- Centers for Disease Control and Prevention
- US Consumer Product Safety Association
- US Environmental Protection Agency
- US Food and Drug Administration
- US Department of Health & Human Services
- National Oceanic Atmospheric Administration
- Nuclear Regulatory Commission
- National Research Council of Canada
- National Science Foundation
- U.S. Department of Agriculture
- Health Canada
- Public Health Agency of Canada
- American Association for Advancement of Science
- Association for the Advancement of Medical Instrumentation
- American Chemical Society
- American Council on Science and Health
- American Institute of Chemical Engineers
- American Institute of Chemists
- American Membrane Technology Association
- American National Standards Institute
- American Public Health Institute
- American Pharmacist Association
- Association of Public Health Laboratories
- American Petroleum Institute
- American Supply Association
- Association of State Drinking Water Administrators
- American Society of Mechanical Engineers
- Association of State & Territory Health Officials
- American Society for Testing and Materials
- Association of Water Technologies
- American Water Works Association
- College of American Pathologies
- Center for Infectious Disease Research & Policy
- Canadian Institute of Plumbing & Heating
- Clinical and Laboratory Standards Institute
- Canadian Water Quality Association
- Canadian Water Resources Association
- Canadian Water & Waste Water Association
- Electric Power and Research Institute
- Ground Water Protection Council
- International Association of Plumbing & Mechanical Officials
- International Bottled Water Association
- International Confederation of Contamination Control Societies
- International Ozone Association
- International Ultraviolet Association
- Millennium Water Alliance
- National Association of County & City Health Officials
- National Association of Local Boards of Health
- National Academy of Sciences
- National Association of Water Companies
- National Environmental Health Association
- National Ground Water Association
- National Rural Water Association
- Plumbing-Heating-Cooling Contractors Association
- Ontario Ground Water Association
- Public Health Foundation
- Public Health Institute
- Plumbing Manufacturers Institute
- United States Pharmacopeia
- Valve Manufacturers Association of America
- Water Environment Federation
- Water Environment Research Foundation
- Water For People
- World Health Organization
- World Plumbing Council
- Water Quality Association