Hemp Compliance Testing: What Producers Need to Know

Hemp testing requirements are more layered than many producers expect. The federal baseline applies to everyone, but state programs often add their own requirements on top. And once you move into processing and finished products, a different set of tests becomes relevant. Here is a practical overview of what you are actually required to test, and when.

Note: requirements vary by state and program. Always verify current rules with your state department of agriculture or hemp program administrator.

Federal Baseline: The USDA Hemp Production Program

Under the 2018 Farm Bill, all licensed hemp producers operating under USDA-approved state or tribal plans are required to test their hemp crops before harvest. The key requirements:

• Pre-harvest THC testing is mandatory. Hemp must be sampled and tested within 30 days of the anticipated harvest date.
• Testing must be performed by a DEA-registered laboratory for producers under the USDA federal plan (some state-plan states have different requirements).
• Delta-9 THC must not exceed 0.3% on a dry-weight basis. Crops that test above this threshold are considered non-compliant and must be disposed of.
• Sampling is typically conducted by a state or tribal official, or an approved third party, not by the producer.

If your operation is licensed under a USDA-approved state plan rather than the federal plan directly, your state may have additional or slightly different sampling and testing procedures. Check with your state department of agriculture for the specific protocol that applies to you.

State-Level Hemp Program Requirements

Many states with active hemp programs have layered additional testing requirements on top of the federal baseline. These vary significantly by state, but common additions include:

• Additional cannabinoid testing beyond delta-9 THC (some states require total THC, which includes THCA converted via decarboxylation)
• Required use of state-approved or state-licensed labs
• Specific sampling protocols or chain-of-custody documentation
• Separate requirements for industrial hemp (fiber, grain) vs. cannabinoid hemp (flower, extract)

If you are shipping hemp samples to a lab in another state, confirm that your state program accepts COAs from out-of-state accredited labs. Most do, provided the lab holds ISO/IEC 17025 accreditation, but verify before submitting results to your state agency.

Product Compliance Testing for Processors

If you are extracting, formulating, or selling hemp-derived products (oils, tinctures, topicals, edibles, concentrates), pre-harvest THC testing alone is not sufficient. Finished product testing typically includes:

• Potency: delta-9 THC and CBD content for labeling accuracy
• Microbiology: screening for pathogens (Aspergillus, Salmonella, E. coli, Listeria) is required by most state programs for ingestible products
• Pesticide screening: required for products intended for retail sale in most regulated markets
• Residual solvents: required for any product processed using chemical solvents (butane, ethanol, propane, etc.)
• Terpene profiling: not a compliance requirement, but increasingly expected by buyers and retailers for premium products

Retailers and distributors in regulated markets will often request a COA covering all applicable panels before accepting product. Having a complete, clean COA from an accredited lab is one of the most effective ways to protect your shelf space and build credibility with buyers.

Why Accreditation Matters

ISO/IEC 17025 accreditation is the international standard for testing and calibration laboratories. For hemp producers, it means two things in practice:

1. Your results will be accepted. State agencies, buyers, and retailers typically require COAs from accredited labs. Results from non-accredited labs may not satisfy regulatory requirements or buyer due diligence.
2. The methods are validated. An accredited lab has demonstrated to an independent accreditation body that its testing methods, equipment, and staff meet rigorous technical standards. That validation is reflected in the reliability of your COA.

When evaluating a lab, ask for their accreditation certificate and confirm it is current. The certificate should list the specific test methods covered by the accreditation.

Building Testing into Your Timeline

One of the most common mistakes hemp producers make is treating lab testing as an afterthought. Testing takes time, and results are not always a pass on the first attempt. A practical timeline approach:

• For pre-harvest testing, begin the sampling process at least 45 days before your planned harvest date to allow time for results and any required remediation discussions.
• For processed product, submit samples to the lab before committing to a delivery schedule with buyers or retailers. A failed COA with a firm delivery date is a difficult position to be in.
• Build in a retesting window. If a result comes back close to a threshold, having time to retest a second sample from the lot can save a batch.