Top-rated radon detection and reduction specialists.

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Avatar for American Waterworks

American Waterworks

1307 Valleyhigh Dr NW
4.78(
132
)
•Approved Pro

American Waterworks

1307 Valleyhigh Dr NW
4.78(
132
)
•Approved Pro
Super Service Award
Customers say: True professional
Recommended by 93% of Angi customers
Recommended by 93% of HomeAdvisor customers
629 local quotes requested

When it comes to water in your basement or a faulty foundation, you need an expert to ensure the damage is reversed and prevented from occurring in the future. American Waterworks has several decades of experience in the basement waterproofing and foundation repair industries, and we know the best tools and techniques to see your home through its troubles. Our professional installers are experienced in solving the wide variety of problems that allow water into basements and other areas below ground level. We've helped property owners with thousands of repairs and other restorations to homes in Minnesota, North Dakota, northeastern Iowa and western Wisconsin. American Waterworks is ready to serve all of your basement, crawl space, foundation, concrete leveling and radon mitigation needs. Call us today for a free estimate!

"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."

Donna A on September 2025

When it comes to water in your basement or a faulty foundation, you need an expert to ensure the damage is reversed and prevented from occurring in the future. American Waterworks has several decades of experience in the basement waterproofing and foundation repair industries, and we know the best tools and techniques to see your home through its troubles. Our professional installers are experienced in solving the wide variety of problems that allow water into basements and other areas below ground level. We've helped property owners with thousands of repairs and other restorations to homes in Minnesota, North Dakota, northeastern Iowa and western Wisconsin. American Waterworks is ready to serve all of your basement, crawl space, foundation, concrete leveling and radon mitigation needs. Call us today for a free estimate!

"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."

Donna A on September 2025

Avatar for River Cities Radon

River Cities Radon

3500 Riverview Circle
5.00(
6
)
•Approved Pro

River Cities Radon

3500 Riverview Circle
5.00(
6
)
•Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
11 local quotes requested

River Cities Radon is a locally owned and operated company that values honesty and integrity in all aspects of our business. Our dedicated team of professionals have over 14 years of hands on experience, to provide innovative ideas and suggestions tailored to your projects. Our services are customized to your individual needs, paying close attention to the details of each project that we are involved with. Please feel free to contact us today!

"Very friendly did a.great job"

ALAN S on May 2024

River Cities Radon is a locally owned and operated company that values honesty and integrity in all aspects of our business. Our dedicated team of professionals have over 14 years of hands on experience, to provide innovative ideas and suggestions tailored to your projects. Our services are customized to your individual needs, paying close attention to the details of each project that we are involved with. Please feel free to contact us today!

"Very friendly did a.great job"

ALAN S on May 2024

Bison Inspections

No reviews yet

Bison Inspections

No reviews yet

Bison Inspection Services offers comprehensive home inspections and radon testing. We provide a thorough evaluation of the home's structural components and systems. We will assess your roof, lots and grounds, heating and cooling, plumbing, electrical, certain appliances, water and sewage. We will also look for and inform you of any possible health hazards that we find during your home inspection. We serve Fargo North Dakota and its surrounding areas.

Bison Inspection Services offers comprehensive home inspections and radon testing. We provide a thorough evaluation of the home's structural components and systems. We will assess your roof, lots and grounds, heating and cooling, plumbing, electrical, certain appliances, water and sewage. We will also look for and inform you of any possible health hazards that we find during your home inspection. We serve Fargo North Dakota and its surrounding areas.

American Waterworks

4119 14TH AVE N
5.00(
8
)

American Waterworks

4119 14TH AVE N
5.00(
8
)
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers

When it comes to water in your basement or a faulty foundation, you need an expert to ensure the damage is reversed and prevented from occurring in the future. American Waterworks has several decades of experience in the basement waterproofing and foundation repair industries, and we know the best tools and techniques to see your home through its troubles. Our professional installers are experienced in solving the wide variety of problems that allow water into basements and other areas below ground level. We've helped property owners with thousands of repairs and other restorations to homes in Minnesota, North Dakota, northeastern Iowa and western Wisconsin. American Waterworks is ready to serve all of your basement, crawl space, foundation, concrete leveling and radon mitigation needs. Call us today for a free estimate!

