Water not safe, or hot (100°F) and cold water not available under pressure.
Handwash sink missing, blocked, or used for other purposes, or missing soap, towels, or the handwash sign.
Missing hair or beard restraint, dirty work clothes, jewelry, or painted/artificial fingernails during food prep.
Surfaces that touch food — cutting boards, ice bins, dish racks — soiled or not sanitized.
Plumbing not installed or maintained properly — leaks, mop sink issues, unserviced water filters, or missing backflow prevention.