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HOME WATER TREATMENT <br />Water treatment units and the contaminants they treat <br />This table shows the most common home water treatment units and the contaminants the units can remove. Learn <br />more about the treatment units and cost estimates on the following pages. <br />• = designed to fully or partially remove <br />O = may partially remove <br />Color, taste, or odor issues <br />Ammonia <br />Arsenic2 <br />Bacteria3 <br />Calcium <br />Chloride <br />Chlorine <br />Copper <br />Fluoride <br />Hydrogen sulfide <br />Iron <br />Lead <br />Magnesium <br />Manganese <br />Methane <br />Nitrate <br />Nitrite <br />Other dissolved solids (ODS) <br />Pesticides and other synthetic organic compounds (SOCs) <br />Perfluoroalkyl substances (PFAS) <br />Radium <br />Radon <br />Selenium <br />Sodium <br />Sulfate <br />Trichloroethylene (TCE) <br />Trihalomethanes (THMs) <br />Uranium <br />Vinyl chloride <br />Viruses3 <br />Volatile organic compounds (VOCs) <br />Adsorptive media filtration' <br />• <br />o • • Aeration and filtration <br />Anion exchange' <br />Carbon filter' <br />• <br />Continuous chlorination and <br />• <br />0 <br />• <br />• <br />c <br />0 <br />CO <br />4- <br />c <br />0 <br />• <br />• <br />• <br />• <br />• <br />• Oxidizing media filtration <br />• <br />• Ozonation and filtration <br />• <br />• <br />Reverse osmosis <br />• <br />• <br />• <br />• <br />• <br />Ultraviolet (UV) disinfection <br />Water softening <br />• <br />• <br />• <br />• <br />• <br />• <br />• <br />• • <br />• • <br />• <br />• • <br />• <br />• <br />• <br />• <br />• <br />• <br />• <br />• <br />• • <br />• <br />• <br />• <br />• <br />• <br />• <br />• <br />• <br />• <br />• <br />• <br />• <br />0 • <br />• <br />• <br />• <br />• <br />• <br />• <br />• <br />• <br />• <br />• <br />• <br />• <br />• <br />• <br />• <br />• <br />• <br />• <br />• <br />• <br />• <br />• <br />• <br />• <br />• <br />• <br />• <br />• <br />• <br />• <br />• <br />• <br />• <br />• <br />• <br />• <br />1 The substances that these technologies reduce or remove depends on the filter media or resin. <br />2 There are two types of arsenic in Minnesota groundwater: arsenic(III) and arsenic(V). Pre -oxidation (chlorination, aeration, or <br />ozonation) may be needed before water treatment to make sure the treatment removes the type of arsenic present in your water. <br />Sulfate levels above 100 parts per billion may also affect what type of water treatment will remove arsenic. MDH recommends <br />working with a water treatment professional to make sure your treatment unit/system effectively removes arsenic. <br />3 If you are using a filter, make sure your filter has the necessary pore size for the bacteria or virus you are trying to remove. <br />3 <br />