Food from an unapproved supplier, unsafe or spoiled food, missing shellfish harvest tags, or raw fish without required parasite destruction.
Cleaning chemicals or other toxic substances unlabeled or stored where they can reach food.
High-risk food (like meat) thawed improperly, promoting bacterial growth.
Plumbing not installed or maintained properly — leaks, mop sink issues, unserviced water filters, or missing backflow prevention.