Some standard content:
1 General Principles
National Standard of the People's Republic of China
Sanitary Standard for Drinking Water
Sanitary Standard for Drinking Water GB5749—1985
1.1 This standard is formulated to implement the principle of "prevention first", supply drinking water that meets hygienic requirements to residents, and protect people's health. 1.2 This standard shall be implemented by water supply units and relevant units such as planning and design. Health and epidemic prevention stations and environmental sanitation monitoring stations at all levels shall be responsible for supervising and inspecting the implementation. When building, expanding or renovating centralized water supply, the competent department of the water supply unit must jointly study the water use plan with the health, environmental protection, planning, urban construction and water conservancy units, determine the water source selection, water source protection and engineering design plan, carefully review and design, and complete the completion acceptance. It can only be put into use after the approval of the health and epidemic prevention station.
The water source selection, water quality identification, hygienic protection and regular management of decentralized water supply shall be studied and decided by the relevant local units delegated by the township and town governments where the water supply is located. Public security, planning, health, environmental protection and other units at all levels must cooperate with water supply units to protect water sources and prevent pollution according to the protection zone requirements specified in the standard. 1.3 This standard applies to centralized water supply (including domestic drinking water prepared by each unit) and decentralized water supply for urban and rural drinking water.
2 Water quality standards and sanitary requirements bZxz.net
2.1 The quality of domestic drinking water should not exceed the limits specified in the following table. Item
Sensory properties and general chemical indicators
Toxicological indicators
Bacteriological indicators
Radioactive indicators
Note: *Trial standard
Drinking
Water quality standard
Turbidity
Odor and taste
Matter visible to the naked eye
Total hardness (calculated as calcium carbonate)
Volatile phenols (calculated as phenol)
Anionic synthetic detergents
Sulfate
Chloride
Total dissolved solids
Fluoride||t t||Cyanide
Chromium (hexavalent)
Nitrate (in terms of nitrogen)
Chloroform*
Carbon tetrachloride*
Benzo(a)pyrene*
DDT**
BHC*
Total number of bacteria
Total coliform group
Free residual chlorine
Total α radioactivity
Total β radioactivity
Color shall not exceed 15 degrees, and shall not show other colors. No more than 3 degrees, and in special cases, no more than 5 degrees. No odor or taste.
Shall not contain
mg / L
mg / L
mg / L
mg / L
mg / L
mg / L
mg / L
mg / L
mg / L
μg/ L
μg/ L
μg/ L
μg/ L
pcs/mL
After contacting with water for 30min, it should not be less than 0.3mg/L. In addition to the factory water that should meet the above requirements, the water at the end of the pipe network should be lower than 0.05mg/L
Bq / L
2.2 In addition to having the necessary purification equipment according to needs, centralized water supply should also be disinfected regardless of whether its water source is surface water or groundwater. The primary water distribution wells that directly supply groundwater to the pipe network should also have sand removal and anti-turbidity facilities when necessary.
The relevant water storage, water distribution and water delivery equipment must be tight. And it must not be directly connected to drainage facilities to prevent back siphoning. All kinds of water storage equipment built by water users should be protected, cleaned and disinfected regularly to prevent pollution. 2.3 The raw materials and water purifiers used in water supply equipment that come into contact with water must not pollute the water quality. New materials and water purifiers must be approved by the provincial, municipal and autonomous regional health departments (bureaus) and reported to the Ministry of Health for filing. 2.4 The domestic drinking water supply system prepared by each unit is strictly prohibited from being connected to the urban and town water supply system. Otherwise, the responsibility shall be borne by the water user who connects the pipeline. 2.5 Centralized water supply units should continuously strengthen the management of water intake, purification, water storage, water distribution and water delivery equipment, and establish effective systems and operating procedures for water discharge, cleaning, disinfection and maintenance to ensure the quality of water supply. Before new equipment and new pipe networks are put into operation or after old equipment and old pipe networks are repaired, they must be strictly flushed and disinfected. Water can only be officially supplied after the turbidity, bacteria, visible objects and other indicators are tested and qualified. 2.6 Personnel directly engaged in water supply must establish health records and undergo regular physical examinations, no less than once a year. If infectious disease patients or healthy carriers are found, they should be immediately transferred from their jobs. 2.7 Decentralized water supply should strengthen health management, establish necessary health systems, take practical measures, and do regular maintenance and management work.
