ARM 37.115.1821. SPA SANITATION REQUIREMENTS

(1) All disinfectant equipment shall be approved by the NSF International and shall be capable of introducing a sufficient quantity of sanitizer to maintain the minimum required levels of sanitizer under all conditions of intended use. (2) Disinfectant levels for spas shall be 2-8 ppm for chlorine or 2-10 ppm bromine at all times.