Ultraviolet light (UV) is an effective means of disinfecting water. Ultraviolet light disinfects water by striking a microorganism with a 254Å (nm) wavelength of electromagnetic radiation at a specified intensity. This action disrupts the DNA preventing the microorganisms from reproducing and thus effectively killing it. Sunlight can disinfect water the same way.
Ohio Administrative Code (OAC) 3701-28-15 provides for the option to use UV as a primary means of disinfection for private water systems in Ohio. Only UV systems that meet The National Sanitation Foundation (NSF) Standard 55 Class “A” or the equivalent can be considered for approval as a means of primary disinfection of private water systems in Ohio.
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