Fujian Drinking Water Testing

Test item: Heavy metal nutritional composition

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The sanitary standards for drinking water are legal regulations on various factors (physical, chemical, and biological) related to drinking water and people's health, as well as regulations on relevant behavioral norms to achieve these values, based on the protection of people's physical health and the assurance of human quality of life. These standards are approved by relevant national departments and published in a certain form. At the end of 2006, the Ministry of Health, together with relevant departments, completed the revision of the 1985 version of the "Sanitary Standards for Drinking Water" and officially issued the new version of the "Sanitary Standards for Drinking Water" (GB5749-2006), which was fully implemented from July 1, 2007

The sanitary standards for drinking water can include two main parts: the statutory limit of quantity, which refers to the statutory limit of quantity to ensure that various harmful factors in drinking water do not affect the health and quality of life of the population; The legal code of conduct refers to the legal code of conduct for various stages of production in centralized water supply units to ensure that all indicators of drinking water meet the legal and quantitative limits

Indicator limit

1. Microbial indicators

①

The total coliform (MPN/100mL or CFU/100mL) should not be detected

The heat-resistant coliform (MPN/100mL or CFU/100mL) should not be detected

Escherichia coli (MPN/100mL or CFU/100mL) should not be detected

The total number of colonies (CFU/mL) should be 100

2 Toxicological indicators

Arsenic (mg/L) 0.01

Cadmium (mg/L) 0.005

Chromium (hexavalent, mg/L) 0.05

Lead (mg/L) 0.01

Mercury (mg/L) 0.001

Selenium (mg/L) 0.01

Cyanide (mg/L) 0.05

Fluoride (mg/L) 1.0

Nitrate (in N, mg/L) 10

20

Trichloromethane (mg/L)

0.06

Carbon tetrachloride (mg/L) 0.002

Bromate (mg/L when using ozone) 0.01

Formaldehyde (When ozone is used, mg/L) 0.9

Chlorite (when chlorine dioxide is used for disinfection, mg/L) 0.7

Chlorate (when composite chlorine dioxide is used for disinfection, mg/L) 0.7

3. Properties and chemical indicators

Color (platinum cobalt color unit) 15

Turbidity (NTU scattering turbidity unit) 1

When the technical conditions of water source and purification are limited, it is 3

Odor and odor are odorless Odor

Visible to the naked eye

pH (pH unit) not less than 6.5 and not more than 8.5

Aluminum (mg/L) 0.2

Iron (mg/L) 0.3

Manganese (mg/L) 0.1

Copper (mg/L) 1.0

Zinc (mg/L) 1.0

Chloride (mg/L) 250

Sulfate (mg/L) 250

Total dissolved solid (mg/L) 1000

Total hardness (calculated as CaCO3, mg/L) 450

Oxygen consumption (CODMn method, calculated as O2, mg/L) 3

Water source limitation, raw water oxygen consumption> 5

Volatile phenols (calculated as phenol, mg/L) 0.002

Anionic synthetic detergent (mg/L) 0.3

4. Guidance value

Total α Radioactivity (Bq/L) 0.5

Total β Radioactivity (Bq/L) 1

① MPN represents the most likely number; CFU stands for colony forming unit. When the total coliform group is detected in the water sample, further testing should be conducted for Escherichia coli or heat-resistant coliform groups; The total coliform group was not detected in the water sample, so it is not necessary to test for Escherichia coli or heat-resistant coliform groups

If the radioactive index exceeds the guidance value, nuclide analysis and evaluation should be conducted to determine whether it can be consumed

Folding Appendix Table 2

Disinfectant Name and Water Contact Time Factory Water

Medium Limit Factory Water

Medium Residual Water in the End of the Pipe Network

Chlorine and Free Chlorine Preparation (Free Chlorine, mg/L) at least 30min 4 ≥ 0.3 ≥ 0.05

