Ultraviolet Systems (UV) have a kill rate of 99.9% of bacteria.
Larger and smaller sizes as well as 220 volt systems are available.
We do not overstate the flow rate capabilities of these systems as other companies do, so make sure you are making a like for like comparison before buying!
Turbidity, Iron, Manganese, Sulfur and Hardness must all be removed ahead of a UV system for it to be effective.