Finding a Certified Radon Professional in Michigan: What to Look For

Hiring someone to test or mitigate radon in your home is a health decision as much as a home services decision. The person you choose determines not just whether a system gets installed but whether it gets installed correctly — whether the diagnostic work that precedes installation is thorough, whether the fan is appropriately sized, whether the suction point placement achieves the pressure field coverage your home requires, and whether the post-installation test confirms real performance rather than assumed performance. In a state like Michigan, where radon certification is voluntary rather than legally mandated, the range of who holds themselves out as a radon professional is wider than it should be. Knowing what to look for separates qualified professionals from less credentialed operators in a market that does not do that sorting automatically.

Why Michigan's Voluntary Certification Landscape Matters

Several of the states we have discussed in earlier posts on radon legislation — Ohio, Indiana, Minnesota, Illinois — have mandatory licensing requirements for radon professionals. A person performing radon testing or mitigation in those states without the required license is operating illegally, which creates a floor of accountability that the market cannot fall below.

Michigan has no such requirement. Anyone in Michigan can advertise radon testing or mitigation services without holding any certification, completing any training, or demonstrating any competency in the field. This is not a criticism of Michigan's radon professionals broadly — many excellent, highly qualified practitioners operate in this state. It is a description of the regulatory environment that means the responsibility for distinguishing qualified from unqualified providers falls entirely on the homeowner rather than on a licensing body.

Understanding what legitimate certification looks like — and what questions to ask to verify it — is therefore not a bureaucratic formality. It is the primary quality assurance mechanism available to Michigan homeowners choosing a radon professional.

The National Certification Bodies

Two national organizations provide the credentialing framework that most legitimate radon professionals in Michigan operate within.

AARST-NRPP — the American Association of Radon Scientists and Technologists National Radon Proficiency Program — is the most widely recognized certification body in the radon industry. NRPP certifications are granted separately for radon measurement professionals and radon mitigation professionals, reflecting the fact that testing and mitigation are distinct skill sets that warrant separate credentialing.

Certification requires completion of an approved training course, passage of a written examination, demonstration of practical skills, and ongoing continuing education to maintain certification.

NRSB — the National Radon Safety Board — is the second major certification organization and operates a comparable credentialing framework. NRSB certified professionals have completed similar training, examination, and continuing education requirements. Both NRPP and NRSB certifications are recognized by the EPA as meeting the standards for professional radon services.

When evaluating a radon professional in Michigan, asking specifically whether they hold current NRPP or NRSB certification — and which credential, measurement or mitigation — is the foundational verification step. Both organizations maintain online directories of currently certified professionals that allow homeowners to verify certification status independently rather than relying solely on the contractor's self-representation.

Measurement vs. Mitigation Certification

The distinction between measurement certification and mitigation certification is worth understanding because the two credentialing pathways address different competencies.

A certified radon measurement professional has demonstrated competency in test device selection, placement protocols, chain of custody procedures, and result interpretation. As we covered in our post on what happens during a professional radon test and our post on test placement, these are specific technical skills that directly affect the accuracy and reliability of a test result. A measurement professional who is not also a mitigation professional can conduct testing but should not be designing or installing mitigation systems.

A certified radon mitigation professional has demonstrated competency in system design, diagnostic assessment, fan selection, installation technique, and post-installation verification. These are the skills that determine whether an installed system actually achieves the radon reduction it is designed to deliver. A mitigation professional who is not also a measurement professional may partner with a separate testing professional or may hold both credentials.

Companies like All Michigan Mitigation that provide both testing and mitigation services should hold both types of credentials — measurement certification for the testing side and mitigation certification for the installation side. Asking to see both when evaluating a full-service radon company is a reasonable and appropriate question.

What to Ask When Evaluating a Radon Professional

Beyond verifying certification, a set of specific questions helps distinguish thorough, quality-focused professionals from those who cut corners in ways that affect outcomes without being immediately visible.

What diagnostic work do you do before designing a mitigation system? A professional who jumps directly to system installation without conducting a communication test — the diagnostic step that determines how suction distributes through the sub-slab space — is skipping the assessment that informs every critical design decision. As we covered in detail in our post on sub-slab depressurization, the suction point location, the number of suction points required, and the fan selection all flow from diagnostic findings. A contractor who does not mention diagnostics in response to this question is signaling a less rigorous approach.

