NEHA Study Guide 2026
Everything you need to pass the NEHA exam in one place: the exam format, every topic to study, real practice questions with explanations, flashcards, and full-length practice tests. Free, no sign-up needed.
NEHA exam key facts
- The NEHA REHS/RS exam consists of two parts containing a total of 225 multiple-choice questions (113 in Part 1 and 112 in Part 2), with 200 scored questions and 25 unscored pilot questions. Source
- The NEHA REHS/RS exam reports scores on a scale ranging from 0 to 900 with a scaled passing score of 650. Source
- Candidates can take the NEHA REHS/RS exam as many times as needed, but must wait at least 90 days before retaking the exam. Source
- The NEHA REHS/RS credential is valid for two years, after which it must be renewed. Source
📋 NEHA Exam Format at a Glance
📚 NEHA Topics to Study (20)
✍️ Sample NEHA Questions & Answers
1. What is a 'threshold limit value (TLV)' as published by the American Conference of Governmental Industrial Hygienists (ACGIH)?
ACGIH TLVs are professionally recommended occupational exposure guidelines — not legal standards — representing concentrations to which nearly all workers can be repeatedly exposed day after day without adverse health effects.
2. In environmental health inspections, what practice is most effective for preventing rodent entry into structures?
Exclusion is the most permanent and effective rodent control strategy, involving the physical sealing of all entry points ≥ 1/4 inch since mice can enter through very small gaps.
3. Which solid waste management strategy is ranked highest in the EPA's solid waste management hierarchy?
Source reduction and reuse are ranked highest in the EPA hierarchy because preventing waste generation is more effective than managing waste after it is created.
4. Under what conditions can an environmental health official conduct an inspection of a regulated facility without a warrant?
The US Supreme Court has established that administrative inspections of pervasively regulated industries may be conducted without a warrant when performed during business hours in accordance with a regulatory inspection scheme.
5. What personal protective measure is recommended for preventing tick-borne disease during outdoor activities?
EPA-registered repellents containing DEET applied to skin and permethrin applied to clothing, combined with thorough post-activity tick checks and prompt tick removal, are the recommended personal protection measures.
6. What is the “Danger Zone” temperature range where bacteria multiply most rapidly in food?
Bacteria grow most rapidly between 40°F and 140°F, increasing the risk of foodborne illness if food is left in this temperature range for too long.
🎯 Free NEHA Practice Tests
📖 NEHA Guides & Articles
What Practice Test Geeks adds beyond an AI chat for NEHA
An AI chatbot can quiz you, but it can't reproduce the exam conditions or keep your record. Here you get:
- A timed, full-length NEHA mock exam — 225 questions in 220 minutes with a 68% pass mark, modeled on the official exam's question count and time limit, followed by a score report broken down by exam domain.
- A fixed NEHA question bank: the same test every attempt, so your score is comparable from one try to the next instead of changing with every regenerated quiz.
- Progress saved on your device: completed tests, scores and missed questions stay in My Progress, so you can retake only what you got wrong.
- A printable NEHA cheat sheet you can print or save as a PDF.
- NEHA flashcards built from the same question bank.
- Free NEHA practice tests with the correct answer shown after each question.
How this page was made: written with AI tools and published by Nathan Beja, founder of Practice Test Geeks, who is responsible for its content. Exam facts are checked against the official sources listed below. Not reviewed by a subject-matter expert. Editorial policy
Sources & references
Exam facts on this page (fees, format, dates, passing scores) are checked against these official sources; the date is our last check. Editorial policy
- neha.org — Test delivery, exam format, passing score, registration deadline, renewal, retake policy, score release, score validity · verified Oct 2026
- home.pearsonvue.com — Test dates · verified Oct 2026