Reverse Osmosis (RO) filters are generally considered to remove the most contaminants compared to other water filters. By forcing water through a semipermeable membrane, RO systems eliminate many impurities, including dissolved solids, bacteria, viruses, and chemicals.

UV (ultraviolet) disinfection systems are also highly effective at removing contaminants from water, particularly biological ones like bacteria, viruses, and protozoa. These systems use UV light to inactivate microorganisms, rendering them harmless without altering the water’s taste or adding chemicals.