Becoming Certified in Radon Measurement

Continuous radon measurement devices

Home inspectors can become certified to conduct radon measurement during real estate transactions by completing an approved radon measurement training course and passing a national certification exam from recognized organizations such as the National Radon Proficiency Program (NRPP) or the National Radon Safety Board (NRSB). These certifications are accepted nationwide, with certain states having their own licensing requirements in addition to national certification.[1][2][3][4][5]

National Certification Programs

  • NRPP (National Radon Proficiency Program): Offers Radon Measurement Professional certification, which requires completion of a 16-hour approved initial training course, passing the NRPP exam, and ongoing continuing education.[3][1]
  • NRSB (National Radon Safety Board): Provides certification recognized in many states, with similar requirements—approved training and successful exam completion.[5][3]

Approved Training Providers

  • Professional Home Inspection Institute (PHII): Offers an interactive online course, approved by both NRPP and NRSB, fulfilling the 16-hour training requirement.[3]
  • InterNACHI: Provides a free online NRPP-approved initial radon measurement training course for certified inspectors.[6][7]
  • AHIT (American Home Inspector Training): Delivers a 16-hour Radon Measurement Technician course live (in Wisconsin) and via webinar, also approved by NRPP/NRSB.[8]
  • CERTI: Known for radon measurement training and exam prep, especially in Colorado due to state licensing regulations.[4]
  • ATI Home Inspector Training: Offers online entry-level training with exam prep and business resources.[9]

State Licensing Requirements

  • Most states accept NRPP or NRSB certification for radon measurement, but some—such as Colorado—mandate licensing through the state agency (Colorado Department of Regulatory Agencies) in addition to national certification.[10][4]
  • Inspectors should always confirm specific state requirements with the local radon office before beginning business.[2]

Certification Process Overview

  1. Complete a 16-hour NRPP or NRSB-approved radon measurement training course.
  2. Pass the associated national certification exam (NRPP or NRSB).
  3. Register and calibrate approved testing devices as needed.[1]
  4. Maintain certification through continuing education (typically 12 hours biennially).[1]
  5. Obtain state licensing when required (e.g., Colorado).[4]

Useful Resources

  • : info

  • National Radon Safety Board (NRSB): org
  • Professional Home Inspection Institute (PHII): com
  • InterNACHI: org
  • CERTI: us
  • ATI Home Inspector Training: com

Inspectors are advised to check their state’s radon office or regulatory agency for the most current licensing details and approved course providers.[2][4]

  1. https://nrpp.info/certification/types-of-certification/
  2. https://www.ahit.com/home-inspection-career-guide/how-to-become-a-certified-radon-inspector/
  3. http://www.radontraining.com
  4. https://certi.us/radon-training-colorado/
  5. https://nrsb.org
  6. https://www.nachi.org/certified-radon-gas-measurement-inspector.htm
  7. https://www.nachi.org/radon-measurement-professional-training-course.htm
  8. https://www.ahit.com/radon-measurement-certification/
  9. https://www.atihomeinspectortraining.com/Courses/Radon
  10. https://www.cbhi.biz/radon-measurement-services
  11. https://dpo.colorado.gov/RadonProfessionals
  12. https://icaschool.com/state-licensing/colorado/
  13. https://www.aims.edu/programs/professional-home-inspector
  14. https://nrpp.info/education-training/initial-training-courses/
  15. https://axiuminspections.com/education/
  16. https://axiuminspections.com
  17. https://icaschool.com/radon-inspection-course/
  18. https://www.thitcenter.com/thitcRadonEducation.html
  19. https://inspection.academy/product/radon-101/
  20. https://cdphe.colorado.gov/hm/testing-your-home-radon