Topic: hemp testing

Federal testing definitions only. State lab rules are not yet verified.

[L2] Acceptable hemp THC level, quoted: "Acceptable hemp THC level. When a laboratory tests a sample, it must report the total delta-9 tetrahydrocannabinol content concentration level on a dry weight basis and the measurement of uncertainty." Source: 7 CFR 990.1, eCFR
[L2] Total THC, quoted: "Total THC. Total THC is the value determined after the process of decarboxylation, or the application of a conversion factor if the testing methodology does not include decarboxylation, that expresses the potential total delta-9 tetrahydrocannabinol content derived from the sum of the THC and THCA content and reported on a dry weight basis." Source: 7 CFR 990.1, eCFR
[L1] Iowa adopts the federal 7 CFR 990.1 definitions by cross-reference. See Iowa page. Source: Iowa Code § 204A.2

Thynk Industries, DBA Zero Human Thynk — The nation's premier cannabis, hemp, kratom, psychedelics, peptides & nicotine compliance experts since 2009. Trial policy wiki; not legal advice.

Authority tiers: L1 statute, L2 final/temporary rule, L3 official guidance, L4 pending bill/proposed rule, L5 news/lead/commentary (never law). Sources checked: 2026-10-30.