Water passes through a clear chamber where it is exposed to Ultra Violet (UV) Light. UV light effectively destroys bacteria and viruses. However, how well the UV system works depends on the energy dose that the organism absorbs. If the energy dose is not high enough, the organism’s genetic material may only be damaged rather than disrupted.


  • No known toxic or significant nontoxic byproducts introduced
  • Removes some organic contaminants
  • Leaves no smell or taste in the treated water
  • Requires very little contact time (seconds versus minutes for chemical disinfection)
  • Improves the taste of water because some organic contaminants and nuisance
  • Microorganisms are destroyed
  • Many pathogenic microorganisms are killed or rendered inactive.
  • Does not affect minerals in water


  • UV radiation is not suitable for water with high levels of suspended solids, turbidity, color, or soluble organic matter. These materials can react with UV radiation, and reduce disinfection performance. Turbidity makes it difficult for radiation to penetrate water and pathogens can be ‘shadowed’, protecting them from the light.
  • UV light is not effective against any non-living contaminant, lead, asbestos, many organic
    chemicals, chlorine, etc.
  • Tough cryptosporidia cysts are fairly resistant to UV light.
  • Requires electricity to operate. In an emergency situation when the power is out, it will not
  • UV is typically used as a final purification stage on some filtration systems. If you are
    concerned about removing contaminants in addition to bacteria and viruses, you would still need to use a quality carbon filter or reverse osmosis system in addition to the UV system.