8. Sanitary requirements on health?€? and safety?€?related products of drinking??water
8.1 Treatment chemicals for flocculation, flocculation acceleration, sterilization, oxygenation, absorption, pH adjustment, antirust and anti-precipitation of drinking water shall not pollute the drinking water and shall conform to the requirements of GB/T 17218.
8.2 The distribution equipment, protective material and water treatment material of drinking water shall not pollute the drinking water and shall conform to the requirements of GB/T 17219.
9.??Water??quality??monitoring
9.1 Water quality detection of water supply organizations
9.1.1 The selection of n...

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