NBI® Illinois: #1 Radon Testing Services in Chicago & Illinois
NBI® Illinois is the MOST TRUSTED and HIGHEST RATED radon testing company in Chicago and Illinois. We use STATE-OF-THE-ART electronic continuous reading monitors to detect radon levels. The test takes 48 hours and results are known VIRTUALLY IMMEDIATELY.

Why NBI® Illinois is the #1 Choice for Radon Testing
🏆 PROFESSIONAL EPA RADON TESTING
Professional EPA radon testing - the highest standard in the industry.
⚡ FASTEST RESULTS
48-hour testing with immediate results. Get your radon levels when you need them most.
🔬 MOST ADVANCED
State-of-the-art electronic continuous reading monitors with motion and tamper detection for accuracy.
Advanced Radon Testing Technology - MOST ACCURATE RESULTS
Our CERTIFIED RADON INSPECTORS use a monitor that is equipped with motion and tamper detectors to ensure ACCURATE RESULTS every time.
Electronic continuous reading monitors for accurate detection
Comprehensive testing period with immediate results
Monitors equipped with detectors to ensure accurate results
Professionally trained and certified radon inspectors
Understanding Radon Health Risks - THE SILENT KILLER
Radon is a RADIOACTIVE GAS that has been found in homes all over the U.S. You cannot see, taste, or smell radon so testing is the ONLY WAY to find out the levels of radon in a home.
Radon is a radioactive gas found in homes across the U.S.
Second leading cause of lung cancer according to EPA
Cannot see, taste, or smell radon - testing is essential
Enters through cracks and holes in foundation
EPA & Surgeon General Warning - CRITICAL HEALTH RISK
The EPA and Surgeon General say breathing radon is the SECOND LEADING CAUSE OF LUNG CANCER and if you smoke, your risk is even higher.
Critical Information - TESTING IS ESSENTIAL:
How Radon Enters Your Home - KNOW THE ENTRY POINTS
Radon comes from the natural breakdown of uranium in soil, rock, and water and gets into the air in a home through cracks and other holes in the foundation such as sump well.
Entry Points - THERMAL IMAGING CAN HELP DETECT:
Important: Any home can have high levels of radon. This means new and old homes, well-sealed and drafty homes, and homes with or without basements.
Professional Multi-Family Radon Testing - SPECIALIZED EXPERTISE
Multi-Family inspections take a few days, require site access and placing of testing devices in many units. Radon can pose a SIGNIFICANT HEALTH RISK and all major organizations have confirmed this.
Specialized Multi-Family Process - NBI® Illinois EXPERTISE
Coordinate access to multiple units
Strategic placement of testing devices
Multi-day testing period for comprehensive results
Immediate results and detailed reporting
Comprehensive Radon Testing Coverage - ALL PROPERTY TYPES
NBI® Illinois can test for radon in ALL SIZED BUILDINGS. Radon testing is important whether it be a apartment complex, condominium or a multi-family home. All Properties should be tested to ensure they are below action levels.
Single-family residences and multi-family homes
Pre-purchase and pre-sale radon testing
Educational facilities and institutions
Child care centers and facilities
Religious buildings and facilities
Why Choose NBI® Illinois for Radon Testing - THE BEST CHOICE
Professional radon testing services with CERTIFIED INSPECTORS and ADVANCED TECHNOLOGY for accurate results.
Identify and mitigate radon exposure risks
48-hour testing with immediate results
Professional EPA Radon Testing
Specialized testing for apartment complexes and condos
Professional EPA Certification - THE HIGHEST STANDARD
Our radon testing services are backed by PROFESSIONAL CERTIFICATION and training - the gold standard in the industry.
Certification Number
PROFESSIONAL EPA RADON TESTING
Apartments, Schools and Day Care Centers should also be regularly tested for Radon. Testing can easily be performed by an NBI® Illinois inspector who is PROFESSIONALLY TRAINED and CERTIFIED for all inspections including multi-family homes.
Learn More About Radon - EPA RESOURCES
For more information on radon, please visit the EPA's comprehensive resource on radon health risks.

EPA Radon Information
The Environmental Protection Agency provides comprehensive information about radon testing, health risks, and mitigation strategies.
Visit EPA Radon InformationReady for the #1 Radon Testing Service?
Get PROFESSIONAL RADON TESTING with certified inspectors and state-of-the-art equipment for accurate results in 48 hours. Experience the difference that makes NBI® Illinois #1.