Washington State Liquor Control Board testing lab criteria for usable marijuana

The board is releasing the accreditation criteria that third party testing labs must meet in order to be certified as a lab allowed to test useable marijuana and marijuana products under the I-502 regulatory system.

The Board has contracted with the Center for Laboratory Sciences on the Campus of the Columbia Basin College to conduct the certification process. Below you will find links to:

Document Submission


Address:  Center for Laboratory Sciences on the Campus of the Columbia Basin College

ATTN: I-502 Lab Certification

2600 N. 20th Avenue

Pasco, WA 99301

The accreditation criteria, application package, certification process and cost are subject to change without notice.  If you have further questions regarding the accreditation criteria, certification process, application process, quality assurance testing or are interested in

becoming a certified lab please visit the WSLCB website at:


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