Haw. Rev. Stat. § 481H-2: Definitions.

As used in this chapter:

"Contaminant" shall be defined as provided in chapter 340E.

"Water treatment unit" means a product, device, or system designed for personal, family, or household use and for which a claim or claims are made stating that it will improve the quality of water by reducing one or more contaminants through mechanical, physical, chemical, or biological processes or combinations thereof.