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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

"Excellent customer service and a pleasure to work with. Nick did great work and Dori took care of us over the phone, got us set up quickly, and they followed through well. Radon dropped from >5 to .9 and system appears well-installed. Would recommend to anyone!"
Response time1 day
Response rate86%
3 neighbors recently requested a quote
Aqua-Max of Maine
4.4(
105
)
Radon Gas - Abatement

Serving Portland, ME and surrounding areas

In business since 1994

Free estimates

Warranties offered

"This year, my shop was in the basement (I make turned wooden bowls) radon level inexplicably increased from the 2.5 - 4.0 level to 8.0 - 11.0 level. I decided I was not going to work down there unless I did something about radon abatement. The guys said I needed one port under my basement floor, but I opted for two --- one near the exit port of the system and one in the center of the house. I had crushed stone and a vapor barrier under the floor, but radon was still getting in. After the installation lasting 3 hours, twenty-seven hours after install, the level was 0.83. Now after 1 week the level is 0.48 I am ok with that. I have not seen the results from the lab yet, but my continuous meter has been a good indication of what is happening. I am concerned now about radon in my drinking water, but cannot comment on that yet. Dick P Alna, ME"
Response time1 day
Recommended by96%of homeowners
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

Testing every 2-5 years or upon adjusting occupancy or structural changes maintains safe environments.

Installing a mitigation system reduces radon levels, which can cause lung cancer, providing peace of mind and long-term health benefits. It can also increase your home’s value, as many buyers prefer properties with radon safety measures in place. The investment is relatively low compared to the potential health risks associated with prolonged radon exposure.

Ideally, no one will live in a house with elevated radon levels, as prolonged exposure increases the risk of serious health issues like lung cancer. However, homes with radon can be made safe through mitigation systems, such as active soil depressurization. Testing for radon regularly and addressing high levels helps ensure a safe living environment.

You can vent radon out of your house sometimes by simply opening a window, but it won’t remove the source, and will likely rise above recommended levels quickly. A professional will be needed to assess your home, and determine the best strategy for radon removal. Active radon sump pumps and soil depressurization systems are often used to forcefully vent the radon from your home.

No level of radon is technically safe, but since it is naturally present everywhere, it is impossible to avoid entirely. 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 action to reduce radon levels if your home's test results are between 2 and 4 pCi/L or higher.

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

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