What do biohazard cleanup certifications actually mean?
IICRC S540 is the industry standard describing how this work should be done, and TCST certifies an individual technician against it. Both are voluntary — no government issues or checks them. State registration is the only item on this page a government requires, and only some states require it.
The distinction that matters
There are two completely different kinds of thing on this page, and companies routinely present the first as though it were the second.
A voluntary industry credential says a company or a person chose to be trained and assessed against a standard the industry wrote for itself. That is worth something. It is not a licence.
A government requirement says a state decided this work needs registering, and made it unlawful to do without. Only some states have done that.
IICRC S540 — Standard for Trauma and Crime Scene Cleanup
An ANSI-approved consensus standard describing how this work should be performed. First edition 2017, second edition 2023. A company saying it "works to S540" is telling you which rulebook it follows.
What it does not mean: It is not a licence, and no government agency issues or checks it.
TCST — Trauma and Crime Scene Technician
The IICRC's certification for an individual technician, built on the S540 standard. Ask whether the people who will actually be in your home hold it, not whether the company has ever employed someone who did.
What it does not mean: It certifies a person, not a company, and it is voluntary.
WRT and AMRT — water and mould credentials
Adjacent IICRC credentials in water damage restoration and applied microbial remediation. Commonly held by trauma crews because the two jobs overlap, and genuinely relevant after sewage or long-standing moisture.
What it does not mean: Neither is a trauma credential. Holding them does not substitute for S540 or TCST.
"OSHA certified"
A marketing claim, not a credential. OSHA sets training requirements that employers must meet — annual bloodborne pathogens training, a written exposure control plan, employer-paid protective equipment. It does not certify companies and issues no certificate a company can hold up.
What it does not mean: If a company says it is "OSHA certified," ask instead to see its written exposure control plan and its most recent training records. Those exist.
State registration, where a state requires it
The only item on this page that a government issues. California requires Trauma Scene Waste Practitioner registration before work begins. Florida requires biomedical waste transporter registration above a weight threshold. Most other states regulate only through general medical waste rules.
What it does not mean: Registration is a floor, not a recommendation. A state registering a company is not the state vouching for its work.
Why “OSHA certified” keeps appearing anyway
Because it sounds like the second kind and costs nothing to claim.
OSHA regulates employers. Under the Bloodborne Pathogens standard, an employer whose staff have reasonably anticipated contact with blood must maintain a written exposure control plan, apply universal precautions, provide protective equipment at the employer’s expense, offer hepatitis B vaccination free within 10 working days of assignment, and run annual training. Those are obligations, and a company either meets them or does not.
What OSHA never does is issue a certificate to a company. So when a company describes itself as OSHA certified, the useful response is not to argue but to ask for the documents that would exist if they were compliant: the written exposure control plan, and the most recent training records. What the standard actually requires.
What we are not telling you
Two organisations appear in industry material that we deliberately do not describe here.
ABRA — the site is robots-blocked and we could not verify any of its certification details. We are not repeating claims we could not check.
NIDS — we could not identify this organisation at all. It appears in some industry listings; we found nothing behind it. We do not reference it, and we would treat a company citing it as a prompt to ask questions.
We also cannot give you the prerequisites, hours or cost of the IICRC’s own certifications. Their site did not render for us, and rather than repeat figures from resellers we have left the numbers out. Ask the IICRC directly if the detail matters to you.
What to actually ask a company
Certification questions are only useful if they are specific. The two that get real answers:
- “Which of the technicians attending my property hold TCST?” — not whether the company has ever employed someone who did.
- “Can I see your written exposure control plan and your last training records?” — a compliant company has both and will not find the question strange.