Prime Analytical Laboratories, LLC Nelson Avenue, Concord, Contra Costa County, California, United States Member since April 27, 2025
Vanguard Laboratory Parkmont Lane Southwest, Olympia, Thurston County, Washington, United States Member since December 26, 2024
Foundation Laboratory West Holt Avenue, Pomona, Los Angeles County, California, United States Member since October 28, 2024
Element Materials Technology – Midland, MI North Stark Road, Midland, Midland County, Michigan, United States Member since April 23, 2025
Consumer Product Testing Company, Inc. New Dutch Lane, Fairfield, Essex County, New Jersey, United States Member since July 10, 2024