3 Water source selection
3.1 The selection of water sources for new water plants should be based on long-term and short-term urban and rural planning, water quality, hydrology and hydrogeology data over the years, and the health conditions of water intake points and nearby areas. At the same time, taking into account factors such as endemic diseases, a comprehensive evaluation should be conducted from multiple aspects such as health, economy, technology, and water resources to select water sources with good water quality, abundant water volume, and easy protection. Groundwater should be used first, and water intake points should be located upstream of towns and industrial and mining enterprises. 3.2 The quality of water used as a source of drinking water shall meet the following requirements. 3.2.1 If the source water is used for drinking only after chlorination, the average total coliform bacteria per liter shall not exceed 1,000. After purification and chlorination, the average total coliform bacteria per liter shall not exceed 10,000.
3.2.2 The sensory properties and general chemical indicators of the source water shall meet the requirements of Article 2.1 of this standard after purification.
The water quality of decentralized water supply sources shall meet the requirements of Article 2.1 of this standard as much as possible. 3.2.3 The toxicological and radioactive indicators of the source water must meet the requirements of Article 2.1 of this standard. 3.2.4 In high-fluoride areas or endemic goiter areas, source water with appropriate fluoride and iodine content should be selected. Otherwise, preventive measures should be taken as needed. 3.2.5 If the water source contains harmful substances not listed in Article 2.1 of this standard, the relevant requirements of TJ36-79 "Industrial Enterprise Design Hygiene Standard" shall be followed. 3.3 If water exceeding one of the above indicators has to be used as a source of drinking water, the consent of the provincial, municipal, or autonomous region health department (bureau) should be obtained, and the principle of not affecting health should be followed. According to the degree of excess, research should be conducted with relevant departments to adopt appropriate treatment methods to make the treated water meet the requirements of this standard within a limited period of time.
Water Source Hygiene Protection
The source of drinking water must be equipped with a hygienic protection zone. 4.2 The provisions of the hygienic protection zone of the centralized water supply source are as follows. 4.2.1 Surface water
4.2.1.1 Fishing, mooring, swimming and any activities that may pollute the water source are strictly prohibited within a radius of 100m around the water intake point, and the water supply unit shall set up obvious range signs and notice boards of prohibited matters. 4.2.1.2 Industrial wastewater and domestic sewage shall not be discharged into the waters 1000m upstream and 100m downstream of the water intake point. Waste residues shall not be piled up within the coastal protection range, and no warehouses, stacks or docks for loading and unloading garbage, feces and toxic substances shall be set up. Industrial wastewater or domestic sewage shall not be used for irrigation and persistent or highly toxic pesticides shall not be applied. Grazing and other activities that may pollute the water quality of this section of water area shall not be carried out. Reservoirs and lakes for drinking water should designate part of the water area around the water intake point or the entire water area and its coast as sanitary protection zones according to the needs of different situations, and implement the above requirements. The upstream and downstream protection areas of river water intake points affected by tides and their coastal protection areas shall be determined by the water supply unit in conjunction with the health and epidemic prevention station and the environmental sanitation monitoring station based on specific conditions. 4.2.1.3 For centralized water supply using rivers as water sources, the water supply unit, in conjunction with the health and environmental protection departments, may designate a certain range of river sections 1000m upstream of the water intake point as a water source protection area based on actual needs, and strictly control the discharge of pollutants upstream. When discharging sewage, it shall comply with the relevant requirements of TJ36-79 "Industrial Enterprise Design Hygiene Standards" and GB3838-83 "Surface Water Environmental Quality Standards" to ensure that the water quality at the water intake point meets the water quality requirements of drinking water sources.
4.2.1.4 The scope of the water production area should be clearly demarcated and marked with obvious signs. No living quarters, livestock farms, seepage toilets, or seepage pits shall be set up within a radius of not less than 10m outside the production area. Garbage, feces, waste residues, or sewage channels shall not be piled up. Good sanitary conditions and greening shall be maintained. The sanitary requirements for the separately established pumping stations, sedimentation tanks, and clear water tanks within a radius of not less than 10m are the same as those for the water plant production area.
