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*The Angi rating for Radon Detection And Reduction companies in New Underwood, 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 New Underwood, 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 July 07, 2026

Top-Rated Radon detection and reduction specialists in New Underwood - Updated Nov 2026

Avatar for ALO Radon
ALO Radon
4.9(
29
)
Radon Gas - AbatementRadon Gas - Testing

Serving New Underwood, 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 ."
Our Work
Our Work
Our Work
Our Work
Our Work

+13

Response time3 hrs
Response rate94%
Recommended by92%of homeowners
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Avatar for Rapid Radon Removal
Rapid Radon Removal
5.0(
2
)
Radon Gas - AbatementRadon Gas - Testing

Serving New Underwood, SD and surrounding areas

Approved

In business since 2013

Free estimates

Emergency services offered

"He's extremely knowledgeable and practical, very down to earth. I think he could charge more, his pricing is very good. I would recommend him to anyone and I have already done so."
Response time6 days
Recommended by100%of homeowners
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Avatar for Blackburn Foundation Repair, LLC
Blackburn Foundation Repair, LLC
4.6(
23
)
Radon Gas - AbatementRadon Gas - Testing

Serving New Underwood, 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!!"
Crawl Space Repair
Crawl Space Repair
Response time1 day
91 neighbors recently requested a quote
Recommended by80%of homeowners
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Avatar for Black Hills Radon
Black Hills Radon
New to Angi
Radon Gas - TestingRadon Gas - Abatement

Serving New Underwood, 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.

1 neighbors recently requested a quote
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Radon Detection and Reduction FAQs, answered by experts

No, air purifiers are not an effective way to reduce or remove radon. Radon is a radioactive, inert gas that cannot be filtered by standard air purifiers, which are designed to capture particulates like dust and mold. While an air purifier can improve indoor air quality by removing other pollutants, it should not be relied upon for radon. The only effective solution for high radon levels is a dedicated radon mitigation system.

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.

You'll need to test your home for radon after installing the mitigation system, then again every two years. If radon remains elevated, contact a licensed radon professional, either the contractor who installed the system or a different one, and have them evaluate the system. They may need to make some changes to improve its effectiveness and performance.

Radon is a cancer-causing radioactive gas that poses serious health risks, infiltrating homes through foundation cracks and unnoticed spaces.

The lifespan of a radon mitigation system depends on the type of system and its maintenance. With proper care, a system can last for many decades. Passive systems tend to last longer as they have fewer components that require replacement. Active systems, which have more moving parts like fans, generally have a shorter lifespan. For instance, water filtration devices and active pressurization systems require more frequent maintenance. While the system as a whole is durable, the radon fan in an active system typically has a lifespan of 5 to 10 years and will need to be replaced. As long as the fan is working, the mitigation system should function correctly.

The New Underwood, SD homeowners’ guide to radon detection and reduction services

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