REHS: Registered Environmental Health Specialist Exam Practice Test

Eligibility is determined by the state or local agency sponsoring the exam, as requirements can vary. Typically, candidates must hold a bachelor's degree from an accredited institution with a major in environmental health, or a related science (e.g., biology, chemistry) with specific core course credits. Most jurisdictions also require a period of professional work experience under the supervision of a registered specialist. You must apply through your state or local environmental health authority, which will verify your credentials before granting approval to test through NEHA.

The REHS exam is a computer-based test consisting of approximately 120-140 multiple-choice questions, to be completed within 3 hours. Questions are drawn from the official exam blueprint covering all major domains of environmental health practice. The passing scaled score is 70. The exam uses scaled scoring to account for minor variations in difficulty between different test forms, ensuring a consistent standard is maintained across all administrations.

Effective preparation is multi-faceted. Begin by thoroughly reviewing the official NEHA REHS Exam Blueprint and study guide. Utilize core textbooks such as 'Principles of Environmental Health' and reference current regulations like the FDA Food Code. Gaining practical field experience is invaluable. Many candidates benefit from forming study groups, taking accredited review courses, and completing practice question banks. Focus on understanding concepts and their application, not just memorization, and dedicate consistent study time over several months.

The REHS is a professional certification issued by NEHA, a non-profit association, based on passing a national exam. A state license or registration is a legal authorization to practice, issued by a government agency. Most states require the REHS credential (or a state-specific exam) as a core component of their licensing process. The REHS provides national portability and recognition, while the state license grants the legal authority to enforce regulations within that specific jurisdiction.

To maintain the REHS credential, registrants must earn 24 continuing education contact hours (CEHs) every two-year renewal period. These CEHs must be relevant to environmental health practice and can be obtained through conferences, workshops, college courses, webinars, and other NEHA-approved activities. Documentation must be submitted to NEHA to demonstrate compliance, ensuring certified professionals remain current with evolving science, technology, and regulations.