Top-rated radon detection and reduction specialists.

Get matched with top radon detection and reduction specialists in Knob Noster, MO

Enter your zip and get matched with up to 5 pros

Need a pro for your radon detection and reduction project in Knob Noster, MO?

Select your specific project to find the pro for you.

Verified Reviews for Radon Detection And Reduction pros in Knob Noster, MO

*The Angi rating for Radon Detection And Reduction companies in Knob Noster, MO 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 Knob Noster, MO 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 January 17, 2026

Find Radon detection and reduction specialists in Knob Noster

Avatar for ATM Home Inspection, LLC

ATM Home Inspection, LLC

4.95(
38
)
•Approved Pro

ATM Home Inspection, LLC

4.95(
38
)
•Approved Pro
Customers say: Quality work
Recommended by 97% of Angi customers
Recommended by 97% of HomeAdvisor customers
15 years of experience

Now you can put our outstanding reputation for service and reliability to work for you. By using ATM Home Inspection, LLC, you benefit from experienced inspectors that deliver reports that meet or exceed the state standards. We also encourage your presence during the inspection. By being present at the inspection, our professional inspector can familiarize you with the home, and explain things to you as they move through the house. Ensuring that your home is safe from contaminants is vital to your peace of mind and health. Our experts not only provide home and building inspection services but we also help you protect your home from things such as mold, termites and radon gas. View our categories below to learn more about what we have to offer. You may also contact us today 18168860186 to speak with a member of our trained staff. ATMhomeinspection.com

"Time will tell but seemed knowledgeable, they were very informative for us during the inspection and before and their report is well laid out with all that they reviewed including relevant pictures (with arrows, circles on important parts)."

Matthew M on July 2025

Now you can put our outstanding reputation for service and reliability to work for you. By using ATM Home Inspection, LLC, you benefit from experienced inspectors that deliver reports that meet or exceed the state standards. We also encourage your presence during the inspection. By being present at the inspection, our professional inspector can familiarize you with the home, and explain things to you as they move through the house. Ensuring that your home is safe from contaminants is vital to your peace of mind and health. Our experts not only provide home and building inspection services but we also help you protect your home from things such as mold, termites and radon gas. View our categories below to learn more about what we have to offer. You may also contact us today 18168860186 to speak with a member of our trained staff. ATMhomeinspection.com

"Time will tell but seemed knowledgeable, they were very informative for us during the inspection and before and their report is well laid out with all that they reviewed including relevant pictures (with arrows, circles on important parts)."

Matthew M on July 2025

Avatar for Environmental Testing & Research Laboratories, Inc

Environmental Testing & Research Laboratories, Inc

4.85(
347
)

Environmental Testing & Research Laboratories, Inc

4.85(
347
)
Customers say: True professional
Recommended by 93% of Angi customers
Recommended by 93% of HomeAdvisor customers

ETR Laboratories in an analytic laboratory with a broad range of commercial, industrial and individual clients. We provide analytic services using a wide variety of scientific methods including GC/MS, IC/MS, GIR, NMR and SEM equipment. We can do particle analysis, organic and inorganic chemical analysis and micro analysis on biological and other materials. Private water analysis is our specialty. Award winning. Additional DBA - Environmental Testing & Research Laboratories Inc, ETR Labs, ETR Laboratories.

"as advertised"

Nancy C on July 2018

ETR Laboratories in an analytic laboratory with a broad range of commercial, industrial and individual clients. We provide analytic services using a wide variety of scientific methods including GC/MS, IC/MS, GIR, NMR and SEM equipment. We can do particle analysis, organic and inorganic chemical analysis and micro analysis on biological and other materials. Private water analysis is our specialty. Award winning. Additional DBA - Environmental Testing & Research Laboratories Inc, ETR Labs, ETR Laboratories.

"as advertised"

Nancy C on July 2018

Copeland's Home Inspections LLC

4.93(
29
)

Copeland's Home Inspections LLC

4.93(
29
)
Customers say: Quick response
Recommended by 96% of Angi customers
Recommended by 96% of HomeAdvisor customers

Individuals looking for a person with integrity, compassion, and experience need look no further. The combination of “real life” experience and field related certifications make this gentleman an invaluable asset to any real estate team.

