Mold Remediation Certification: Which Credentials Mold Techs Need

Not a government one.

OSHA has no mold-specific standard: its mold standards page points to general sanitation standards and to non-regulatory consensus standards such as IICRC S500 and S520, and says plainly that those are not OSHA regulations.

EPA's guidance for professionals is the published guide “Mold Remediation in Schools and Commercial Buildings” (EPA 402-K-01-001, reprinted September 2008) — guidance, not a credential.

Our research found no mold certification issued by either agency, so a course marketed as an “OSHA mold certification” or an “EPA mold certificate” is a private training product wearing a federal name.

What exists instead runs on two tracks: private industry bodies that certify — the IICRC, ACAC and NORMI issue the credentials described below — and, in the states that license mold work, the state itself, which issues the credential that carries legal weight.

That distinction is the subject of this page.

A certification is a private body's assessment of your training or experience; a license is a state's permission to work.

They come from different issuers, they mean different things to an employer and to a regulator, and sorting out which one a job requires before you spend money is the point.

Here is what each body offers, with the entry requirements it publishes.

The credentials fall into three shapes: course-based (attend a class, pass the exam), experience-boarded (document years in the field, defend them to a board) and provider course credentials (complete that organization's own course).

IICRC AMRT — Applied Microbial Remediation Technician.

The IICRC's course-based technician certification covers mold and sewage remediation, and it carries one hard prerequisite: the Water Restoration Technician (WRT) certification comes first.

The IICRC does not run classes itself — it approves independent schools and instructors, so every IICRC class is taught by a third party.

AMRT was not on the IICRC's list of certifications available by live-stream as of October 2026.

Confirm the current format, length and cost with the IICRC or the approved school — the sources we checked do not state an AMRT class length.

IICRC MRS — Mold Remediation Specialist.

The MRS is the experience-based route: no course at all.

Applicants need at least one year of verifiable hands-on mold remediation field experience, and supervisory or inspection jobs do not count toward it unless you personally did the remediation work on those jobs.

The application costs $150, and once the IICRC approves it — a staff review inside 10 business days — a $300 exam fee opens a 90-day window to schedule and sit the exam, including any retest.

The exam is a 2-hour, 100-question multiple-choice test delivered through the IICRC's online proctoring; miss the window and you wait a year before reapplying.

ACAC CMR and CMRS — Council-certified Microbial Remediator and Microbial Remediation Supervisor.

ACAC boards its certifications on documented experience: the CMR asks for two years of field experience and the CMRS eight, and both accept mixes of experience and college credits.

Candidates document the field work with four project sheets plus transcripts, and awarding the credential takes a unanimous approval by the certification board.

The ACAC exams are closed-book multiple choice — 75 to 120 questions depending on the credential, with the CMR exam at 100 questions and the CMRS at 120, each requiring a 75% score — taken at a Kryterion testing center or by online video proctoring.

A failed exam can be retaken for a $100 re-exam fee.

Costs and upkeep: accredited certification runs $500 for the first two-year term — $400 certification plus $100 exam — and $400 per recertification.

Each two-year renewal takes 40 re-certification credits (RCs): 10 for staying active in the field plus 30 hours of professional development.

ACAC's accreditation comes from CESB, the Council of Engineering and Scientific Specialty Boards — not ANSI or ISO.

Its vocational CRMR, the Council-certified Residential Microbial Remediator, asks only for current employment in the field, and it is not CESB-accredited.

NORMI — National Organization of Remediators and Microbial Inspectors.

NORMI says it has trained mold and indoor-environment professionals since 2004 and offers more than 32 certifications, including the CMA (Certified Mold Assessor), CMR (Certified Mold Remediator), QMI (Qualified IAQ/Mold Inspector) and state-track courses oriented to Florida and New York licensing.

Mind the initials trap: NORMI's CMR is a 24-hour-course credential, a different certification from ACAC's experience-boarded CMR despite the identical acronym.

Read the body behind the letters before you put a CMR on a résumé — or before you screen one on a hire.

NORMI also publishes its own statements about appearing on state approved-provider lists; treat those as the vendor's claim and confirm on the state agency's own list before you pay for a class.

Certified Mold Professional (CMP).

The RIA's current advanced designation list — Certified Restorer, Fire Loss Specialist, Contents Loss Specialist, Water Loss Specialist and Environmental Risk Specialist — includes no mold-specific credential.

Our research did not confirm that a current course or exam leads to the CMP designation, so check the letters' status with the issuing association before you rely on one.

The field in one table.

A certification and a license answer different questions, and the difference decides what you actually need.

As of October 2026, the states that run mold licensing programs are Texas, Florida, New York, Louisiana and Washington DC.

The edges of that list are where the rules differ, so read it together with the notes that follow it.

