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Radon professionals are finding it valuable to become certified in the radon field in order to provide assurance to their clients that they are receiving services that are within standards, ethics and protocols that can be relied on. It has especially become important to have the certification in order to provide services during real estate transactions (which account for approximately 70% of radon testing and mitigation).

The professional recognition you and your business receive from being nationally or state certified is an integral part of the professionalism and excellence we provide in our training programs. We are committed to providing you, your business, and your clients with the assurance that the extra efforts you take in holding a national or state certification means your qualifications are of the highest standards.

At CERTI we provide you with quality training and easy steps to becoming certified and maintaining your certification.

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 Steps for Certification

  1. Successfully complete the appropriate Entry Level Course(s)

  2. Pass the Certification Exam(s).

  3. Download and complete the Certification Application and return to NRPP.


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Step 1 - Entry Level Courses

The first step is to take an approved entry level course.  All of CERTI courses are approved by NRPP for entry level and for Continuing Education.  CERTI courses are convenient online courses allowing you to take the course at your own pace with no limitation on time or access to the course.

Some states have additional regulations and requirements.  See a list of course approvals and regulated states here.

Entry Level - Certification Courses:

Measurement Entry Level Course - This course prepares you to conduct radon measurements and is the only course required to obtain certification in Measurement.  It is also a pre-requisite to taking the mitigation course:


Mitigation Entry Level Course - This course prepares you to install radon mitigation systems to reduce the levels of radon in a building.  The Measurement Course is a pre-requisite to this course.  Please note, that although you are required to take both Measurement and Mitigation courses to become certified in Mitigation, you are not required to obtain both certifications, but your are eligible to do so if you prefer.  Each certification requires its own exam and application.  You can register for both courses at a discounted price:

If you have already completed an approved Measurement Course, you can also register for the Mitigation Course only:


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 Step 2 - Certification Exams

Certification Exams are available in two formats.  For most of the U.S. (if a facility is close to you), the exams are available through a computer-based testing facility - PSI  Testing Centers.  For Canada and areas in the U.S. that are not close to a PSI facility, exams are available directly through NRPP with the services of a Proctor.

Computer-Based Testing Procedure - PSI (U.S.):

These exams are provided through PSI Lasergrade, which is a computer based testing facility.  You will need to find the facility closest to you, then schedule the exam directly through PSI.  

Paper and Pencil Testing Procedure - Canada:

These exams are paper and pencil and require the services of a proctor, which you can select for approval by NRPP.  The proctor would agree to have the exam sent directly to them by NRPP, they would be present while you take the exam, and then they would return the exam back to NRPP.

  • Contact - Call C-NRPP directly to schedule the exam and to arrange for a proctor - 204.798.9649 (CST/CDT)
  • Cost - Contact C-NRPP directly
  • Results - Made available to you through C-NRPP after they receive the exam back and have graded it.

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 Step 3 - Certification Application

Once you have successfully completed the online course and the certification exams, you will need to download the application (see links below) and attach:

  • Copy of Course Certificate - available online after you successfully complete the course
  • Copy of Certification Exam Passing Letter - provided to you by PSI Lasergrade, or through NRPP if you take the exam through a proctor
  • Application Fee

U.S. Application - NRPP

Canada Application - C-NRPP