Massachusetts Cannabis Control Commission
2025 Cannabis Testing Results
50,423 unique samples • 357,469 individual test records • January – November 2025 • 13 licensed laboratories
Monthly Failure Rate Trend
Failure Rate by Laboratory
Monthly Avg THCA (%) & Failure Rate (%)
THCA Potency Distribution (%)
Mean THCA (%) by Laboratory
Monthly Sample Volume by Laboratory
Pass Rate vs Test Volume by Lab
Top 5 Labs — Monthly Failure %
Lab Sample Volume Heatmap — Monthly
Individual Lab Profiles
THCA potency positioning, pass rates, and distribution shapes — Overall mean: 25.22% THCA
Where Each Lab Falls on the THCA Distribution
Microbial Analysis — Yeast & Mold
Total Yeast and Mold (CFU/g) trends across passing and failing batches
28.9%
Detection Rate (Pass)
93.5%
Detection Rate (Fail)
993
Median CFU/g (Pass, nonzero)
71,220
Median CFU/g (Fail, nonzero)
YM Count Distribution — Pass vs Fail
Monthly YM Detection Rate (%)
YM Detection Rate by Lab — Passing vs Failing Batches
Note: Lab_O was excluded from all charts due to abnormal data (55 total samples, 90.9% failure rate) which skewed visualizations and is not representative of typical lab performance.