USDA Dairy Product Grading and Approved Plant Program

USDA's Agricultural Marketing Service (AMS) operates a voluntary dairy product grading program under 7 CFR Part 58 — the framework that authorizes dairy plants to display USDA grade marks on butter, cheese, nonfat dry milk, and ice cream. To use a grade designation like "U.S. Grade AA Butter" or "U.S. Extra Grade Nonfat Dry Milk," a processor must first be approved as an AMS-graded plant, then maintain ongoing compliance through periodic USDA inspections. The program is voluntary, but major buyers — grocery chains, food service companies, and government purchasers — routinely specify USDA grades in their contracts, making plant approval a practical market entry requirement for processors targeting those customers.

Current Rule (2026)

What This Rule Does

If a dairy plant wants to put a USDA grade mark on its butter, cheese, nonfat dry milk, or ice cream, it must first earn approval as an "AMS-graded plant." That approval is not a one-time certification — it is an ongoing relationship in which USDA inspectors periodically assess the plant's facilities, sanitation practices, milk quality controls, and production methods. Products that earn a USDA grade designation (e.g., "U.S. Grade AA Butter" or "U.S. Extra Grade Nonfat Dry Milk") carry legally defined quality assurances backed by the Agricultural Marketing Act of 1946.

The AMS dairy grading program is entirely voluntary. No federal law requires a dairy processor to participate. But major buyers — grocery chains, food service companies, government contracts, and export customers — routinely specify USDA grades in their purchase contracts. For processors who want access to those markets, plant approval and grading certification are effectively market entry requirements.

The regulations in 7 CFR Part 58 have two main pieces. Subpart A sets the procedural rules for applying for inspection and grading, appealing a grade determination, handling certificates, and paying fees — the same framework used across all AMS commodity grading programs. Subpart B is where most of the operational content lives: detailed facility specifications, milk quality acceptance standards, sanitation requirements, pasteurization rules, and pest and pest control expectations that a plant must maintain to keep its approval. Additional subparts establish the actual grade standards for specific products — nonfat dry milk, dry whole milk, and ice cream.

Key Provisions

• § 58.11 — An application for grading service is approved only if a trained inspector is available, the plant's facilities are suitable, and the product to be graded is one AMS has standards for
• § 58.12 — AMS can reject an application if someone with a financial interest in the product is not legally allowed to apply, if the applicant has an unpaid balance, or if the product or facility fails to meet requirements
• § 58.122 — USDA will only grade dairy products made, processed, and packaged in plants that have earned approved status — no approval, no grade mark
• § 58.123 — Before approving a plant, AMS sends a representative to inspect the premises, equipment, raw material supplies, production capacity, and test facilities; the plant must pass before the program begins
• § 58.124 — AMS can deny or suspend a plant's approval when it finds unacceptable problems with milk classification, handling, equipment, or sanitation; notice and hearing procedures apply
• § 58.125–58.128 — Physical plant standards: grounds must be paved and free of odors; buildings pest-proof and in good repair; water supplies separated (potable vs. non-potable); all product-contact surfaces must be stainless steel or equivalent corrosion-resistant material and designed to be fully cleanable
• § 58.129–58.130 — Hygiene: workers must wash hands before production and after any contamination event; no spitting, no tobacco in production areas; no one with a contagious disease, open wound, or infected sore may work in rooms where milk or dairy products are handled
• § 58.132–58.137 — Milk acceptance: incoming milk must pass visual and odor inspection, drug residue testing, sediment rating, somatic cell count, and bacterial estimate; milk rated No. 4 for sediment or testing positive for drug residues must be rejected immediately; a producer whose milk repeatedly fails must be excluded from supply
• § 58.140 — When a producer's milk tests positive for drug residues or violates somatic cell limits, the plant must immediately send a representative to that farm to identify and correct the source
• § 58.144 — Any product labeled "pasteurized" must be processed at the required time-temperature combination in approved equipment that eliminates all pathogens; the pasteurization system must be validated and maintained
• § 58.147 — Plants must designate a specific employee responsible for the insect and rodent control program, even if a commercial pest control contractor is used
• § 58.155 — Grading against U.S. grade standards may be performed by a certified USDA grader at the plant; when lab tests are required to determine the final grade (e.g., fat content, moisture), those tests must be performed in an approved lab
• § 58.158 — The USDA shield mark (official identification) may only be applied to packaging for products that were received, processed, graded, and certified under these rules; authorization to use the shield requires a separate application

How It Affects You

If you operate a dairy processing plant: Plant approval is voluntary, but if your customers specify USDA grades — which most institutional buyers and government contracts do — you effectively need it. The approval process starts with a full plant survey by an AMS representative. Once approved, you stay in the program through ongoing compliance with the facility, sanitation, and milk quality standards. AMS can suspend approval if it finds significant violations; suspended plants cannot use USDA grade marks on new production. Appeals follow standard administrative hearing procedures.

