National Environmental Health Association (NEHA) · NEHA's currently linked, undated five-domain REHS/RS Credential Exam Content outline, checked 2026-10-20. The outline displays no revision number or effective date. A separate NEHA announcement identifies September 1, 2021 as the launch date of a revised examination; it does not date the current PDF. NEHA explicitly identifies the 2017 FDA Food Code as the food-protection basis of its current credentialing examination. The workbook label matches the NEHA credential.

This original 20-question sample covers selected topics across the outline. It does not reproduce official exam questions or cover every tested topic.

• Registered Environmental Health Specialist/Registered Sanitarian Credential
• Registered Environmental Health Specialist/Registered Sanitarian (REHS/RS) Credential Exam Content
• NEHA Updating REHS/RS Exam and Study Guide
• NEHA Credentialing Handbook: Guide to Policies and Procedures
• Describing Epidemiologic Data
• Updated Guidelines for Evaluating Public Health Surveillance Systems
• Analyzing and Interpreting Data
• Conducting a Field Investigation
• Principles of Epidemiology: Investigating an Outbreak
• FDA Food Code 2017
• How Septic Systems Work
• Drinking Water Distribution System Tools and Resources
• Cross-Connection Control: A Best Practices Guide
• Home Pool and Hot Tub Water Treatment and Testing
• Defining Hazardous Waste: Listed, Characteristic and Mixed Radiological Wastes
• Hazardous Waste Characteristics
• A Brief Guide to Mold, Moisture and Your Home
• Explain Working Levels and Picocuries Per Liter of Air
• 29 CFR 1910.1030: Bloodborne Pathogens
• Hierarchy of Controls
• Biological Contaminants and Indoor Air Quality
• Integrated Pest Management Principles
• Questions and Answers About Understanding Lead Inspections, Risk Assessments and Abatements
• Hazard Standards and Clearance Levels for Lead in Paint, Dust and Soil
• HACCP Principles and Application Guidelines
• Food Establishment Plan Review Guide
• Communicating During an Outbreak or Public Health Investigation
• Drinking Water Advisories: An Overview