Food from an unapproved supplier, unsafe or spoiled food, missing shellfish harvest tags, or raw fish without required parasite destruction.
Food held, cooled, cooked, or reheated outside safe temperatures, letting dangerous bacteria multiply.
Water not safe, or hot (100°F) and cold water not available under pressure.
Surfaces that touch food — cutting boards, ice bins, dish racks — soiled or not sanitized.
Dirty wiping cloths not stored in sanitizer, or soiled linens handled improperly.