Healthy Homes, Part 5: Indoor Air Pollutants and Toxic Materials Course

Welcome to InterNACHI's free, online Healthy Homes, Part 5: Indoor Air Pollutants and Toxic Materials Course. This is part 5 of a 14-part Certified Healthy Homes Inspector certification program. This course is provided by our accredited college at

Take the free online course now.


The goal of this course is to teach students about indoor air pollution, the presence of toxic substances in a house, and how to safely handle and lower exposure to pollutants and toxic materials.  


Upon successful completion of this course, the student will be able to:

  • identify causes and sources of indoor air pollution
  • relate biological pollutants to serious health effects
  • describe types and causes of allergies
  • list causes of mold and health effects of exposure
  • differentiate types of chemical pollutants 
  • identify other types and sources of toxic materials
  • outline a plan to manage and reduce the presence of these pollutants in the home
  • perform an inspection related to code issues
  • generate observations related to healthy housing
  • produce written reports related to observations conducted at a house

Course includes:

  • 32 InterNACHI® CE credit hours;
  • 15,800 words; 
  • 25 quiz questions in 4 quizzes;
  • Inspection and writing assignment; 
  • Research and writing assignment;
  • 20-question final exam; and 
  • Certificate of Completion.  

You will learn the following topics:

  • Health Risks
  • Indoor Air Pollution
  • Biologic Pollutants & Asthma
  • Cockroaches
  • House Dust Mites
  • Pets
  • Mold
  • Allergic Health Effects
  • Toxics and Irritants
  • Causes of Mold
  • Mold Assessment Methods
  • Mold Standards
  • Mold Mitigation
  • Moisture Control
  • Removal of Mold-Contaminated Materials
  • Worker Protection When Conducting Mold Assessments
  • Chemical Pollutants
  • Carbon Monoxide 
  • Ozone
  • Environmental Tobacco Smoke
  • VOCs
  • Formaldehyde
  • Radon
  • Pesticides
  • Toxic Materials
  • Asbestos
  • Lead
  • Controlling Lead Hazards
  • Lead HUD Guidelines
  • Lead Regulations
  • Arsenic
Healthy Homes, Part 5: Indoor Air Pollutants and Toxic Materials Course
Course #4808, Student Catalog 

Student WorkTime CalculationEstimated Clock Hour Time for the Average Student
Attendance for "Seat Time" 1# of minutes of student attendance / 502.0
Participation in Learning Activities 2# of minutes of online student participation / 501.0
Interactivity 3# of minutes of student interactivity / 500.5
Reading the Course Text 4# of words in the course / 100 words per minute / 502.0
Reading the Course Textbook 5# of words in the book / 100 words per minute / 502.0
Academic Engagement 6# of words in the course / 100 / 501.0
Direct Communication 7# of minutes of communication / 500.5
Instructional Video Learning 8# of minutes of video / 500.0
Reinforcement Q & A  9# of questions X 1.85 / 500.8
Writing Assignment of the Inspection  104.0 hours per assignment4.0
Writing Assignment of the Research  114.0 hours per assignment4.0
Academic Activities for an Inspection  128.0 hours for each inspection assignment8.0
Performing an Inspection  138.0 hours for each inspection8.0
Total clock hours
32.0 clock hours
32.0 InterNACHI CE Hours
3.2 CEU

This course has been approved by:

And, in keeping with InterNACHI's commitment to Continuing Education, this online course is open and free to all members, and can be taken again and again, without limit.

Reminder to members: InterNACHI's Code of Ethics 1.10 requires that you comply with all government rules and licensing requirements of the jurisdiction where you conduct business.  InterNACHI's courses and Standards generally exceed the Standards of Practice that you are required to abide by locally.