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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: Why is radon detection important for residential properties?

• <div><p>Radon detection is crucial as prolonged exposure to radon gas, a leading cause of lung cancer, poses significant health risks in residential environments.</p></div>

Q: Why is my radon mitigation system so loud?

• <div><p>Your radon mitigation system may be loud because it&rsquo;s time to replace it. Any sounds are usually from the inline fan that helps create the vacuum and resulting airflow. If you hear a new, loud mechanical or humming noise from your radon fan, it might be time to replace it. Most fans used in radon mitigation systems last up to 10 years, but may need to be replaced sooner.</p></div>

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: How much does it cost to replace a radon fan?

• <div><p>The cost to replace a radon fan ranges from $300 to $600 for the fan itself, with installation adding an additional $200 to $500. Overall, the total cost for replacement can range from $500 to $1,100, depending on factors such as the fan model, home size, and local labor rates. If the fan is part of a larger radon mitigation system, the price may be higher.</p></div>

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Verified Reviews for Radon Detection And Reduction pros in Monticello, IL

*The Angi rating for Radon Detection And Reduction companies in Monticello, IL 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 Monticello, IL 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 August 22, 2025

Reviewed in August 2025
Michael Lyday was the technician and was very professional and courteous. He set a trap and returned the next morning to find a female raccoon. He also found she’d been nursing and captured two kits in the crawl space. He told me to tell him if I heard anymore sounds which I did when he returned...
Plunkett's Pest Control
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Reviewed in December 2024
I had 6 stumps and an entire large bush pulled out by this company. They hauled off everything and filled in the holes where the stumps and bush had been. They leveled the soil in all areas where they had worked, and there were no ruts left from the machinery they used in the yard at all. I...
Kaskaskia Outdoor Specialties LLC
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Reviewed in October 2024
Tyler and his entire team worked quickly and effectively to get our old, improperly installed metal roof removed and cleaned up and installed an entirely new shingle roof as well as all new sheeting to insure my roof was installed correctly and would last for numerous years to come. He and his...
Redemption Contractors LLC
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Reviewed in September 2023
Clean Green was easy to work with, completed work in a timely manner and did a fine job on the tree removals. We would hire him gain.
Clean Green Services
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Reviewed in February 2023
The wok was done fast and adficient. He was very respectable to me and to my house. The tub came out great and saved me a ton.
Premier Glazing & Restoration LLC
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Reviewed in March 2022
Very prompt and thorough with inspection
Pristine Inspections & Testing, Inc.
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Reviewed in October 2021
It was a flea infestation. I know fleas are hard to get rid of but they were still very present after the initial treatment. Six days later they came back and did another treatment at no extra cost, and while we're still seeing some live fleas, it's much better. The manager and technicians...
Independent Pest Solutions, LLC
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Reviewed in September 2021
Tony was very prompt in coming by to take a look at the job. He was very professional and explained what needed to be done and how long it would take, They were done in just a couple of days and it turned out beautifully, i would highly recommend them to take of your project.
Clifton Excavating
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Reviewed in July 2021
Rex reached out to us right away. He completed our survey work the next day. Our land included some overgrown areas, a creek and old pins. He got it done and was patient with my questions!
Rex A Bradfield
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Reviewed in June 2021
They provided the next to lowest estimate of the 5 we got, and the thoroughness of Justin Henry's inspection made up the difference. The crew arrived early each morning and cleaned up the yard every evening. They did complete shingles for house and garage, roof repairs where needed, installed...
Honest Roofing, LLC
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Radon Detection and Reduction questions, answered by experts

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.

Radon detection is crucial as prolonged exposure to radon gas, a leading cause of lung cancer, poses significant health risks in residential environments.

Your radon mitigation system may be loud because it’s time to replace it. Any sounds are usually from the inline fan that helps create the vacuum and resulting airflow. If you hear a new, loud mechanical or humming noise from your radon fan, it might be time to replace it. Most fans used in radon mitigation systems last up to 10 years, but may need to be replaced sooner.

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.

The cost to replace a radon fan ranges from $300 to $600 for the fan itself, with installation adding an additional $200 to $500. Overall, the total cost for replacement can range from $500 to $1,100, depending on factors such as the fan model, home size, and local labor rates. If the fan is part of a larger radon mitigation system, the price may be higher.

The Monticello, IL 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

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.
Alison Kasch
•
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.
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.
Amy Freeman
•
Jul 9, 2026Jul 9, 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
•
Jul 9, 2026Jul 9, 2026
What Is Radon and How Does It Get In Your Home?
What is radon gas? Find out what this radioactive gas is, why it is dangerous, how it gets in your home, and how to mitigate it.
Jacqueline DeMarco
•
Jul 9, 2026Jul 9, 2026
What Is Radon Testing?
What is radon testing? Radon testing measures the presence and concentration of radon gas within indoor environments. Read on to learn more.