What does it cost and how can I register?



Who should get the CMI certification?

Are you looking to get certified to do mold inspections? The most reputable mold certifications in the marketplace come from the American Council of Accredited Certification (ACAC). Join Indoor Sciences to prepare for their Council- certified Microbial Investigator (CMI) designation.

The CMI certification will demonstrate to your clients that you:

  • Understand when, where and why mold and bacteria will grow
  • Recognize the effects that mold and bacteria may have on health
  • Assess indoor environments in a comprehensive manner, rather than just collect samples
  • Comprehend how to diagnose microbial problems and write plans for them to be resolved
  • Apply an industry standards of care to your work

What are the prerequisites for getting CMI certified?

Although you will receive a certificate of completion for attending the course, you will need to pass an examination and meet other prerequisites to obtain the Council- certified Microbial Investigator certification.


CMI applicants must possess one of the following combinations of two (2) years education and relevant field experience:

  • No degree, with at least two (2) years of consulting experience in microbial sampling. (High school diploma or GED required.)
  • A 2-year post-secondary degree or its equivalent (15 credit hours) in microbiology, engineering, science, architecture, industrial hygiene or related field of science with at least one (1) year documented experience in microbial sampling.

If you are new to the field and don’t meet these experience requirements, consider taking the CRIE: Council- Certified Residential Indoor Environmentalist.  If your experience vastly exceeds the amounts above, you should consider the CMC- Council- certified Microbial Consultant.

After registering for our course, you’ll want to download the ACAC’s CMI Application Form.


Where is the course offered?

The class is both offered online as a self-paced class AND as an on-site class that we periodically teach in cities throughout the U.S.


The online class is approximately 24 hours of material to cover online.  You will log into our website and watch a powerpoint presentation.  The audio of the instruction is sychronized with bullet points, pictures and pop quizes.  You’ll need a computer with speakers or a separate headset to view the class.  You have 90 days to complete the course, but extensions are available for purchase for a small fee if you need more time.  Upon completion, you indefinitely keep the course manual for future reference.

The face-to-face on-site class is condensed into two days for a fast paced class to get you prepared for the CMI.  Depending on the dates and location, we may combine classes with students preparing for the CIE.  The following are upcoming course dates:

  • November 14-15, 2018 in San Francisco
    • 6000 Shoreline Ct South San Francisco, CA 94080
  • February 12-13, 2019 in Orlando
    • Courtyard by Marriott Maitland, 1750 Pembrook Drive, Orlando, FL 32810
  • May 14-15, 2019 in Chicago
    • Hampton Inn Naperville, 1087 E Diehl Rd, Naperville, IL 60563
  • September 10-11, 2019 in Richmond
    • 1551 Oakbridge Dr. Suite B Powhatan, Va 23139
  • November 6-7, 2019 in Irvine, CA
    • 17461 Derian Ave #100, Irvine, CA 92614
  • (also available as an online course!)


Our course is approved by the Indoor Air Quality Association (IAQA).  Although your course completion certificate is issued by the IAQA, the actual certification is issued by ACAC.

How can I register?

Want to take the class online? Click on CMI Online Registration to register, or just give us a call at (312) 920-9393.  The cost is $795 with discounts available to IAQA members.


Or want to take the class face-to-face, on-site?  Click on CMI On-site Registration to register, or give us a call at (312) 920-9393.  The cost is $795 with discounts available to IAQA members.


Both the online and on-site classes above include the CMI practice exam.  If you would like to only take our CMI practice exam without doing the whole course, the cost is $199. Click on CMI Practice Exam to register.   Please note that the practice exam does not explain why the correct answers are correct and the wrong answers are wrong.


How is the CMI different from the CMC?

The CMI and the Council- certified Microbial Consultant (CMC) examinations are very similar.  We have a single class that equally prepares students for both of these designations.  We have had great success in preparing students for both the CMI and CMC using the same class.  Don’t worry about our classes helping you pass the exams.  We guarantee your success!


How do I get certified?

After finishing our class, you’ll be prepared to take the ACAC certification exam for CMI.  The exam itself is offered at computerized testing centers.  You can find a proctored testing location by clicking this link: Testing Locations

Exam details:

  • 100 multiple choice questions
  • Passing grade: 75%
  • You have 3 hours to complete the exam
  • Exam is closed-book


Do you have a cancellation and refund policy?

