Lab Testing in Hawaii

Last verified: March 2026

Testing Is Required for All Products

Under HRS §329D-8 and HAR 11-850 (interim rules, updated December 6, 2024), every batch of cannabis produced by Hawaii's 8 licensed dispensaries must be tested by an independent, certified laboratory before it can be sold to patients. This mandatory testing program ensures that products are accurately labeled, free of harmful contaminants, and safe for medical use.

Hawaii has relatively strict testing requirements compared to many other states. Because each dispensary is vertically integrated — growing, processing, and selling its own products — testing provides a critical independent check on the entire supply chain.

What Labs Test For

Hawaii's cannabis testing program covers several categories of analysis. Every production batch must pass all required tests before the dispensary can make the product available for sale.

Potency Analysis

Potency testing measures the concentration of cannabinoids in the product, including:

• THC (delta-9-tetrahydrocannabinol) — the primary psychoactive compound, expressed as a percentage for flower and concentrates or in milligrams for edibles and tinctures
• CBD (cannabidiol) — a non-intoxicating cannabinoid with therapeutic applications, measured the same way
• THCA and CBDA — the acidic precursors that convert to THC and CBD when heated

Potency results determine what appears on the product label. Accurate potency data is essential for patients to dose correctly — especially for edibles, where the difference between 5 mg and 25 mg of THC can dramatically change the experience. For details on reading potency numbers, see Reading Labels.

Pesticide Screening

Labs test for the presence of pesticides, herbicides, and plant growth regulators that could pose health risks when consumed, especially through inhalation. Hawaii's testing standards specify a list of prohibited chemicals and allowable thresholds for others. Products that exceed these limits fail testing and cannot be sold.

Heavy Metals

Cannabis plants can absorb heavy metals from soil and water. Labs screen for metals including:

• Lead
• Arsenic
• Cadmium
• Mercury

Products must fall below established action limits for each metal. This testing is particularly important because heavy metals accumulate in the body over time with repeated exposure.

Microbial Contaminants

Microbial testing identifies harmful bacteria and fungi that could cause infections or illness, especially in immunocompromised patients. Labs screen for organisms including:

• E. coli
• Salmonella
• Aspergillus (a mold genus particularly dangerous for patients with weakened immune systems)
• Total yeast and mold counts

Mycotoxins

Mycotoxins are toxic compounds produced by certain molds. Even after a mold colony is no longer visible, mycotoxins can remain in the plant material. Labs test for aflatoxins and ochratoxin A, among others — substances classified as carcinogenic by the World Health Organization.

Residual Solvents

Concentrate and edible manufacturing often involves chemical solvents (such as butane, propane, or ethanol) to extract cannabinoids from plant material. Residual solvent testing ensures these chemicals have been properly removed to safe levels before the final product reaches patients. This test applies primarily to concentrates, vape cartridges, and other extracted products.

Batch Testing

Hawaii requires batch-level testing — meaning every distinct production run must be tested separately. A dispensary cannot test one batch of a product and apply those results to a different batch. Each batch receives a unique lot number that appears on the product label, linking every unit sold back to its specific test results.

This approach creates a traceable chain from cultivation through production, testing, and sale. If a problem is discovered with a particular batch, the lot number allows the dispensary and the Department of Health to identify and recall all affected products.

Laboratory Independence

Under Hawaii law, testing laboratories must be independent from and not affiliated with any dispensary licensee. This separation is a critical safeguard — a dispensary cannot test its own products. Labs must be certified and meet the standards established by the Department of Health to operate in the state's medical cannabis testing program.

How to Read Test Results

Test results are reflected on the product label and, in many cases, available in more detail through a Certificate of Analysis (COA) that the dispensary can provide upon request. A typical COA includes:

• Cannabinoid profile — detailed potency breakdown by compound
• Terpene profile — identification and concentration of major terpenes
• Contaminant results — pass/fail status for pesticides, heavy metals, microbials, mycotoxins, and residual solvents
• Batch and sample identifiers — linking the COA to the specific product lot
• Lab name and certification — identifying the testing facility

Patients can ask their dispensary for a COA for any product. This is especially useful for patients managing specific conditions who need precise cannabinoid and terpene information beyond what fits on a product label.

Regulatory Framework

Hawaii's testing requirements are governed by two primary sets of rules:

• HRS §329D-8 — the statutory authority requiring laboratory testing of all cannabis products before sale
• HAR 11-850 — the interim administrative rules (updated December 6, 2024) that set specific testing standards, analyte lists, and action limits

The full interim rules are available at: HAR 11-850 (December 2024 update).

HRS §329D-8 requires all cannabis products to be tested by an independent certified laboratory before sale. HAR 11-850 (updated December 6, 2024) establishes specific testing standards for potency, pesticides, heavy metals, microbials, mycotoxins, and residual solvents.

Hawaii DOH — OMCCR