4.2.2 Groundwater
4.2.2.1 The protection scope of the water intake structure shall be determined based on the hydrogeological conditions, the form of the water intake structure, and the sanitary conditions of the surrounding areas. The protection measures are the same as those for the water plant production area of surface water. 4.2.2.2 Within the influence radius of a single well or a group of wells, it is not allowed to use industrial wastewater or domestic sewage for irrigation and apply persistent or highly toxic pesticides. It is not allowed to build seepage toilets, seepage pits, pile up waste residues, or lay sewage channels. It is not allowed to engage in activities that damage the deep and upper layers. If the water-intake layer does not appear above the ground within the influence radius of the well or there is no complementary relationship between the water-intake layer and the surface water, a smaller protection range can be set according to the specific situation. The protection range of the water-intake structure, the range of the influence radius and the sanitary protection of the groundwater source in the karst area should be determined by the water supply department together with the planning and design, hydrogeology, health, environmental protection and other departments. 4.2.2.3 Within the scope of the water plant production area, it should be implemented in accordance with the requirements of the surface water plant production area. 4.3 For the sanitary protection zone of the decentralized water supply source, when the surface water is used as the water source, refer to the provisions of 4.2.1.1 and 4.2.1.2 of this standard. When the groundwater is used as the water source, within 30m around the well, no pollution sources such as seepage toilets, seepage pits, cesspools, garbage dumps and waste residue dumps shall be set up, and a sanitary inspection system shall be established. 4.4 The scope and specific provisions of the sanitary protection zone of centralized water supply sources shall be proposed by the water supply unit, and after consultation with the health, environmental protection, public security and other departments, reported to the local people's government for approval and publication, and the relevant units shall be notified in writing to comply with and implement, and fixed notice boards shall be set up in the protection zone. For the sanitary protection zone of centralized water supply sources that do not meet the requirements of this standard, the water supply unit shall propose a transformation plan together with the health, environmental protection, public security and other departments, and after approval by the local people's government, the relevant units shall be instructed to complete it within a time limit.
The sanitary protection requirements for decentralized water supply sources shall be proposed by the local health and epidemic prevention station and environmental sanitation monitoring station, and implemented by the user unit.
4.5 In order to protect groundwater sources, the quality of artificially recharged water shall, in principle, comply with the provisions of Article 2.1 of this standard. Industrial wastewater and domestic sewage shall not be discharged into infiltration pits or infiltration wells. 5 Water quality inspection
5.1 The water quality inspection method shall be implemented in accordance with GB5750-85 "Standard Inspection Method for Drinking Water". The health and epidemic prevention stations and environmental sanitation monitoring stations are responsible for the analysis, quality supervision and evaluation. 5.2 Centralized water supply units in cities and towns must establish water quality inspection rooms to inspect the water quality of source water, water from purification structures, factory water and pipe network water. Large and medium-sized enterprises with self-supplied water supply should be equipped with full-time (part-time) personnel to be responsible for the water quality inspection of their units. For self-supplied water supply of other units, their competent departments should instruct relevant units or report to the superiors to designate relevant units to be responsible for the water quality inspection of their industries and systems. The water quality of decentralized water supply and centralized water supply in rural areas should be inspected by local health and epidemic prevention stations and environmental sanitation monitoring stations as needed.
5.3 To inspect the quality of drinking water, samples should be taken at water sources, factory water and points where residents frequently use water. 5.3.1 The number of sampling points for water quality inspection of centralized water supply in cities and towns should generally be calculated as one point for every 20,000 people supplied with water. When the population of water supply exceeds one million, the number of sampling points calculated according to the above ratio may be reduced as appropriate, and when the population is less than 200,000, it should be increased as appropriate. There should be a certain number of sampling points among all the sampling points, selected at water sources, factory water, places where water quality is easily polluted, pipe network ends and obsolete parts of pipe network systems, etc. Each sampling point should be sampled and tested at least twice a month, and the number of times can be appropriately increased if conditions permit. In general, bacteriological indicators and sensory characteristics indicators are listed as mandatory inspection items, and other indicators can be selected according to local water quality conditions and needs. Sampling points and inspection items should be jointly studied and determined by the water supply unit and the local health and epidemic prevention station and environmental sanitation monitoring station. A full analysis of water source water, factory water and some representative pipe network end water should be conducted once a month.
The number of sampling points, sampling times and inspection items for water quality inspection of self-supplied water supply and rural centralized water supply can be determined according to the specific situation and in accordance with the above requirements. The results of the above water quality inspections should be regularly submitted to the local health and epidemic prevention station and environmental sanitation monitoring station for review and filing.
