Section 444.476 - Quality of waterThe spa equipment must provide water meeting the following standards:
1. The water must be continuously disinfected by a chemical which imparts an easily measured, freely available residual effect. Adequate disinfection may be accomplished by: (a) Normal chlorination 1.0 to 5.00 ppm (1.0 to 5.0 mg/l) of free chlorine at pH 7.0 to 8.0.(b) Chlorinated cyanurate chlorination 1.0 to 5.00 ppm (1.0 to 5.0 mg/l) at pH 7.2 to 8.0.(c) Normal bromination 3.0 to 5.0 ppm (3.0 to 5.0 mg/l) at pH 7.0 to 8.0.2. The health authority may accept another disinfecting material or method when it has been adequately demonstrated to the health authority that it provides a satisfactory residual effect which is easily measured, and that it is otherwise as effective under conditions of use as the chlorine concentration required in this section.3. The maximum permissible concentration of cyanuric acid is 100 ppm (100 mg/l).4. The total alkalinity should be within the range of 80 to 120 ppm (80 to 120 mg/l), but alkalinity must not exceed 150 ppm (150 mg/l).5. The chemical quality of water in the spa must not cause objectionable physiological effects to bathers.Nev. Admin. Code § 444.476
Bd. of Health, Public Spa Reg. Art. 17 §§ 17.4-17.4.4, eff. 11-27-79-NAC A 11-2-88