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◉ Introduction to Lake Water Testing
A lake is a slow-flowing body of water formed by stagnant water in depressions on land.
◉ Test Items
Lake Water Testing Items and Limits
|
Item |
Limit |
|
|
Chemical indicators |
Turbidity |
Not more than 1 degree (NTU)①, in special cases not more than 5 degrees (NTU） |
|
pH |
6.5～8.5 |
|
|
Total hardness (as CaCO3) |
450（mg/L） |
|
|
Aluminium |
0.2（mg/L） |
|
|
Iron |
0.3（mg/L） |
|
|
Mn |
0.1（mg/L） |
|
|
Copper |
1.0（mg/L） |
|
|
Zinc |
1.0（mg/L） |
|
|
Volatile phenols (as phenol) |
0.002（mg/L） |
|
|
Anionic synthetic detergent |
0.3（mg/L） |
|
|
Sulfate |
250（mg/L） |
|
|
Chloride |
250（mg/L） |
|
|
Total dissolved solids |
1000（mg/L） |
|
|
Oxygen consumption (as O2) |
3（mg/L），Under special circumstances, it should not exceed 5mg/L② |
|
|
Toxicological indicators |
Arsenic |
0.05（mg/L） |
|
Cadmium |
0.005（nlg/L） |
|
|
Chromium (hexavalent) |
0.05（mg/L） |
|
|
Cyanide |
0.05（mg/L） |
|
|
Fluoride |
1.0（mg/L） |
|
|
lead |
0.01（mg/L） |
|
|
HG |
0.001（mg/L） |
|
|
Nitrate (in N) |
20（mg/L） |
|
|
Selenium |
0.01（mg/L） |
|
|
Carbon tetrachloride |
0.002（mg/L） |
|
|
Chloroform |
0.06（mg/L） |
|
|
Bacteriological indicators |
Total number of bacteria |
100（CFU/mL）③ |
|
Total coliform |
Not detected in every 100mL water sample |
|
|
Fecal coliforms |
Not detected in every 100mL water sample |
|
|
Free residual chlorine |
After being in contact with water for 30 minutes, it should not be lower than 0.3mg/L, and the water at the end of the pipe network should not be lower than 0.05mg/L (for chlorination disinfection) |
|
|
Radioactivity Index④ |
Total α radioactivity |
0.5（Bq/L） |
|
Total β radioactivity |
1（Bq/L） |
|
|
Note: ① NTU in the table is the scattering turbidity unit. ② Special circumstances include water source restrictions and other circumstances. ③CFU is the colony forming unit. ④ The specified value of the radioactivity index is not a limit value, but a reference level. When the radioactivity index exceeds the value specified in Table 2-1, nuclide analysis and evaluation must be carried out to determine whether it can be consumed. |
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◉ Compliance Services
As a professional third-party testing and certification service organization, Jiayu Testing has qualifications such as CMA, CNAS, and occupational health technical service institutions. In the field of environmental testing, it currently has more than 1000 CMA testing parameters, covering water and wastewater, air and exhaust gas, soil and sediment, noise and vibration, and solid waste toxicity identification. The laboratory is built and managed strictly in accordance with standards, equipped with advanced instruments and equipment, and has a professional technical team with superb skills. It has rich industry service experience and strong testing technology capabilities. Based on the principles of objectivity and fairness, it provides authoritative testing reports with legal effect to the society, and provides full chain environmental risk management support for enterprises and regulatory departments. Welcome to contact us at 400-9269-886!
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