Free REHS/RS Exam Prep
Registered Environmental Health Specialist/Registered Sanitarian (REHS/RS)
Prepare for the REHS/RS exam without spending hundreds on expensive prep courses. Free study guides, practice questions, flashcards, and related exam resources.
Quick Facts
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REHS/RS NEHA Environmental Health Certifications License: Complete Roadmap
Follow this path to organize your licensing and exam preparation
Phase 1: Inspections (48%)You are here
Prioritize the largest domain: facility and system inspection workflows across food, water, wastewater, housing, institutions, recreation, waste, vectors, and related settings.
Phase 2: Investigations (18%)
Practice complaint, outbreak, exposure, sampling, evidence, and hazard-investigation decisions.
Phase 3: Surveillance and Compliance Review (24%)
Connect surveillance findings to prioritization, plan and record review, corrective action, and defensible enforcement.
Phase 4: Environmental Health Information (10%) and Timed Practice
Review data interpretation and risk communication, then rehearse both 110-minute exam parts.
Can You Take the REHS/RS Exam?
Check if you meet the basic eligibility requirements
- •Track C (In-Training) available for candidates meeting education requirements but lacking 2 years of experience
- •90-day waiting period between exam retake attempts
- •24 hours of continuing education every 2 years to maintain credential
- •Foreign degree holders must obtain NACES evaluation
REHS/RS Quick Facts
Time to Get Licensed
10-16 weeks for most candidates
From start to license in hand
Retake Policy
Candidates must wait at least 90 days between attempts. There is no limit on the number of retakes, but exam fees and computer testing fees must be repaid for each attempt.
Total Cost Breakdown
Free REHS/RS Prep Tools
Reported exam pass rate: NEHA does not publicly publish an official first-time pass rate for the REHS/RS exam.. Check the exam sponsor for the latest official figure.
100 Practice Questions
Current local practice inventory across all five REHS/RS domains with detailed explanations.
AI-Powered Learning
Scenario-based explanations for inspection, investigation, and compliance questions.
2026 Updated
Aligned with current NEHA exam content outline, fees, and eligibility tracks.
Free Access
Start REHS/RS prep free before investing in exam fees and study materials.
What You'll Study
8 chapters covering the exam topics in this guide
Chapter 1: Food Safety Inspections
3 sections
Chapter 2: Recreational & Institutional Inspections
3 sections
Chapter 3: Solid & Hazardous Waste Inspections
2 sections
Chapter 4: Potable Water Systems
3 sections
Chapter 5: Onsite Wastewater Systems
2 sections
Chapter 6: Occupational Safety & Investigations
4 sections
Chapter 7: Epidemiology & Legal Compliance
7 sections
Chapter 8: Public Health Awareness & Emergency Response
4 sections
REHS/RS Exam Details
Registered Environmental Health Specialist/Registered Sanitarian (REHS/RS)
Administered by National Environmental Health Association (NEHA)
Exam Content Breakdown
Based on the official National Environmental Health Association (NEHA) content outline
Monitor population and environmental health indicators, identify trends, and support prevention priorities.
Conduct food, water, wastewater, housing, institutional, recreational, waste, vector, and other environmental health inspections.
Investigate complaints, outbreaks, exposures, hazards, and other environmental health events using defensible evidence.
Evaluate plans and records, apply requirements, communicate findings, and support enforcement or corrective action.
Collect, interpret, document, and communicate environmental health information for decisions and public protection.
What's Included
8 Chapters
Complete exam coverage
Practice Quizzes
With detailed explanations
Free to Start
No credit card required
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What's Next After the REHS/RS?
After passing the REHS/RS, you can pursue these career paths
NEHA CP-FS
Food safety specialist credential that deepens HACCP and regulatory expertise beyond general REHS scope.
BCSP CSP
Certified Safety Professional credential for environmental health specialists expanding into occupational safety management.
CIH
Certified Industrial Hygienist credential for specialists focused on workplace exposure assessment and control.
REHS/RS Exam FAQ
Official National Environmental Health Association (NEHA) Resources
Verify information with these official sources
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Ready to Start Your Free REHS/RS Prep?
Review the study guide, practice key concepts, and use the free tools at your own pace.