• Texas: the Texas Department of Licensing and Regulation licenses mold work across seven credential types — mold remediation worker registration, mold assessment technician, mold remediation contractor, mold assessment consultant, mold assessment company, mold remediation company and mold analysis laboratory.
• Florida: the Department of Business and Professional Regulation licenses mold assessors (MRSA) and mold remediators (MRSR), and the license covers assessment or remediation of growth greater than 10 square feet.
• New York: the Department of Labor runs the mold program under Labor Law Article 32, licensing mold assessors, remediation contractors and abatement workers. It is unlawful to work as, advertise as or hold yourself out as any of the three without a valid license for the type of work, and licensing applies to projects over 10 square feet.
• Louisiana: the LSLBC requires a Mold Remediation license for remediation projects worth $7,500 or more, and the qualifying party needs 24 hours of training in mold remediation and basic mold assessment.
• Washington DC: DC's DOEE licenses mold assessment and remediation professionals for two-year terms — $300 to apply, $105 to renew. Applicants must be at least 18, pass a DOEE-approved mold exam within the past two years and meet one of several education-and-experience pathways; remediators also document at least $1,000,000 in general liability coverage including mold and pollution coverage.

New York's licenses also carry their own training requirements: the initial course is a 4-day mold assessor course, a 3-day mold remediation contractor course or a 2-day mold abatement worker course, depending on the license.

Licenses last two years, and every renewal takes a 4-hour DOL-approved refresher — the refresher may be delivered live online, the initial course may not.

The picture moves, which is why the as-of date matters:

• Illinois: the Mold Remediation Registration Act (Public Act 103-0893) is enacted, but registration is not in effect until the Illinois Department of Public Health adopts rules, proposed October 17, 2025. Until then, IDPH says mold remediation professionals are not required to register.
• Maryland: the state's 2008 mold remediation firm licensing law was never implemented for lack of funding and was scheduled to terminate July 1, 2019. Directory pages that still list Maryland as a licensing state are out of date.
• Connecticut: from October 1, 2026, Connecticut's home improvement contractor certificate for mold remediation requires an attestation that the contractor is certified by the IICRC, NORMI or another organization the Department of Consumer Protection commissioner approves. The work itself must be performed in accordance with ANSI/IICRC S520, Fourth Edition, or a successor the department approves.
• Virginia: the state's mold inspector and remediator regulations were repealed effective August 15, 2012, so Virginia has no current state mold license. Instead, selling residential mold remediation services without a certification from a nationally or internationally recognized certifying body is a Consumer Protection Act violation. The same provision requires following the EPA mold guide, ANSI/IICRC S520 or an equivalent ANSI-accredited standard.

The assessor-and-remediator split matters for your credential plan too.

Texas lets one person or company hold both assessment and remediation licenses but bars doing both on the same project — school-district employees working on a project for that district are the exception.

Florida bars a remediator from assessing a structure they remediated within the last 12 months, with certified Division I contractors excepted.

New York statute bars any licensee from doing both on the same project.

And where no state license exists at all, the work is not rule-free.

OSHA's workplace standards still apply to employees, and a state's contractor or home improvement rules can still reach the job.

Connecticut and Virginia show how a state can route its requirement through certification instead of licensure.

Confirm the state you work in with that state's own agency — one state's rule never transfers to another.

Start with the states: where a state licenses the work, the license is the legal requirement, and a certificate does not stand in for it.

New York is the plain example — it is unlawful to work as, advertise as or hold yourself out as a mold assessor, remediation contractor or abatement worker without the Department of Labor license, whatever certificates hang on the wall.

Where a state mandates certification instead, the credential becomes part of the legal requirement — and the statute tells you which bodies count.

Connecticut's attestation names the IICRC, NORMI or another organization its Department of Consumer Protection commissioner approves.

Virginia's provision is broader: any nationally or internationally recognized certifying body for mold remediation, not one brand by name.

The states also run their own exam and training machinery, and private courses and exams can appear on a state's approved lists.

ACAC reports exam scores directly to state licensing agencies for state license applicants, and its CMR/CMRS handbook lists qualifying applicants for certain state licenses among the credentials' purposes — but which states accept which exams is settled on each state's own approved list, never assumed.

DC requires a DOEE-approved exam, New York requires its own DOL-approved courses, and Louisiana's approved training list includes at least one 24-hour web-based course.

For employers, the honest answer is that no national dataset tells you which credential the industry prefers — our research did not find one — so treat the postings for the roles and states you want as the real test.

What is verifiable is the credential itself: check the letters with the organization that issued them.

The structural read is simpler than the marketing.

The IICRC route runs through coursework — WRT first, then AMRT — or, for experienced hands, the MRS exam on a year of field experience.

ACAC boards its credentials on documented years in the field, unanimous board vote included.

NORMI sells course-based credentials, including state-track courses aimed at particular states' licensing requirements.

Pick by your experience clock, your state's rules and the employers you are aiming at, in that order.

Before you spend money, make sure you want the work: the mold remediation technician role guide covers what the job involves day to day.

Then work the route in order.

Career information, not licensing, legal, insurance or safety advice. Certification rules, state licenses, fees, exam formats and renewal terms change — confirm the current requirements with the state agency or the certifying body named before you enroll, test, apply or renew.