Food held, cooled, cooked, or reheated outside safe temperatures, letting dangerous bacteria multiply.
Roaches, rodents, flies, or other pests present — or doors and openings that let them in not protected.
Raw meat, poultry, or seafood not separated from ready-to-eat food, or food left unprotected during prep, storage, or display.
Cleaning chemicals or other toxic substances unlabeled or stored where they can reach food.
Surfaces that touch food — cutting boards, ice bins, dish racks — soiled or not sanitized.