The bath water of the pools is an element that can carry pathogens and substances capable of causing disease . It is a guarantee that the hygienic and sanitary pool water present: Absence of color and turbidity. No odors and flavors. Absence of toxic substances in harmful concentrations . Absence of pathogens. It is therefore necessary : Cleaning and disinfecting of the premises. Proper treatment of water. Proper personal hygiene of swimmers.