Top-rated radon gas testers.

Get matched with top radon gas testers in Welcome, MD

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.

Top-Rated Radon gas testers in Welcome - Updated Nov 2026

Avatar for Mid Atlantic
Mid Atlantic
4.9(
18
)
Radon Gas - Testing

Serving Welcome, MD and surrounding areas

In business since 1985

Free estimates

Emergency services offered

"Chris was very professional on the phone and it surprised me that, for such a low price, I was getting as much as I did! MA CARRES is a FHA 203k qualified inspector (though I only hired him as a home inspector) AND a Realtor so I got a little bit of everything when he and his employee came. The fact that they are retired firefighters was a bonus as I had some questions about darkened wood and they let me know where the CO2 detector should really be located for best effect. I definitely will use MA CARRES in the future!!"
Crawl Space
Crawl Space
Crawl Space
Crawl Space
Recommended by100%of homeowners
Avatar for Magnolia Plumbing Heating & Cooling
Magnolia Plumbing Heating & Cooling
3.9(
210
)
Radon Gas - Testing

Serving Welcome, MD and surrounding areas

In business since 1950

Emergency services offered

Credit card accepted

"At 7pm on Saturday the 15th, In the middle of the Presidents` Day holiday, the value on my tenant’s apartment radiator started to leak at the rate of 1/2 c every half hour. My house, and the radiator, is 111 years old. I frantically called two 24 hour emergency plumbers and none of them came through. I then called Magnolia, who I had never used before, and Jose Vilche came to my house 40 minutes later. He had to drain the radiators and shut off the water flow as he could not remove the valve, but about 8:20 the next morning he arrived with his assistant, Angel, to cap that radiator and refill the system. He returned on Tuesday, as I had to work on Monday, with his supervisor who was finally able to remove the valve. The radiator stays capped until Tuesday the next week (accommodating my work schedule) when Vincent and Angel install the new valve. I had them also install a new drain valve on a second apartment radiator. So now, after all the draining and bleeding and testing for water balance, the radiators are functioning better than they ever had before. While Magnolia is not inexpensive, the cost was definately worth my peace of mind. Jose was in constant contact with me, he arrived exactly on schedule, explained each step along the way and worked diligently on my horrible problem until it was resolved. Thank you Magnolia- this was a stressful time for me and I was very satisfied with the service I had received!"
We are there when you Need us the Most
Can Do. Will Do. Well Done~ Guaranteed
Fall Specials
Additional Photos
Magnolia Plumbing, Heating & Cooling

+8

Recommended by72%of homeowners
Avatar for safety first home inspection & decon, inc.
safety first home inspection & decon, inc.
4.2(
5
)
Radon Gas - Testing

Serving Welcome, MD and surrounding areas

In business since 2019

Free estimates

Emergency services offered

"Mr. Thomas Burr and his business partner did an exceptional job removing mold from the floor in my office. They were punctual and very professional. Before the start of the job, the entire process was explain to my Husband and I which put us at ease. Upon completion of removal and treatment, Mr. Burr assured us that we were in no immediate danger of contamination before their arrival and certainly afterwards. Mr. Burr even contacted me the following day to see if I were pleased with the work once it had a chance to set overnight. If you have any mold issues or worries, I HIGHLY recommend you use Safety First Home Inspection & Decon, Inc."
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+59

Recommended by75%of homeowners
Avatar for Flood Crew LLC
Flood Crew LLC
4.6(
40
)
Radon Gas - Testing

Serving Welcome, MD and surrounding areas

In business since 2008

Free estimates

Emergency services offered

"Bill was very responsive and did a very thorough assessment of the water damage. He provided a detailed estimate for the work at a fair price. My homebuilder agreed to repair the damage and I didn’t need to hire Flood Crew LLC. I would hire Flood Crew LLC in the future if needed."
After carpets were cleaned.
Before and after of Medallion
After color sealed
Apartment carpet cleaning
Drying bathroom wood subfloor from kitchen using indirect control heat, controlled by thermostat we set in place

+57

Recommended by88%of homeowners
USA Universal Remodeling Paint & Drywall Co
3.8(
60
)
Radon Gas - Testing

Serving Welcome, MD and surrounding areas

In business since 2000

Free estimates

Emergency services offered

"The painters arrived on time, stayed late and worked dilligently.  They were very nice and responsive to my coments and observations.  However, unfortunately, after they left, I discovered that many details had been skipped and I spent another day repainting missed spots and fixing details.  In fairness, before they left, they told me to call if anything was not to my satisfaction and they would come back to fix it.  Since I did not have much time before I had to go on a long trip, I decided to do the work myself.  I feel slightly bad for complaining since they were so very nice and helpful, but the truth is they were careless and the overall quality of the work was not really great.
"
Wood Floor Restore
Paint raised walls
Drywall Repair  Installations
Recommended by72%of homeowners
Showing 1-10 of 13
FAQs for radon gas testing projects in Welcome, MD

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 Welcome, MD homeowners’ guide to radon gas testings

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