Why Choose QET — Quality Environmental Testing
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Testing-Only, No Conflict of Interest. We perform measurements and inspections only—never mitigation—so your results are 100% unbiased.
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Illinois-Licensed & Insured. IEMA-licensed radon measurement professionals, fully insured for residential and real-estate work.
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Fast Turnaround, Clear Reports. Radon tests typically run ~48 hours with same-day reports; mold lab results in 48 hours.
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Pro-Grade Equipment & Labs. Continuous electronic radon monitors; independent accredited labs for air and surface sampling.
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Local Since 2002. Family-owned in Lockport, serving Lemont, Homer Glen, New Lenox, and Chicago’s Southwest Suburbs.
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Serving Area
Lockport, Lemont, Homer Glen, New Lenox, Palos, Orland, Frankfort, Mokena, Plainfield, Joliet, Romeoville, Darien, Burr Ridge, Bolingbrook, Naperville, and several other surrounding Chicagoland communities.
Concerned Homeowner
Real Estate Transactions
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Whether you are in the process of buying or selling a home, or you have recently became aware of the risks of radon or mold , we will help you put your worries at ease. We understand that your family’s health and well-being is a top priority for you. Quality Environmental Testing makes the process extremely easy from the first phone call to set up our testing to recommending a mitigation or abatement solution
Our Radon Testing Process
If you own a home , radon testing is not something you should over look. It only takes 48 hours to run a professional radon test. Quality Environmental Testing Inc. utilizes Continuous Radon Monitors to ensure radon levels are captured hourly for the most accurate results. These are true integrating devices, meaning that they do not bias their results toward the end of a measurement period.
If you are purchasing or selling a home, or require a post-mitigation test, time is critical. In most cases we can start the testing process the next day you inquire about radon testing.
Our Mold Inspection and Testing Process
We offer thorough mold testing to make sure that your home is free of this dangerous substance. Our services include a visual inspection plus a wide variety of sampling services including Mold Spore Air Testing and Swab Testing. These samples are analyzed by certified professional and impartial labs.
We know the signs of mold to watch out for and can track mold back to the source.
About Quality Environmental Testing Inc.
Quality Environmental Testing Inc. (QET) is a family-owned and operated radon and mold measurement company based in Lockport, Illinois, proudly serving the Chicago South and Southwest Suburbs since 2002.
We specialize exclusively in **testing—not mitigation—**so you can trust that our only focus is on delivering accurate, unbiased results that help you make informed decisions about your home or property.
Our team uses state-of-the-art SunRADON continuous radon monitors, which provide precise hourly readings and allow us to generate same-day formal reports—perfect for real-estate transactions where time is critical. Each monitor is calibrated annually to maintain professional accuracy, and all reports are electronically delivered for the fastest turnaround.
For mold testing, we employ advanced mold spore air sampling vacuums along with swab and tape lift methods for visible growth areas. Samples are sent overnight via FedEx to independent, accredited laboratories for impartial analysis. Most results are returned within 48 hours, ensuring you receive clear, actionable information without delay.
With over two decades of local service, QET has built a reputation for precision, professionalism, and integrity. Whether you’re a homeowner, buyer, seller, or real-estate professional, you can count on us to deliver accurate results, prompt service, and honest guidance every time.