World Health Organization
NSF is a Pan American Health Organization/World Health Organization Collaborating Center on Water and Food Safety.

Our collaboration includes:
- Secondments. SF has experts in Ann Arbor, Michigan, to help carry out the important work of the WHO. Secondees serve as WHO employees providing needed technical and financial support to advance public health worldwide.
- WHO Guidelines for Drinking Water Quality. NSF supported work and contributions to the third and fourth editions of the WHO's Guidelines for Drinking-water Quality.
- Airline Water Safety. An NSF secondee led the effort to develop an international guidance document on the safety considerations of all aspects of international airline water quality.
- Water Safety Plans. An NSF secondee spent several years advancing water safety plans and helping to develop the audit tools and training necessary to carry out this important work.
- Home Water Treatment. NSF contributed to the development of technical requirements for the effective evaluation of low-cost home water treatment systems for global use.
- Codex Alimentarius. NSF is an observer to the Codex Alimentarius, supporting the WHO and the Food and Agriculture Organization of the United Nations (FAO), providing scientific advice and expertise. Additionally, NSF serves as a member of the Joint Scientific Observer Codex Group, working jointly with other scientific organisations to provide joint comments on key issues being considered by Codex.