HAZWOPER Training: 40-Hour, 24-Hour and 8-Hour Refresher Explained

HAZWOPER Training Hours Explained

Updated November 6, 2026

How Many Hours of HAZWOPER Training Do I Need?

General site workers at cleanup sites need 40 hours off-site plus three days of supervised field experience. Workers on site only occasionally, or in lower-exposure areas, may qualify for 24 hours plus one day. Everyone covered needs an 8-hour refresher every year, under 29 CFR 1910.120(e).

Updated November 6, 2026 · Source: 29 CFR 1910.120(e).

Who Needs What

40 hours + 3 days field: general site workers exposed to hazardous substances, such as laborers and equipment operators at cleanup sites.
24 hours + 1 day field: workers on site occasionally for a specific task, and those in fully characterized areas below exposure limits with no respirator need.
8 more hours: on-site managers and supervisors, on top of the base course.
8 hours each year: the refresher for all.

Emergency responders are covered under separate levels in 1910.120(q). Treatment, storage and disposal sites have their own rule in 1910.120(p).

Choosing a Course

Check that the field experience is real and documented, since online lessons alone do not provide it. Keep your certificate and refresher dates. Find training providers, and use the training finder for other tasks.

General information, not legal advice. Rules change and State Plan states may differ, so confirm with the current standard or your state agency.

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