Preventing Commingling & Contamination in Organic Handling

Commingling is the unintentional mixing of certified organic products with non-certified products at any stage of the handling process — in storage, on the production line, in packaging equipment, or in transportation. Once commingling occurs, the organic status of the entire affected lot is compromised and affected products cannot be sold as certified organic.

Commingling risks in handling operations arise from:

• Shared storage: organic and non-organic ingredients stored in adjacent or unlabelled bins

• Shared equipment: production lines run both organic and conventional products without adequate cleaning between runs

• Scheduling errors: organic and non-organic product runs not adequately sequenced or separated

• Mislabelling: finished organic products not immediately and clearly identified as organic

• Transportation: organic and non-organic products commingled in shared transport vehicles

NOP § 205.272 requires certified handlers to implement a system that prevents commingling at all stages. The system must be documented in your OSP and demonstrated to your certifier's inspector during the annual inspection — commingling prevention controls are one of the first things inspectors look for in a handler operation.

Effective commingling prevention requires a layered system of physical, procedural, and documentation controls:

Physical Controls:

• Dedicated organic storage areas: clearly labelled, physically separated from non-organic ingredient storage

• Color coding or tagging systems: consistent use of specific colors (bins, totes, packaging materials, tags) to identify organic product flow

• Physical barriers where possible: separate refrigerators, silos, tanks, or bins for organic vs. non-organic

Scheduling Controls:

• Organic-first scheduling: where organic and conventional products run on shared equipment, schedule organic runs first — before any conventional product has been run on that equipment — or after a validated cleaning sequence

• Production scheduling logs: document which product ran on which line at what time, and what cleaning occurred between runs

Sanitation Controls:

• Written equipment cleaning and sanitation procedures for every shared piece of equipment

• Documentation of every cleaning event: date, time, who performed the cleaning, cleaning materials used

• Pre-run verification: confirm equipment is clean and free of non-organic residue before starting organic production

Labelling Controls:

• Immediately identify all organic product lots with organic lot tags or labels at the point of production

• Maintain lot traceability from ingredient receipt through finished product shipment

A split handling operation is one that processes or handles both certified organic and non-certified (conventional) products in the same facility — on the same or adjacent production lines, in shared storage areas, or using shared equipment.

Split handling operations are permitted under NOP regulations but carry heightened compliance risk and require more rigorous documentation:

Additional OSP requirements for split operations:

• Explicit description of how organic and non-organic production lines are separated or scheduled

• Documented cleaning and sanitation procedures for all shared equipment, validated to effectively remove non-organic residue

• Separate storage designations, clearly labelled and physically enforced

• Detailed production scheduling logs that document which lines ran what product and when

Inspection focus areas for split operations:

• Inspectors will pay particular attention to equipment cleaning records, storage labelling, and the audit trail between incoming organic ingredients and outgoing organic finished product

• Any gap in the documentation — a missing cleaning log, an unlabelled bin, an incomplete production record — creates a commingling risk finding

Best practice for split operations: treat the cleaning and separation system as your most important compliance asset. Keep it documented, keep it consistent, and keep it audit-ready year-round — not just before your inspection.

Preventing prohibited substance contact means ensuring that no substance prohibited under the NOP comes into contact with certified organic products at any point in the handling process — not on the production line, not in storage, not during packaging, and not during transportation.

The most common sources of prohibited substance contact risk in handling facilities:

1. Cleaning and sanitation chemicals: Many conventional food-grade sanitizers contain synthetic substances prohibited under the NOP. Your facility's approved cleaning and sanitation materials must be on your OSP and approved by your certifier. Unapproved sanitizers used on equipment that contacts organic product is one of the most common handling non-compliance findings.

2. Packaging materials: Conventional packaging materials may contain synthetic coatings, inks, or treatments that could contact the product. Confirm with your certifier that your packaging materials are acceptable for contact with certified organic products.

3. Pest management in processing facilities: Many conventional facility pest management programs use synthetic pesticides that are prohibited in organic handling operations. Your facility pest management program must use only NOP-approved pest control materials, and any pest management activity must be documented.

4. Equipment lubricants: Mechanical lubricants that contact food-contact surfaces must be food-grade and must not introduce prohibited substances into organic products.

5. Adjacent conventional production: Where shared equipment or adjacent production lines handle conventional products, validated cleaning must prevent any residue transfer.

Pest management in a certified organic handling facility requires the same hierarchical approach that NOP requires on the farm — beginning with prevention and proceeding to intervention only when necessary, using only NOP-approved materials.

The NOP pest management hierarchy for handlers (§ 205.271):

1. Prevention (primary): Facility design and management practices that prevent pest access and establishment

• Physical exclusion: screens, door sweeps, sealed pipe penetrations, proper loading dock management

• Sanitation: eliminating food sources, proper waste management, keeping facility clean and dry

• Environmental controls: temperature and humidity management that discourages pest establishment

2. Mechanical and physical controls (if prevention is insufficient):

• Traps, sticky boards, light traps

• Physical removal

3. Approved biological controls:

• Predatory or parasitic insects

• Approved biological pest control agents

4. Approved materials (only when other methods are insufficient):

• Only materials listed as approved on the National List (§ 205.605) may be used

• Application must not contact organic product or food-contact surfaces

• All pest management applications must be documented: date, material used, location, applicator

If you use a third-party pest control company, they must understand and operate within NOP's approved materials list. All pest control activities in your facility should be reviewed with your certifier.