Data through December 2023
This site relies entirely on data published by the Cannabis Control Commission via their Open Data Catalog and is only current through the dates they make available.
Important: This historical data uses different anonymization than the 2025 dataset. We have no confirmation that lab names (e.g., "LabA") in this 2021-2023 data correspond to the same entities as similarly-named labs (e.g., "Lab_A") in the 2025 dashboard. The 2024 data was not included in the state's open data release. This dataset does not include an explicit pass/fail field or heavy metals testing: YM pass/fail is derived using the regulatory threshold of >10,000 CFU = fail. Heavy metals analyses are only available on the 2025 dashboard.
How THCA potency and testing volume evolved across 2021, 2022, and 2023
Distribution shapes and potency stats: Overall mean: 22.52% THCA
A 6.63% THCA gap between the highest and lowest reporting labs (2021-2023).
| Lab | Mean THCA | % Above Avg | % in Top Quartile | % in Bottom Quartile | Cohen's d | Above +1σ | Below -1σ |
|---|
| # | THCA % | Lab | Zone |
|---|
Regulatory threshold: >10,000 CFU = fail • 92,208 total YM tests • 8,186 failures (8.9%)
Percentage of samples exceeding 10,000 CFU threshold
Log-scale bins: samples with YM > 0 only • Red bars = above fail threshold
Breakdown by product type: Buds, Concentrates, Edibles, and more
Benford's Law compliance and statistical anomaly detection
Chi-squared distance from expected Benford distribution · Lower = more natural
Benford's Law predicts that in naturally occurring datasets spanning multiple orders of magnitude, the leading digit "1" appears ~30% of the time, "2" appears ~18%, and so on. Deviations can signal data anomalies.
Highest deviation:
• LabY: χ²=43.57: 7.8% of first digits are "2" (expected: 17.6%)
• LabO: χ²=36.10: 57.2% of first digits are "1" (expected: 30.1%)
Closest to natural:
• LabE: χ²=1.22: nearly perfect Benford fit
• LabB: χ²=3.13: excellent compliance
χ² critical value at p=0.05 with 8 degrees of freedom is 15.5. Labs above this threshold have statistically significant deviations from Benford's Law.
Showing labs with highest χ² scores against Benford's expected distribution (dashed line)