Individuals looking for a person with integrity, compassion, and experience need look no further. The combination of “real life” experience and field related certifications make this gentleman an invaluable asset to any real estate team.

Pure Air Of The Ozarks

4.86(
7
)

Pure Air Of The Ozarks

4.86(
7
)
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers

Our cutting-edge Dry Fog technology is the leading solution for homeowners and businesses alike, as it is widely used across many industries in eliminating mold. Mold is indiscriminate as to where and what types of facilities it affects. Our process was developed so that it can be applied anywhere and everywhere mold appears without requiring demolition, toxic chemicals, significant cost or down-time. Regular business hours are Monday through Friday from 8am to 5pm. Weekends and evenings can be arranged as needed by appointment.

"Rescheduled a few times but was kind and got the job done"

Shanna R on January 2024

Our cutting-edge Dry Fog technology is the leading solution for homeowners and businesses alike, as it is widely used across many industries in eliminating mold. Mold is indiscriminate as to where and what types of facilities it affects. Our process was developed so that it can be applied anywhere and everywhere mold appears without requiring demolition, toxic chemicals, significant cost or down-time. Regular business hours are Monday through Friday from 8am to 5pm. Weekends and evenings can be arranged as needed by appointment.

"Rescheduled a few times but was kind and got the job done"

Shanna R on January 2024

Haulotte Construction Services

5.00(
2
)

Haulotte Construction Services

5.00(
2
)
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers

We also offer whole home inspections ( Building process, New home, Pre-owned home) and septic/sewer inspections and evaluations for real estate transactions. Water quality testing is included with septic/sewer evaluations and inspections

We also offer whole home inspections ( Building process, New home, Pre-owned home) and septic/sewer inspections and evaluations for real estate transactions. Water quality testing is included with septic/sewer evaluations and inspections

Avatar for Show Me Home & Building Inspections

Show Me Home & Building Inspections

5.00(
2
)

Show Me Home & Building Inspections

5.00(
2
)
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers

When it comes to home and building inspections, there’s no one better to turn to than Show Me Home and Building Inspections. My services include residential inspections, 4-point inspections, commercial inspections and radon testing. I’m a certified, independent home and building inspector, who cares about your investments. I'll work with you to make sure you understand all the details of my findings about your property and that you have all the information you need about the condition of the property to make your investment.

"Milton Wright was the most courteous, thorough, and affordable building inspector. I don't think you could find a better one if you searched all day! Nick and Marilyn Nivert"

nick n on May 2021

When it comes to home and building inspections, there’s no one better to turn to than Show Me Home and Building Inspections. My services include residential inspections, 4-point inspections, commercial inspections and radon testing. I’m a certified, independent home and building inspector, who cares about your investments. I'll work with you to make sure you understand all the details of my findings about your property and that you have all the information you need about the condition of the property to make your investment.

"Milton Wright was the most courteous, thorough, and affordable building inspector. I don't think you could find a better one if you searched all day! Nick and Marilyn Nivert"

nick n on May 2021

Showing 1-10 of 11
Radon Detection and Reduction questions, answered by experts

To determine whether you have radon in your home, you must run a test. Radon gas has no odor or color, so you won’t notice a concentration of radon. You could purchase a DIY test at a local hardware store, but it may not deliver completely trustworthy results. The best way to test and receive accurate results is to hire a local radon detection specialist.

Installing a mitigation system reduces radon levels, which can cause lung cancer, providing peace of mind and long-term health benefits. It can also increase your home’s value, as many buyers prefer properties with radon safety measures in place. The investment is relatively low compared to the potential health risks associated with prolonged radon exposure.

No level of radon is technically safe, but because it’s everywhere—even in the air outside—it’s impossible to avoid entirely. Instead, the Environmental Protection Agency encourages taking preventative measures if the levels of radon in your home rise above 2 pCi/L. (For reference, the average radon level in homes across the United States is 1.3 pCi/L.

Avoid opening windows and keep doors closed during testing to obtain accurate readings.

Sampling typically takes 1-3 hours, and depending on the provider, lab results are available within 2-7 days.

The Knob Noster, MO 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

What do you need done? We’ll find top pros.
  • 🌱 "Mow a small front yard"
  • 🛠 "Fix a leaking pipe under the sink"
  • 🏠 "Repair shingles on an asphalt roof"