Some standard content:
National Standard of the People's Republic of China
Quality standard for ground water
Quality standard for ground waterGB/T 148489
This standard is specially prepared to protect and reasonably develop groundwater resources, prevent and control groundwater pollution, safeguard people's health and promote economic construction.
This standard is the basis for groundwater exploration, evaluation, development, utilization and supervision and management. 2 Subject content and scope of application
2.1 This standard specifies the quality classification of groundwater, groundwater quality monitoring, evaluation methods and groundwater quality protection. 2.2 This standard is applicable to general groundwater, not to underground hot water, mineral water and brine. 3 Referenced by brown standard
GB5750 Standard test method for drinking water 4 Groundwater quality classification and quality classification indicators 4.1 Groundwater quality classification
Based on the current status of groundwater quality in my country, human health benchmark values and groundwater quality protection targets, and with reference to the quality requirements of drinking water and industrial water, groundwater quality is divided into five categories. Class I mainly reflects the natural low background content of groundwater chemical components. It is suitable for various uses. Class I mainly reflects the natural background content of groundwater chemical components. It is suitable for various uses. Class 1 is based on the human health benchmark value. It is mainly suitable for centralized drinking water sources and industrial and agricultural water. Class V is based on the requirements of agricultural and industrial water. In addition to being suitable for agricultural and some industrial water, it can be used as domestic 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 indicators (see Table 1). Table 1 Classification index of groundwater quality
Standard value
Item number
Throat and taste
Turbidity
(degrees)
Approved by the State Bureau of Technical Supervision on December 30, 1993 Class I
1994-10-013
Item number
Standard value
Matter visible to the naked eye
Total hardness (calculated as CacOa)
(mg/L)
Total dissolved solids Body
(mg/L)
Sulfate
（mg/L）
Chloride
Iron (Fe)
(mg/L）
(mg/L)
Manganese (Mn).（mg/L)
Copper (Cu)
(mg/L)
Zinc (Zn）
(mg/L)
Molybdenum (Mo）(mg/L.)
Cobalt (Co)|| tt||(tag/L)
Volatile phenols (in phenol) (mg/L)Anionic synthetic detergents
(mg/L)
(mg/L)
Permanganate index
Nitrate (in N)wwW.bzxz.Net
(mg/L)
Nitrite (in N)
Ammonia nitrogen (NH)）
Oxide
Iodide
Cyanide
Seek (Hg)||t t||As /L)
(mg/L)
Chromium (hexavalent) (C-)
Lead (Pb)
Wrinkle (Be)
(mg/L)
(mag/L)
GB/T 14848—93
Continued Table 1
must not be detected
.0.001
≤0.00005
.0.005
≤0.000 5
≤0.000 1
>2 000
Item No.
Standard Value
Barium (Ba)
Ni (Ni)
Dichlorobenzene
Hexachlorobenzene
(rmg/L)
(mg/L)
(μg/L)
(μg/L)
Total Coliform Group
(pieces/L)
Total Bacteria·(pieces/mL)
Total Radioactivity
Total β Radioactivity
(Bg/L)
(Bq/L)
GB/T 14848—93
Continued Table 1
Do not pick out
>1 000
Based on the characteristics of the content of each indicator of groundwater, it is divided into five categories, which is the basis for groundwater quality evaluation. All kinds of special water with groundwater as the water source can be managed according to the relevant special water standards on the basis of groundwater quality classification management. 5 Groundwater quality monitoring
5.1 Each region should conduct regular inspections on groundwater quality. The inspection method shall be implemented in accordance with the national standard GB5750≤Standard Inspection Method for Drinking Water.
5.2 Groundwater monitoring departments in various regions shall set up monitoring points in groundwaters of different quality categories for water quality monitoring, and the monitoring frequency shall not be less than twice a year (flood and dry seasons).
5.3 Monitoring items are: pH, ammonia nitrogen, nitrate, nitrite, volatile phenols, cyanide, arsenic, mercury, chromium (hexavalent), total hardness, lead, fluoride, iron, manganese, total dissolved solids, permanganate index, sulfate, chloride, coliform bacteria, and other items reflecting the main water quality problems in the region.
6 Groundwater quality evaluation
6.1 The groundwater quality evaluation is based on the groundwater quality investigation and analysis data or water quality monitoring data, and can be divided into two types: single component evaluation and comprehensive evaluation.
6.2 The single component evaluation of groundwater quality is divided into five categories according to the classification indicators listed in this standard. The code is the same as the category code. When the standard values of different categories are the same, the better ones are selected instead of the worse ones.
Example: Volatile phenols I and I are both 0.001 mg/L. If the water quality analysis result is 0.001 mg/L, it should be classified as I, not as L.
6.3 The comprehensive evaluation of groundwater quality adopts the scoring method as noted in Xie's note. The specific requirements and steps are as follows: 6.3.1 The items participating in the scoring should not be less than the monitoring items specified in this standard, but do not include bacteriological indicators. 6.3.2 First, evaluate each single component and classify the quality category to which the component belongs. 6.3.3 Determine the single component evaluation score Fi for each category according to the following provisions (Table 2). Table 2
GB/T14848-93
6.3.4 Calculate the comprehensive evaluation score F according to formula (1) and formula (2). F
Where: F—the average value of the score F of each single component F max
—the maximum value of the single component evaluation score F: the number of items.
（2）
6.3.5 Based on the F value, classify the groundwater quality level according to the following provisions (Table 3), and then annotate the bacteriological index evaluation category after the level name. For example, "excellent (Class I)"\better (Class)\. Table 3
0.80~.2.50
2.50~4. 25
4.25~7.20
6.4 "When using water quality analysis data from more than two times for evaluation, groundwater quality evaluation can be carried out separately, or according to specific circumstances, the annual average value and multi-year average value or the multi-year dry season and flood season average values can be used for evaluation. 6.5 When evaluating groundwater quality, in addition to using this method, other evaluation methods can also be used for comparison. Groundwater quality protection
7.1 In order to prevent groundwater pollution and excessive exploitation, artificial recharge and other causes of groundwater quality deterioration, and protect groundwater sources, it must be implemented in accordance with the relevant provisions of the "Water Pollution Prevention and Control Law of the People's Republic of China" and the "Water Law of the People's Republic of China". 7.2 The use of sewage for irrigation, sewage discharge, storage and underground disposal of hazardous wastes (urban garbage, industrial waste residues, nuclear waste, etc.) must be subject to environmental geological feasibility demonstration and environmental impact assessment, and can only be implemented after obtaining approval from the environmental protection department. Additional notes:
This standard is proposed by the Ministry of Geology and Mineral Resources of the People's Republic of China. 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 was drafted by the Geological Environment Management Department of the Ministry of Geology and Mineral Resources, the Institute of Hydrogeology and Engineering Geology of the Ministry of Geology and Mineral Resources, the National Environmental Hydrogeological Station, the Jilin Provincial Environmental Hydrogeological Station, the Henan Provincial Hydrogeological Station, the Shaanxi Provincial Environmental Hydrogeological Station, the Guangxi Zhuang Autonomous Region Environmental Hydrogeological Station, and the Jiangxi Provincial Environmental Geology Brigade. The main drafters of this standard are Li Meiling, Zhang Xigen, Yan Baorui, Li Jingsen, Miao Changqing, Lv Shuiming, Shen Xiaozhen, Xi Wenlian, Duo Chaomei, and Lei Weiyun.
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