Cleaning chemicals or other toxic substances unlabeled or stored where they can reach food.
Dish machine or sinks not set up or working properly, or missing sanitizer test kit and gauges.
Water not safe, or hot (100°F) and cold water not available under pressure.
Plumbing not installed or maintained properly — leaks, mop sink issues, unserviced water filters, or missing backflow prevention.
Garbage overflowing or uncovered, or the premises not maintained.