Top-rated radon gas testers.

Get matched with top radon gas testers in Columbia, MO

Enter your zip and get matched with up to 3 pros

Matching on HomeAdvisor

Share some details icon
Share some details about your home project.
Match with local pros icon
Within moments, match with highly-rated local pros.
Compare quotes icon
Compare quotes and choose the best pro for the job.

Find Radon gas testers in Columbia

Avatar for Environmental Testing & Research Laboratories, Inc
Environmental Testing & Research Laboratories, Inc
4.8(
347
)

Serving Columbia, MO and surrounding areas

In business since 1995

Free estimates

Warranties offered

"<p>it was superb! they easiest, hassle free Radon test in town, with extremely proficient people -- very knowledgeable and very people-friendly! they took their time to explain things on the phone to me before I committed. the test came back within 10 days or so -- via email. which is very convenient. it was very clear as it is, but I like talking through it and get advice. they were instantly available to discuss. they gave me future tips to keep on top of all things Radon related. </p> <p>I have to say that all this comes to be after 3 months of many back and forths with 3 other companies -- none of the other companies could be bothered to schedule a time, and those who did, never showed up.. many times over. I don't know why I was so patient with them and I wish had discovered Environmental Testing & Research Laboratories much sooner.</p> <p>Really highly recommend them!</p> <br />"
Recommended by93%of homeowners
Avatar for Pure Air Of The Ozarks
Pure Air Of The Ozarks
4.9(
7
)

Serving Columbia, MO and surrounding areas

Free estimates

Warranties offered

"They came out quickly and gave us an estimate to remediate mold in our crawlspace. Within a few days they returned to spray and fog under our house. They were very thorough and did testing to make sure that our problem was remedied. Their technician, Lane, was professional and great to work with!"
Recommended by100%of homeowners
Avatar for Show Me Home & Building Inspections
Show Me Home & Building Inspections
5.0(
2
)

Serving Columbia, MO and surrounding areas

In business since 2019

Free estimates

Warranties offered

"Milton was very professional and responsive during the testing process. He helped us understand what radon gas is and what the risks are associated with it. He was very quick and efficient as well. I would highly recommend him."
Recommended by100%of homeowners
Avatar for Pangborn Home Inspections LLC
Pangborn Home Inspections LLC
5.0(
1
)

Serving Columbia, MO and surrounding areas

In business since 2003

Free estimates

Warranties offered

"Joe Pangborn arrived promptly and was ready to start immediately. He was very professional, thorough, and above all else extremely helpful. He made my home and radon inspections a breeze."
Recommended by100%of homeowners
RLM & Associates, LLC
New to Angi

Serving Columbia, MO and surrounding areas

In business since 1994

Free estimates

Warranties offered

At RLM & Associates, LLC we are committed to providing the highest level of Residential Engineering and Home Inspection services available, at competitive rates. Our loyalty is exclusively to you—our client. Whether you are building a new home or buying a re-sale property for your family or as an investment, we have the training, experience, and skills to provide you with extremely powerful information to make a confident, knowledgeable decision. By law, only licensed engineers are permitted to give opinions on corrections for structural issues. Put some real muscle into your real estate negotiations by getting a report from RLM & Associates, LLC. Whether it's your first home or you're an experienced buyer, we can help you avoid real headaches and give you peace of mind knowing that you've made a smart choice!

Avatar for Just Inspections LLC
Just Inspections LLC
New to Angi

Serving Columbia, MO and surrounding areas

Free estimates

Warranties offered

Just Inspections LLC offers certified residential home inspections to help potential home buyers in Mid Missouri make smarter and more informed decisions. ASHI certified inspector, Justin Smith, strives to offer the best possible home inspection, service, and value. Whether you are a first time home buyer or have purchased several homes, Just Inspections will provide you with peace of mind before making such a large investment.

Avatar for Spartan Home Inspections LLC
Spartan Home Inspections LLC
New to Angi

Serving Columbia, MO and surrounding areas

Free estimates

Warranties offered

Locally family owned Company in Columbia, Missouri. We service all of Mid-Missouri. We offer home inspections, radon inspections, and Termite inspections. \n\nWe treat everyone like family and treat every inspection as if we were buying the house personally.

Showing 1-10 of 12
FAQs for radon gas testing projects in Columbia, MO

Radon is the second leading cause of lung cancer in the U.S. The gas seeps through cracks in foundations and collects in basements and other low areas. Once you breathe it in, radioactive particles lodge in lung tissue and do long-term damage. Because you can’t see or smell radon, the EPA recommends testing your home every two years—and after major renovations—to keep your family safe.

Yes—every home should be tested. The EPA advises doing it at least every two years and any time you remodel, buy, or sell. On average, one in 15 houses nationwide sits above the recommended limit, and the only way to know where yours stands is a formal test. The equipment simply measures gas levels and won’t change your indoor environment, so the process is completely harmless.

Certified radon professionals—often home inspectors or dedicated radon mitigation contractors—handle testing. These radon testing professionals follow EPA protocols and use calibrated instruments to check levels throughout your house. Hiring a certified radon specialist means results you can trust for real estate deals, insurance requirements, and, most importantly, your family’s health.

Inspectors specialize in measuring radon gas levels, while licensed mitigation contractors design and install the systems that remove it. If your test comes back high, your inspector can point you to a qualified mitigation pro who will size and install the right fan, piping, or other equipment to bring levels down.

No—standard home air purifiers don’t touch radon. They’re built to trap dust and pollen, not radioactive gas. If testing shows high levels, you’ll need a dedicated mitigation system that vents the gas from beneath your home to the outdoors. Relying on a room purifier alone won’t keep your indoor air safe.

Opening a few windows in your home might dilute radon for a short time, but the gas seeps back in as soon as they’re closed. For a lasting fix, you’ll need a professional mitigation system—often a sub-slab depressurization fan—that pulls radon from beneath the foundation and safely vents it outside.

The Columbia, MO homeowners’ guide to radon gas testings

From average costs to expert advice, get all the answers you need to get your job done.