COA explainers
Who keeps cannabis safe? A map, country by country
A Certificate of Analysis (COA) is the lab report that proves a cannabis product was tested for potency and contaminants. Who tests it, and what has to end up on the package, changes from one place to the next. Tap a highlighted country, or the United States to pick a state, and play one batch through from farm to shelf.
has a walkthrough · tap a country, or the US to choose a state
Who adds what in California
Who adds what in Colorado
Who adds what in Washington
Who adds what in New York
Who adds what in Michigan
Who adds what in Illinois
Who adds what in Massachusetts
Who adds what in Florida
Who adds what in Texas
Who adds what in Ohio
Who adds what in New Jersey
Who adds what in Pennsylvania
Who adds what in Canada
Who adds what in Brazil
Who adds what in Germany
Who adds what in United Kingdom
Who adds what in France
Who adds what in Turkey
Who adds what in Australia
Who adds what in Thailand
Who adds what in Japan
Who adds what in the Netherlands
Who adds what in Switzerland
Who adds what in Uruguay
United States, pick a state
Cannabis is legal state by state in the US, and each writes its own testing and label rules. Twelve are mapped so far.
What's the same almost everywhere
An independent lab
The COA comes from an independent, accredited lab, never the grower's own say-so and never the store.
Proof lands at the lab step
The numbers you rely on (the potency, the pass) are added at the lab step; the shop or pharmacy only hands over what already passed.
Tracked by batch
Every legal package is tracked by batch and carries the required warnings for where it is sold.
Where they differ: who pulls the sample, whether there's a middleman, which warning or symbol is required, whether you buy it in a shop or a pharmacy, and whether there's a QR, stamp, or track-and-trace code you can check yourself. Each card below calls out that place's twist.
United States
A licensed distributor drives the chain: it packages the batch, arranges lab sampling, and clears the pass. COA QR optional; universal "!THC" triangle.
InteractiveNo distributor tier: the cultivator self-samples and sends to the lab. Untested "R&D" product carries a blunt "produced without regulatory oversight" warning.
InteractiveThe producer self-samples to an accredited lab. The only required mark is a red-hand "NOT FOR KIDS" symbol, no THC triangle; traceability runs on the state's CCRS, not Metrc.
InteractiveAn independent sampling firm pulls the sample on video. The COA QR is required on the label (opposite of California), alongside a yellow "THC!" triangle and "21+".
InteractiveThe lab comes on-site to sample. The symbol is a green inverted triangle reading "MARIJUANA PRODUCT" (no "!"), and potency carries a "±10%" allowance note.
InteractiveA split regulator (IDFPR licenses stores, the Dept. of Agriculture licenses growers). There is no required cannabis symbol, the long text warning does the work.
InteractiveThe licensee self-samples to a single independent lab. The package carries two marks, a red "CONTAINS THC" triangle and a "Not Safe for Kids" octagon; edibles cap at 5 mg per serving.
InteractiveMedical only, and vertically integrated: one company grows, makes, and sells. An arm's-length state-certified lab clears every batch and a state registry decides who can even buy. Gas-station delta-8 sits outside it all.
InteractiveTwo systems: a tiny low-THC medical program, plus a hemp market just reined in. As of mid-2026 delta-8 is banned; low-dose delta-9 stays legal 21+, its safety resting on a COA you can scan.
InteractiveOne statute since March 2026, but two rulebooks. The lab comes on-site to sample, potency is reported as received, and the label names the lab (a COA QR is optional). Over 0.4 mg THC outside a dispensary is illegal.
InteractiveThe lab pulls the sample and tests to Maryland's rulebook; the label carries a terpene profile and the red-octagon NOT SAFE FOR KIDS symbol, and the CRC's consumer guide says any dispensary must hand you the COA on request. Per-batch testing rules only took effect in December 2025.
InteractiveThe lab's own employee drives to the farm and cuts the sample, and a grower-pulled sample is not a valid test at all. Terpenes are mandatory, ten cannabinoids print on the label, and then the rule stops: the certificate of analysis goes only to the grower and the state. No QR code, no copy for the patient.
InteractiveAround the world
One federal rulebook coast to coast: every legal pack is licensed, batch lab-tested, and sealed with a CRA excise stamp you can check yourself, plus the red "THC" symbol.
InteractiveLegal cannabis is a pharmacy medicine: an ANVISA authorization number on the label, made under GMP, and batch-tested by a Brazil-accredited (REBLAS) lab before sale.
InteractiveLegal to hold, hard to buy. The strongest controls live in the pharmacy channel, where medical cannabis is batch-released to a pharmacopoeia standard; clubs test under lighter rules.
InteractiveTwo regulators: specialist-only medical prescriptions dispensed by pharmacies, and everyday CBD vetted as a food on the FSA public list, capped near-zero THC.
InteractiveStrict by default: recreational stays a crime, medical is a stalled pharmacy pilot, and shop CBD is legal only at or under 0.3% THC with no health claims.
InteractiveA low-THC (≤0.3%) pharmacy medicine, ISO 17025 lab-verified and tracked unit-by-unit with a QR code the state can audit end to end.
InteractiveNo legal rec market, but a huge medical one. Even "unapproved" products must pass the national TGO 93 standard before a pharmacy dispenses them on prescription.
InteractiveA 2025 U-turn made cannabis prescription-only again: a GACP-certified farm, a batch COA from the medical-sciences lab, and a licensed dispensary with a practitioner on-site.
InteractiveThe only legal "cannabis" is near-zero-THC CBD. The safety net sits at the border: a lab report must prove the THC is under a strict ppm limit before customs lets it in.
InteractiveThree systems at once: ten experiment cities sell only sealed, lab-tested, tracked packs from licensed growers, while Amsterdam's coffeeshops stay untested, and pharmacy cannabis runs on its own batch-release track.
InteractiveEight federally authorised pilot trials sell Swiss-grown, organic, lab-tested cannabis capped at 20% THC in sealed neutral packs to more than 10,000 registered participants (mid-2025). Everyone else buys untested.
InteractiveThe world's first national legal market. Private producers grow on state land run by the regulator, every commercial lot is lab-screened before release and capped at 20% THC, and 60 pharmacies sell sealed 5 g bags to 89,000 registered buyers by fingerprint. The 585 clubs and 10,000 home growers are not lab-tested.
InteractiveSample data for illustration only. Label symbols are approximations, real packaging must use each jurisdiction's official artwork and current regulations. Framework citations are provided as starting points, not legal advice. Cannabis rules change quickly; verify against the current law for your country or state before relying on any detail.
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