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Q: What would cause radon in a house?

• <div><p>The natural breakdown of uranium in soil, rock, and water can cause radon to appear in a home. The gas seeps into homes through cracks in foundations, walls, or floors, as well as through gaps around pipes or construction joints. Radon levels are influenced by soil composition, building materials, and ventilation. Poorly sealed or airtight homes can trap radon, allowing it to accumulate.</p></div>

Q: How often should radon levels be tested to ensure safety?

• <div><p>Testing every 2-5 years or upon adjusting occupancy or structural changes maintains safe environments.</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>

Q: What are the risks of radon?

• <div><p>Radon is the number one non-smoking cause of lung cancer in the United States, but it can cause some other concerning side effects in the meantime. If you have a raspy voice, chest pains, trouble breathing, difficulty swallowing, or any of the above, don&rsquo;t hesitate to perform radon testing and install a mitigation system as soon as possible.</p></div>

Q: How does radon enter my home?

• <div><p>Radon enters your home when warm air begins to rise and exits through the roof, creating a vacuum that pulls cooler air from under the foundation. Part of that air is radon, which is an invisible, odorless gas that develops naturally when radioactive particles are deep within the ground. Those particles usually come from decaying matter in soil and rocks.</p></div>

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

*The Angi rating for Radon Detection And Reduction companies in Watertown, 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 Watertown, 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 February 20, 2026

Reviewed in February 2026
Miguel was excellent. Checked everything inside and out. Explained how termites work and what to look for.
Cummings Termite & Pest Control
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Reviewed in October 2025
We hired Lindner Lawn Care and Home Improvement to construct a new porch/steps on the rear of our home. We are very pleased with the craftsmanship put into our project. Owner/Operator Nolan Lindner did an outstanding job from start to finish. We have a few other projects for next spring and...
Lindner Lawn and Home Improvement
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Reviewed in October 2025
Craig was great help with picking out the new shingles and new railing and was able to have the new roof done a week later.
Craig Johnson Contracting, LLC
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Reviewed in September 2024
We called Bo and he came out Saturday and fixed the problem for us and he was very respectful and honest. He did a great Job and he is the one that is our go to for sure. Quick response and definitely an honest hard working and that makes all the difference knowing I do not have to worry at all...
Greywater
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Reviewed in June 2024
This was a most pleasant experience! Workers were polite, kind, informative and the work was done very efficiently and done extremely well. The windows look beautiful and surpassed our expectations! Thank you so much, we would 100% recommend this company and Stacy, Rustee’s team!!
Renewal by Andersen Lake Superior Region
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Reviewed in September 2022
Matt showed on time and worked efficiently. I would hire him again
Advocate Home Solutions
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Reviewed in July 2022
Adam and his team are very hard workers. There were a few issues that surfaced throughout the process and Adam address all in a professional manner. Adam offered to deliver more rock that I requested, Adam gave me, a disabled Veteran, a 10% military discount, he saved me money by showing me how...
Mertz Fencing
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Reviewed in February 2022
Excellent! Bryan kept me informed during the process and he takes pride in his work! He is very detailed and his quality of work is second to nobody!
Total Contracting and Improvements, LLC
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Reviewed in June 2021
They worked efficiently and were easy to work with. We were able to get back to normal life quickly. Personnel was kind to adults, children, and pets.
Commercial Building Maintenance and Restoration
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Find Radon detection and reduction specialists in Watertown

Blackburn Foundation Repair, LLC

4.6(

)

Serving Watertown, SD and surrounding areas

Approved

In business since 1992

Free estimates

Warranties offered

"Blackburn came out to repair my garage foundation. They were quick, efficient, and left the area in great condition."

Response time1 day

87 neighbors recently requested a quote

Recommended by80%of homeowners

Serving Watertown, SD and surrounding areas

Approved

In business since 2008

Free estimates

Small jobs welcome

"He did what I ask for and he did a good job."

Response time1 day

5 neighbors recently requested a quote

Recommended by50%of homeowners

Serving Watertown, SD and surrounding areas

In business since 2021

Free estimates

Credit card accepted

"Jeremy was very professional and pleasant to work with!! I have allergies and can breathe so much better in my house now!!"

Response time20 mins

Recommended by100%of homeowners

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Solar Solutions - Home Facebook

0.0(

)

Serving Watertown, SD and surrounding areas

In business since 1996

Free estimates

We have been your testing and abatement source, energy audits, remodeling, weatherization, radon mitigation, testing for mold, lead and asbestos.\nStudies have shown that homes that are efficiently built or retrofitted with energy efficient measures are not only cheaper to own, but more comfortable, and quiet. We can audit you home to evaluate the performance of your systems.\n

Recommended by100%of homeowners

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Empire Home Inspections, LLC

New to Angi

Serving Watertown, 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

The natural breakdown of uranium in soil, rock, and water can cause radon to appear in a home. The gas seeps into homes through cracks in foundations, walls, or floors, as well as through gaps around pipes or construction joints. Radon levels are influenced by soil composition, building materials, and ventilation. Poorly sealed or airtight homes can trap radon, allowing it to accumulate.

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

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.

Radon is the number one non-smoking cause of lung cancer in the United States, but it can cause some other concerning side effects in the meantime. If you have a raspy voice, chest pains, trouble breathing, difficulty swallowing, or any of the above, don’t hesitate to perform radon testing and install a mitigation system as soon as possible.

Radon enters your home when warm air begins to rise and exits through the roof, creating a vacuum that pulls cooler air from under the foundation. Part of that air is radon, which is an invisible, odorless gas that develops naturally when radioactive particles are deep within the ground. Those particles usually come from decaying matter in soil and rocks.

The Watertown, 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.

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