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Verified Reviews for Radon Detection And Reduction pros in Grayville, IL

*The Angi rating for Radon Detection And Reduction companies in Grayville, IL 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 Grayville, IL 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 20, 2026

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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

NATIONAL INSPECTION SVC OF IN

4.38(
8
)

NATIONAL INSPECTION SVC OF IN

4.38(
8
)
Customers say: Quick response
32 years of experience

National Inspection Service of Indiana, Inc. is a family owned and operated business that began performing residential and commercial inspections almost twenty years ago. The business started in Terre Haute, Indiana in 1992 and expanded to Evansville, Indiana in 1994. We have been providing quality, unbiased inspections for both buyers and sellers throughout central and southern Indiana. Our company is dedicated to providing you with valuable information about your new home. We perform thorough whole house inspections of all major components of the subject property to expose unknown defects and advise you about future maintenance for your home once the purchase is complete. Our company will give you the information you require to make informed decisions.

National Inspection Service of Indiana, Inc. is a family owned and operated business that began performing residential and commercial inspections almost twenty years ago. The business started in Terre Haute, Indiana in 1992 and expanded to Evansville, Indiana in 1994. We have been providing quality, unbiased inspections for both buyers and sellers throughout central and southern Indiana. Our company is dedicated to providing you with valuable information about your new home. We perform thorough whole house inspections of all major components of the subject property to expose unknown defects and advise you about future maintenance for your home once the purchase is complete. Our company will give you the information you require to make informed decisions.

Radon Detection and Reduction questions, answered by experts

Properties should ideally be tested for radon every 2 to 5 years or sooner when changes to the property structure or ventilation occur that might impact airflow.

DIY radon detection is possible using over-the-counter test kits, but professional testing can provide more accurate assessments, especially in cases of high initial readings.

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 testing costs around $450 on average, but you could pay between $150 and $800 for testing, depending on a few factors. The size of your house is one of the most significant cost factors, as your radon professional will have to set up additional tests for homes with larger footprints. The type of test can also have an impact on the cost. Finally, some radon testing companies will include a recommended protocol for radon mitigation, while others might charge $50 to $100 extra.

In most states, radon testing companies don’t need to be licensed or certified by the state, but the companies that analyze the test results and develop radon mitigation protocols do. You should choose a radon testing company that suits your needs, but before hiring a mitigation specialist, check our state licensing tool to make sure the company is properly certified.

The Grayville, IL 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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