The questions technicians, contractors and property owners actually type into a search box — answered directly, with a link to the page that goes deeper on each one.
By the AMRTTraining.com team
AMRT stands for Applied Microbial Remediation Technician. It is an IICRC certification covering mold and microbial remediation, covering the topics in the ANSI/IICRC S520 standard — the document that defines Conditions 1, 2 and 3, containment requirements, and post-remediation verification.
AMRT stands for Applied Microbial Remediation Technician. It is the IICRC's technician-level credential for people who contain, remove and verify microbial contamination in buildings. The name matters on the exam because the work is defined as microbial remediation, not mold removal — you are dealing with fungi, and in Category 3 work, bacteria and other contaminants as well.
Take an IICRC-approved AMRT course from an approved school and pass the exam. You hold the WRT certification first, register for a class through a school rather than through the IICRC directly, complete the course, then sit the exam. Our class directory lists upcoming AMRT courses by state so you can see dates and schools in one place, and our certification guide walks the full sequence.
It is proof that a named person completed an approved course and passed the associated exam. A certificate is issued by a certifying body such as the IICRC, not by a government agency, and it belongs to the individual rather than the company. It is not a state licence, and in regulated states it does not by itself allow you to sell remediation work.
It is worth it if you are doing or bidding mold work, or if a state licence or a customer requires a recognized credential. AMRT gives you the S520 framework that decides containment, PPE and clearance on every job, and it is the credential most restoration employers and insurers recognize for mold. If you never touch microbial work, WRT alone may be enough.
Course length is set by the approved school running the class, and formats vary between in-person, live online and hybrid. Schools publish their schedules with the class listing, so check the specific course rather than assuming a standard length. Our class directory shows upcoming AMRT classes with dates and the school running each one.
Yes. The IICRC requires Water Damage Restoration Technician (WRT) certification as a prerequisite for AMRT. The mold class assumes you already understand water categories, moisture behaviour and drying, so it does not reteach them. If you do not hold WRT yet, take that first — our sister site WRTTraining.com covers that exam.
Yes, in the sense that approved schools offer live online AMRT classes, and the exam can generally be taken remotely with proctoring. What you cannot do is skip the approved course. Check whether a specific class is live online or self-paced before you register, and confirm proctoring arrangements with the school.
The total is made up of separate components: the school's course tuition, the certification exam fee, any course materials, and the ongoing renewal and continuing education costs afterwards. Tuition is set by each school and the exam fee is set by the IICRC, so the only accurate number comes from the school you register with plus the current IICRC fee.
It is a working technician's exam: heavy on judgment, light on memorization. Most of the difficulty comes from scenario questions where several answers look reasonable and only one matches the S520 approach, and from pacing under the clock. Technicians who already hold WRT and who drill timed practice questions generally find it manageable.
The IICRC sets the number of questions, the time limit and the passing score; confirm current details when you register for the exam at iicrc.org. Pacing matters as much as knowledge either way, so our timed simulator runs against a countdown with no backtracking and the clock is not a surprise on exam day.
The exam fee is paid to the IICRC, separately from class tuition. As listed by IICRC-approved schools Reets Drying Academy (reetsdryingacademy.com) and The Academy of Textiles and Flooring (atfinfo.com), the AMRT exam fee is $150. Those are their published figures, not ours — confirm the current fee at iicrc.org when you register.
Jon-Don's AMRT course page lists the class as a 4-day course, offered in person only, and approved for 14 IICRC CECs. Those are the school's published details; schedules and CEC credit are set per school, so confirm both with the provider you book.
IICRC certifications are maintained through renewal and continuing education rather than lasting indefinitely. You keep the credential current by earning approved continuing education credits and paying the renewal fee on the IICRC's schedule. Confirm the current renewal cycle and credit requirements directly with the IICRC, since these are set by them and can change.
AMRT is the technician-level mold credential; MRS (Mold Remediation Specialist) is aimed at people directing and supervising mold projects rather than only performing field work. They cover the same S520 material at different depths and responsibilities, and MRS has its own prerequisites. Which one you need depends on whether you run jobs or work them.
Mold biology and health effects, the S520 Conditions 1/2/3 framework, containment and engineering controls, negative air and HEPA filtration, PPE selection, remediation methods, post-remediation verification and clearance sampling, the role of the independent IEP, and documentation.
Most technicians who already hold WRT need two to three weeks of consistent study — roughly 30 to 45 minutes a day working through the seven S520 modules, then repeated timed practice exams until you are clearing 80% comfortably.
Yes. The exams page runs a scored practice test with no account and no card, plus additional questions with full S520 explanations. Members get the full 200+ question bank and the timed full-length simulator.
Our class directory lists upcoming IICRC AMRT courses by state with dates, cities and the school running the class. Registration goes through the school; we do not teach classes or issue certifications.
All 7 AMRT study modules, unlimited practice exams drawn from 200+ questions with detailed explanations, the timed full-length simulator, score tracking and a topic mastery heatmap, plus the free calculators, flashcards and glossary.
You get 1 full day free with no credit card required. After that membership is $9/month, and you can cancel anytime from your dashboard — access continues to the end of the billing period you have already paid for.
Several states license mold assessment or remediation separately from any certification, including Texas, Florida, New York, Louisiana and Washington DC. Most other states do not have a dedicated mold licence, though general contractor, business or trade licensing can still apply. Rules change, so confirm current requirements with the state agency before you bid work.
Not in most places — certification is a private credential, not a legal requirement. What can be required by law is a state licence, and in licensed states the licence often has its own training and credential prerequisites. Certification and licensing are two separate things, and holding one does not satisfy the other.
