Detection of drinking water detection parameters

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What are the water quality testing indicators and parameters for drinking water? The water quality parameters that need to be tested for the tap water network management are as follows:

 

1. Residual chlorine

Residual chlorine refers to the amount of chlorine that is consumed after being added to water, in addition to reacting with bacteria, microorganisms, organic matter, and inorganic matter in the water. The remaining amount of chlorine can be called residual chlorine.

If there is no chlorine in the factory water or the amount of chlorine added is insufficient, the transportation process of tap water may cause bacteria, Escherichia coli, and other microorganisms to multiply too quickly, resulting in a decrease in water quality. Therefore, a certain amount of residual chlorine should be ensured in the water supply network. So maintain a certain amount of residual chlorine in municipal tap water to ensure the microbial indicators of drinking water

According to the "Sanitary Standards for Drinking Water" in China, after 30 minutes of contact between chlorine and water, the concentration should not be lower than 0.3mg/L. In addition to the factory water, the concentration of centralized water supply should not be lower than 0.05mg/L for the end water of the pipeline network

In addition, if the residual chlorine concentration in tap water is high, attention should be paid to the following issues:

1. Enhanced irritation and significant odor

2. It is easy to react with organic substances in water and generate substances that affect health

3. The residual chlorine indicator requires the water body to be regularly disinfected and free from odors

 

2. Turbidity

Turbidity refers to the degree of turbidity in water, which is a measure of the decrease in transparency caused by insoluble substances in water.

. Insoluble substances include solid particles (sediment, corrosive substances, planktonic algae, etc.) and colloidal particles suspended in water. It is related to the composition, particle size, shape, surface reflection performance, and content of impurities in water. Reducing turbidity also reduces bacteria, Escherichia coli, viruses, cryptosporidium, iron, manganese, etc. in the water. Research has shown that when the turbidity in water is 2.5 NTU, 27.3% of the organic matter is removed, and when the turbidity drops to 0.5 NTU, 79.6% of the organic matter is removed. When the turbidity is 0.1 NTU, most of the organic matter is not present, and there are few pathogenic bacteria

 

III. pH value

pH is an important parameter for evaluating water quality, and it can affect other indicators of water quality and water treatment efficiency as a whole. A low pH value can corrode water pipes, while a high pH value can cause dissolved salts to precipitate, reducing the effectiveness of chlorination disinfection. At the same time, long-term consumption of water with low or high pH can also have a certain impact on human physiological health

 

4. Conductivity

Conductivity is an indicator of the conductivity of a solution. Generally, the more impurities in water, the stronger the conductivity of the water. The conductivity value can reflect water quality indicators; The purer the water, the lower the conductivity

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