What IICRC certification means, and what it does not

Two different things share one name

People say IICRC when they mean either of two things. The Institute of Inspection, Cleaning and Restoration Certification publishes the ANSI/IICRC consensus standards that describe how restoration work should be done. It also certifies individual technicians and firms. Neither is a government license, and neither stands in for one.

EPA’s flood cleanup pages make the point plainly. They list IICRC with NEHA, AIHA and ACAC as professional organizations whose certification a contractor may hold, and they say EPA does not have a certification program. Michigan’s health department says the State of Michigan does not provide certification for mold remediators or mold testing companies. So when a company says it holds an IICRC credential, it is describing a voluntary credential from a private body. That can be a good sign. It is not a license, and a company that calls itself IICRC licensed is using the wrong word.

The standards, and which edition is current

IICRC lists ANSI/IICRC S500 for water damage, S520 for mold, S530 for indoor environment assessment (a draft), S540 for trauma and crime scenes, S590 for HVAC assessment, S700 for fire and smoke, and S800 and S900. The ones a homeowner meets:

• S500, Standard for Professional Water Damage Restoration: fifth edition, 2021. A consensus body has begun revising it. It assumes the property owner is responsible for fixing the source of the water.
• S520, Standard for Professional Mold Remediation: fourth edition, 2024, after editions in 2015, 2008 and 2003. It covers residential, commercial and institutional buildings.
• S700, Standard for Professional Fire and Smoke Damage Restoration: first edition, 2025. It excludes wildfires and chemical or industrial fires.
• S540, Standard for Trauma and Crime Scene Cleanup: second edition, 2023. It assumes scenes have been released by law enforcement and covers blood and other potentially infectious material.

If a page or a salesperson cites the 2015 editions of S500 or S520 as current, they are out of date. Ask which edition a company follows.

What the public S500 text covers

The full definitions of Category 1 and Category 2 water and of Class 1 through 4 are in the paid S500 text, so they are not printed here. What is public is short. The S500 consensus body quotes Category 3 water as grossly contaminated and able to contain pathogenic, toxigenic or other harmful agents, with sewage and wasteline backflows beyond any trap as examples. It also says top-down water ingress, wind-driven rain and weather-related water are not automatically considered Category 3, and that the category is set by inspection.

So a fair question to put to a company is simple: which category and class did you record, and what did you inspect to decide? A company that can answer in a sentence has done the inspection. Our water category explainer lists the follow-up questions, and the categories and classes guide goes further.

The technician credentials

IICRC’s technician certifications that matter here, with their prerequisites:

1. Water Damage Restoration Technician (WRT): no prerequisite.
2. Applied Structural Drying (ASD): requires WRT.
3. Applied Microbial Remediation Technician (AMRT): covers mold and sewage; requires WRT.
4. Fire and Smoke Restoration Technician (FSRT): no prerequisite.

A crew can hold these in different combinations, which is why the useful question is who on this job holds which credential. A firm can hold a certification as well, and IICRC links a Locate a Certified Pro tool from its Certified Firms page. The link is visible in the page’s code, but the tool itself was not opened, so how it works is unconfirmed here. Use it, and also ask for the certificate.

The licenses a certification does not replace

Several real rules sit beside the voluntary credentials. A person who contracts for pay to repair, alter or improve a one- or two-family home needs Michigan’s residential maintenance and alteration license once one project reaches $600, and the crafts list in that law does not include water, mold or fire restoration, so the license attaches to the rebuilding. Licensed electricians, plumbers and mechanical contractors work under their own licenses for their own trades. Friable asbestos removal needs a state asbestos license, and EPA’s lead rule requires firm certification for paid work that disturbs painted surfaces in pre-1978 homes.

An IICRC credential covers none of these. A company can be very good at drying and still be unlicensed to rebuild, and the reverse. Ask for both.

Claims to question

A few statements turn up on restoration pages and sales calls that the public record does not support. “IICRC licensed” is one, for the reason above. “Required by Michigan law” is another: we found no Michigan statute or rule that requires IICRC credentials for water, fire or mold work. A third is quoting an old edition as current. And “all storm water is Category 3” misreads the standard, which says weather-related water is not automatically Category 3.

None of this makes IICRC credentials worthless. A technician who has taken the training knows the vocabulary, and a written scope that cites the current standard is easier to check than one that does not. The point is to treat the credential as a question you can verify rather than a conclusion.

How to use the credential in a conversation

Do not stop at the word. Ask for the credential holder’s name, the date and the certificate. Ask which standard and edition the written scope follows. Ask who will be on your job and who supervises. If the answers are specific, the credential has meaning. If they are vague, you have learned something without spending anything.

Referral companies, including ours, pass requests to independent firms and cannot vouch for their credentials. We do not check IICRC status, and no page here says a company we match you with holds it. Our guide to choosing a company lists the checks you can make yourself.