Sen Lin, PrepPass Founder · Verified against OSHA — 29 CFR 1910.120 · How we review

OSHA HAZWOPER 40-Hour Study Guide (2026)

This is the free study guide for the OSHA HAZWOPER 40-Hour exam — the same content areas the exam tests, written to the official outline. Read any chapter online free below, then drill the material with 22+ free practice questions and a full timed mock exam.

Last updated: August 2026.

Open the full study guideEvery chapter, in one place — free to read online.

The 6 chapters

  1. 1Hazard Recognition & Toxicology17% of the exam
  2. 2PPE Use & Selection17% of the exam
  3. 3Safe Work Practices & Engineering Controls17% of the exam
  4. 4Decontamination & Emergency Response17% of the exam
  5. 5Medical Surveillance16% of the exam
  6. 6Site Safety & Health Personnel16% of the exam

Practice what you read

Reading is step one; recalling it under exam pressure is what passes. Drill free OSHA HAZWOPER 40-Hour practice questions, then sit a full timed mock exam.

Free practice questions →Timed mock exam →Cram sheet →

Educational summary, not a substitute for the official material — always confirm current details with OSHA — 29 CFR 1910.120. Last updated: August 2026.

Report