5.3.2 The frequency and items of water quality inspection for decentralized water supply can be determined according to needs. 5.3.3 Health and epidemic prevention stations and environmental sanitation monitoring stations should conduct regular monitoring of water source water, factory water and residents' frequent water use points.
5.4 When selecting water sources, water quality identification should be carried out to test the indicators specified in Article 2.1 of this standard and the drinking water quality standards and the relevant items that the water source may be contaminated by certain components. Appendix A
Explanation of terms used in this standard
(Supplement)
A.1 The terms used to describe the strictness of the implementation of the provisions of this standard are written as follows: A.1.1 Words that indicate very strict and must be done in this way: positive words generally use "must" and negative words generally use "strictly prohibited". A.1.2 Words that indicate strict and should be done in normal circumstances: positive words generally use "should" and negative words generally use "should not" or "must not". A.1.3 indicates that some choices are allowed. When conditions permit, the words that should be used first are: positive words generally use "should" or "generally", and negative words generally use "should not". Additional notes:
This standard is proposed by the Ministry of Health of the People's Republic of China. This standard is drafted by the revision group of "Sanitary Standards for Drinking Water". The main drafters of this standard are Wang Zishi, Qin Yuhui, Zheng Naitong, Pan Changqing, and Zhang Ming. This standard is managed by the Ministry of Health of the People's Republic of China, and general technical issues are interpreted by the Environmental Health Monitoring Institute of the Chinese Academy of Preventive Medicine.
From the date of implementation of this standard, TJ20-76 "Sanitary Standards for Drinking Water (Trial)" will be invalid.2Centralized water supply units in cities and towns must establish water quality inspection rooms to inspect the water quality of water sources, water discharged from purification structures, factory water and pipe network water. Large and medium-sized enterprises with self-supplied water supply should be equipped with full-time (part-time) personnel to be responsible for the water quality inspection of their units. For self-supplied water supply of other units, their competent departments should instruct relevant units or report to the superiors to designate relevant units to be responsible for water quality inspection of their industries and systems. The water quality of decentralized water supply and rural centralized water supply should be inspected by local health and epidemic prevention stations and environmental sanitation monitoring stations as needed.
5.3 To inspect the quality of drinking water, samples should be taken from water sources, factory water and points where residents frequently use water. 5.3.1 The number of sampling points for water quality inspection of centralized water supply in cities and towns should generally be calculated as one point for every 20,000 people supplied with water. When the population supplied with water exceeds one million, the number of sampling points calculated according to the above ratio may be reduced as appropriate, and when the population is less than 200,000, it should be increased as appropriate. There should be a certain number of sampling points among all the sampling points, which are selected at water sources, factory water, places where water quality is easily polluted, pipe network terminals and obsolete parts of pipe network systems, etc. For each sampling point, sampling and testing should be conducted at least twice a month. The number of times can be appropriately increased if conditions permit. In general, bacteriological indicators and sensory characteristics indicators are mandatory inspection items, and other indicators can be selected according to local water quality conditions and needs. Sampling points and inspection items should be jointly studied and determined by the water supply unit and the local health and epidemic prevention station and environmental sanitation monitoring station. A full analysis should be conducted once a month for water source water, factory water and some representative pipe network terminal water.
The number of sampling points, sampling times and inspection items for water quality inspection of self-supplied water supply and rural centralized water supply can be determined according to the specific situation and in accordance with the above requirements. The results of the above water quality inspections should be regularly submitted to the local health and epidemic prevention station and environmental sanitation monitoring station for review and filing.
5.3.2 The number and items of water quality inspections for decentralized water supply can be determined according to needs. 5.3.3 The health and epidemic prevention stations and environmental sanitation monitoring stations shall conduct regular monitoring of water sources, factory water and water points frequently used by residents.