Monochloroamine (Total Chlorine, mg/L) at least 120min 3 ≥ 0.5 ≥ 0.05

Ozone (O3, mg/L) at least 12min 0.3 0.02

If chlorine is added,

Total chlorine ≥ 0.05

Chlorine dioxide (ClO2, mg/L) at least 30min 0.8 ≥ 0.1 ≥ 0.02

Unconventional indicators and limits of water quality

Appendix Table 3 Unconventional indicators and limits of water quality

Indicator limits

1. Microbial indicators

Giardia flagellata (number/10L)< 1

Cryptosporidium (No./10L)< 1

2 Toxicological indicators

antimony (mg/L) 0.005

barium (mg/L) 0.7

beryllium (mg/L) 0.002

boron (mg/L) 0.5

molybdenum (mg/L) 0.07

nickel (mg/L) 0.02

silver (mg/L) 0.05

thallium (mg/L) 0.0001

cyanide chloride (calculated as CN -, mg/L) 0.07

dichlorodibromomethane (mg/L) 0.1

Dichloroacetic acid (mg/L) 0.05

1,2-dichloroethane (mg/L) 0.03

Dichloromethane (mg/L) 0.02

Trihalomethane The sum of the measured concentrations of various compounds in this type of compound and their respective limit values does 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

Tribromomethane (mg/L) 0.1

Heptachlor (mg/L) 0.0004

Malathion (mg/L) 0.25

Pentachlorophenol (mg/L) 0.009

Total amount of hexachlorobenzene (mg/L) 0.005

Hexachlorobenzene (mg/L) 0.001

rogor (mg/L) 0.08

parathion (mg/L) 0.003

chlorpyrifos (mg/L) 0.3

methyl parathion (mg/L) 0.02

chlorothalonil (mg/L) 0.01

furan (mg/L) 0.007

lindane (mg/L) 0.002

chlorpyrifos (mg/L 0.03

glyphosate (mg/L) 0.7

dichlorvos (mg/L) 0.001

atrazine (mg/L) 0.002

deltamethrin (mg/L) 0.02

2,4-dichloroethylene (mg/L) 0.03

DDT (mg/L) 0.001

Ethylbenzene (mg/L) 0.3

Xylene (mg/L) 0.5

1,1-dichloroethylene (mg/L) 0.03

1,2-dichloroethylene (mg/L) 0.05

1,2-dichlorobenzene (mg/L) 1

1,4-dichlorobenzene (mg/L) 0.3

Trichloroethylene (mg/L) 0.07

Trichlorobenzene (mg/L) Total amount, mg/L) 0.02

Hexachlorobutadiene (mg/L) 0.0006

Acrylamide (mg/L) 0.0005

Tetrachloroethylene (mg/L) 0.04

Toluene(mg/L) 0.7

Di (2-ethylhexyl) phthalate (mg/L) 0.008

epichlorohydrin (mg/L) 0.0004

benzene (mg/L) 0.01

styrene (mg/L) 0.02

benzo (a) pyrene (mg/L) 0.00001

chloroethylene (mg/L) 0.005

chlorobenzene (mg/L) 0.3

microcystin LR (mg/L) 0.001

3 Sensory traits and general chemical indicators

Ammonia nitrogen (calculated as N, mg/L) 0.5

Sulfide (mg/L) 0.02

Sodium (mg/L) 200

Folded Appendix Table 4

1. Microbial indicators  Total bacterial count (CFU/mL) 500

2. Toxicological indicators

Arsenic (mg/L) 0.05

Fluoride (mg/L) 1.2

Nitrate (in N, mg/L) 20

3 Chemical Index

Chroma (Platinum Cobalt Chroma Unit) 20

Turbidity (NTU Scattering Turbidity Unit) 3

When limited by water source and water purification technical conditions, it is 5

pH (pH Unit) is not less than 6.5 and not more than 9.5

Soluble Total Solid (mg/L) 1500

Total Hardness (CaCO3, mg/L) 550

Oxygen Consumption (CODMn Method, O2, mg/L) 5

Iron (mg/L) 0.5

Manganese (mg/L) 0.3

Chloride (mg/L) 300

Sulfate (mg/L) 300

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