A. The National Science Foundation International (NSF) (www.nsf.org) is an independent, non-profit public health and safety organization that is commissioned to the US government. NSF is dedicated to being the leading global provider of public health and safety-based risk management solutions while serving the interests of all stakeholders, namely the public, the business community and government agencies. NSF mission is carried out by over 2,100 global employees, including microbiologists, toxicologists, chemists, engineers, and environmental and public health professionals. NSF provides independent testing, verification and certification of most Multipure drinking water systems and filters.