The 2018 Farm Bill (Agriculture Improvement Act of 2018) legalized hemp cultivation nationwide and introduced federal standards that every grower and processor must meet. At the heart of these standards is USDA pre-harvest hemp compliance testing, which dictates sampling procedures, total THC calculations, and laboratory qualifications for official analyses.
Congress is now working to renew the Farm Bill, and lawmakers may update hemp definitions, product limits, and testing requirements by the end of 2026. These potential changes could reshape how compliance works across the industry.
ACS Laboratory operates in accordance with USDA and state testing requirements. It offers nationwide hemp testing to help growers meet USDA requirements and safeguard their crops.
The Current Regulatory Landscape
Following the Farm Bill's 2018 passage, the USDA established a national hemp program that serves as the blueprint for all state and tribal programs. The agency released its final regulations in January 2021, which are set to expire on September 30, 2026. These regulations outline:
Current USDA regulations classify legal hemp as material with less than 0.3% total Delta-9 THC on a dry-weight basis. Total THC is determined using the formula:
Total THC = (%THCA × 0.877) + %Δ9-THC
Current hemp testing timeline and process standards include:
Sampling must take place within 30 days before the anticipated harvest, per the USDA's final hemp rule.
Samples must undergo testing using validated chromatography methods (HPLC or GC), with measurement uncertainty reported with the results.
Only official compliance samples gathered under a state or tribal plan are acceptable.
When results exceed 0.3% total THC, growers may occasionally remediate plant material per the state's program. When remediation is unsuccessful or prohibited, the crop must be destroyed under regulatory oversight.
The Role of Accredited Laboratories
USDA regulations mandate that hemp compliance tests be conducted by laboratories that satisfy rigorous scientific criteria, including:
ACS Laboratory satisfies these criteria as an ISO/IEC 17025:2017 Accredited by A2LA #6786.01 and DEA Registered (#RA0571996) testing facility. It is authorized to conduct USDA hemp compliance testing nationwide.
What the 2026 Farm Bill Could Change for Hemp Compliance
The 2026 Farm Bill (The Farm, Food, and National Security Act of 2026) aims to tighten current regulations by aligning its language with a major redefinition of "hemp" signed into law in November 2025.
The House Agriculture Committee advanced its proposal for the 2026 Farm Bill early this year. A full floor vote is targeted before the Bill extension expires on September 30, 2026.
Key Proposed Changes to Farm Bill
Total THC Standard: The previous standard, which only limited delta-9 THC to 0.3%, will be replaced by a total THC standard. This includes delta-9, THCA, delta-8, and other isomers. High-THCA flower, which was a major market segment under the old "loophole," will effectively become illegal federally.
Support for "Industrial Hemp": To protect the fiber and grain industries, the bill allows growers to self-designate as "only industrial hemp" producers. These farmers can benefit from reduced sampling and testing requirements and the removal of the 10-year ineligibility period for individuals with prior felony drug convictions.
Timeline and Implementation
The updated definition of hemp already exists in federal law, but it does not take effect until November 12, 2026. This delayed implementation gives growers, processors, and laboratories time to adjust operations and advocate for changes.
Lawmakers have introduced the Hemp Planting Predictability Act, which proposes a two-year delay to these requirements. Congress has not attached this delay to the Farm Bill, so the November 12, 2026, timeline remains in place unless additional legislation passes.
If Congress enacts changes before that date, lawmakers may revise or replace portions of the current proposal as part of the final Farm Bill package.
Beyond THC: Comprehensive Hemp Safety Testing
While the USDA manages total THC compliance, states govern consumer safety testing for hemp extracts and finished products. Most states mandate full-panel safety testing for ingestible, inhalable, and topical products.
Microbial contaminants (E. coli, Salmonella, etc.)
Heavy metals (lead, arsenic, cadmium, mercury)
Mycotoxins
Residual solvents
Vitamin E acetate screening for vape products
These standards differ substantially across states, and compliance failures can delay production, trigger recalls, or prevent brands from accessing certain markets.
Research and Development: Optimizing Quality
Research and development (R&D) testing plays a critical role in achieving compliance by helping operators improve quality, identify issues early, and refine processes before regulatory submission. R&D testing uses the same validated methods as compliance testing but supports internal decision-making rather than official reporting.
R&D hemp tests include:
Plant health panels for pathogens such as Hops Latent Viroid and Lettuce Chlorosis Virus
These tests allow growers and manufacturers to improve consistency, reduce variability, and catch potential failures before submitting samples for compliance testing.
Building a Compliance Strategy
Successful hemp operations incorporate compliance into every phase of their workflow. A strong compliance strategy encompasses:
Planning USDA sampling well in advance of harvest
Conducting R&D tests during cultivation or production
Verifying raw materials before processing
Testing in-process oils or concentrates
Confirming the safety and potency of the final products
This organized approach prevents expensive compliance failures and protects brand integrity.
The Path Forward
Hemp compliance testing extends beyond a regulatory requirement—it forms the foundation of a credible, safe, and scalable industry. As regulations evolve in 2026 and consumer expectations rise, businesses that prioritize testing with DEA-registered labs gain an advantage in quality, trust, and long-term growth.
Visit www.acslab.com for a complete list of hemp compliance testing services nationwide.
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