If you source dairy ingredients for food manufacturing: A USDA grade certificate from an approved plant is the standard third-party verification of product quality for bulk butter, cheese, nonfat dry milk powder, and similar ingredients. The grade on the certificate is legally defined — "U.S. Extra Grade" nonfat dry milk, for instance, must meet specific moisture, fat, protein, and bacteriological limits. Specifying USDA grades in supply contracts shifts the verification burden to AMS rather than requiring you to maintain your own testing infrastructure.

If you supply raw milk to an approved dairy plant: Your milk will be tested on every delivery for drug residues (antibiotics and other veterinary drugs), somatic cell count (an indicator of mastitis), sediment, and bacterial levels. A single positive drug residue test results in immediate rejection of the load. Repeated quality failures — three sediment violations, three somatic cell count violations, or a drug residue positive — will result in exclusion from that plant's supply pool. The plant is required to notify you of the specific reason and send a representative to help identify the source of the problem.

If you are a government purchaser or school nutrition program buyer: USDA grades on dairy products are a key quality specification in federal food procurement. The USDA Foods program (formerly USDA commodity foods) and school lunch program purchases specify grades established under Part 58. When a supplier certifies a product to a USDA grade, the grade certificate is the contractual quality guarantee — if the product does not match the stated grade, the buyer has a defined remedy under the purchase contract.

Statutory Authority

This rule implements:

• 7 U.S.C. § 1622 — Authorizes USDA to develop and disseminate grade standards and inspection and certification services for agricultural commodities, including manufactured dairy products
• 7 U.S.C. § 1621 — Policy declaration establishing federal interest in facilitating orderly and efficient marketing of agricultural products

Recent Rulemakings

• 67 FR 48976 (2002) — Updated plant specifications affecting 9 sections; part of a broader AMS modernization of facility and sanitation requirements
• 58 FR 26913 (1993) — Earlier amendment package affecting 6 sections
• 40 FR 47911 (1975) — Major revision updating milk quality testing standards and equipment specifications

The core plant approval and product grading framework has been stable since the 1970s–1980s. Grade standards for individual dairy products are updated infrequently, typically when industry petitions AMS after changes in manufacturing technology or market expectations.

Recent Developments

• Bird flu (HPAI) and dairy industry disruption (2024–2025): The H5N1 highly pathogenic avian influenza outbreak spread to dairy cattle herds in 2024, with infections confirmed in dozens of states. USDA APHIS managed the outbreak response; dairy plant operations were affected as producers dealt with herd management requirements and milk testing mandates. AMS's Dairy Grading Branch adapted inspection protocols to address biosecurity concerns at plants receiving milk from potentially affected herds.
• Fluid milk consumption decline and plant capacity: Fluid milk consumption in the United States has declined steadily for decades. Several major dairy cooperative processing plants have closed as processing capacity is consolidated. Plant closures that affect USDA-approved plants require AMS notification under Part 58's plant approval framework. The consolidation of dairy processing has reduced the number of USDA-approved plants while remaining plants have increased throughput.
• Specialty dairy and craft cheese: Consumer demand for specialty cheeses, artisan dairy products, and premium butter has grown substantially. Many specialty dairy producers operate small plants that need AMS grading approval to market products with USDA grade designations. AMS has worked to make its approval and grading services accessible to smaller specialty producers, including on-site grading arrangements that accommodate lower production volumes than large commodity cheese facilities.
• Organic dairy grading: USDA organic certification (administered by AMS's National Organic Program) and dairy grading are separate programs, but many organic dairy producers pursue both — using the USDA organic seal and a quality grade designation to command premium prices. AMS graders work in both certified-organic and conventional dairy plants; the organic certification does not modify the grading standards, which apply equally to organic and conventional dairy products.

Pending Action

No major rulemaking of 7 CFR Part 58 is currently pending. AMS's Dairy Grading Branch processes plant approvals and grade designations on a rolling administrative basis. HPAI biosecurity protocols developed in response to the 2024–2025 dairy cattle outbreak may be incorporated into dairy plant approved-plant requirements through informal guidance or a future proposed rule — watch AMS's dairy program announcements for any new biosecurity requirements affecting plant operations. Farm Bill 2025 reauthorization does not directly affect Part 58, but broader dairy policy (milk pricing, support programs, organic dairy) affects the economics of AMS-approved dairy plant operations and the industry's investment in plant capacity.