Comparison of Different Water Purification Methods

Functions	Pentair Everpure Filtration	Ultraviolet + Prefilter + Carbon Filter	Ceramic Filter	Water Boiling	Bottled Distilled Water
Remove Bacteria	✓	Not Guaranteed	Not Guaranteed	Need to boil water for at least 20 minutes to kill germs and bacteria thoroughly	✓
Remove Chlorine	✓	Not Guaranteed	Not Guaranteed	Not Guaranteed	✓
Eliminate other chemical toxicants	✓	Not Guaranteed	Not Guaranteed	✖	✓
Remove impurities and organic contaminants	✓	Not Guaranteed	Not Guaranteed	✖	✓
Reduce unpleasant taste and odor	✓	Not Guaranteed	Not Guaranteed	✖	✓
With crisp taste	✓	Not Guaranteed	The water lacks crisp taste after boiling	The water lacks crisp taste after boiling	The water lacks crisp taste
Professional Certification	Rated as top-notch drinking water by NSF International and US Environmental Protection Agency	UV wavelength 253.7 nm is needed for killing bacteria Efficiency will be diminished by time Hard to define the standard	Standards vary from brand to brand	✖	Few brands are NSF certified
Convenience	Sanitary cartridge replacement is simple, quick and clean Internal filter parts are never exposed to handling or contamination	Regular water tests and UV tube replacement are required Built-in tubes cannot be replaced Frequency of filter replacement varies for different brands	Need to wash the case and the liner during filter replacement The pores will easily be damaged during washing There are unreachable parts that cannot be cleaned	It takes time for the boiling and cooling of water before drinking	Manpower is needed for delivery Storage space is required
With no power or fuel oil consumption	✓	Continuous supply of electricity is needed for UV tube Water Boiling is required	✖ Water Boiling is required	✖ Water Boiling is required	✓
Cost Effectiveness	$0.08 – $0.25/litre	24小時耗電 $0.35 – $0.5/litre	$0.25 – $0.5/litre	$0.25/litre	$20-60/carboy (18.9 litres) $1 – $3/litre