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Filters are certified to reduce non-health related contaminants: chlorine, taste, odor, and particulates that might be in your drinking water.
This standard is specifically for Reverse Osmosis filtration systems. These systems use pressure to force water through a semi-permeable membrane, leaving some of the smallest contaminants behind. A few of the most commonly asked about contaminants removed by Reverse Osmosis are Fluoride, Hexavalent Chromium, Arsenic, and Nitrates/Nitrites.
This standard certifies filters that reduce specific health-related contaminants: cryptosporidium, giardia, lead, and volatile organic compounds (VOCs). These contaminants are regulated by the U.S. Environmental Protection Agency (EPA).
This standard was specifically developed for the removal of PFOA/PFOS (a contaminant used in the production of non-stick cookware). Filters with this certification meet strict material safety and structural requirements to ensure these contaminants are removed.
When a water filtration system removes up to 15 individual contaminants such as prescription drugs, over the counter medications like ibuprofen and Naproxen, herbicides and pesticides, as well as other chemical compounds like BPA, itâ€™s certified to NSF Standard 401.
NSF uses this standard for Microbiological filters that remove bacteria and viruses from your water. This is helpful for families with private well water or in areas that receive boil warnings from the city.