5.4 When selecting water sources, water quality identification shall be conducted by testing the indicators specified in Article 2.1 of this standard and the drinking water quality standards and the relevant items that the water source may be contaminated by certain components. Appendix A
Explanation of terms used in this standard
(Supplement)
A.1 The terms used to describe the degree of strictness of the implementation of the provisions of this standard shall be written as follows: A.1.1 The terms that indicate that it is very strict and must be done in this way are generally "must" for positive terms and "strictly prohibited" for negative terms. A.1.2 The terms that indicate that it is strict and should be done in this way under normal circumstances are generally "should" for positive terms and "should not" or "shall not" for negative terms. A.1.3 The terms that indicate that there is a slight choice and that it should be done first when conditions permit are generally "should" or "generally" for positive terms and "should not" for negative terms. Additional notes:
This standard was proposed by the Ministry of Health of the People's Republic of China. This standard was drafted by the revision group of "Sanitary Standards for Drinking Water". The main drafters of this standard are Wang Zishi, Qin Yuhui, Zheng Naitong, Pan Changqing and Zhang Ming. This standard is managed by the Ministry of Health of the People's Republic of China, and general technical issues are interpreted by the Environmental Health Monitoring Institute of the Chinese Academy of Preventive Medicine.
From the date of implementation of this standard, TJ20-76 "Sanitary Standards for Drinking Water (Trial)" will be invalidated.2Centralized water supply units in cities and towns must establish water quality inspection rooms to inspect the water quality of water sources, water discharged from purification structures, factory water and pipe network water. Large and medium-sized enterprises with self-supplied water supply should be equipped with full-time (part-time) personnel to be responsible for the water quality inspection of their units. For self-supplied water supply of other units, their competent departments should instruct relevant units or report to the superiors to designate relevant units to be responsible for water quality inspection of their industries and systems. The water quality of decentralized water supply and rural centralized water supply should be inspected by local health and epidemic prevention stations and environmental sanitation monitoring stations as needed.
5.3 To inspect the quality of drinking water, samples should be taken from water sources, factory water and points where residents frequently use water. 5.3.1 The number of sampling points for water quality inspection of centralized water supply in cities and towns should generally be calculated as one point for every 20,000 people supplied with water. When the population supplied with water exceeds one million, the number of sampling points calculated according to the above ratio may be reduced as appropriate, and when the population is less than 200,000, it should be increased as appropriate. There should be a certain number of sampling points among all the sampling points, which are selected at water sources, factory water, places where water quality is easily polluted, pipe network terminals and obsolete parts of pipe network systems, etc. For each sampling point, sampling and testing should be conducted at least twice a month. The number of times can be appropriately increased if conditions permit. In general, bacteriological indicators and sensory characteristics indicators are mandatory inspection items, and other indicators can be selected according to local water quality conditions and needs. Sampling points and inspection items should be jointly studied and determined by the water supply unit and the local health and epidemic prevention station and environmental sanitation monitoring station. A full analysis should be conducted once a month for water source water, factory water and some representative pipe network terminal water.
The number of sampling points, sampling times and inspection items for water quality inspection of self-supplied water supply and rural centralized water supply can be determined according to the specific situation and in accordance with the above requirements. The results of the above water quality inspections should be regularly submitted to the local health and epidemic prevention station and environmental sanitation monitoring station for review and filing.
5.3.2 The number and items of water quality inspections for decentralized water supply can be determined according to needs. 5.3.3 The health and epidemic prevention stations and environmental sanitation monitoring stations shall conduct regular monitoring of water sources, factory water and water points frequently used by residents.
5.4 When selecting water sources, water quality identification shall be conducted by testing the indicators specified in Article 2.1 of this standard and the drinking water quality standards and the relevant items that the water source may be contaminated by certain components. Appendix A
Explanation of terms used in this standard
(Supplement)
A.1 The terms used to describe the degree of strictness of the implementation of the provisions of this standard shall be written as follows: A.1.1 The terms that indicate that it is very strict and must be done in this way are generally "must" for positive terms and "strictly prohibited" for negative terms. A.1.2 The terms that indicate that it is strict and should be done in this way under normal circumstances are generally "should" for positive terms and "should not" or "shall not" for negative terms. A.1.3 The terms that indicate that there is a slight choice and that it should be done first when conditions permit are generally "should" or "generally" for positive terms and "should not" for negative terms. Additional notes:
This standard was proposed by the Ministry of Health of the People's Republic of China. This standard was drafted by the revision group of "Sanitary Standards for Drinking Water". The main drafters of this standard are Wang Zishi, Qin Yuhui, Zheng Naitong, Pan Changqing and Zhang Ming. This standard is managed by the Ministry of Health of the People's Republic of China, and general technical issues are interpreted by the Environmental Health Monitoring Institute of the Chinese Academy of Preventive Medicine.
From the date of implementation of this standard, TJ20-76 "Sanitary Standards for Drinking Water (Trial)" will be invalidated.
Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.