Detection of Haloacetic Acid in Swimming Pool in Haikou and Its Influencing Factors

Chlorine disinfection is a commonly applied disinfection products due to its effectiveness, strong disinfection ability, and low cost. The objective of this study is to investigate the occurrence of haloacetic acids (HAAs), a group of disinfection byproducts, in swimming pool and spa water, and analyze its influencing factors, so as to provide reference to understand the pollution status of haloacetic acid (HAAs) disinfection byproducts in swimming pool water in Haikou, for the formulation of hygienic standards and sanitation management of HAAs in swimming pool water. The samples were collected from 18 swimming places with sanitary licenses in Haikou. For a period from April to July 2022. High performance liquid chromatography -tandem mass spectrometry (HPLC-MS) was used to detect the concentration of HAAs in swimming pool water, and its influencing factors were also analyzed. . Results indicated that the levels of average concentration of HAAs in indoor and outdoor swimming pools were 176.20 μg•L-1 and 241.53 μg•L-1, respectively. There were differences in the levels of HAAs in indoor and outdoor swimming places (p<0.05). The Pearson correlation analysis showed that the concentration of HAAs was positively correlated with free chlorine and urea (p<0.05). The water quality and sanitation of the swimming pools in this survey were somewhat poor. It is necessary to formulate the regulation of HAAs in the swimming pool sanitation standards, strengthen the water quality sanitation management, and take further effective measures to reduce the concentration of HAAs to protect swimmers.