Texas cannabis testing requirements

Required tests

• Potency
• Pesticides
• Residual solvents
• Heavy metals
• Microbials
• Other (see notes)

ISO/IEC 17025 accreditation

Not required. 37 TAC chapter 12 sets no lab accreditation standard for low-THC cannabis testing. For consumable hemp, DSHS rules (25 TAC chapter 300) require an ISO/IEC 17025-accredited lab.

Notes

• Rules: 37 TAC 12.7 (testing, production and packaging), unchanged since 15 March 2017. Statutes: Health and Safety Code chapter 487 and Occupations Code chapter 169.
• Named tests: THC and CBD levels, residual solvents, pesticides, fungicides, fertilizers (other), mold (microbials) and heavy metals, applied through the Agriculture Code, 4 TAC Part 1 and 16 CFR Part 1107; the rule sets no limits of its own.
• The rule does not say who must run the tests and sets no lab licensing, independence or accreditation standard. Licensees must keep records of all tests (37 TAC 12.4).
• HB 46 (in effect 1 September 2025) redefined low-THC cannabis as 10 mg THC or less per dosage unit, added qualifying conditions and raised the cap to 15 dispensing organization licenses. It does not address lab testing.
• Possession of cannabis outside the program remains an offense (Health and Safety Code 481.121).
• Hemp (DSHS, 25 TAC chapter 300, rules in effect 31 March 2026): consumable hemp products must be tested by an ISO/IEC 17025-accredited lab for cannabinoids including total THC, residual solvents, heavy metals, pesticides and pathogens, with total delta-9 THC at 0.3% or less.
• Hemp sales to people under 21 have been barred since DSHS emergency rules of 2 October 2025. A state schedule treating delta-8 THC as a controlled substance took effect 31 July 2026.
• Federal: from 12 November 2026, P.L. 119-37 sec. 781 limits hemp to 0.3% total THC and excludes final hemp-derived cannabinoid products over 0.4 mg total THC per container.
• Partial: the text of 37 TAC 12.7 was read from LII's copy because the official Texas SOS rule viewer needs a browser session; the DPS pages cite the same chapter.