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.
Restrooms not clean, stocked, or maintained as required.
Scoops and other in-use utensils stored improperly (e.g. handle down in the food).
Plumbing not installed or maintained properly — leaks, mop sink issues, unserviced water filters, or missing backflow prevention.