Texas regulates mold assessment and remediation through a state licensing program administered by the Texas Department of Licensing and Regulation, with separate credentials for assessment and remediation roles and rules on who may perform each. Licensing rules change — confirm current requirements with the TDLR before performing or bidding mold work in Texas.
Florida licenses mold assessors and mold remediators through the Department of Business and Professional Regulation, and keeps the two roles separate so the same company generally does not assess and remediate the same property. Licensing rules change — confirm current requirements with the Florida DBPR before you take on mold work there.
No. The IICRC certifies remediation technicians and related restoration roles; it does not issue a mold inspector or mold assessor licence. Assessment-side credentials come from independent bodies such as ACAC, NORMI and IAC2, and in licensed states from the state itself. If you want to inspect and write protocols, that is a different credential path.
ACAC is the American Council for Accredited Certification, an independent body offering credentials for indoor environmental professionals — including assessment and consulting roles the IICRC does not cover. Its mold credentials, such as CMR and CMRS, have their own eligibility requirements published by ACAC. Some state programs recognize third-party credentials, so check with the state agency.
In licensed states, yes. AMRT is a certification issued by a private body; a licence is permission from a state agency to sell and perform the work. Texas, Florida, New York, Louisiana and Washington DC among others regulate mold work directly, so check your state before bidding.
The S520 is the consensus standard for professional mold remediation and the document the AMRT exam is written from. It sets out the Conditions 1/2/3 framework, the principles of remediation, containment and engineering controls, worker protection and verification. Our S520 page explains the concepts; for the complete text you buy the standard from the IICRC.
Condition 3 is an area with actual, active mold growth plus the spores and fragments that come with it. It drives the heaviest engineering controls on a job: full containment, negative pressure, HEPA filtration, upgraded PPE and removal of affected porous materials. Condition 2 areas nearby are cleaned, and the goal everywhere is a return to Condition 1.
Condition 1 is normal fungal ecology — levels typical of a comparable clean indoor space. Condition 2 is an area contaminated with settled spores or fragments that migrated from a Condition 3 area. Condition 3 is actual visible mold growth. The condition drives your containment, your PPE and what verification has to prove.
An IEP is an Indoor Environmental Professional — the person who assesses the building, defines the extent of contamination and writes the protocol the remediator works to. Ideally the IEP is independent of the remediation contractor so the clearance decision is not being made by the company that did the work.
Post-remediation verification, or PRV, is the process of confirming the work succeeded before you demobilize: a visual inspection for growth, dust and debris, confirmation that materials are dry, and any sampling the protocol requires. It is best performed by someone independent of the contractor, and passing it is what closes out the project.
At minimum, respiratory protection, disposable coveralls, gloves and eye protection, scaled up as the Condition and the work get heavier. Respirator selection ranges from filtering facepieces for limited work to half-face, full-face or powered respirators with particulate filters. Any tight-fitting respirator requires medical clearance, fit testing and a written respiratory protection program.
Negative air means keeping the pressure inside containment lower than the surrounding space so air flows into the work area and leaves only through HEPA filtration. It is created with an air filtration device exhausted outside the containment, and verified with a manometer rather than by watching the poly. It is the main control protecting the rest of the building.
Remediation is the controlled process of removing contamination, cleaning affected surfaces and correcting the moisture source so the space returns to normal fungal ecology. Mold removal is a marketing phrase that implies eliminating all mold, which is not achievable — spores are present in every building. If a proposal promises removal with no moisture correction, that is a red flag.
There is no universal number, because normal levels depend on the building, the season and the outdoor air. What matters is whether growth is present indoors and whether levels differ from a comparable clean space. Visible growth, a persistent musty odour or a known moisture source are the practical triggers for action, not a spore count on its own.
Free S520 field tools: an ACH and air scrubber sizing calculator, a mold remediation cost calculator, containment volume and PPE selection tools, plus a printable remediation checklist and scope of work template. They are mobile-friendly and built to be used on site rather than at a desk.
Sometimes, and it depends entirely on the policy and the cause of the water. Coverage generally turns on whether the water event itself was sudden and accidental versus long-term seepage or maintenance neglect, and many policies contain specific mold limits or exclusions. Read the policy and ask the carrier directly — no contractor can tell you what your policy covers.
It depends on the factors that drive the scope: how much area is affected, whether materials are porous, whether the moisture source is still active, how much drying is needed, whether contents have to be handled, and whether independent verification is required before rebuild. A single bathroom wall and a whole finished basement are different projects, so ask a contractor to break the timeline down by phase.
When the affected area is large, when the water was contaminated, when growth is hidden inside assemblies or the HVAC system, when occupants are sensitive, or when your state requires a licensed remediator. EPA guidance suggests professional help for larger areas; a professional is also the right call when you cannot find or fix the moisture source yourself.
No. AMRTTraining.com is an independent exam-preparation platform. We are not affiliated with, endorsed by, or operated by the IICRC, and we do not issue any certifications. You still register for and sit the exam through an IICRC-approved school.
Email support@amrttraining.com with the page and what looks wrong. We are working restoration professionals and we would rather fix a definition or a practice question than leave it wrong for the next technician. Corrections to exam-relevant content get priority, and we credit the standard or agency source when we make the change.
30 free scenario-based S520 questions with full explanations — no login, no card. See where you stand before you book the class.
150 S520 and AMRT exam terms defined in plain language.
Read morePrerequisites, class, exam and renewal, start to finish.
Read moreConditions, principles, containment and verification.
Read moreWhich states regulate mold work and who to confirm with.
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AMRTTraining.com is not affiliated with or endorsed by the IICRC and does not issue certifications. Licensing rules change — confirm current requirements with the relevant state agency.