"Great service!"

Nate E on April 2021

When it comes to water in your basement or a faulty foundation, you need an expert to ensure the damage is reversed and prevented from occurring in the future. American Waterworks has several decades of experience in the basement waterproofing and foundation repair industries, and we know the best tools and techniques to see your home through its troubles. Our professional installers are experienced in solving the wide variety of problems that allow water into basements and other areas below ground level. We've helped property owners with thousands of repairs and other restorations to homes in Minnesota, North Dakota, northeastern Iowa and western Wisconsin. American Waterworks is ready to serve all of your basement, crawl space, foundation, concrete leveling and radon mitigation needs. Call us today for a free estimate!

"Great service!"

Nate E on April 2021

Horizon Inspections

3007 17th Ave S
No reviews yet

Horizon Inspections

3007 17th Ave S
No reviews yet
6 years of experience

With 30+ yrs experience in almost every aspect of construction, Chris brings his invaluable experience to every inspection. ASHI Certified since 2014. Services include Home Inspections for Sellers, Buyers, 1-Year Warranties, and Radon Testing. Serving you within an 80-mile radius of Fargo-Moorhead. Horizon Inspections: your future is our focus!

With 30+ yrs experience in almost every aspect of construction, Chris brings his invaluable experience to every inspection. ASHI Certified since 2014. Services include Home Inspections for Sellers, Buyers, 1-Year Warranties, and Radon Testing. Serving you within an 80-mile radius of Fargo-Moorhead. Horizon Inspections: your future is our focus!

Nordic Companies

3628 Pierce St. S
5.00(
1
)

Nordic Companies

3628 Pierce St. S
5.00(
1
)
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers

Nordic Companies is owned by Lars Knobloch. Nordic Home Inspection and Nordic Environmental offers a variety of services from residential and commercial inspections to testing for radon and mold.

Nordic Companies is owned by Lars Knobloch. Nordic Home Inspection and Nordic Environmental offers a variety of services from residential and commercial inspections to testing for radon and mold.

DJ's Home Inspection Inc

3523 45th St S
5.00(
4
)

DJ's Home Inspection Inc

3523 45th St S
5.00(
4
)
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers

DJ's Home Inspection offers home inspection and radon testing services to Fargo, North Dakota (ND) and the surrounding areas. Please call/text/email for pricing and scheduling information. Thank you!

DJ's Home Inspection offers home inspection and radon testing services to Fargo, North Dakota (ND) and the surrounding areas. Please call/text/email for pricing and scheduling information. Thank you!

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Radon Detection and Reduction questions, answered by experts

You can buy DIY radon test kits from a home improvement store and conduct radon testing, but these tests are often inaccurate. No matter the result, you should supplement DIY testing with professional radon detection and analysis. DIYers only have access to passive radon tests, which aren’t as reliable as active tests that professionals use. Plus, it’s very easy for DIYers to make mistakes during testing, leading to inaccurate results. If you’re moving into a new home, have concerns about radon, or are due for an updated test, hire a professional. 

Costs depend on test type, home size, number of testing locations, and whether follow-up testing is required.

What is radon? It’s a radioactive gas that naturally occurs in the ground, forming as uranium and thorium decay. It has no color or odor, so you don’t know if it’s seeping into your building’s foundation. Regular exposure to radon gas increases your chances of suffering from lung cancer. Radon testing measures the air inside your house for the presence of radon gas. If detected, the test will measure the severity of radon levels in your home’s air.

Costs depend on property size, test types, and additional services like mold sampling.

Since radon typically comes out of the soil, it is most commonly found in the lower levels of a home. In houses with basements, that's a common location for radon. Homes built directly on the ground may have radon on the ground floors. Radon can be found on the upper floors of the home, but often in lower concentrations than in lower levels.

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The Casselton, ND 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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