Radon Testing CompaniesMissouri file — NRPP / NRSB
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Chapter 04 — The Missouri file

Radon testing & mitigation in Missouri

This site imports no Missouri state roster, so these are current NRPP and NRSB certifications from those programs’ public finders. A national certification is not a state license. We group people by the city on that file. We do not invent neighborhoods. Source: NRPP.

Latest credential check September 14, 2026. Methodology Individual record dates may be earlier.

69current listings
54testing
15mitigation
Fig. 4 — 69 of 69 current listings are mapped. Each pin is a current listing at the Census city or county centroid on the file, approximate. Pins that share a place are spread so you can click them. Not street addresses.

§ 4.1

Cities with listings

A city appears only when at least one current listing serves it.

§ 4.3

How to verify a radon credential in Missouri

We have not confirmed whether Missouri requires a state radon credential. Treat this as unknown, not as "none required", and ask the Missouri radon program. Listings here are current NRPP or NRSB certifications, which are national and are not a state license.

NRPP finder · NRSB finder · EPA guidance · All fifty states · reviewed September 8, 2026

§ 4.4

Questions about radon credentials in Missouri

Does Missouri license radon testers and mitigators?

We have not confirmed whether Missouri requires a state radon credential. That means unknown, not that none is required. We do not guess at state law, so this site publishes no answer it has not checked. Ask the Missouri radon program.

How do I verify a radon credential in Missouri?

The 69 listings shown here are current NRPP or NRSB certifications, verifiable on those programs' public finders. The latest record check was September 14, 2026; check each listing for its own date. If Missouri also requires a state credential, ask the provider for it and check it with the state agency.

Is an NRPP or NRSB certification enough in Missouri?

We cannot say for Missouri, because we have not confirmed whether the state requires its own credential. A national certification is never a state license anywhere. Treat NRPP or NRSB as evidence of training, then ask the state radon program what else is required.