Short answer
NRSB is the National Radon Safety Board, the other national program in the United States that certifies radon measurement and mitigation professionals.
What NRSB means
NRSB calls its certification formal recognition of professional excellence based on qualifications, high ethical standards, and continuing education in radon services.
It says a certificate holder must follow the standards recognized by the state in which they are conducting business.
NRSB's three exams, minute by question
NRSB lists a course and an exam for each certification. The last column divides the exam's minutes by its questions.
| Certification | Course | Exam | Minutes a question |
|---|---|---|---|
| Radon Measurement Technician | 8 hours | 75 questions in 1.5 hours | 1.2 |
| Radon Measurement Specialist | 16 hours | 100 questions in 2 hours | 1.2 |
| Radon Mitigation Specialist | 16 and 24 hours, or 40 combined | 125 questions in 2.5 hours | 1.2 |
What it means for your home
For a homeowner the two national programs do the same job: either one is a credential you can ask to see.
Where a state licenses radon work, the state's licence is the one that counts there.
Where to go next
- Find a certified radon professional. Search testers and mitigators by state and town.
- Radon certification: the programs and how to get certified.
, NRSB and state licences, side by side.