USDA Agricultural Marketing Service (AMS)
USDA Rice Standards
The official USDA grading system for rough, brown, and milled rice sold in the United States.
View official standardAbout this standard
The United States Standards for Rice, maintained by the USDA Agricultural Marketing Service (7 CFR §§ 868.201-868.316), define the grading factors used to inspect and classify rough rice, brown rice for processing, and milled rice in US trade — including chalkiness, broken kernels, whiteness, and foreign material limits. Vibe imaging workflows measure the same morphology and color parameters these grades depend on, giving labs data based on USDA grade-factor definitions.