Chapter 04 — The Iowa file

Radon testing & mitigation in Iowa

Current IA HHS credentials from the official Iowa roster. We group people by the city on that file. We do not invent neighborhoods. Source: IA HHS.

Latest credential check October 13, 2026. Methodology Individual record dates may be earlier.

302current listings

194testing

108mitigation

Fig. 4 — 244 of 302 current listings are mapped. 56 records have no mappable in-state place. 2 records have an in-state place but no verified city or county coordinate. 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 Iowa

IA HHS certifies radon work in Iowa and publishes a list we import monthly. Match the name and credential number on the official page before you hire.

Official IA HHS verification page · All fifty states · reviewed September 8, 2026

§ 4.4

Questions about radon credentials in Iowa

Does Iowa license radon testers and mitigators?

IA HHS certifies radon work in Iowa and publishes a current list with credential numbers. This site imports that list and re-checks it monthly. 302 current Iowa listings appear here as of October 13, 2026.

How do I verify a radon credential in Iowa?

Open the IA HHS lookup at https://hhs.iowa.gov/health-prevention/providers-professionals/radiological-health/radon, search the name, and match the credential number digit for digit. Status can change between our monthly check on October 13, 2026 and the day you hire. If the official page disagrees with this directory, the official page is right.

Is an NRPP or NRSB certification enough in Iowa?

Iowa issues its own radon credential through IA HHS, so a national NRPP or NRSB certification is not a substitute for it. Every Iowa listing on this site shows the IA HHS number, not a national one.