ABOUT US
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.
In Illinois it is illegal for the mitigation and testing company to do both the testing and repair of radon at the same home.
The EPA says: Be aware that there is potential conflict of interest if you use the same company to conduct both the test and the radon mitigation of the home.