Swimming pool water quality monitoring

    With the improvement of people's living standards and the enhancement of health awareness, swimming as a healthy leisure activity is favored by more and more people.

    However, there are many problems with swimming pool water, such as substandard water quality, excessive levels of bacteria, viruses, parasites and other harmful substances in the water. Substandard water quality may cause health problems for swimmers and even spread infectious diseases.

    Therefore, it is necessary to monitor the pool water quality regularly to ensure the health and safety of swimmers, prevent the spread of infectious diseases, and improve the swimming experience.

Swimming pool water quality monitoring process

1. pH: Overly acidic or alkaline water can easily irritate swimmers' eyes and skin. The national pH standard for swimming pool water is between 7.2 and 7.8.

2. Turbidity: The clarity of the pool water. When the content is too high: ① It is difficult to see the bottom of the pool, which affects the swimming line of sight and is likely to cause accidents or delay emergency work; ② Too many particles may hurt the swimmer's eyes; ③ The water contains a large number of various microorganisms, which may transmit diseases. It is usually kept within ≤0.5 NTU.

3. Residual chlorine/ozone: To ensure the continuous disinfection of swimming pool water, inhibit the reproduction of residual bacteria in the water, and prevent the spread of infectious diseases and cross infection. Residual chlorine is usually required to be 0.3-1.0 mg/L.
4. Water temperature: The comfortable water temperature should be 20-30℃. The human body will easily feel uncomfortable if the water temperature is too low or too high.

5. ORP: Measures the effectiveness of swimming pool water disinfection. The bactericidal effect of E. coli in water is affected by the redox potential. The limit value varies depending on the disinfection process. When using chlorine and ozone disinfection, the ORP is usually ≥ 700 mV. When using hydrogen peroxide disinfection, it is usually in the range of 200-300mV.