What standard should groundwater meet before it can be directly drunk?
Hmm ~ ~ ~
This is the national standard of groundwater drinking water in China. You can refer to this table for testing.
Note: The water in Table 1, Table 2 and Table 3 can be drunk directly, the water in Table 4 must be treated before drinking, and the water in Table 5 cannot be drunk under any circumstances.
The last two items, radioactivity, are for reference only, and additional radionuclide analysis and evaluation are needed before judgment.
If you don't drink water alone, but want to concentrate on the villagers and the like, in addition to following this table, you need to test disinfectants and microorganisms according to the national standard of centralized water supply! Confirm whether there is secondary pollution during centralized water supply.
14848-20 17 groundwater quality standard
1, range?
This standard specifies the classification, indicators and limits of groundwater quality, groundwater quality investigation and monitoring, groundwater quality evaluation, etc. This standard is applicable to the investigation, monitoring, evaluation and management of groundwater quality. ?
2. Normative reference documents?
The following documents are essential for the application of this document. For dated reference documents, only dated version is applicable to this document. For undated reference documents, the latest edition is applicable to this document. ?
GB5749-2006 Hygienic standard for drinking water?
GB/T27025-2008 general requirements for testing and calibration laboratories?
3. Terms and definitions
The following terms and definitions apply to this document. ?
3. 1 groundwater quality?
Physical, chemical and biological characteristics of groundwater. ?
3.2 conventional index?
Indicators reflecting the basic situation of groundwater quality include sensory characteristics, general chemical indicators, microbial indicators, common toxicological indicators and radioactive indicators. ?
3.3 Unconventional indicators?
In the extension of conventional indicators, the groundwater quality indicators determined according to regional and time difference XOR special conditions reflect the main quality problems in groundwater, including relatively rare inorganic and organic toxicology indicators. ?
3.4 Human health risk insurance?
Probability that various components in groundwater are harmful to human health. ?
4. Classification and indicators of groundwater quality?
4. 1 groundwater quality classification?
According to the quality of groundwater and human health risks in China, referring to the quality requirements of drinking water, industry and agriculture, and according to the content of each component, it is divided into five categories. ?
Class I: the chemical composition of groundwater is low, which is suitable for various purposes;
Class ii: the chemical composition of groundwater is low, which is suitable for various purposes?
Class ⅲ: the chemical composition of groundwater is moderate, and according to GB5749-2006, it is mainly suitable for centralized drinking water mining and industrial and agricultural water use; ?
Ⅳ: The chemical composition of groundwater is high. Based on the water quality requirements of industrial and agricultural water and certain human health risks, it is suitable for agriculture and some industrial water, and can be used as drinking water after proper treatment;
Ⅴ: Groundwater is not suitable as drinking water source because of its high chemical composition, and other water can be selected according to the purpose of use. ?
4.2 Groundwater quality classification indicators Groundwater quality indicators are divided into conventional indicators and unconventional indicators. See Table 1 and Table 2 respectively for their classification and limit values.
Table 1? Conventional indicators and limits of groundwater quality
Table 2? Unconventional indexes and limits of groundwater quality
5. Investigation and monitoring of groundwater quality?
5. 1 Groundwater quality should be monitored regularly. The frequency of diving monitoring should be no less than twice a year, and the frequency of confined water monitoring can be determined according to the change of water quality, and it should be 1 time per year. ?
5.2 According to the dynamic changes of groundwater quality, regional groundwater quality investigation and evaluation should be conducted regularly. ?
5.3 Groundwater quality survey and monitoring indicators are mainly conventional indicators. In order to facilitate the audit of hydrochemical analysis results, brocade, calcium, mirror, bicarbonate, carbonate, free carbon dioxide and other indicators should be supplemented; On the basis of conventional indicators, different regions can supplement and select unconventional indicators for investigation and monitoring according to local actual conditions. ?
5.4 The collection of groundwater samples shall be carried out according to relevant standards, and the preservation and inspection of groundwater samples shall be carried out according to Appendix A ...
5.5 See Appendix B for the selection of groundwater quality detection methods. Before use, it should be effectively confirmed and verified according to the requirements of 5.4 in GB/T27025-2008. ?
6. Groundwater quality assessment?
6. 1 Groundwater quality evaluation should be based on groundwater quality test data. ?
6.2 Evaluation of single index of groundwater quality The groundwater quality category is determined according to the limit range of index value. In the case of the same index limit, the preferential treatment is not inferior.
Example: The limit values of volatile classes are all 0.00 1mg/L. If the quality analysis result is 0.001mg/L, it should be classified as Class I, not Class II. ?
6.3 The comprehensive evaluation of groundwater quality should be determined according to the category with the worst evaluation results of individual indicators, and the indicators of the worst category should be pointed out.
Specific content of groundwater environmental quality standard
2. 1 This standard specifies the classification, monitoring and evaluation methods and protection of groundwater quality.
