You need to understand that EPA does not approve water filters. According to information on EPA's website, it only “requires registration of home water treatment unit filters that incorporate a disinfectant to inhibit microbial growth” such as water purifiers.
Don't fall for advertising deceptions that a certain water filter is approved by EPA. National Sanitation Foundation (NSF) International and other independent organizations will certify home water treatment units.
NSF performs rigorous testing on the treatment units and filter media to make sure they perform according to manufacturers’ claim. They make unannounced visits to water filter companies every year to make sure the claims are still true.
Water filters may be certified for one or multiple water contaminants. If you are concerned with taste and odor, metals, nutrients, fluoride, lead, or sediment in your water, you can always find an NSF-certified water filter system that meets your need. Some are labeled as NSF/ANSI or UL certified. Read the water filter descriptions for information; but most often you will see a bold NSF logo on the box.
(waterfilters-camping-water-purifier.com)
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