How to Read a Full-Panel Hemp COA: Beyond THC to the Complete Picture

A Certificate of Analysis is the foundational compliance document in the hemp supply chain — but most people in the hemp industry read only part of it. The cannabinoid panel gets most of the attention. The rest of the COA — the heavy metals panel, pesticide screen, residual solvents, microbial testing, and the lab identification and accreditation information at the top — is often skimmed or ignored.

In 2026, that approach is no longer adequate. Retail buyers and distributors doing compliance review, state regulators auditing hemp programs, and insurers evaluating coverage are looking at the full COA — and a COA that’s incomplete in any section raises questions about what else might be missing. This guide walks through each section of a full-panel hemp COA and explains what it tells you and what to look for.

Section 1: Lab Identification and Accreditation

The first thing to verify on any COA is not the results — it’s who performed the testing.

Lab name and contact information. The testing lab should be identified by name, with a physical address and contact information. Anonymous or vaguely identified labs are a red flag.

ISO 17025 accreditation statement. The COA should clearly state that the lab holds ISO 17025 accreditation for hemp cannabinoid testing. Some COAs include the accreditation number, which allows independent verification through the A2LA or Perry Johnson Laboratory Accreditation databases. If the accreditation claim isn’t verifiable independently, treat it as unverified.

DEA registration status (December 31, 2026 forward). As covered in our recent news coverage, USDA is requiring DEA registration for hemp testing labs starting December 31, 2026. Forward-looking supplier evaluation should ask whether the testing lab holds or is obtaining DEA registration.

Test date and report date. The COA should clearly show when the sample was tested and when the report was generated. COAs older than 12 months for stored ingredients or older than 6 months for finished products should be treated as potentially stale.

Sample identification. The COA must include a lot or batch number that links it to a specific production run. A COA without a lot number can’t be traced to specific inventory and doesn’t demonstrate that the specific product was tested.

Section 2: Cannabinoid Panel

The cannabinoid panel is the most scrutinized section of the COA — and the most frequently misread.

What a complete panel includes: A full cannabinoid panel tests for delta-9 THC, THCA, delta-8 THC, CBD, CBDA, CBG, CBGA, CBN, CBC, CBDV, THCV, and ideally any synthetic cannabinoid analogues (THC-O, HHC, delta-10) that are prohibited under the 2026 standard.

Total THC reporting: The panel should explicitly calculate and report total THC using the federal formula: delta-9 THC + (THCA × 0.877). A COA that reports only delta-9 THC without the total THC calculation is not providing 2026-compliant documentation. Some COAs report this automatically; others require you to calculate it yourself from the delta-9 and THCA values.

Reading the limits: Each result on the cannabinoid panel will show the measured value alongside the method detection limit (MDL) or limit of quantitation (LOQ). When a result shows “ND” (not detected) or “<LOQ,” it means the substance was not present at a measurable level — not that it is literally zero. The specific LOQ matters: a lab with a high LOQ can miss low-level contamination that a more sensitive lab would detect.

Uncertainty ranges: Quality lab reports include measurement uncertainty ranges (e.g., ±5%). A delta-9 THC result of 0.25 mg/g with a ±5% uncertainty range means the actual value could be as high as 0.2625 mg/g. For compliance calculations near limits, uncertainty ranges matter.

Section 3: Heavy Metals Panel

Hemp is a bio-accumulator — the plant readily absorbs heavy metals from soil. Hemp biomass grown in contaminated soil can contain significant levels of lead, arsenic, cadmium, and mercury that concentrate in hemp extracts.

What a complete heavy metals panel tests: Lead (Pb), arsenic (As), cadmium (Cd), and mercury (Hg) at minimum. Some panels also include chromium (Cr) and nickel (Ni).

Reference limits: The relevant limits for hemp consumer products are typically drawn from California Prop 65, USP dietary supplement limits, or state-specific limits. For ingestible products, lead limits are typically in the range of 0.5-2 µg/day; for topicals, limits are higher. Know which standard your retail buyers or insurers are applying.

When heavy metals testing is most critical: Finished product testing for heavy metals is most critical for ingestible formats (tinctures, capsules, edibles) where repeat daily exposure is expected. Topicals have higher acceptable limits. Raw biomass heavy metals results are a starting point; extraction and concentration processes can increase heavy metal concentrations in extracts relative to raw plant material.

Section 4: Pesticide Panel

What a complete pesticide panel covers: A full pesticide panel for hemp typically tests for 50-100+ pesticides including organophosphates, pyrethroids, neonicotinoids, fungicides, and herbicides. Panels that test for fewer than 50 pesticides are not providing comprehensive coverage.

The pass/fail framework: Pesticide results are typically compared against California’s cannabis pesticide action levels (which are among the most stringent in the U.S. and commonly used as an industry reference for hemp), FDA food pesticide tolerances, or specific state hemp pesticide limits.

Organic certification correlation: Hemp ingredients from organically certified operations carry a reduced pesticide risk profile, but organic certification doesn’t eliminate the need for pesticide testing — cross-contamination from adjacent non-organic fields and permitted organic pesticides still require COA verification.

Section 5: Residual Solvents Panel

When it applies: Residual solvent testing is required for extracts produced using solvent-based extraction methods — ethanol extraction, hydrocarbon extraction (butane, propane), and CO₂ extraction where solvent residues are possible. It is not typically required for hemp seed oil or other mechanical extracts.

Common solvents tested: Ethanol, isopropanol, heptane, butane, propane, hexane, and other Class 1, 2, and 3 solvents under ICH Q3C guidelines.

Interpretation: Residual solvent results should be below the applicable limits for the product format. Elevated residual solvents in an ingestible extract can indicate inadequate purging during processing.

Section 6: Microbial Testing

When it applies: Microbial testing is standard for ingestible hemp products and required by many retailers and state regulators. It is less commonly required for topicals.

What is tested: Total aerobic plate count (TAPC), total yeast and mold count (TYMC), coliforms, E. coli, Salmonella, and in some markets, Aspergillus species.

Interpretation: Results should be below the limits set by USP or applicable state food/supplement standards. Failures on microbial testing can indicate contaminated raw materials, inadequate processing conditions, or post-processing contamination.

LGH Perspective

Every COA we provide covers the full panel: cannabinoids (with total THC calculated), heavy metals, pesticides, and residual solvents. When our customers receive our ingredient COAs, they’re getting documentation that answers every section of a compliance review — not just the cannabinoid panel. If you’ve been qualifying hemp ingredient suppliers based only on their cannabinoid results, you’re missing more than half the COA.

Final Thoughts

A hemp COA is only as useful as the sections you read and understand. Total THC compliance is the most time-sensitive question in 2026 — but a COA that passes total THC and fails heavy metals is not a compliant product. Every section matters, and every section tells you something specific about the quality and safety of the ingredient or product being tested.

Read the full COA. Verify the lab. Understand what each section means.

Questions about what a full-panel COA from Low Gravity Hemp covers? Contact our team to discuss our testing panels and how they support your compliance documentation requirements.