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Find Radon gas testers in Norwalk

Avatar for Lance Dorfi, LLC
Lance Dorfi, LLC
4.8(
59
)

Serving Norwalk, CT and surrounding areas

Approved

In business since 2010

Free estimates

Emergency services offered

"I value expertise and we are working together to find the source of the radon readings and will discuss remediation after the next test results."
Job Site
Response time2 days
28 neighbors recently requested a quote
Recommended by96%of homeowners
Avatar for Apex Radon Solutions LLC
Apex Radon Solutions LLC
5.0(
8
)

Serving Norwalk, CT and surrounding areas

Approved

In business since 2015

Free estimates

Warranties offered

"They are precise, professional and extremely thorough. The follow through was exemplary. I would recommend them to everyone!"
Roof penetration for esthetics
Interior Esthetic Package
Exterior Radon Fan
Exterior Radon Fan
Exterior Radon Fan

+3

Response time2 days
23 neighbors recently requested a quote
Recommended by100%of homeowners
Oakhill Home Inspections
5.0(
1
)

Serving Norwalk, CT and surrounding areas

Approved

In business since 2025

Free estimates

Emergency services offered

I pride my company on reliability, great communication, integrity, and quality work. I am an expert in home inspections, mold testing and radon testing and remediation. I will do my absolute best to keep you as educated and informed on your particular inspection project. I look forward to earning your business! Book with me online or feel free to give me a call today! My focus is protecting your home investment.\n\nThank You,\nCharles Rauch\nOakhill Home Inspections

Response time5 hrs
12 neighbors recently requested a quote
Avatar for The Lab
The Lab
New to Angi

Serving Norwalk, CT and surrounding areas

Approved

In business since 2020

Emergency services offered

Small jobs welcome

The Lab 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 combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests, and make their concerns the basis of our business.

Response time1 day
2 neighbors recently requested a quote
Avatar for Northeast Mitigation Services
Northeast Mitigation Services
4.9(
80
)

Serving Norwalk, CT and surrounding areas

In business since 2005

Free estimates

Emergency services offered

"Amazing! Fernando was really helpful. He looked at our job, and helped us navigate an erroneous elevated radon level due to the weather. He saved us in a situation where we would have spent a thousand without solving anything. Thank you. Your guidance and engagement was very helpful."
Recommended by96%of homeowners
Avatar for First Inspect Home Inspections
First Inspect Home Inspections
5.0(
10
)

Serving Norwalk, CT and surrounding areas

In business since 2015

Free estimates

Warranties offered

"Dave was amazing. He was able to be at our home that week as it was time sensitive. He showed up early to get a head start on the outside and roof. He spent SIX hours with us. He inspected each room and every detail... taking pictures and notes as he went. He was even OK with us asking questions throughout the process and was happy to share his knowledge with us. He went as far to look at things 3 or 4 times until he found out why it wasn't working (i.e. electrical). We loved working with Dave and would recommend him to anyone and everyone."
Recommended by100%of homeowners
Avatar for Water Dr LLC
Water Dr LLC
4.8(
57
)

Serving Norwalk, CT and surrounding areas

In business since 2010

Free estimates

Emergency services offered

"I called late Sunday night. Rick the owner answered the phone. Said he would be at my home Monday AM. Fred and Matt showed up at 9 AM, diagnosed the problem, and had a new pump installed in 1 hour! <br /> HIGHLY RECOMMEND THEM. <br />"
Recommended by92%of homeowners
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FAQs for radon gas testing projects in Norwalk, CT

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 Norwalk, CT homeowners’ guide to radon gas testings

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