Section 28 in Tamil Nadu Urban Local Bodies (Regulation and Monitoring of Swimming Pools) Rules, 2015
28. Water Quality.
(1)The clarity of water shall be that a 4 inch black-and-white object in the deepest water is clearly visible from the pool deck. The pH of the pool water shall be between 7.2 and 8.0 and the free residual chlorine count shall be from 0.6 to 1.5ppm depending on the pH.(2)Disinfection. - (i) The area around the pool must be cleaned and disinfected regularly.(ii)In order to prevent the transmission of contagious diseases, the water in the pool must have powerful and lasting disinfectant properties.(iii)Water in the swimming pool must comply with the following requirements for safety and swimmers' comfort, namely :-(a)The water shall be transparent, that is, the lane marked on the bottom of the pool shall be clearly visible and a dark object (measuring 0.30 m along each side) placed in the deepest part of the pool shall be easily discernible.(b)The water shall not irritate the eyes, skin, or muscle membranes.(c)The quantity of substances that oxidize in hot potassium permanganate in an alkaline medium, expressed as oxygen shall must not exceed the levels present in the water used to fill the swimming pool by more than 4 mg/ ltr.(d)The water shall not contain substances which may affect the health of swimmers.(e)The pH of pool water shall be contained between 7.2 and 8.0(f)In one milliliter of water, the number of aerobic bacterial revival at 37 degree centigrade shall be less than 100.(g)In 100 milliliter of water the number of total coli-forms shall be less than 10 and no fecal coli-forms shall be present. Milliliter samples taken from pool water shall be free of pathogenic staphylococcus germs.(h)The water shall be disinfected and also act as a disinfectant.(i)The water shall contain no pathogenic germs.(3)Disinfectant Residual. - (i) Where chlorine is used as a disinfectant, the chlorine residual shall be maintained between 1.0 and 4.0 ppm. as free chlorine residual. A free chlorine residual of at least 2.0 ppm. shall be maintained when the pool water temperature exceeds 30o C.(ii)Where bromine is used as a disinfectant, a bromine residual shall be maintained between 2.0 and 8.0 ppm. as total bromine. A bromine residual of at least 4.0 ppm. shall be maintained when the pool water temperature exceeds 30o C.(iii)Where chlorinated cyanurates are used, the cyanuric acid concentration shall not exceed 100 ppm.(iv)Where silver/copper or copper ion generators are used, the concentration of copper shall not exceed 1.3 ppm. and the concentration of silver shall not exceed 0.05 ppm.(v)Where ozone is used, the ambient air ozone concentration shall be less than 0.1 ppm. at all times either in the vicinity of the ozonator or at the pool water surface.(vi)For all other physical, chemical and bacteriological parameters, the quality of water used in swimming pools in continuous circulation type shall conform to IS 3328:1993.
