This study was aimed at investigating the effects of water treatment on microbial and physicochemical properties of swimming pools in Delta Central Senatorial district considering the great importance of the safety of recreational water. A total of 108 water samples were collected from three swimming pools before and after use from three hotels in Delta Central Senatorial District using sterile bottles with capacity of one liter for a period of three months, and were immediately transported to the laboratory for analyses using standard techniques to analyze for physico-chemical parameters and microbial parameters. The results obtained showed that the physico-chemical parameters were within the World Health Organization and Environmental Protection Agency recommended values before and after use with variation among sites 1, 2, and 3. The mean bacterial count ranged between 0.00cfu -2cfu before use and 0.00cfu-214cfu/100ml after use. Bacterial isolates were susceptible to calcium hypochlorite concentration at 0-5ppm,6-10ppm and 11-15ppm except Staphylococcus aureus which ensued at site 2 before use. The findings suggested that contamination of pool water can be minimized by promoting good hygiene, education, adequate disinfection of the pool and enforcement of recommended guidelines at regular intervals to ensure proper control of microbial and chemical conditions.
