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Find Radon gas testers in Philadelphia

Avatar for The Radon Bros
The Radon Bros
5.0(
6
)
Radon Gas - Testing

Serving Philadelphia, PA and surrounding areas

Approved

Super Service Award Winner

In business since 2018

Free estimates

Warranties offered

"Excellent, very satisfactory. Radon Brothers' rep came, saw the problem, and replaced the leaking radon exhaust PVC pipe in my basement floor. All in record time. Am very satisfied and will continue using Angi contractors."
Installations
Installations
Installations
Installations
Installations

+8

Response time1 day
Response rate100%
12 neighbors recently requested a quote
Avatar for SIS Mold & Home Inspections
SIS Mold & Home Inspections
5.0(
2
)
Radon Gas - Testing

Serving Philadelphia, PA and surrounding areas

Approved

In business since 2015

Free estimates

Credit card accepted

"I have worked with SIS on numerous occasions as I completely trust them with my testing needs (mold & radon). They are responsive and knowledgeable, having extensive training and experience. Bob and Mary Ann are professional and courteous while providing a competitive price for their services. I highly recommend SIS for mold and radon testing!"
Toxic Mold
Mold under rug at bathroom
Subfloor and joist
Basement Closet
Bedroom Closet

+3

Response time4 hrs
Recommended by100%of homeowners
Avatar for BOR of Montgomery County
BOR of Montgomery County
5.0(
1
)
Radon Gas - Testing

Serving Philadelphia, PA and surrounding areas

Approved

In business since 2024

Free estimates

Emergency services offered

At Best Option Restoration of Montgomery County, we specialize in comprehensive disaster restoration services. Our team is dedicated to safeguarding homes and businesses from the damaging effects of mold, water, and storms. Here’s what sets us apart:\n\nMold Remediation: Our certified experts assess and isolate mold contamination, ensuring thorough removal and preventing further spore spread. We identify the root cause, devise effective solutions, and prioritize your safety.\nWater Removal and Storm Damage Restoration: When water wreaks havoc due to storms or other incidents, we’re here to help. Our 24/7 emergency response team swiftly tackles water extraction, drying, and structural repairs.\n\nComprehensive Services: Beyond mold and water remediation, we handle storm damage repairs, basement flood cleanup\nChoose Best Option Restoration of Montgomery County for reliable, efficient, and compassionate restoration services. We’re committed to restoring peace of mind and protecting your property.

3 neighbors recently requested a quote
Avatar for Radon Shield LLC
Radon Shield LLC
4.9(
103
)
Radon Gas - Testing

Serving Philadelphia, PA and surrounding areas

In business since 2014

Free estimates

Emergency services offered

"Radon Shield was hired after I got a higher then expected reading for radon in by home when selling it. Benedict shared a lot of great advice about radon gas in the home, he was able to schedule the install in a very fast time frame which was extremely helpful because I was selling my home. The quality of work was outstanding and he did a great job explaining thing to me and by wife. He also did a great job cleaning up after the install. I would hire Radon Shield in the future in needed."
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+10

Recommended by100%of homeowners
Avatar for Keystone Radon Mitigators
Keystone Radon Mitigators
4.7(
43
)
Radon Gas - Testing

Serving Philadelphia, PA and surrounding areas

In business since 2008

Free estimates

Emergency services offered

"adon After I contacted him, he responded promptly.  While evaluating the area that needed radon mitigation, he called to discuss an area that had not been evaluated by inspectors (not affiliated with him).  After accepting his price, we agreed on the day for the installation.  During the installation, he was respectful and communicative.  After completing the installation, he provided written warranties for me and the buyer.  I highly recommend Keystone Radon Mitigators.
"
Recommended by94%of homeowners
Avatar for J & A Environmental Services
J & A Environmental Services
4.9(
44
)
Radon Gas - Testing

Serving Philadelphia, PA and surrounding areas

In business since 2019

Free estimates

Emergency services offered

"J&A Environmental Services did a wonderful job. They were quick, trustworthy, responsible, and efficient. They were respectful and kind. I would highly recommend them and would hire them any time. After they did the mold remediation, they replaced the drywall and painted the area that needed it. They worked neatly and carefully."
Toxic Mold
Mold Testing & Remediation Project
Cleaning
Mold Testing & Remediation Project
Mold Remediation

+88

Response time2 days
Recommended by93%of homeowners
Avatar for RAM Environmental
RAM Environmental
5.0(
14
)
Radon Gas - Testing

Serving Philadelphia, PA and surrounding areas

In business since 2020

Free estimates

Emergency services offered

"The work went better than I expected it too. I was nervous but Brandon was very informative and explained everything to me. Their were no hidden fees. It was done in a timely matter and the quality of work was great. Now I feel safe in my home mold free. I would recommend him to anyone who needs quality work done right without braking the bank. No scams, just great work."
Recommended by100%of homeowners
Avatar for Basements.com
Basements.com
4.5(
46
)
Radon Gas - Testing

Serving Philadelphia, PA and surrounding areas

Free estimates

Emergency services offered

Credit card accepted

"We had an old sump system that was about 17 years old, and was allowing mold to run rampant around our basement. Basements.com not only gave me the best estimate, but they were by far the most knowledgeable about waterproofing and repairing the drainage issues. When they arrived they did a superb job replacing the old system and installing a new, far superior system. They also made sure that the system was closed, so no moisture or radon could leak up from the floors. I was extremely pleased with their level of service and the quality of the product. I highly recommend their service!"
19074 - Before (1)
19406 - 1
Getting ready to lay steel mesh prior to concrete pour.
Homeowner Exterior Drainage Problem
19074 - After (1)

+85

Recommended by92%of homeowners
Showing 1-10 of 16
FAQs for radon gas testing projects in Philadelphia, PA

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 Philadelphia, PA homeowners’ guide to radon gas testings

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