Radon mitigation in Iowa City, Coralville, Cedar Rapids and surrounding areas.

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Professional Radon Mitigation Experts.

Your Mitigation and Gas Reduction Experts

REP was started by a couple entrepreneurs in West Liberty, IA in 2006 and has grown into a successful small business that serves the radon mitigation needs of Eastern Iowa in numerous communities (including Iowa City, Coralville, Cedar Rapids, Washington, Muscatine, etc.) with a daily focus on customer service.

The business has evolved from a small operation out of a garage, to a business with a commercial shop/storefront in Solon, IA (as of 2015) that houses a fleet of vehicles and equipment to quickly meet the radon needs for local Iowans.

REP is credentialed through the state of Iowa and fully insured. REP also holds certification through the American Association of Radon Scientists & Technologists - National Radon Proficiency Programs (AARST NNRP) for multi-family dwellings as well and is actively pursuing certification for commercial properties.

REP has two-state certified radon mitigation specialists - John Farlinger (M00072) and Joe Sullivan (M00164).


John Farlinger

Owner, Certified Mitigator
John Farlinger started the Radon business in 2006 after becoming a state-certified Radon Mitigator. John grew up in West Liberty, Iowa where he was actively involved with the businesses his entrepreneurial parents owned and operated. John later graduated from City High in Iowa City and moved to Highland, Kansas to earn his associates degree while running cross country and track. John then attended Simpson College to complete his bachelor’s degree in Business Management where he began his career in the banking industry. After moving back to the Iowa City area, John found his way into radon through his father’s construction business and quickly applied his management degree to starting a new business When “Radon John” isn’t fighting radon, you can find him on the golf course, playing outside with his kids, biking, boating, or watching the Iowa Hawkeyes, Minnesota Vikings or St. Louis Cardinals.

Joe Sullivan

Certified Mitigator
Joe Sullivan began his working career at the age of 14, when he became employed at the local Hy-Vee grocery store in Atlantic, Iowa. He spent the next eight years with the company, in a variety of positions, from bag-boy to department management. It was here that Joe learned the importance of courtesy and customer service. In 2008, Joe moved to Iowa City to attend the University of Iowa. A position with a local roofing company led to his discovery of a passion for construction and hands-on labor. Not wanting to be unemployed for part of the year, roofing being a seasonal profession, he sought out a part-time winter position. It was then that he was introduced to John Farlinger, who was happy to receive a helping-hand at REP in the coldest part of the year. Joe quickly attained an understanding of radon, the risk it presents, and its methods of management and mitigation. He became state certified in 2015, and has been utilizing his skills in construction and customer service to provide an enjoyable and satisfying experience for each client ever since.

Shane Pulliam

Radon Technician
Shane was born and raised in eastern Iowa. He has many years of work experience under his belt in the construction field and various other trades. The skills acquired from these years made for a perfect fit in radon mitigation. A true artist at heart Shane enjoys sketching and drawing in his free time, with many passion projects in the works.  Utilizing this natural creativity, Shane brings an open mind to any problems that may arise, always finding a solution.

Hector Ortiz

Radon Technician
Hector Ortiz is from West Liberty, IA. He has worked in the construction industry for over 10 years. He has several years of experience in roofing, framing and operating heavy equipment. Hector “Juni” is a car enthusiast and an avid sports fan – cheering regularly for the Iowa Hawkeyes and San Francisco Fourty-Niners. In his spare time, he can be found on the golf course, fishing or participating in local sports (volleyball, football and slow pitch softball).

Radon is a chemical element with symbol Rn and atomic number 86. It is a radioactive, colorless, odorless, tasteless noble gas.


If your first test has a result between 4 and 8 pCi/L, you have the choice of testing again. If results are needed quickly, you can re-test with a short-term (2-7 days) device.


Radon mitigation is any process used to reduce radon gas concentrations in the breathing zones of occupied buildings.



John and his Team of Professionals always go above and beyond to do an exceptional job and to exceed the industry standards to make every home have safe radon levels!! Highly recommend them every time we need services for radon mitigation!! It's the only call I would make!!


Mike Graf

Graf Home Selling Team


Thank you so much for doing such a great job installing the mitigation systems for our clients over the years. You are always very professional & responsive to clients questions & we really appreciate your knowledge & experience!


Jill Armstrong

Skogman Realty


Thank you REP (Radon Elimination Professionals) and Radon “John” for always being quick to respond and getting estimates for both interior and exterior mitigation systems for my clients whether they’re buyers or sellers. Sure makes my job easier. Including your testing results as part of the estimate is wonderful. One stop shop!


Tim Lehman

Coldwell Banker


Radon John. Incredible Service. Will meet any deadline. Totally Professional.

Never a worry about how he leaves a job site after the work is completed.


Gary R. Doerrfeld

Coldwell Banker


John and the team at REP are hands down the best Radon professionals I've ever worked with.  They work diligently to make sure their product and service is top notch, at the same time their pricing is very fair.  If you want it done right the first time, REP is the only call to make.


Jerad Kilburg

Urban Acres Real Estate


Radon Elimination Professionals is a top notch company to work with!  They are qualified, experienced, and very efficient to work with.  I recommend them to all of my clients needing mitigation as I know they will be in good hands with "Radon John".


Katie Chalupa

Skogman Realty


Radon John does outstanding work, and is always ready to help out with any and all radon issues a home might have. Kelley and I have used him dozens of times for our Buyers and Sellers, and referred him to many other friends and fellow Realtors. His bids are always in line with the final price, and his work is second to none.



David Moore

Ruhl & Ruhl Realtors