United States

AOAC International
(Standard Microbiology Programs (MO1, MO8, MO9), Pathogen-Free Microbiology Program (MO2), Meat Microbiology Programs (MO3, MO4, MO5, M10), Nutrition Labeling Programs (CO1, CO2), Pesticide Residues in Fruits and Vegetables Program (PO1), Salmonella in Liquid Egg Program (E01))
301-924-7077 ext 153
LPTP@aoac.org

American Proficiency Institute (API)
(Aerobic Plate Count, Bacillus cereus, Campylobacter, Clostridium, Coliforms, E.coli (including O157:H7), Enterobacteriaceae, Lactic Acid Bacteria, Listeria, Mold, Salmonella, Coagulase Positive Staphylococcus, Yeast, Yeast and Mold)
800-333-0958
CustomerService@api-pt.com

United Kingdom

LGC Standards Proficiency Testing
(Food Microbiology Scheme (QMS))
LGC Standards Proficiency Testing
+44 (0) 161 762 2500
customerservices@lgcpt.com

Public Health England
Food and Environmental Proficiency Testing Unit (FEPTU)
+44 20 8327 7122
foodeqa@phe.gov.uk