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Q: What is the biggest source of radon?

• <div><p>The soil beneath your house is most likely what&rsquo;s causing an increased level of radon. This is because soil holds radioactivity for a long time and it&rsquo;s also what most buildings are built on. Another common source of radon is water from a source that hasn&rsquo;t been through periodic radon tests, such as well water. Over time, the radon from the soil can inhabit other parts of your house like the foundation or plumbing.</p></div>

Q: What level of radon is considered safe or dangerous?

• <div><p>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.</p></div>

Q: Do air purifiers help with radon?

• <div><p>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.</p></div>

Q: How long can you go without a radon fan?

• <div><p>Your radon fan needs to operate 24/7 to be effective. The only time the fan isn't operating is during its replacement. Radon levels in the home can increase within hours if the fan stops working or something obstructs the stack vent. Fortunately, radon systems require no downtime maintenance between fan changes.</p></div>

Q: What is considered a safe or dangerous level of radon?

• <div><p>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.</p></div>

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Verified Reviews for Radon Detection And Reduction pros in Ravalli County, MT

*The Angi rating for Radon Detection And Reduction companies in Ravalli County, MT is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Radon Detection And Reduction needs.

*The HomeAdvisor rating for Radon Detection And Reduction companies in Ravalli County, MT is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Radon Detection And Reduction needs.

Last update on March 02, 2026

Reviewed in March 2026
We had 23 windows replaced in our 2 1/2 story home. The crew of 2 completed the job in 4 days, in mid December. Our home is located next to a highway, and the first nothing we noticed was a reduction in road noise. We have also realized an increase in heat retention in the home. We would...
Renewal by Andersen of Montana
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Reviewed in July 2025
We were looking to have a driveway put into the family property. Rocky Mountain Construction was the only construction company that contacted us back. They visited the site, and we explained what we would like. They gave us options to cut down costs, and they not only got to work right away, but...
Rocky Mountain Construction
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Reviewed in June 2025
We bought our house in August 2024 and didn’t have the time to even think about our gutters with all of the other house projects we needed done. We had Tanner come out this spring and just expected a simple clean out…he meticulously cleaned and checked every inch to make sure things were in good...
The gutter guy of Montana llc
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Reviewed in June 2023
Clean, timely, and professional. Happy with the flooring.
DNA Wood Working LLC
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Reviewed in November 2022
Mark is very knowledgeable and very helpful when youâ re deciding on right woodstove for you.
Orca Fireplace, LLC
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Reviewed in July 2021
Very professional and detailed in his reports. His prices are amazing. I would hire him again for sure. I paid $160 MORE for a home inspection earlier this month through someone else and it wasnâ t nearly as detailed as this one.
Gunstock, LLC
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Reviewed in February 2021
Very responsive, Tim was wonderful, and great value for money
Jordan Solar and Electric
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Reviewed in February 2021
I could not be more pleased with the quality of workmanship that he did. How quickly he got it done. And how good it looks. I was able to save money with better quality. there is nothing he could've done that would've made me more pleased. He's a great person and a very hard worker. And he wants...
Premier Fence, LLC
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Reviewed in August 2020
Considering my father's situation was unique and very sensitive - Mr. Figueroa was a pro. He did an amazing job with an ugly situation and a quick turn around too. He was very professional yet personal and for this we are so very grateful. I highly recommend this company for any move especially...
Empire Moving Services LLC
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Reviewed in May 2020
Excellent people, very knowledgeable, friendly and professional. Kept us informed of what was to be done and steps to do it. Excellent work and attention to detail. Would recommend them.
Garage Floor Coating of Montana
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Find Radon detection and reduction specialists in Ravalli County

Inspection Advantage, LLC

4.9(

)

Serving Ravalli County, MT and surrounding areas

In business since 2018

Free estimates

Credit card accepted

"Ethan was super personable, answered all my questions, and helped me to really understand exactly what I was getting from my home purchase. I would recommend Inspection Advantage to everyone."

Home Inspection in White Sulphur Springs, MT

Response time4 hrs

Recommended by100%of homeowners

Serving Ravalli County, MT and surrounding areas

In business since 2012

Free estimates

Credit card accepted

"Ben is thoroughly knowledgeable and answered all of my questions kindly and patiently. The price was fair. I highly recommend him."

Recommended by100%of homeowners

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Caldwell Property Inspections

New to Angi

Serving Ravalli County, MT and surrounding areas

In business since 2021

Free estimates

Credit card accepted

At Caldwell Property Inspections- our company is based on the belief that our customers' needs are of the utmost importance. Our team is committed to meeting those needs. We welcome the opportunity to earn your trust and deliver you the best service. No job is too big or too small for our experienced team. Call today for a quote.