Yes! To learn more, visit our Cancellation and Refund Policy.


What does the course cover?

Because there are several disciplines covered on the Certified Microbial Investigator, our course is designed to be comprehensive.  The following is a breakdown of all the topics covered in the course:



  • Introductions
  • Course Schedule
  • Exam Information
  • Reference Documents
  • Summary of all Course Modules


  • Taxonomy
  • Major Categories
  • Fungi
  • Mold
  • Reproduction
  • Growth Requirements
  • Growth Cycle
  • Mycotoxins
  • Microbial Volatile Organic Compounds (mVOCs)
  • Fungal Glucans
  • Bacteria
  • Requirements for Growth
  • Water Activity
  • Endospores
  • Gram Staining
  • Endotoxins
  • Sources of Bacteria
  • Viruses
  • Infection and Replication
  • Indoor Conditions and Viruses
  • Diseases Caused by Viruses


  • Human Organ Systems
  • Categories
  • At Risk Populations
  • Dose Response
  • Routes of Exposure
  • Aerosols, Bioaerosols and Droplet Nuclei
  • Building Related Symptoms
  • Studies
  • Risk Factors
  • Physical and Psychological Stressors
  • Building Related Illness
  • Airborne Infectious Diseases
  • Disease Transmission
  • Legionnaires Disease
  • Pontiac Fever
  • Mycoses
  • Anthrax
  • Tuberculosis
  • Influenza
  • Immunization
  • Common Cold
  • Strep Throat
  • Nosocomial Infections
  • Pneumonia
  • Hypersensitivity Diseases
  • Stages of an Allergic Reaction
  • Identifying an Allergic Reaction
  • Prevalence of Allergies
  • Allergic Rhinitis
  • Asthma
  • Hypersensitivity Pneumonitis
  • Toxic Reactions
  • Mycotoxins
  • mVOCs
  • Fungal Glucans
  • Endotoxins


  • Psychrometrics
  • Humidity
  • Dew Point
  • Psychrometric Chart Example Problems
  • Sources of Building Moisture
  • Liquid Water Intrusion
  • Vapor Diffusion
  • Designs in Different Climate Zones
  • Air Infiltration
  • Blower Door Tests
  • HVAC
  • Equipment sizing
  • Occupant Generated Humidity
  • Pipe Leaks and Spills
  • Preventing Mold During Construction


  • Assessments and Logical Reasoning
  • Scientific Method
  • Assessment Plan
  • Step 1: Gather Information
  • Step 2: Walk Through Inspection
  • Step 3: Indicator Measurements
  • Step 4: Diagnostic Measurements
  • Step 5: Report Your Findings


  • Why Perform Sampling
  • Mold Sampling
  • Air Sampling
  • Viable vs Non ViableSpores
  • Sampling Methods
  • Devices
  • Equipment
  • Agar Media
  • Sampling Procedures
  • Sampling Times
  • Laboratory Analysis
  • Detection Limits
  • Spore Traps
  • Pump Calibration
  • Variability
  • Sample Locations
  • Interpreting Results
  • Report Examples
  • Surface Sampling
  • Tape Lift
  • Swab
  • Bulk Sampling
  • Dust Sampling
  • PCR Analysis
  • mVOCs
  • Mycotoxins
  • Bacteria Sampling
  • Airborne Sampling
  • Devices
  • Methods
  • Limitations
  • Interpretation
  • Water Sampling
  • Swab Sampling
  • Endotoxins
  • Laboratories
  • Chain of Custody


  • Definition of Remediation
  • Review of Standards
  • Safety and Health
  • Personal Protective Equipment
  • Contaminant Control
  • Containment
  • Negative Pressure
  • Contaminant Removal
  • Clean vs Replace
  • HVAC Systems
  • Biocides
  • Disposal
  • Verifying Remediation
  • Writing Specifications
  • Choosing a Contractor
  • IICRC S520
  • IICRC S500
  • NYC Guidelines
  • EPA Guidelines


To sign up, call us at (312) 920-9393 or click on one of these links: CMI Online, CMI On-site.


It is your responsibility to notify us in writing if you would like us to report your continuing education directly to a state licensing agency (e.g. FL Dept. of Professional Regulation) or professional organization.