NRPP vs NRSB radon certification: which one do you need?
Both are national radon certification programs for measurement professionals in the US. The requirements are similar in shape but differ in cycle length, CE hours and fees — and your state or employer may accept only one of them. Here they are side by side.
| NRPP | NRSB | |
|---|---|---|
| Credential | NRPP Radon Measurement Professional Certification | NRSB Radon Measurement Specialist (RMS) |
| Renewal cycle | 2 years | 1 or 2 years (term you purchase) |
| Continuing education | 12 hours per cycle (must include a 4-hour Standards Overview course) | 8 CE credits per renewal year (technician category: 4/year) |
| Renewal fee | Set by NRPP — see the current fee schedule | $125 for 1 year or $200 for 2 years (same structure for mitigation specialists) |
| Watch out | Some states license radon professionals independently on top of certification | Renew on the term purchased — a 2-year term still needs CE every year |
How to choose
- Check acceptance first. State radon licensing programs and employers typically list which credentials they accept — that decision usually makes itself.
- Cycle math differs. NRPP renews every 2 years with all CE in one cycle; NRSB renews on the term you buy but expects CE credits every single year.
- Moving between them is not automatic. If you hold one and need the other, expect to apply fresh rather than renew across programs.
Renewal walkthroughs
We maintain step-by-step renewal guides for both programs: NRPP radon certification renewal and NRSB radon certification renewal. Always verify current rules with the issuing agency — requirements change.
Paraphrased summaries — not legal advice. Sources: NRPP (nrpp.info) and NRSB (nrsb.org) official material, reviewed 2026-10.
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