To help address concerns about the safety and performance of products sold worldwide and marketed for treating household water supplies, NSF International developed several American National Standards covering a wide array of water treatment systems, including:

  • Filters (whole house, drinking water and shower units)
  • Reverse osmosis systems
  • Water softeners
  • Distillation systems
  • Ultraviolet disinfection products and microbiological purifiers

Select one of the links above to learn more about NSF’s certification and why it’s important for home water treatment systems.