Chapter 04 — The Maine file

Radon testing & mitigation in Maine

Current ME DHHS credentials from the official Maine roster. We group people by the city on that file. We do not invent neighborhoods. Source: ME DHHS.

Latest credential check August 29, 2026. Methodology Individual record dates may be earlier.

121current listings

101testing

33mitigation

Fig. 4 — 95 of 121 current listings are mapped. 18 records have no mappable in-state place. 8 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 Maine

ME DHHS licenses radon work in Maine and publishes a list we import monthly. Match the name and credential number on the official page before you hire.

Official ME DHHS verification page · All fifty states · reviewed September 8, 2026

§ 4.4

Questions about radon credentials in Maine

Does Maine license radon testers and mitigators?

ME DHHS licenses radon work in Maine and publishes a current list with credential numbers. This site imports that list and re-checks it monthly. 121 current Maine listings appear here as of August 29, 2026.

How do I verify a radon credential in Maine?

Open the ME DHHS lookup at https://www.pfr.maine.gov/almsonline/almsquery/welcome.aspx?board=2458, search the name, and match the credential number digit for digit. Status can change between our monthly check on August 29, 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 Maine?

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