How to Read a COA (Lab Report)
Understand every section of a Certificate of Analysis for THCA flower and hemp products. Know exactly what you're buying.
Cannabinoid Potency
Shows the percentage of each cannabinoid present: THCA, Delta-9 THC, CBD, CBG, CBN, etc.
Why It Matters
This tells you how strong the product is. For THCA flower, look at the THCA % (typically 15-30%) and the Delta-9 THC % (must be under 0.3% for Farm Bill compliance).
What to Look For
Total THC is calculated as (THCA Ă— 0.877) + Delta-9 THC. Use our THCA to THC calculator to see what your flower actually delivers when smoked.
Higher THCA % doesn't always mean a better experience. Terpene profile often matters more for flavor and effect quality.
Terpene Profile
Lists individual terpenes and their concentrations (usually in % or mg/g): myrcene, limonene, caryophyllene, linalool, pinene, etc.
Why It Matters
Terpenes determine the flavor, aroma, and effects of your flower. Myrcene is sedating, limonene is uplifting, caryophyllene is anti-inflammatory.
What to Look For
Total terpene content above 1-2% is good. Above 3% is excellent. Each strain will have a unique terpene fingerprint.
Not all COAs include terpene testing. If a brand doesn't test for terpenes, they're likely not prioritizing the quality of the smoking experience.
Moisture Content
Shows the moisture level of the flower as a percentage of total weight.
Why It Matters
Ideal moisture for hemp flower is 8-12%. Too dry (<8%) means harsh smoke, lost terps, and crumbly buds. Too wet (>12%) risks mold and poor burn.
What to Look For
Look for moisture in the 9-11% range. This indicates properly cured flower that's been stored correctly.
If the COA doesn't list moisture content, the product may not have been tested thoroughly. Properly cured flower should feel slightly sticky, not bone-dry.
Microbial Testing
Tests for harmful bacteria, mold, yeast, and pathogens including E. coli, Salmonella, Aspergillus, and total yeast/mold counts.
Why It Matters
Contaminated flower can cause serious health issues, especially for immunocompromised users. Microbial testing ensures the product is safe to inhale.
What to Look For
Results should show 'Pass' or 'ND' (not detected) for all pathogens. Any 'Fail' is a dealbreaker.
Microbial contamination is invisible. You can't smell or see most mold spores. This is why lab testing matters — don't trust brands that skip this panel.
Heavy Metals
Tests for arsenic, cadmium, lead, and mercury concentrations in the product.
Why It Matters
Hemp is a bioaccumulator — it absorbs heavy metals from contaminated soil. Inhaling heavy metals is extremely dangerous to long-term health.
What to Look For
All results should be below state action limits or show 'ND'. Even trace amounts should be very low (measured in ppb — parts per billion).
This test is especially important for concentrates, where any contaminants present in the flower become concentrated during extraction.
Pesticide Residue
Screens for hundreds of common pesticides, fungicides, and growth regulators.
Why It Matters
Pesticides applied during growing can remain on the flower and are released when smoked. Many common pesticides produce toxic fumes when combusted.
What to Look For
'Pass' or 'ND' for all tested compounds. Any detected pesticide — even at low levels — is a red flag.
Organic and clean-grown hemp should have zero pesticide residues. If a brand claims 'organic' but doesn't show pesticide testing, be skeptical.
Why COAs Matter When Buying THCA Online
The hemp market is largely self-regulated. Unlike dispensary cannabis, online hemp products don't go through state-mandated testing in most cases. The only way to verify what you're getting is through a COA from an accredited third-party lab.
A proper COA tells you: exactly how much THCA and THC is in the product, whether it's free of pesticides and heavy metals, whether the moisture and microbial levels are safe for inhalation, and whether the product actually complies with the Farm Bill.
At BakeBoxx, every batch of flower, concentrates, and edibles is tested before listing. You can view COAs directly on each product page or on our COA lookup page.
Red Flags on a COA
- No lab name or accreditation — Legitimate COAs always list the testing facility and their ISO/state accreditation number
- Missing panels — If the COA only shows potency but not pesticides, metals, or microbials, the product hasn't been fully tested
- Old dates — COAs should be recent (within the last 6–12 months). Using old test results for new batches is misleading
- Delta-9 THC above 0.3% — The product doesn't comply with the Farm Bill and may be illegal to ship
- Any “Fail” result — A failed test for any contaminant means the product should not be consumed
How BakeBoxx Tests Products
- Third-party lab testing — We use accredited labs that we don't own or control
- Full panel on every batch — Potency, terpenes, pesticides, heavy metals, microbials, moisture
- Batch-specific results — Each batch has its own COA, not a generic lab report reused across products
- Publicly accessible — View any product's lab results on our COA page