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*The Angi rating for Radon Detection And Reduction companies in Webster, WI 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 Webster, WI 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 21, 2026

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Avatar for American Waterworks
American Waterworks
4.5(
171
)
Radon Gas - AbatementRadon Gas - Testing

Serving Webster, WI 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."
Another Sinking Floor
Dirt Crawlspace in Elk Mound, WI
Concrete stoop had sunk over 6 inches
Foundation Failure Signs
Increased Efficiency of Crawlspace in Elk Mound

+156

Response time4 hrs
632 neighbors recently requested a quote
Recommended by91%of homeowners
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Avatar for Koti-Home, LLC
Koti-Home, LLC
5.0(
2
)
Radon Gas - Testing

Serving Webster, WI and surrounding areas

In business since 2015

Free estimates

Emergency services offered

"Brandon is great! He helped me out when I found myself in a time crunch for getting an inspection. He was very thorough and honest. He even checked out the treehouse in the back yard! I would highly recommend Koti-Home!"
Home Ispected
Response time7 hrs
Recommended by100%of homeowners
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Microbe Guard
1.0(
1
)
Radon Gas - AbatementRadon Gas - Testing

Serving Webster, WI and surrounding areas

In business since 2004

Microbe Guard of Western Wisconsin, LLC has been successfully completing mold remediation projects since 2004; we offer a professional and experienced approach when handling microbial remediation projects. There are thousands of types of mold that occur naturally in our environment. Most are harmless, some cause allergic reactions and others can be toxic enough to create severe health problems in some individuals. Microbe Guard of Western Wisconsin, LLC will help you determine the mold types and concentration levels in your home or workplace with our state of the art testing equipment. The remediation process includes identifying mold, locating and eliminating the source of moisture intrusion, properly containing the affected area from the rest of your home, running HEPA "air scrubber machines," removing and encapsulating mold, and properly disposing of all contaminated materials. Indoor Air Quality is of the most importance to you and your family. Contaminants such as mold can create serious health issues. Microbe Guard of Western Wisconsin, LLC will manage your project from beginning to end with our knowledge and expertise. We look forward to working with you.

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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.

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.

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 cost for a radon mitigation system typically ranges from $800 to $1,500, with an average around $1,000. The final price depends on several factors, including the size of your home, the severity of the radon issue, and the type of system required. Your home's foundation type also significantly impacts the cost. For example, sealing and ventilating an unfinished basement might cost around $4,600, while encapsulating a crawl space without a foundation slab can range from $1,500 to $15,000.

Radon is present almost everywhere but, like sunlight, the concentration levels and how often you are exposed to it have a large part to play in just how dangerous it is. There are levels of radon that are acceptable inside a house, but above a certain limit, radon becomes a serious radioactive hazard that is a known cause of lung cancer. In fact, radon exposure is the number two leading cause of lung cancer (after smoking).

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