Who's Responsible for a Cannabis COA in Washington?

shWashington-specific and educational only, not legal advice. Rules change; operators should confirm current requirements with the LCB or counsel.

Washington was one of the first two states to legalize adult use, and it built its own rulebook, right down to a warning symbol that looks nothing like California's and a tracking system that isn't Metrc.

As in Colorado, there is no distributor here, and the producer or processor pulls its own sample. An independent, accredited lab still issues the result. Here is one lot's path from the grow to the shelf.

The short version:

The result comes from an independent lab that is WSDA-accredited and LCB-certified. A brand cannot certify its own product.

There is no distributor tier, and Washington bans vertical integration into retail.

The producer or processor takes the sample itself under protocol (a certified lab may retrieve it). There is no third-party sampler.

Every step is reported into Washington's own CCRS data system, not Metrc.

Here is how it actually works, following one batch from the field to the shelf.

▶ Try the interactive version (https://weed-central.com/learn/coa/usa-washington?utm_source=newsletter.weed-central.com&utm_medium=newsletter&utm_campaign=who-s-responsible-for-a-cannabis-coa-in-washington): follow one batch from farm to shelf and watch the label build up, color-coded by who adds each piece.

A quick note on the rulebook

Washington cannabis is regulated by the Liquor and Cannabis Board (LCB) under WAC 314-55. Lab accreditation is handled by the Department of Agriculture (WSDA). Traceability runs through the state's own Cannabis Central Reporting System (CCRS).

Meet the players

The producer grows and harvests the lot. Washington licenses carry a state UBI business number.

The processor turns it into the finished product (here, an edible) and applies the label.

The lab independently analyzes the sample and issues the result. It must be WSDA-accredited and LCB-certified.

The retailer sells only compliant, labeled product to adults 21+ (or to medical patients for DOH-compliant product). Retail may not be vertically integrated with production.

The state (LCB) watches the chain through CCRS.

The COA workflow, step by step

Producer / harvest lot (Producer). A licensed producer grows and harvests a lot. Washington has no distributor tier and bans vertical retail integration.

Processor makes the product (Processor). A processor turns it into the finished edible and will apply the label. This becomes the producer/processor UBI + lot number.

Producer/processor samples (Producer). The producer or processor takes the samples themselves per protocol (a certified lab may retrieve them). No third-party sampler.

Certified lab analysis (Lab). An independent WSDA-accredited + LCB-certified lab runs potency, water activity, microbials, mycotoxins, pesticides, solvents. Results report to the LCB.

Results / pass-fail (Lab). The lab issues results. This unlocks the label’s Total THC & CBD and, for edibles, THC per serving + per package.

Package + label (Processor). The processor adds the red-hand “NOT FOR KIDS” symbol (required on edibles), the potency, ingredients + allergens, and Washington’s warnings.

Wholesale → retailer (Retailer). Product transfers to a retailer with a manifest; every step is reported into Washington’s own CCRS system (not Metrc).

Retail sale (Retailer). The retailer verifies compliant, labeled product and sells to 21+ (or a medical patient for DOH-compliant product).

What a licensed lab tests for

A Washington lab runs a required quality-assurance panel:

Cannabinoid potency (Total THC and CBD; per-serving and per-package for edibles)

Water activity and moisture

Microbials and mycotoxins

Residual pesticides

Residual solvents (for concentrates)

Heavy metals

Results report to the LCB. A failing lot cannot be sold as-is; it is destroyed or, where allowed, remediated and re-tested.

What ends up on the package, and who puts it there

A Washington edible label carries the product identity, the net weight and piece count, the THC per serving and per package, the ingredients and allergens, the producer and processor, and the required warnings, in child-resistant packaging.

Here is Washington's surprise: there is no THC triangle at all. The one required graphic on edibles is a red-hand "NOT FOR KIDS" symbol, printed with the national Poison Control number. That is the mark shoppers should look for.

The warning, word for word

Washington's warnings are short and plain. On an edible you will see language like:

Warning - May be habit forming

Unlawful outside Washington State

It is illegal to operate a motor vehicle under the influence of cannabis

Caution: Intoxicating effects may be delayed by 2+ hours.

The QR question

Washington does not require a QR code linking to the COA on the package. The lot number ties the product back to its record in CCRS. Any COA QR you see was added voluntarily by the brand.

Common myths

"There's a THC symbol like other states." Not on Washington product; the required mark is the red-hand "NOT FOR KIDS" symbol.

"It's tracked in Metrc." No; Washington runs its own CCRS system.

"A distributor arranges the test." No; the producer or processor arranges it and samples the lot itself.

"The brand can test in-house." No; the lab must be WSDA-accredited and LCB-certified, and independent.

How to read a COA as a customer

Three quick checks:

Does it pass? Look for an overall pass, and scan for any fail on the contaminant sections.

Does it match the package? The COA's Total THC and CBD should line up with the label, and the batch numbers should match.

Is it current and real? The issuing lab should be an independent, accredited facility, and the tracking tag confirms it is a real, logged package.

The one-line takeaway

Washington has no distributor, the producer/processor arranges testing and even samples the lot itself, then an independent lab certifies it. Washington’s only required graphic is the red-hand “NOT FOR KIDS” symbol (there is no THC triangle), it runs its own CCRS data system instead of Metrc, and its warnings are short and plain.

Washington-specific and educational only, not legal advice. Sources: Washington Liquor and Cannabis Board (LCB), WAC 314-55; Washington State Department of Agriculture lab accreditation; CCRS.