2.2 This standard is applicable to general groundwater, not to underground hot water, mineral water and brine. Groundwater quality classification
According to the present situation of groundwater quality in China, the reference value of human health and the protection goal of groundwater quality, and referring to the highest requirements of drinking water and industrial and agricultural water quality, groundwater quality is divided into five categories.
Class I mainly reflects the natural low background content of groundwater chemical composition. Suitable for various purposes.
Class II mainly reflects the natural background content of groundwater chemical composition. Suitable for various purposes.
The third category is the reference value based on human health. Mainly suitable for centralized drinking water sources and industrial and agricultural water.
Class Ⅳ is based on the requirements of agricultural and industrial water use. Besides being suitable for agriculture and some industrial water, it can be used as drinking water after proper treatment.
Class ⅴ is not suitable for drinking, and other water can be selected according to the purpose of use.
classified index
Project serial number category standard value project category one category two category three category four category five category.
1 color ≤5≤5≤ 15≤2525
Smell and taste are all.
3 Turbidity ≤3≤3≤3≤ 10 10
You can't see anything with the naked eye.
5pH6.5~8.55.5~6.58.5~95.5，9
6 Total hardness ≤ 150≤300≤450≤550550
7 Total dissolved solids ≤300≤500≤ 1000≤20002000
8 sulfate ≤50≤ 150≤250≤350350
9 Chloride ≤50≤ 150≤250≤350350
10 iron ≤ 0.1≤ 0.2 ≤ 0.3 ≤1.51.5
1 1 Mn ≤ 0.05 ≤ 0.05 ≤ 0.1≤10/.0
12 copper ≤ 0.01≤ 0.05 ≤1.0 ≤1.51.5
13 zinc ≤0.05≤0.5≤ 1.0≤5.05.0
14 Mo≤0.00 1≤0.0 1≤0. 1≤0.50 . 5
15 Co≤0.005≤0.05≤0.05≤ 1.0 1.0
16 volatile phenol ≤ 0.001≤ 0.001≤ 0.002 ≤ 0.010.05438+0.
17 anionic synthetic detergent shall not be detected ≤0. 1≤0.3≤0.30.3.
18 permanganate index ≤1.0 ≤ 2.0 ≤ 3.0 ≤10/0.
19 nitrate ≤2.0≤5.0≤20≤3030
20 nitrite ≤ 0.001≤ 0.01≤ 0.02 ≤ 0.1.
2 1 ammonia nitrogen ≤0.02≤0.02≤0.2≤0.50.5
22 fluoride ≤1.0 ≤1.0 ≤1.0 ≤ 2.02.0
23 Iodide ≤ 0.1≤ 0.1≤ 0.2 ≤1.01.0
24 cyanide ≤ 0.001≤ 0.01≤ 0.05 ≤ 0.1.
25 Mercury ≤ 0.00005 ≤ 0.0005 ≤ 0.001≤ 0.001
26 arsenic ≤ 0.005 ≤ 0.01≤ 0.05 ≤ 0.050.05
27 Selenium ≤ 0.01≤ 0.01≤ 0.01≤ 0.0/.
28 cadmium ≤ 0.0001≤ 0.001≤ 0.01≤ 0.010.05438+0.
29 Cr ≤ 0.005 ≤ 0.01≤ 0.05 ≤ 0.10.1
30 lead ≤ 0.005 ≤ 0.01≤ 0.05 ≤ 0.10.1
3 1 beryllium ≤ 0.00002 ≤ 0.0001≤ 0.0002 ≤ 0.0010.005438+0
32 Ba≤0.0 1≤0. 1≤ 1.0≤4.04 . 0
33 Nickel ≤ 0.005 ≤ 0.05 ≤ 0.05 ≤ 0.10.1
34 Drops shall not be detected ≤ 0.005 ≤1.0≤1.01.0.
35 bhc ≤0.005≤0.05≤5.0≤5.05.0
36 Total coliforms ≤ 3.0 ≤ 3.0 ≤ 3.0 ≤100100
Total bacterial count ≤100 ≤100 ≤100 ≤1000/000.
Total σ radioactivity ≤ 0.1≤ 0.1≤ 0.10.10/
Total beta radioactivity ≤ 0.1≤1.0 ≤1.01.0.
According to the characteristics of groundwater content, it is divided into five categories, which is the basis of groundwater quality evaluation. All kinds of special water with groundwater as water source can be managed according to relevant special water standards on the basis of classified management of groundwater quality. 5. 1 Groundwater quality should be tested regularly in all regions. The inspection method shall be implemented according to the national standard GB5750 "Inspection Method for Hygienic Standard of Drinking Water".
5.2 Local groundwater monitoring departments should set up water quality monitoring points in different quality categories of groundwater, and the monitoring frequency should be no less than twice a year.
