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Top-Rated Radon detection and reduction specialists in Portland - Updated Nov 2026

Avatar for Safe Radon Solutions, LLC
Safe Radon Solutions, LLC
4.9(
32
)
Radon Gas - Abatement

Serving Portland, ME and surrounding areas

Approved

In business since 2019

Free estimates

Warranties offered

"Nick and Dori are a good team. I was promptly contacted by Dori and after a quick phone call, we were able to schedule an appointment for radon mitigation. Nick showed up and installed everything. It took 2 days, but that was only because the day of the initial install was very windy and rainy. Nick was very conscious of safe work and did not perform unsafe tasks. Once the install was complete, they provided me with a radon test that I submitted for validation of mitigation."
Response time1 day
Response rate86%
3 neighbors recently requested a quote
Maine Line Water & Radon Treatment
4.9(
12
)
Radon Gas - AbatementRadon Gas - Testing

Serving Portland, ME and surrounding areas

In business since 2000

Free estimates

Credit card accepted

"Work is scheduled for June so I can speak to the initial meeting with them. Wayne was very friendly and took time to explain what I need done and why. He was very thorough and suggested things I had not been advised to do by a prior company that was not listed on Angi. He sent me a complete quote the same day that I accepted"
Response time1 day
Response rate100%
Recommended by100%of homeowners
Avatar for Rhino Radon Services
Rhino Radon Services
4.2(
9
)
Radon Gas - AbatementRadon Gas - Testing

Serving Portland, ME and surrounding areas

In business since 2014

Free estimates

Emergency services offered

"He was on time, arrived at 9am as quoted and began to install the system. The system required two suction points and a sump pit cover. The sump pit originally had a pedestal pump in place and none of the other radon companies would change the pedestal pump to a submersible pump as required for the mitigation system to function properly. Rhino Radon not only changed the pump but installed a back flow check valve to ensure proper functioning of the system. All of the other companies said we would have to employ a plumber or a handy man to get this done. Had we gone that route the closing would not have happened. Rhino Radon gladly did all the work required and didn't even break for lunch!!! He was more concerned with getting us out of the vacant house seeing we are already down the cape. The system that involved a crawl space and being vented through the garage roof was completed immaculately and the test results came back at 0.5 pCil/L. This pleased the lender and buyer and exceeded our expectations. We highly recommend Rhino Radon Services.
"
Recommended by100%of homeowners
Avatar for Main Choice Inspections
Main Choice Inspections
5.0(
82
)
Radon Gas - AbatementRadon Gas - Testing

Serving Portland, ME and surrounding areas

In business since 2013

Free estimates

Emergency services offered

"Main Choice Inspections is the best inspection company out there. They are so thorough and their reports are very detailed. They really are a one-stop-shop and do everything including: sewer line scoping, well flow test, septic inspection, mold testing, water testing, air radon testing, and the list goes on. I wouldn't hire anyone else to inspect my home! Always quick to respond and answer any questions for myself and my clients. When you use MCI to inspect your home.... you have them for life! FIVE STARS!"
Recommended by92%of homeowners
Avatar for Indy Properties, LLC
Indy Properties, LLC
4.5(
6
)
Radon Gas - Testing

Serving Portland, ME and surrounding areas

In business since 2018

Free estimates

Indy Properties LLC is the solution to all of your home inspection needs. We take great pride in our extreme professionalism, timeliness, and superior customer service on every job. We make sure to develop a lasting relationship, so that the next time service is needed, there will be no question on who to call.

New wall mount propane boiler
New electrical panel
Response time20 mins
Response rate91%
Recommended by100%of homeowners
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Radon Detection and Reduction FAQs, answered by experts

No level of radon is technically safe, but since it is present everywhere, complete avoidance is impossible. The average radon level in homes across the United States is 1.3 picocuries per liter (pCi/L). The Environmental Protection Agency (EPA) recommends taking preventative measures if your home's radon levels are between 2 and 4 pCi/L or higher.

No, air purifiers are not an effective way to reduce or remove radon. Radon is a radioactive, inert gas that cannot be filtered by standard air purifiers, which are designed to capture particulates like dust and mold. While an air purifier can improve indoor air quality by removing other pollutants, it should not be relied upon for radon. The only effective solution for high radon levels is a dedicated radon mitigation system.

Radon enters your home when warm air begins to rise and exits through the roof, creating a vacuum that pulls cooler air from under the foundation. Part of that air is radon, which is an invisible, odorless gas that develops naturally when radioactive particles are deep within the ground. Those particles usually come from decaying matter in soil and rocks.

The cost for a radon mitigation system typically ranges from $800 to $1,500, with an average around $1,000. The final price depends on several factors, including the size of your home, the severity of the radon issue, and the type of system required. Your home's foundation type also significantly impacts the cost. For example, sealing and ventilating an unfinished basement might cost around $4,600, while encapsulating a crawl space without a foundation slab can range from $1,500 to $15,000.

Yes, many systems include warranties for performance. Confirm terms with your installer.

The Portland, ME homeowners’ guide to radon detection and reduction services

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