Cannabis Testing Labs in Washington
5 licensed cannabis testing laboratories in Washington. All labs listed are licensed by Liquor and Cannabis Board (LCB).
Data source: Washington State Liquor and Cannabis Board
Washington cannabis testing overview
Washington legalized recreational cannabis in 2012 alongside Colorado. The state publishes detailed license and sales data in multiple formats. All cannabis products sold in Washington must be tested for potency, contaminants, microbials, and (for concentrates) residual solvents by a lab licensed under Liquor and Cannabis Board (LCB). Look for ISO/IEC 17025 accreditation and currently valid state licensure when choosing a lab.
Confidence Analytics
Redmond, Washington
Integrity Labs
Olympia, Washington
Green Grower Labs
Spokane, Washington
Medicine Creek Analytics
Fife, Washington
Capitol Analysis
Olympia, Washington
Frequently Asked Questions
How many cannabis testing labs are in Washington?+
There are 5 licensed cannabis testing laboratories in Washington listed on CannaBizGuide. All labs are regulated by Liquor and Cannabis Board (LCB) and data is sourced from Washington State Liquor and Cannabis Board. The number of licensed labs can change as new facilities receive accreditation or existing labs lose their license.
What tests are required for cannabis products sold in Washington?+
Washington cannabis products must typically be tested for cannabinoid potency (THC, THC-A, CBD, CBD-A and often other cannabinoids), terpene profile (sometimes optional), pesticides, heavy metals, residual solvents (for concentrates), microbial contaminants, mycotoxins, and moisture content. Liquor and Cannabis Board (LCB) sets the specific analyte panels and action limits. Retest rules, homogeneity sampling, and label claim tolerances are also state-specific. See our testing requirements by state guide for the current WA panel.
How much does cannabis testing cost in Washington?+
Full-panel compliance testing in Washington typically ranges from a few hundred to over a thousand dollars per sample depending on matrix type (flower vs concentrate vs edible), panel scope, and turnaround. Bulk pricing and volume discounts are common for multi-state operators. R&D testing (not for compliance) is usually less expensive. Get quotes from multiple labs and confirm they can test ALL required matrices before committing.
What accreditations should a Washington cannabis lab have?+
At minimum, look for ISO/IEC 17025 accreditation from a recognized body (A2LA, PJLA, ANAB, or similar). Washington may also require specific state-level certification or licensing from Liquor and Cannabis Board (LCB). Some operators also look for ORELAP, EMLAP, or TNI certifications, particularly for specific analyte categories. Verify accreditation status directly with the accrediting body - do not rely on lab marketing alone.
What is the typical cannabis testing turnaround time in Washington?+
Standard compliance testing turnaround is usually 5-10 business days from sample receipt to reported Certificate of Analysis (COA). Rush service (48-72 hours) is available at most labs for a premium. Complex matrices (distillates, edibles with unusual excipients) and retest scenarios often take longer. Plan testing windows into your release schedule, especially around regulated harvest or batch-release deadlines.
How do I read a cannabis Certificate of Analysis (COA)?+
A cannabis COA reports pass/fail for each required analyte category plus quantified values (potency % and contaminant levels). Key things to check: batch number, sample intake date, testing methodology references (LC-MS/MS, GC-MS, qPCR), and that the lab's name and accreditation number match a currently-licensed lab. Beware of COAs from unaccredited or out-of-state labs. See our How to Read a Cannabis COA guide for a detailed walkthrough.