5.3 The monitoring items are: pH, ammonia nitrogen, nitrate, nitrite, volatile phenol, cyanide, arsenic, mercury, chromium, total hardness, lead, fluorine, cadmium, iron, manganese, total dissolved solids, permanganate index, sulfate, chloride, coliform bacteria, and other items reflecting the main water quality problems in this area. 6. 1 Groundwater quality evaluation can be divided into single-component evaluation and comprehensive evaluation based on groundwater quality investigation and analysis data or water quality monitoring data.
6.2 The evaluation of individual components of groundwater quality is divided into five categories according to the classification indexes listed in this standard, and the code is the same as the category code. When the standard values of different categories are the same, the preferential treatment is not inferior.
For example, the standard values of Class I and Class II volatile phenols are both 0.00 1mg/L. If the water quality analysis result is 0.001mg/L, it should be classified as Class I, not Class II.
6.3 Comprehensive evaluation of groundwater quality adopts annotated scoring method. Specific requirements and steps are as follows:
6.3. 1 The scoring items shall not be less than the monitoring items specified in this standard, but not including bacteriological indicators.
6.3.2 First, evaluate each individual component and classify the quality category of the component.
6.3.3 For each category, the evaluation score Fi of individual components shall be determined according to the following provisions.
Table 2
Class I, Class II, Class III, Class V, Class V
Fi0 136 10
6.3.5 According to the F value, divide the groundwater quality grade according to the following provisions, and then indicate the evaluation category of bacteriological indicators after the grade name. Such as "excellent" and "better".
Table 3
Excellent, good, good, poor, very poor.
f 0 . 800 . 80 ~ 2 . 502 . 50 ~ 4 . 254 . 25 ~ 7 . 207 . 20
6.4 When the water quality analysis data is used for two or more evaluations, the groundwater quality can be evaluated separately, or the annual average and multi-year average or the average of dry season and wet season for many years can be used for ground evaluation according to the specific situation.
6.5 In the evaluation of groundwater quality, in addition to this method, other evaluation methods can be used for comparison. 7. 1 In order to prevent groundwater pollution, over-exploitation and artificial recharge from deteriorating groundwater quality and protect groundwater sources, the relevant provisions of the Water Pollution Prevention Law of People's Republic of China (PRC) and the Water Resources Law of People's Republic of China (PRC) must be implemented.
7.2 Sewage irrigation, sewage discharge, hazardous waste stacking and underground disposal must go through environmental geological feasibility demonstration and environmental impact assessment, and be approved by the environmental protection department. This standard was put forward by the Ministry of Geology and Mineral Resources of People's Republic of China (PRC).
This standard is under the jurisdiction of the Geological Environment Management Department of the Ministry of Geology and Mineral Resources and the Institute of Hydrogeology and Engineering Geology of the Ministry of Geology and Mineral Resources.
This standard is drafted by Geological Environment Management Department of Ministry of Geology and Mineral Resources, Institute of Hydrogeology Engineering Geology of Ministry of Geology and Mineral Resources, National Environmental Hydrogeology Station, Jilin Environmental Hydrogeology Station, Henan Environmental Hydrogeology Station, Shaanxi Environmental Hydrogeology Station, Guangxi Zhuang Autonomous Region Environmental Hydrogeology Station and Jiangxi Environmental Geology Brigade.
The main drafters of this standard are Zhang Xigen, Yan, Li Jingsen, Miao Changqing, Lu Shuiming, Shen Xiaozhen, Duo Chaomei and Lei Jinyun.
Groundwater drinking water standard
This standard is formulated in order to protect and rationally develop groundwater resources, prevent and control groundwater pollution, safeguard people's health and promote economic construction. This standard is the basis of groundwater exploration, evaluation, development and utilization, supervision and management.
2 Subject content and scope of application
2. 1 This standard specifies the classification, monitoring and evaluation methods and protection of groundwater quality.
2.2 This standard is applicable to general groundwater, not to underground hot water, mineral water and brine.
3 reference standard
GB5750 Standard Test Method for Drinking Water
4 groundwater quality classification and quality classification index
4. 1 groundwater quality classification According to the present situation of groundwater quality in China, the reference value of human health and the protection target of groundwater quality, and referring to the highest requirements of drinking water and industrial and agricultural water quality, groundwater quality is divided into five categories.
Class I mainly reflects the natural low background content of groundwater chemical composition. Suitable for various purposes.
Class II mainly reflects the natural background content of groundwater chemical composition. Suitable for various purposes.
The third category is the reference value based on human health. Mainly suitable for centralized drinking water sources and industrial and agricultural water.
Class Ⅳ is based on the requirements of agricultural and industrial water use. Besides being suitable for agriculture and some industrial water, it can be used as drinking water after proper treatment.
Class ⅴ is not suitable for drinking, and other water can be selected according to the purpose of use.
4.2 groundwater quality classification index
Table 1 groundwater quality classification index