HAZWOPER stands for Hazardous Waste Operations and Emergency Response. It applies to particular hazardous waste operations and emergency-response duties. It is not a blanket requirement for everyone who handles chemicals.
At a glance
Covered general hazardous-waste site workers ordinarily need 40 hours of instruction plus three supervised field days. Some limited-task workers qualify for a 24-hour path plus one field day. Confirm the exact OSHA provision with your employer before choosing a course.
Start with the work, not the course length
Ask whether the job involves general hazardous waste site work, occasional or limited-exposure tasks at a covered site, or emergency response. Different parts of OSHA’s standard address those situations. A job posting that only says “HAZWOPER required” is not enough to determine which training is appropriate.
24-hour vs. 40-hour HAZWOPER
40-hour instruction: Covered general site workers ordinarily need at least 40 hours of initial instruction plus three days of supervised field experience under 29 CFR 1910.120(e)(3)(i).
24-hour instruction: Certain workers assigned occasional limited tasks, or working in fully characterized areas under the conditions described in the standard, may qualify for 24 hours of instruction plus one day of supervised field experience. If their duties expand, an additional 16 instructional hours and two field days may be required.
Supervisors: Covered site managers and supervisors have additional training obligations. A standard worker course should not be assumed to satisfy them.
Does online training satisfy HAZWOPER?
An online course can supply instructional content, but it does not replace supervised field experience, required worksite instruction, or job-specific evaluation. Before enrolling, confirm who provides these elements and how the employer will document them.
What about the annual refresher?
Covered workers and supervisors under OSHA’s hazardous waste site employee-training provisions generally need eight hours of refresher training each year. Initial training and annual refresher training are different products. Emergency-response personnel may be subject to different training and competency requirements.
Five checks before buying
Confirm (1) which part of 29 CFR 1910.120 applies; (2) whether this is initial, refresher, supervisor, or emergency-response instruction; (3) who supplies field experience; (4) which completion records your employer requires; and (5) whether the job instead requires DOT hazmat shipping training.
Related resources
For preparing or shipping regulated hazardous materials, read our DOT Hazmat employee training guide. Explore Hazmat and Dangerous Goods for related topics.
Source and last review
Reviewed October 9, 2026. Primary source: OSHA’s HAZWOPER standard, 29 CFR 1910.120. Provider prices and enrollment links are added only after verification.