The revision of Hygienic Standard for Drinking Water is one of the important measures to ensure the safety of drinking water. Under the coordination of the National Standardization Administration Committee, the Ministry of Health, together with the Ministry of Construction, the Ministry of Land and Resources, the Ministry of Water Resources and the State Environmental Protection Administration, organized experts in health, water supply, environmental protection, water conservancy and water conservancy to participate in the revision of this standard.
Extended data:
Conventional indicators of drinking water standards:
1, microorganism
Total coliforms (MPN/ 100mL or CFU/ 100mL) shall not be detected.
Thermostable coliforms (MPN/ 100mL or CFU/ 100mL) shall not be detected.
Escherichia coli (MPN/ 100mL or CFU/ 100mL) shall not be detected.
Total number of colonies (CFU/ ml) 100.
2. Toxicological indicators
Arsenic (mg/L) 0.0 1
Cadmium (mg/L) 0.005
Chromium (hexavalent, mg/L) 0.05
Lead (mg/L) 0.0 1
Mercury (mg/L) 0.00 1
Selenium (mg/L) 0.0 1
Cyanide (mg/L) 0.05
Nitrate (in terms of n, mg/L) is 10, and it is 20 when the groundwater source is limited.
Chloroform (mg/L) 0.06
Carbon tetrachloride (mg/L) 0.002
Bromate (mg/L when ozone is used) 0.0 1.
Formaldehyde (mg/L when ozone is used) 0.9
Chlorite (mg/L when chlorine dioxide is used for disinfection) 0.7
Chlorate (mg/L when disinfected with compound chlorine dioxide) 0.7
3, chemical indicators
Chromaticity (platinum and cobalt chromaticity units) 15
Turbidity (NTU turbidity unit) is 1, which is 3 under the condition of limited water source and water purification technology.
Smell and taste are no different from smell and odor.
You can't see anything with the naked eye.
PH(pH unit) is 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 solids (mg/l) 1000
Total hardness (calculated as CaCO3, mg/L) 450
Oxygen consumption (CODMn method, calculated by O2, mg/L)3. Water source limitation, raw water oxygen consumption >; 5 at 6 mg/l
Volatile phenol (calculated as phenol, mg/L) 0.002
Anionic synthetic detergent (mg/L) 0.3
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