Reverse Osmosis Water Filters Buyer's Guide
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  We review, analyze and compare the best water filters in the industry including reverse osmosis systems, faucet filters, water distillers, pitcher filters, whole house filters, water softeners, shower filters, bottled waters and more.

Water Filtration Methods Comparison


There are a wide range of water filters, purifiers, and methods of water purification available on the market today. In reality, there is no single filter or treatment that will eliminate 100% of every contaminant from your water. Many technologies target only a specific type of contaminant and may be completely ineffective against others. Typically, most higher-end systems use a combination of filter technologies to achieve the best results. It is nevertheless important to choose a system that specifically targets the known or potential contaminants in your personal water supply.

To help you gain a better understanding of each major home water purification technology, please consult the Comparison Chart below. Compare your water testing results to the chart and information to determine your best filtration /purification options.

DiseaseElement Causing DiseaseReverse Osmosis RO Ion ExchangeDistillationActivated CarbonPrecipitationUltra-VioletBoiling
Cancer InitiationChlorinexBxxx
pH In-equilibriumAlkali FumeAxxxx
Cancer InitiationChloroformxBxxx
Bacteria Infections DiseaseBacteriaxBx
Virus Infections DiseaseVirusesxxx
Intoxication, Liver DiseaseAgricultural Chemicalsxxxx
CancerRadioactive MaterialAABxxxx
AnorexiaTaste and Odorxxxxx
Calculus, EnteritisPrecipitatexBxx
PoisoningOrganic SubstancesxBxxx
Cancer InitiationFluorideAAxxxx
Cancer InitiationFluorescencexxxxxx
Nephrosis, Leading PoisoningLeadAAxxxx
Organic Phosphorus PoisoningPhosphorusAAxxxx
Electrolyte In-equilibriumPotassiumAAxxxx
Hypersensitive Heart DiseaseSodiumAAxxxx
Digestive System DiseaseSulphurAAxxxx
Digestive System DiseaseMagnesiumAAxxx
=98-99% Removal ; A =96-99% Removal; B =Partial Removal; x =Can not Remove