Everydrop refrigerator water filters are certified by NSF International to reduce a range of impurities and contaminants. To determine what type of contaminants a filter is certified to reduce, look for NSF Standard numbers.
Taste and odor: If you want to improve the taste and odor of your water, look for a filter certified to NSF Standard 42. A filter that meets this standard is certified to reduce aesthetic impurities such as chlorine.
Health-effects: For concerns about health, look for NSF Standard 53. This standard deals with health-related contaminants as regulated by the U.S. EPA and Health Canada. A few of the contaminants filtered include asbestos, mercury, and lead.
Emerging (or new) contaminants: NSF 401 covers filtration of emerging contaminants which include pharmaceuticals or chemicals not yet regulated by the EPA or Health Canada. These filters have been verified to reduce one or more of 15 emerging contaminants.
While some filters may qualify for one or two of these standards, everydrop filters 1-5 are certified for all three. Check your filter's [safety and performance data sheet] for detailed information on which contaminants your filter is certified to reduce.