Top-rated radon detection and reduction specialists.

Get matched with top radon detection and reduction specialists in Calmar, IA

Q: What types of radon mitigation systems are available?

• <div><p>Options include sub-slab depressurization, crawlspace ventilation, and sealing cracks. Choose based on home construction and radon levels.</p></div>

Q: How often should you replace a radon fan?

• <div><p>Many radon fans carry a five-year manufacturer's warranty. That said, your radon fan should last between five and ten years. Regular inspections will ensure the fan is operating properly. Unusual or exceptional noise coming from the fan or indications on your manometer or system monitor can immediately tell you that something is amiss.</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: 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: How do you remove radon from your home?

• <div><p>You can vent radon out of your house sometimes by simply opening a window, but it won&rsquo;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.</p></div>

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Verified Reviews for Radon Detection And Reduction pros in Calmar, IA

*The Angi rating for Radon Detection And Reduction companies in Calmar, IA 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 Calmar, IA 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 February 11, 2026

Reviewed in February 2026
Mad City was very timely: arrived when they said they would, called ahead of time, and finished within the time frame. I was also impressed by how thoroughly Nick cleaned up after he was finished. The shower replacement is great and looks so much better than the old tub/shower combo that was...
Mad City Windows & Baths
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Reviewed in July 2025
Edgar’s communications via email, phone and text were great - he always responded quickly. And he always showed up on the day he said he would work. He and his team worked very hard day to day and also had very good manners. This was a big job - garage floor, corner lot with lots of sidewalks...
Camacho's Concrete LLC
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Reviewed in July 2025
Northland handyman services was the first to reach out to me about my project. They made it extremely easy for me to brief them on the project at hand and gave clear estimates around the work they could do and when. They came to scope the job right away, gave honest guidance and feedback...
Northland Handyman Services
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Reviewed in December 2024
Laura was extremely thorough and prompt. She always communicated anything she saw in my house that needed attention. She did a fantastic job, and I was sorry to see her moving out of my area.
Laura Gillespie Services
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Reviewed in November 2023
Done timely, reasonably priced and clean
Farley Construction LLC
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Reviewed in October 2023
Brian did a great job cleaning. He was very thorough and made sure he was doing everything as I wanted. Communication was excellent throughout the process.
B&L Cleaning Service
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Reviewed in June 2023
Attention to detail and amazing customer service
Johnson Construction
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Reviewed in June 2023
Anthony came down to finish the work that was unable to be completed and checked over the work done. Very very pleased with the workmanship and each workers’ work, politeness, and professionalism. Very satisfied.
River Valley Remodelers, LLC
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Reviewed in August 2022
Tyler was professional, responsive, timely and did a great job in a short window So glad I found him on Angi He will go a long way if he keeps that business model
Brags Sewer And Septic
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Reviewed in November 2021
Great, guy was friendly and professional, was up front and honest and affordable. I would hire him again to work on my computers.
Vorthmann Computer Repair
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Find Radon detection and reduction specialists in Calmar

Milledge Construction

4.9(

)

Serving Calmar, IA and surrounding areas

Approved

In business since 2020

Free estimates

Warranties offered

"Installed in timely manner. Have to wait on radon test to see if it works."

Response time7 hrs

Response rate94%

86 neighbors recently requested a quote

Serving Calmar, IA and surrounding areas

Approved

In business since 1989

Free estimates

Warranties offered

"This job was completed efficiently and professionally. A design specialist came to test and measure every detail for the project. The crew arrived with everything needed for the job. They worked very hard to install Waterguard in the concrete floors inside around the foundation to the sump pump basket. They also installed Geo-lock anchors to support a block wall that was bowed. This company has 36 years in business and provides excellent results and professional customer relations. Call Amer. Wtrwrks for a free estimate. You will not be disappointed. A wise investment of $11,270."

Increased Efficiency of Crawlspace in Elk Mound

+156

Response time4 hrs

646 neighbors recently requested a quote

Recommended by91%of homeowners

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SWAT Environmental, Inc.

4.5(

)

Serving Calmar, IA and surrounding areas

In business since 1988

Free estimates

Credit card accepted

"They did a great job with the installation and made sure the Radon was under the level it needed to be. He had to make a couple of trips to make that happen but was very polite and profession through the whole process."

Response time1 day

Recommended by100%of homeowners

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Home Sweet Home Inspect Iowa Facebook

4.8(

)

Serving Calmar, IA and surrounding areas

In business since 2020

Free estimates

Small jobs welcome

"Luis was very polite and professional! He explained the issues so I could understand. I would absolutely recommend him to others!"

+11

Response time3 hrs

Response rate88%

Recommended by100%of homeowners

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Radon Detection and Reduction questions, answered by experts

Options include sub-slab depressurization, crawlspace ventilation, and sealing cracks. Choose based on home construction and radon levels.

Many radon fans carry a five-year manufacturer's warranty. That said, your radon fan should last between five and ten years. Regular inspections will ensure the fan is operating properly. Unusual or exceptional noise coming from the fan or indications on your manometer or system monitor can immediately tell you that something is amiss.

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.

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.

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.

The Calmar, IA 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
•
Aug 3, 2026Aug 3, 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.