| Asia | ||
|---|---|---|
 PSB Singapore |
 TüV SüD’s |
 IQ Net Association |
 Water Quality Association |
 SQS |
 Department of Agroindustrial Technology, Institute of Pertanian Bogor, Indonesia |
 Jiangsu Provincial Supervising & testing Research Institute for Products Quality, Jiangsu |
||
| USA | ||
 University of Arizona,USA |
 Department of Industry Labor and Human Relations ,Wisconsin, USA |
 University of Michigan Institute of Environmental & Public Health, Ann Arbor, Michigan, USA |
 Harvard University,Dept.of Applied Sciences, Cambridge, USA |
Spectrum Laboratories, Minnesota, USA | |
| Europe | ||
 Institut Bachema, Switzerland |
 Swiss Tropical Institute, Basle, Switzerland |
 University of Basle Institute of Hygiene ,Switzerland |
 Insitute Pasteur Lille, France |
 Bernhard-Nocht-Institute, Hamburg, Germany |
Laboratory of Central Brunnen, Switzerland |
| Others | ||
 South African Bureau of Standards ,Pretoria, South Africa |
 National Water and Sewerage Corporation, Kampala, Uganda |
Laboratorio Clínico Lima, Perú |
| Instituta Nacional de Higiene y Medicina Tropical, Guayaquil, Ecuador | ||