Cannabis Compliance in California

Last verified: March 2026

Metrc: Seed-to-Sale Tracking

California uses Metrc (Marijuana Enforcement Tracking Reporting Compliance) as its statewide track-and-trace system. Metrc is the backbone of California's regulated supply chain, tracking every cannabis plant and product from cultivation through processing, testing, distribution, and retail sale.

• RFID-enabled tags: Every plant, package, and product receives a unique RFID (radio-frequency identification) tag that enables real-time tracking throughout the supply chain. Tags are scanned at each transfer point, creating an unbroken chain of custody
• Unique identifiers: Each product carries a Metrc UID — an alphanumeric code or barcode that traces its complete journey from seed or clone to the retail shelf. Consumers can verify a product's legitimacy by checking for this identifier on the label
• 53,000+ industry users: Over 53,000 licensed individuals interact with the Metrc system across California's cannabis supply chain, making it the largest cannabis tracking deployment in the world

For operators, Metrc compliance is non-negotiable. Every harvest, transfer, sale, destruction, and adjustment must be recorded in the system. Failure to maintain accurate Metrc records is one of the most common grounds for DCC disciplinary action.

DCC Enforcement Activity

The Department of Cannabis Control has significantly ramped up enforcement. In 2024, the DCC took 366 disciplinary actions against licensed operators:

Common violations include Metrc reporting failures, operating without proper local authorization, failure to maintain adequate security systems, unauthorized product transfers, and selling untested or improperly labeled products.

Product Recalls & Testing Failures

In Q2 2025 alone, the DCC issued 34 product recalls covering 444 individual products. Recalls were triggered primarily by pesticide contamination discovered post-sale, labeling inaccuracies, and potency misstatements. The recall volume underscores both the rigor of California's testing regime and the ongoing challenges in a market with thousands of active products.

Testing Requirements

Every legal cannabis product in California must pass comprehensive third-party laboratory testing before reaching consumers. The DCC mandates testing across six categories:

• Potency: THC, CBD, and other cannabinoid levels must be accurately quantified and match label claims
• Pesticides: Testing screens for 66 banned pesticide residues. Some pesticides are carcinogenic when combusted, making this test critical for smoked and vaporized products
• Heavy metals: Lead, arsenic, cadmium, and mercury levels must fall below established thresholds. Cannabis is a bioaccumulator that readily absorbs heavy metals from contaminated soil
• Microbials: Screening for E. coli, Salmonella, and Aspergillus. Particularly critical for immunocompromised medical patients
• Residual solvents: Products manufactured using volatile solvents (butane, propane, ethanol) must meet solvent residue limits
• Mycotoxins: Aflatoxins and ochratoxin A — mold-produced toxins that are carcinogenic with chronic exposure

California's 19 licensed testing laboratories must maintain ISO 17025 accreditation and are prohibited from having financial relationships with cultivators or manufacturers whose products they test — a structural firewall designed to prevent conflicts of interest.

Packaging & Labeling Requirements

Every California cannabis product must display:

• Universal THC symbol: A black exclamation point inside a triangle with the letters "THC," at least 0.5 inches in height on the primary display panel
• Potency information: Total THC/CBD per package and per serving, expressed in milligrams. Flower and concentrates must also show percentage of dry weight
• Metrc UID: The unique tracking identifier linking the product to its supply chain history
• Batch number and test date: The production batch identifier and the date of laboratory testing
• Lab name and license number: The identity of the testing laboratory
• Child-resistant packaging: All products must be in packaging that meets child-resistant standards

Packaging that mimics mainstream food brands, appeals to children, or makes unsubstantiated health claims is prohibited.

DCC Cultivation Regulatory Package (March 2025)

In March 2025, the DCC filed a comprehensive cultivation regulatory package that updates and streamlines compliance requirements for cultivators. The package simplifies administrative processes for license type changes (e.g., transitioning from outdoor to mixed-light), updates environmental reporting requirements, and reduces paperwork burden for routine operational adjustments. The rulemaking process is ongoing, with public comment periods and expected implementation in phases through 2026.