Onion Inspection Violations: What Detroit Health Inspectors Look For

Temperature Control Violations with Cut Onions

Detroit health inspectors check whether sliced or diced onions are maintained at proper temperatures, typically requiring cold storage at 41°F or below per FDA guidelines. Pre-cut onions left at room temperature for more than two hours (or one hour if ambient temperature exceeds 90°F) violate Detroit's food code and pose pathogenic risks like Salmonella and Listeria monocytogenes. Inspectors use calibrated thermometers to verify cooler temperatures and examine time-stamped prep logs. Violations occur when onions sit in warming stations, prep tables, or on line without active cooling devices. Restaurants must discard improperly stored cut onions rather than refrigerate them after extended exposure.

Cross-Contamination and Raw-to-Ready Sequencing

Detroit inspectors assess whether raw onions are stored separately from ready-to-eat foods to prevent cross-contamination during handling. Raw onions must be positioned below cooked foods, seafood, and dairy in vertical storage arrangements per Detroit Health Department guidelines. Common violations include raw onions stored directly above prepared salads, proteins, or sauces, which allows drips or debris to contaminate ready-to-eat items. Staff handling raw onions must change gloves before touching other ingredients—inspectors often find violations when the same gloved hand is used for multiple tasks. Contamination risks increase when onion prep areas lack dedicated cutting boards or when staff reuse utensils without washing between tasks.

Storage Conditions and Pest Control in Onion Areas

Detroit inspectors examine whether onion storage areas maintain proper ventilation, moisture control, and pest protection. Whole onions require cool, dry, dark storage between 50°F and 70°F with good air circulation to prevent sprouting and decay; violations include onions stored in damp areas or directly on floors without shelving. Inspectors document violations when onion bins are uncovered, allowing dust, debris, or pest access—Detroit's health code requires covered containers or sealed storage in pest-proof areas. Onions showing signs of mold, sprouting, or rot must be discarded; inspectors cite restaurants for storing deteriorated onions alongside fresh inventory. Poor labeling of onion prep dates also triggers violations, as inspectors cannot verify whether stored onions meet use-by requirements.

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