WeedCentral

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.

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

California
DCC · 4 CCR Div. 42

A licensed distributor drives the chain: it packages the batch, arranges lab sampling, and clears the pass. COA QR optional; universal "!THC" triangle.

Interactive
Colorado
MED · 1 CCR 212-3

No distributor tier: the cultivator self-samples and sends to the lab. Untested "R&D" product carries a blunt "produced without regulatory oversight" warning.

Interactive
Washington
LCB · WAC 314-55

The 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.

Interactive
New York
OCM · 9 NYCRR 128

An 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+".

Interactive
Michigan
CRA · R 420.301–510

The lab comes on-site to sample. The symbol is a green inverted triangle reading "MARIJUANA PRODUCT" (no "!"), and potency carries a "±10%" allowance note.

Interactive
Illinois
IDFPR + Ag · 8 IAC 1300

A split regulator (IDFPR licenses stores, the Dept. of Agriculture licenses growers). There is no required cannabis symbol, the long text warning does the work.

Interactive
Massachusetts
CCC · 935 CMR 500

The 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.

Interactive
Florida
DOH · Office of Medical Marijuana Use

Medical 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.

Interactive
Texas
DPS · Compassionate Use + DSHS hemp

Two 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.

Interactive
Ohio
DCC · ORC 3796 + OAC 1301:18

One 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.

Interactive
New Jersey
CRC · N.J.A.C. 17:30

The 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.

Interactive
Pennsylvania
DOH · 28 Pa. Code 1171a

The 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.

Interactive

Around the world

Canada
Health Canada + CRA

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.

Interactive
Brazil
ANVISA

Legal 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.

Interactive
Germany
BfArM

Legal 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.

Interactive
United Kingdom
MHRA + Food Standards Agency

Two regulators: specialist-only medical prescriptions dispensed by pharmacies, and everyday CBD vetted as a food on the FSA public list, capped near-zero THC.

Interactive
France
ANSM

Strict 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.

Interactive
Turkey
TITCK

A 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.

Interactive
Australia
TGA

No 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.

Interactive
Thailand
Dept. of Thai Traditional & Alternative Medicine

A 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.

Interactive
Japan
Narcotics Control Dept.

The 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.

Interactive
Netherlands
NVWA + Inspectie JenV (closed-chain experiment)

Three 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.

Interactive
Switzerland
FOPH + cantons (Art. 8a pilot trials)

Eight 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.

Interactive
Uruguay
IRCCA · Law 19.172 (2013)

The 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.

Interactive

Sample 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.

Educational information only, not medical advice. Terpene and cannabinoid effects are an active area of research and vary by person, product, and dose. Cannabis is for adults 21+ where legal.

Track what works for you

Log every session, learn the science, and discover cannabis-friendly places. Free on iOS.

Download on the App Store

Searching on Google? Add WeedCentral as a preferred source.