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Complete Restoration Facebook

5.0(

)

Serving Ravalli County, MT and surrounding areas

In business since 1986

Free estimates

Emergency services offered

We pride our company on reliability, great communication, integrity, and quality work. We are experts in our trade and will do our best to keep you as educated as we can on your particular task or project. We look forward to earning your business!

Response time1 day

Recommended by100%of homeowners

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TCH Builders & Remodeling

4.0(

)

Serving Ravalli County, MT and surrounding areas

In business since 1999

Emergency services offered

Credit card accepted

If you dream it, we can build it. What's the biggest difference between us and them? We build to last! We offer a full line of Green and Energy Star Certified products, backed by our labor and manufacturer's lifetime transferable warranties. Credit Cards Welcome Financing Available OAC.

Recommended by100%of homeowners

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Radon Detection and Reduction questions, answered by experts

The soil beneath your house is most likely what’s causing an increased level of radon. This is because soil holds radioactivity for a long time and it’s also what most buildings are built on. Another common source of radon is water from a source that hasn’t been through periodic radon tests, such as well water. Over time, the radon from the soil can inhabit other parts of your house like the foundation or plumbing.

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.

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.

Your radon fan needs to operate 24/7 to be effective. The only time the fan isn't operating is during its replacement. Radon levels in the home can increase within hours if the fan stops working or something obstructs the stack vent. Fortunately, radon systems require no downtime maintenance between fan changes.

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.

The Ravalli County, MT homeowners’ guide to radon detection and reduction services

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

See all articles

Angi
•
Mar 18, 2026Mar 18, 2026
How Much Does Radon Testing Cost? [2026 Data]
Find out what impacts radon testing costs, including average prices for DIY kits and professional services, so you can protect your home and budget confidently.
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Apr 6, 2026Apr 6, 2026
How Much Does Radon Remediation Cost? [2026 Data]
Get clear answers on how much radon remediation costs, including average prices, key cost factors, and tips to save money on your home’s radon mitigation.
Mitchell Grant
•
Mar 18, 2026Mar 18, 2026
How Much Does a Radon Mitigation System Cost? [2026 Data]
The cost of a radon mitigation system depends mostly on the type of system being installed. Use this guide to learn about your options.
Dan Simms
•
Apr 5, 2026Apr 5, 2026
5 Questions to Ask About Radon Gas Abatement
Radon is a radioactive gas that can enter a home from the ground. Prepare yourself for mitigation by answering these questions before hiring a pro.
Amy Freeman
•
Apr 5, 2026Apr 5, 2026
Who Installs Radon Mitigation Systems?
Radon is a gas that you can't see or smell and is harmful to your health. If your home has radon, you need to know who installs radon mitigation systems.
Jacqueline DeMarco
•
Apr 5, 2026Apr 5, 2026
DIY Radon Mitigation: A Step-by-Step Guide
Want to learn how to master DIY radon mitigation? We have a step-by-step guide on how to complete this challenging project on your own.

What do you need done? We’ll find top pros.

🌱 "Mow a small front yard"
🛠 "Fix a leaking pipe under the sink"
🏠 "Repair shingles on an asphalt roof"

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Need a pro for your radon detection and reduction project in Ravalli County, MT?

Radon Gas Testing

Radon Gas Abatement

Indoor Air Quality Testing

Verified Reviews for Radon Detection And Reduction pros in Ravalli County, MT

Find Radon detection and reduction specialists in Ravalli County

The Ravalli County, MT homeowners’ guide to radon detection and reduction services

How Much Does Radon Testing Cost? [2026 Data]

How Much Does Radon Remediation Cost? [2026 Data]

How Much Does a Radon Mitigation System Cost? [2026 Data]

5 Questions to Ask About Radon Gas Abatement

Who Installs Radon Mitigation Systems?

DIY Radon Mitigation: A Step-by-Step Guide

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Get matched with top radon detection and reduction specialists in Ravalli County, MT

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Need a pro for your radon detection and reduction project in Ravalli County, MT?

Radon Gas Testing

Radon Gas Abatement

Indoor Air Quality Testing

Verified Reviews for Radon Detection And Reduction pros in Ravalli County, MT

Find Radon detection and reduction specialists in Ravalli County

The Ravalli County, MT homeowners’ guide to radon detection and reduction services

How Much Does Radon Testing Cost? [2026 Data]

How Much Does Radon Remediation Cost? [2026 Data]

How Much Does a Radon Mitigation System Cost? [2026 Data]

5 Questions to Ask About Radon Gas Abatement

Who Installs Radon Mitigation Systems?

DIY Radon Mitigation: A Step-by-Step Guide

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