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Surface water quality monitoring
Surface water refers to the collective term for water bodies such as lakes, rivers, and reservoirs on the Earth's surface. With the increase of population and rapid economic development, the problem of surface water quality is becoming increasingly prominent.
Purpose of surface water quality monitoring indicators:
1. Monitoring of water temperature and pH value to understand the basic properties and stability of water bodies
2. Monitoring of dissolved oxygen and chemical oxygen demand (COD) to assess oxygen supply and organic pollution in water bodies
3. Monitoring of suspended solids and turbidity to understand the situation of particulate matter pollution in water bodies
4. Monitoring of nutrients (such as ammonia, nitrate, and phosphate) to determine the degree of eutrophication in water bodies
5. Monitoring of heavy metals and organic pollutants to assess the pollution status of water bodies
According to the technical specifications for surface water and sewage monitoring in China (HJ/T91-2002), surface water monitoring items
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Required testing items |
Selected testing items |
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stream |
Water temperature, pH, dissolved oxygen, permanganate index, five-day biochemical oxygen demand, ammonia nitrogen, total nitrogen, total phosphorus, copper, zinc, fluoride, selenium, arsenic, mercury, cadmium, chromium (hexavalent), lead, cyanide, volatile phenols, petroleum, anionic surfactants, sulfides, and fecal coliforms |
Total organic carbon, methylmercury, etc |
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Centralized drinking water source area |
Water temperature, pH, dissolved oxygen, suspended solids ②, permanganate index, chemical oxygen demand, BOD5, ammonia nitrogen, total nitrogen, total phosphorus, copper, zinc, fluoride, iron, manganese, selenium, arsenic, mercury, cadmium, chromium (hexavalent), lead, cyanide, volatile phenols, petroleum, anionic surfactants, sulfides, sulfates, chlorides, nitrates, and fecal coliforms |
Trichloromethane, carbon tetrachloride, tribromomethane, dichloromethane, 1,2-dichloroethane, epichlorohydrin, vinyl chloride, 1,1-dichloroethylene, 1,2-dichloroethylene, trichloroethylene, tetrachloroethylene, chloroprene, hexachlorobutadiene, styrene, formaldehyde, acetaldehyde, acrolein, trichloroacetaldehyde, benzene, toluene, ethylbenzene, xylene ③, isopropylbenzene, chlorobenzene, 1,2-dichlorobenzene, 1,4-dichlorobenzene, trichlorobenzene ④, tetrachlorobenzene ⑤ Hexachlorobenzene, nitrobenzene, dinitrobenzene ⑥, 2,4-dinitrotoluene, 2,4,6-trinitrotoluene, nitrochlorobenzene ⑦, 2,4-dinitrochlorobenzene, 2,4-dichlorophenol, 2,4,6-trichlorophenol, pentachlorophenol, aniline, benzidine, acrylamide, acrylonitrile, dibutyl phthalate, di (2-ethylhexyl) phthalate, hydrazine hydrate, tetraethyl lead, pyridine, turpentine, picric acid, butyl xanthic acid Active chlorine, DDT, Lindane, Epoxyheptachlor, Parathion, Methyl Parathion, Malathion, Dimethoate, Dichlorvos, Dichlorvos, Dichlorvos, Internally Absorbed Phosphorus, Chlorothalonil, Methomyl, Deltamethrin, Atrazine, Benzo (a) pyrene, Methylmercury, Polychlorinated Biphenyls ⑧, Microcystin LR, Yellow Phosphorus, Molybdenum, Cobalt, Beryllium, Boron, Antimony, Nickel, Barium, Vanadium, Titanium, Thallium |
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lake |
Water temperature, pH, dissolved oxygen, permanganate index, five-day biochemical oxygen demand, ammonia nitrogen, total nitrogen, total phosphorus, copper, zinc, fluoride, selenium, arsenic, mercury, cadmium, chromium (hexavalent), lead, cyanide, volatile phenols, petroleum, anionic surfactants, sulfides, and fecal coliforms |
Total organic carbon, methylmercury, nitrate, etc |
Note: In some monitoring projects, if the monitoring results are below the detection limit and it is confirmed that there are no new sources of pollution, the monitoring frequency can be reduced. According to the different economic development situations in different regions, the selected testing items should be monitored once a year in areas with monitoring capabilities (equipped with GC/MS).
② Measure turbidity when the suspended solids are below 5mg/L.
③ Xylene refers to ortho xylene, meta xylene, and para xylene.
④ Trichlorobenzene refers to 1,2,3-trichlorobenzene, 1,2,4-trichlorobenzene, and 1,3,5-trichlorobenzene.
⑤ Tetrachlorobenzene refers to 1,2,3,4-tetrachlorobenzene, 1,2,3,5-tetrachlorobenzene, and 1,2,4,5-tetrachlorobenzene.
⑥ Dinitrobenzene refers to o-dinitrobenzene, m-dinitrobenzene, and p-dinitrobenzene.
⑦ Nitrochlorobenzene refers to ortho nitrochlorobenzene, meta nitrochlorobenzene, and para nitrochlorobenzene.
⑧ Polychlorinated biphenyls refer to PCB-1016, PCB-1221, PCB-1232, PCB-1242, PCB-1248, PCB-1254, and PCB-1260.
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Contact: 010-53353722
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Contact: 010-53353723
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