What fan do you use and why? A professional who can speak specifically to fan selection — brand, model, capacity, why that fan is appropriate for your home's specific conditions — is demonstrating engagement with the technical side of the installation rather than treating the fan as an interchangeable commodity. Quality fans from established manufacturers like RadonAway or Festa Radon Technologies have documented performance characteristics and service records. A contractor who cannot or will not specify the fan they intend to install warrants further investigation.

What does post-installation testing look like? A professional who does not include or strongly recommend a post-installation test as part of the service is leaving the most important verification step out of the process. As we discussed in our post on what to expect after installation, the post-installation test is the only way to confirm that the system is achieving the radon reduction it was designed to deliver. A contractor who installs without verifying is leaving the homeowner to assume success rather than confirming it.

What happens if the system does not achieve the target result? A confident, quality-focused contractor will have a clear answer to this question — they will reassess the system, identify what adjustment is needed, make the correction, and retest. A contractor who hedges, deflects, or makes vague commitments in response to this question is signaling less than full confidence in their work.

Red Flags to Watch For

Several specific patterns in contractor behavior warrant caution and closer scrutiny.

Very low pricing that significantly undercuts other quotes is worth examining carefully.

As we discussed in our post on mitigation costs, there is a range of legitimate pricing that reflects the real cost of quality materials, appropriate diagnostic work, and certified labor. Pricing that falls significantly below that range may reflect cheaper fan selection, skipped diagnostic steps, or labor that is not certified. The cost difference between a quality installation and a cut-rate one may be a few hundred dollars. The performance difference can be significant and long-lasting.

No mention of post-installation testing in the service description is a red flag. A legitimate mitigation professional understands that the post-installation test is the proof of performance, not an optional add-on. Any contractor who does not proactively include or recommend it is either inexperienced or not oriented toward confirmed outcomes.

Inability or unwillingness to provide certification documentation on request is a clear signal. A certified professional has nothing to hide and every reason to present their credentials clearly. A contractor who becomes evasive when asked for certification documentation is signaling that the documentation may not exist or may not be current.

The Value of Local Knowledge

Beyond credentials and technical competency, local knowledge and experience matter in ways that are relevant to West Michigan homeowners specifically. A radon professional who has worked extensively in Kent, Ottawa, Ionia, Barry, Allegan, and Muskegon counties has encountered the specific foundation types, construction eras, and sub-slab conditions that define homes in this region. That accumulated experience informs better diagnostic judgments and more effective system designs than general competency alone provides.

The Zone 1 geology of much of West Michigan, the prevalence of mid-century basement construction, the characteristics of lakeshore properties in Ottawa and Allegan counties, the older housing stock in smaller communities like Hastings and Portland — these are local specifics that a contractor with regional experience brings to every job, and that translate into more accurately designed systems and better outcomes for homeowners.

Making the Final Decision

After verifying certification, asking the diagnostic and process questions, noting any red flags, and considering local experience, the final decision about which radon professional to hire often comes down to communication quality and professional confidence. A contractor who explains their process clearly, answers questions specifically and directly, and presents their credentials and approach transparently is demonstrating the same professionalism in the sales conversation that they are likely to bring to the work itself.

Radon testing and mitigation is not a category where the lowest bid is the best value. It is a category where the quality of the work directly determines the health protection your family receives — a standard that argues for prioritizing demonstrated competency and transparent process over price alone.

At All Michigan Mitigation, we hold current NRPP certification for both radon measurement and mitigation, conduct thorough diagnostic assessments before every system design, specify quality fans appropriate to each home's conditions, and include post-installation testing as a standard component of our mitigation service. Radon is the only thing we do, and the depth of expertise that specialization produces is what we bring to every home we serve.

Visit us at allmichiganmitigation.com to learn more about our credentials and process or to schedule a test or consultation.

All Michigan Mitigation is a West Michigan radon testing and mitigation company dedicated exclusively to helping homeowners understand and eliminate radon risk in their homes.