What does COA mean for cannabis?

COA stands for Certificate of Analysis. It is the lab report for a specific batch of cannabis or a cannabis product. It lists the cannabinoids the lab measured, often terpenes, and the results of safety screens such as microbes, mycotoxins, heavy metals, pesticides and residual solvents, along with the lab's name, the batch identifier and the test dates.

How do I find the COA for a product I bought in DC?

Start with the package. Some DC products carry a QR code that links to the batch's lab results; Metrc, the District's tracking system vendor, offers an optional Retail ID QR code that opens COA and testing information when scanned. If there is no code, ask the dispensary. Labs upload results for every batch to the District's tracking system, and staff can help you find the report that matches your package's batch number.

What is the difference between THC and Total THC on a label?

THC usually means delta-9 THC as measured. Total THC estimates the maximum delta-9 THC if all the THCA converted, using the formula Total THC = delta-9 THC + (THCA x 0.877). On raw flower, Total THC is the more useful comparison number.

What safety tests does DC require on cannabis?

Under 22-C DCMR 6502.3, licensed labs must test a representative sample of each batch for moisture content, water activity, the cannabinoid panel (THCA, THC, CBDA, CBD and CBN), foreign matter, microbial contamination, mycotoxins, heavy metals including arsenic, cadmium, lead and mercury, pesticide and fertilizer residue, residual solvents, and a cannabinoid and terpene profile, plus extra tests for edible products.

Why does my menu number differ slightly from the label?

Menus often round numbers or show a single THC figure, while the label and COA break results into THCA, delta-9 THC and Total THC for that specific batch. Different batches of the same strain can also test differently. When the two disagree, the label and COA for your package are the reference.

How to Read a Cannabis Label and COA: A Line-by-Line Guide for DC Patients

Learn how to read a cannabis label and Certificate of Analysis (COA) in DC: Total THC, THCA, terpenes, batch numbers, contaminant tests and QR codes.