50-53-115. Special requirements for flow-through hot springs pools. In addition to the other requirements of this chapter and rules promulgated under this chapter, flow-through hot springs pools must meet the following requirements:
(1) The temperature of the pool water must be 106 degrees F or less.
(2) The water must have sufficient clarity at all times so that a black disc, 6 inches in diameter, is readily visible when placed on a white field at the deepest point of the pool.
(3) The pool water must be maintained at a pH of no less than 7.2 and not greater than 9.4.
(4) The pool must provide sufficient water volume exchange to produce an 8-hour turnover of the entire volume of pool water to waste. In addition:
(a) the pool, and all surfaces that flow into the pool, must be drained, cleaned, and sanitized every 72 hours; or
(b) the pool must be disinfected, and a chlorine residual of 1 to 3 parts per million or a bromine residual of 3 to 6 parts per million must be maintained in the pool at all times.
(5) Signs must be prominently posted that specify pool rules and special health hazards associated with swimming or bathing in flow-through hot springs pools. The contents of the signs must be determined by department rule. The department, in developing rules under this section, shall consult with flow-through hot springs pool owners.