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Background: Health of swimming pools is important to maintain health of swimmers that in case of failure to comply of health standards, can be lead to health problems and the transmission of infectious diseases to swimmers. The purpose of this study was to evaluate the water quality of swimming pools in Sanandaj city and compare of their results with the national standards. Methods: In this cross – sectional study, 108 water samples were collected from 9 swimming pools of Sanandaj city. Some parameters including residual chlorine, pH, turbidity, hardness, alkalinity, temperature and also microbial parameters such as heterotrophic bacteria, staphylococcus aureus, pseudomonas aeruginosa, fecal streptococcus, total coliform, and fecal coliform were evaluated. Results: The results of the study showed that residual chlorine, pH, turbidity, hardness, alkalinity, and temperature in 80.5%, 72.2%, 60.1%, 52.7%, 30.5%, and 100% of samples, respectively, which were in desirable limit. Also the population of total coliform, fecal coliform, and Staphylococcus aureus in 32.4%, 45.3%, and 96.3% of samples, respectively, were in desirable ranges. Conclusion: Based on the results, turbidity, hardness, alkalinity, and also population of total coliform and fecal coliform of some samples didn’t have conformity with standards that indicates the need for continuous monitoring of swimming pools water quality.