Background& Objective: Swimming is great exercise and entertainment and enjoyment for people of all ages, especially in the hot season. Due to health issues and ways to ensure the health and welfare of people, swimming pools are very important. Therefore, in this study, relationship between the capacity and area of the pool with microbial contamination and heterotrophs were investigated.
Materials and Methods: This study, based on applied research and analytical - descriptive, correlational, cross-sectional survey was conducted. In this project, we studied 35 swimming pools in the city of Karaj. For this purpose, samples were collected every month for 9 months, turbidity, pH, free residual chlorine was measured at the sampling time and testing for total coliform, E.coli coliform and counting of hetrotrophic organisms in the laboratory of water and wastewater was performed. Data was analyzed by using SPSS software and peyerson analytical.
Results: Frome the 315 coliform samples about 90.2% was pure. Of the 315 tested HPCs, 99.7 percent was found in the clean range. The minimum HPC reported is zero, at most 250 with an average of 18/11 and a standard deviation of 266.68. Peyerson correlation test between heterotrophic bacteria with water turbidity and area to swimmer also has a significant relationship. In this study, there was no significant relationship between swimming pool pollution with pool area.