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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: What steps should be taken if high radon levels are detected?

• <div><p>If high radon levels are detected, steps include sealing entry points, installing a mitigation system, and retesting the air regularly to ensure reduced levels.</p></div>

Q: How do I test for radon gas?

• <div><p>Use a radon test kit or hire professionals to conduct a detailed assessment of radon levels in your home.</p></div>

Q: Do radon mitigation systems decrease home value?

• <div><p>No, radon mitigation systems do not decrease home value or make a home harder to sell. In areas where homes experience similar radon exposure risks, a radon mitigation system is viewed as an improvement. Potential homebuyers often opt to buy a home with a radon mitigation system already installed to reduce the risk of cancer for their families.</p></div>

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Verified Reviews for Radon Detection And Reduction pros in Custer, SD

*The Angi rating for Radon Detection And Reduction companies in Custer, SD 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 Custer, SD 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 June 18, 2026

Reviewed in June 2026
Dick and his crew did a superb job on our job. They preped poured and finished a 900 sq ft patio and sidewalk at my home. They removed the forms and cleaned up their mess and repaired any damage to my lawn. They did all of this in one day ! I would highly recommend this company !
Central Hills Construction
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Reviewed in April 2026
The pro videoed my pipes for relining purposes. He was very thorough and answered all my questions. Royal plumbing seems to have very professional people working for them. He was straight forward and told me exactly what needed to be down. He gave me a rough estimate of the cost, but told me he...
Loyal Plumbing Heating and Cooling
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Reviewed in March 2026
When a historic windstorm tore through Custer State Park during the night of December 17th?18th, 2026, it left our over 100-year-old cabin surrounded by devastation. Sustained high winds, with gusts exceeding 90 mph, brought down 11 mature trees, most between 80 and 110 feet, around our...
Deep Roots Tree Co.
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Reviewed in November 2025
Bighorn Contracting was awesome! They listened to our needs, gave great suggestions and gave us a finished product (fence) that is top quality! It was a fence along forest service land so it wasn’t supposed to be “pretty” but it’s very sturdy and professional looking. We couldn’t be more pleased...
Bighorn Contracting
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Reviewed in October 2025
This handyman, was clean, quick and efficient. He replaced my main entrance door for me. I no longer have a drafty door in my house as he made sure it was fit correctly and secured well.
DeafJam Handyman Services
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Reviewed in December 2024
Excellent communication. Made sure job was done right and to my liking. Said if any issues call and will come back and take care of it. I will not hesitate to call them for future projects. Thank you Jeremy and Shane for a job well done.
ProCraft Construction
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Reviewed in September 2024
I was always able to contact the company with any questions. They helped me deal with the insurance company and really advocated in my behalf. They were on time and finished the job when they said they would. I trusted them and felt like we had great communication. They were professional and...
Haus Line Exteriors
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Reviewed in April 2024
They do awesome work, friendly, and know what they are doing.
Teske Services, LLC
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Reviewed in December 2023
They were easy to contact and talk to. They were efficient and thorough as well as cost effective. They went the extra mile for us.
Elk Ridge Construction
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Reviewed in September 2022
Statler kept us informed of when he would be able to come to do the work. Safety was always taking place throughout the project. He would check with us during the project to make sure the trees were being trimmed as asked and he also had helpful ideas to help the health of the trees in the...
Limb Walkers Tree, LLC
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Find Radon detection and reduction specialists in Custer

ALO Radon

4.9(

)

Radon Gas - AbatementRadon Gas - Testing

Serving Custer, SD and surrounding areas

Approved

In business since 2020

Free estimates

Emergency services offered

"Anthony was very polite and knowledgeable. The hole job was done in two days. Radon readings went from 14 to 34 down to 0.4, we are very happy ."

+13

Response time3 hrs

Response rate94%

1 neighbors recently requested a quote

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Blackburn Foundation Repair, LLC

4.6(

)

Radon Gas - AbatementRadon Gas - Testing

Serving Custer, SD and surrounding areas

Approved

In business since 1992

Free estimates

Warranties offered

"Excellent service! Pro was nice, easy to work with, professional! Never would have known he was here, he cleaned the working area so well! I would definitely recommend Blackburn Basement!!"

Response time1 day

95 neighbors recently requested a quote

Recommended by80%of homeowners

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Black Hills Radon

New to Angi

Radon Gas - AbatementRadon Gas - Testing

Serving Custer, SD and surrounding areas

Approved

In business since 2022

Free estimates

Black Hills Radon is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests, and make their concerns the basis of our business.

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Advanced Radon Mitigation

4.9(

)

Radon Gas - Abatement

Serving Custer, SD and surrounding areas

In business since 2000

Free estimates

"Great team! Courteous, knowledgeable and responsive, what more can a homeowner ask? As it turned out, our home tested below the limits for mitigation. Had the work been required, we were ready to hire."

Response time12 hrs

Recommended by100%of homeowners

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Black Hills Professional Home Inspections LLC

New to Angi

Radon Gas - Testing

Serving Custer, SD and surrounding areas

In business since 2010

Top rated inspector in the Black Hills area

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Empire Home Inspections, LLC

New to Angi

Radon Gas - Testing

Serving Custer, SD and surrounding areas

In business since 2022

Free estimates

Credit card accepted

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! Book with us online or feel free to give us a call today!\n\n

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Radon Detection and Reduction questions, answered by experts

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.

If high radon levels are detected, steps include sealing entry points, installing a mitigation system, and retesting the air regularly to ensure reduced levels.

Use a radon test kit or hire professionals to conduct a detailed assessment of radon levels in your home.

No, radon mitigation systems do not decrease home value or make a home harder to sell. In areas where homes experience similar radon exposure risks, a radon mitigation system is viewed as an improvement. Potential homebuyers often opt to buy a home with a radon mitigation system already installed to reduce the risk of cancer for their families.

The Custer, SD 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
•
Sep 28, 2026Sep 28, 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
•
Sep 23, 2026Sep 23, 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.