Top-rated radon gas testers.

Get matched with top radon gas testers in Chesterfield, 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 Chesterfield

Avatar for ATM Home Inspection, LLC
ATM Home Inspection, LLC
4.8(
40
)

Serving Chesterfield, MO and surrounding areas

Approved

In business since 2011

Free estimates

Credit card accepted

"Time will tell but seemed knowledgeable, they were very informative for us during the inspection and before and their report is well laid out with all that they reviewed including relevant pictures (with arrows, circles on important parts)."
Response time50 mins
Response rate88%
1 neighbors recently requested a quote
Avatar for EnviroTech Radon Solutions
EnviroTech Radon Solutions
4.4(
7
)

Serving Chesterfield, MO and surrounding areas

In business since 2018

"Envirotech is a professional, knowledgeable & competent company. . The owner is very accessible & explained all of the radon options for midigation throughly. High quality work was completed in a timely fashion. I would highly recommend this company for your radon testing & midigation needs."
Exterior Fan Location
Exterior Fan Location
Roof Exhaust Radon System
Interior Garage Routing
Fan located in attic and exhausted through roof

+40

Response time1 day
Recommended by100%of homeowners
Avatar for Scope Environmental
Scope Environmental
5.0(
15
)

Serving Chesterfield, MO and surrounding areas

In business since 2023

Free estimates

Small jobs welcome

"I used Scope Environmental recently to test floor tile and the underlying mastic to determine if either contained asbestos. I selected Scope because Jeff was very responsive, professional, independent of the abatement companies and his price was competitive. Jeff suggested testing both the tiles and mastic. The tiles tested positive for asbestos but the mastic contained no asbestos. As a result, I saved considerable expense by abating the tiles only and not the mastic so I also used Scope again for the post abatement air testing rather than the abatement company. I would hire Scope again for material and air testing for asbestos, mold or any other potentially toxic materials."
Black mold inside closet
Mold growth in HVAC Closet
Asbestos Flooring
Floor sample collection
Asbestos Adhesive

+10

Response time4 hrs
Response rate96%
Recommended by73%of homeowners
Avatar for Proper Environmental
Proper Environmental
5.0(
6
)

Serving Chesterfield, MO and surrounding areas

Free estimates

Credit card accepted

"It went great! They set up a system in my parent's house and they mitigated the radon down to a save level. They did a test before and after, and I was satisfied with the results. Proper Environmental did a thorough job and would recommend this company to anyone!"
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+3

Recommended by100%of homeowners
Avatar for Greensmith Home Inspection, LLC
Greensmith Home Inspection, LLC
4.6(
36
)

Serving Chesterfield, MO and surrounding areas

In business since 2017

Free estimates

Credit card accepted

"I live in Iowa purchasing a home in St. Louis Mo Wow my expectations were exceeded extreme proficiency, I truly felt like I was right beside them with the report and pictures, nothing was left untouched. Thank you so much now I feel secure moving forward in my home purchase"
Appliance Serial Number Capture
Response time2 hrs
Recommended by93%of homeowners
Avatar for D and S Home Inspections
D and S Home Inspections
5.0(
9
)

Serving Chesterfield, MO and surrounding areas

In business since 2017

Free estimates

Credit card accepted

"Worked with Scott on 2 separate home buying searches and he has been nothing but honest, thorough, genuine and professional! He make too while experience comfortable for me and educated me throughout both inspection and those that he worked with that did my sewer lateral were also honest, thorough, genuine and professional ??! I've already recommended him and will continue to do so!!"
No so handy handy man repair
ASHI
InterNACHI BUY BACK
Response time2 hrs
Recommended by100%of homeowners
Certified Safety Consulting, LLC
5.0(
4
)

Serving Chesterfield, MO and surrounding areas

In business since 2008

Free estimates

Credit card accepted

With over 33 years of experience as a Safety Consultant, Certified Safety Consulting, LLC is who you need to take care of your home. We handle everything from the initial consultation to making sure your property looks perfect every single time. We will always treat your property as we would treat our own, and you will be surprised how simple and easy our team will make the whole process seem. Give our team a call today. We're looking forward to working with you!

Response time12 hrs
Recommended by100%of homeowners
Avatar for American Patriot Home Inspection, LLC
American Patriot Home Inspection, LLC
5.0(
2
)

Serving Chesterfield, MO and surrounding areas

In business since 2019

Free estimates

Credit card accepted

American Patriot Home Inspection, LLC is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade is what makes us true professionals. As your home inspector it is my duty, and my privilege, to provide you with the best service possible and to arm you with the information you need about the condition of the property. In addition, I have contributed 31 years of military service and will provide the same level of dedication to every home inspection.

Response time5 hrs
Recommended by100%of homeowners
Showing 1-10 of 21
FAQs for radon gas testing projects in Chesterfield, 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 Chesterfield, MO homeowners’ guide to radon gas testings

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