Certifications that actually matter

There are two completely different kinds of credential in this trade, and companies routinely present the first as though it were the second.

Voluntary versus required

A voluntary industry credential says a company or person chose to be trained and assessed against a standard the industry wrote for itself. That is worth something. It is not a licence, and no government issues or checks it.

A government requirement says a state decided this work needs registering and made it unlawful to do without. Only some states have.

What each one actually is

IICRC S540 is the ANSI-approved consensus standard for trauma and crime scene cleanup — first edition 2017, second edition 2023. A company saying it “works to S540” is telling you which rulebook it follows.

TCST is the IICRC’s certification for an individual technician, built on S540. It certifies a person, not a company. The question worth asking is whether the people who will actually be in your home hold it — not whether the company has ever employed someone who did.

WRT and AMRT are adjacent water-damage and mould credentials, commonly held because the jobs overlap, and genuinely relevant after sewage or long-standing moisture. Neither substitutes for S540 or TCST.

State registration is the only item a government issues, and only some states require it.

What we could not verify, and therefore do not say

We cannot give you the prerequisites, hours or cost of the IICRC’s certifications — their site did not render for us, and we will not repeat figures from resellers. We do not describe ABRA, whose site is robots-blocked. We do not reference NIDS at all, because we could not identify the organisation behind the acronym. A company citing it is a reason to ask more questions, not fewer.