National Exams

National Radon Proficiency Program (NRPP) examinations are offered either during or after each course. These exams are challenging, and the successful completion of a MURC course will significantly improve your ability to pass the examination. 

To be listed or licensed by states, you need to pass a national proficiency exam. NRPP is administered by the American Association of Radon Scientists and Technologists (AARST). Check with the states in which you wish to do business to see whether there are additional requirements.

If you are seeking advanced NRPP certification in multifamily or school and large building measurement or mitigation, you need to be NRPP certified in measurement or mitigation. NRPP does not view state licensing as a substitute for NRPP certification.

What to Bring to the Exam

You are only allowed to bring the following items when taking the exam: #2 pencils and erasers, a small hand-held pencil sharpener, and a simple calculator. You are not allowed to bring any other materials into the exam room, including books, notes, or cell phones.

*If you are registering for an exam only, not a class, please register by e-mailing: or telephone 800-843-8636.

NRPP Exam Scores

View your NRPP exam scores online.