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Cannabis Testing, Labs and Product Safety
What Connecticut's certificates of analysis show, how the state's own reference laboratory at CAES works, which testing requirements the legislature has removed, and what patients can find out about the products they buy.
Every legal cannabis product in Connecticut is supposed to pass laboratory testing before sale. This investigation follows the paper: the certificates of analysis, the lab-to-lab discrepancies, the mold and yeast results, the state’s own testing program at the Connecticut Agricultural Experiment Station, and the legislative changes that have narrowed what must be tested. It also tracks the petition asking DCP to make test results public.
One story in this investigation carries a correction, listed on the timeline and on the corrections page.
Main story
Connecticut’s Cannabis Producers Can’t Pass Testing. So the State Is Removing It
Connecticut lawmakers are advancing a cannabis amendment that quietly does something extraordinary.
Recent developments
- DCP Faces October 26 Deadline on Testing Transparency and Patient Oversight PetitionOctober 8, 2026 · Patients & Testing
- Correction and Update: The State Cannabis Reference Lab Is Not NewSeptember 27, 2026 · Patients & Testing
- Connecticut Has Quietly Tested Hundreds of Cannabis Products. Now It Is Expanding Its Reference LabSeptember 23, 2026 · Patients & Testing
Timeline
- October 8, 2026StoryDCP Faces October 26 Deadline on Testing Transparency and Patient Oversight Petition
- October 8, 2026DCP faces an October 26 deadline on the testing-transparency and patient-oversight petition.
- September 27, 2026StoryCorrection and Update: The State Cannabis Reference Lab Is Not New
- September 27, 2026CorrectionCorrection to "Connecticut Has Quietly Tested Hundreds of Cannabis Products. Now It Is Expanding Its Reference Lab": This article described the state's cannabis reference laboratory at the Connecticut Agricultural Experiment Station as new. It is not. CAES has tested cannabis for the Department of Consumer Protection since a program that began July 1, 2022, and home growers could already obtain testing. What is new is the expansion into microbiological reference testing at the Griswold Research Center. A correction and updated report was published September 27, 2026.
- September 27, 2026Correction and update: the CAES program dates to July 2022 and home growers could already access testing.
- September 24, 2026StoryConnecticut Has Quietly Tested Hundreds of Cannabis Products. Now It Is Expanding Its Reference Lab
- September 23, 2026CannaTimes reports on CAES enforcement testing and the expansion of the state reference lab.
- September 17, 2026StoryNew COA Access Tool for Connecticut Cannabis Test Results Now in Beta
- June 3, 2026StoryProduct Passed One Lab's Microbial Test and Failed Another by a Wide Margin
- June 3, 2026StoryBrix Cannabis 'Soap' Product Record Raises Questions
- June 1, 2026StoryConsumer Alert: Mold Sensitivities, Asthma and Immunocompromised Patients
- April 22, 2026StoryO'Dea on Greenhouse Mold, Pesticides and Why the Legacy Market Hasn't Gone Anywhere
- April 21, 2026StoryHB 5350 Passes the House With Two Amendments, Heads to the Senate
- April 16, 2026StoryConnecticut’s Cannabis Producers Can’t Pass Testing. So the State Is Removing It
- September 19, 2025StoryPatient Alert: Mold Levels Found in Connecticut Cannabis
All stories in this investigation (11)
DCP Faces October 26 Deadline on Testing Transparency and Patient Oversight Petition
A formal petition submitted to Connecticut’s Department of Consumer Protection (DCP) is calling for greater transparency in cannabis safety testing, expanded access to laboratory results, and stronger independent oversight of medical cannabis products.
Correction and Update: The State Cannabis Reference Lab Is Not New
Editor’s Note / Correction: Connecticut CannaTimes published an article on September 23 detailing Connecticut’s little-publicized state cannabis testing program at the Connecticut Agricultural Experiment Station, or CAES, and the state’s expansion into microbiological reference testing.
Connecticut Has Quietly Tested Hundreds of Cannabis Products. Now It Is Expanding Its Reference Lab
State records show Connecticut has operated a government cannabis testing program for years, tested more than 265 samples submitted by regulators, and planned its laboratory as an oversight operation for private cannabis labs. Now the state is adding microbiological testing for mold, Aspergillus and other pathogens using qPCR.
New COA Access Tool for Connecticut Cannabis Test Results Now in Beta
An affiliate of Connecticut CannaTimes has launched CannaScope Lite, a new beta tool designed to make Connecticut cannabis laboratory results easier for consumers to search and compare.
Product Passed One Lab's Microbial Test and Failed Another by a Wide Margin
CT CannaTimes is seeking information from patients and consumers who may have purchased or consumed the cannabis flower product identified as 5EPU33-SC (Permanent Urkel). A review of laboratory records provided to CT CannaTimes shows what appears to be a significant discrepancy between two Certificates of Analysis (COAs) associated with the same product identifier.
Brix Cannabis 'Soap' Product Record Raises Questions
CT CannaTimes is seeking information from Connecticut cannabis patients and consumers regarding a Brix Cannabis flower product identified during a review of Connecticut cannabis testing records.
Consumer Alert: Mold Sensitivities, Asthma and Immunocompromised Patients
For consumers with mold sensitivities, asthma, severe allergies, immunocompromising conditions, or other respiratory concerns.
O'Dea on Greenhouse Mold, Pesticides and Why the Legacy Market Hasn't Gone Anywhere
O’Dea is pointing directly at cultivation concerns in the regulated market and acknowledging a reality policymakers rarely say out loud: the legacy market hasn’t gone anywhere, for a reason.
HB 5350 Passes the House With Two Amendments, Heads to the Senate
HARTFORD — In a stunning contradiction, Connecticut lawmakers have passed House Bill 5350 after floor debate repeatedly emphasizing that legal cannabis is “safe because it is tested” while the bill itself strips those testing standards out of state statute.
Patient Alert: Mold Levels Found in Connecticut Cannabis
Connecticut cannabis patients need to be aware: recent laboratory results show that some products currently passing state testing would fail in most other states due to excessive yeast & mold contamination. For patients with compromised immune systems, asthma, or mold sensitivities, these results should be treated as a red flag.