New Jersey Radon Cert Exam Question

Hello All!

Business is all up and running finally, however I am not getting much work since I am not yet certified for Radon. I am in the middle of completing the Nachi Advanced Radon Course now, but I was wondering if anyone has taken the NJ Radon Measurement Technician Exam and could tell me just what I should expect.

I can’t find information anywhere on just what this is going to entail. Whether I should be furiously memorizing the formulas for control charts, focusing more on the effects and physics of Radon or maybe the proper operating procedures of the equipment. I am fully aware that a little of each will be on the exam, however I don’t even know if I am going to be presented with figures and asked to solve via formula the Coefficient of Variation or if this is all multiple choice like the majority of the other exams.

If anyone can point me in the right direction it would be greatly appreciated. I feel like this exam is going to be much harder than any of the others i’ve taken so far. Thank you!

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If you’re not yet certified for radon, why don’t you just sub it to RAdata, CEC, or Hera. They’ll do the drop off and pick up.

That’s a really good idea. I do want to be able to advertise that I am certified just to be more competitive but in the interim ill look into them. Thanks!

As posted by Ben…

Suggest that you join your local NJ chapter to help stay abreast of local regulations/news!!

Hey Dave, since it’s been a while since the original post, have you completed radon licensing? I’m in your shoes right now and I was hoping to get some insight if possible since you’ve gone through it recently. I was reviewing the NJDEP website to get info about scheduling the exam and I was looking at the application I’ll need to submit after I pass the test and I was wondering if you have some insight on what I’m looking at. Section B of the application asks for the “name of certified business for which applicant will be a certified measurement technician or specialist” and Section C asks for a letter from that business. What does that mean, since I’ll be an inspector on my own?

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Welcome to our forum, Louis!..enjoy participating. :smile:

Any updates on your end, Louis? I’m looking into radon also and wondering what/how the process is to get certification. Thanks!

Hey Brian,
I found out after taking the exam and failing is that you have to take the interNACHI Advanced Radon course. The course numbers aren’t listed on this site but tucked into a slide at the end of the Advanced course is that the course is the “INACH-1 for Measurement” listed as the accepted course on the NRPP site. As for the “name of certified business for which applicant will be a certified measurement technician or specialist” section on the NJDEP application, you’ll select the lab you’ll be using to send your tests to and you’ll go through a process to be affiliated with them. RAdata in Flanders, NJ has a section on their site for home inspectors and in there they have an online form to fill out to affiliated.

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Thanks for the info and lab recommendation. Sorry to hear you had trouble getting squared away with the right course at first, but I hope it worked out!

Read this interesting tidbit while studying…

Ҥ 7:28-27.28. Reporting requirements
(a) A certified radon measurement business shall submit to the Department by the first day of
each month the results of all radon and radon progeny measurements performed during the
second previous month. For example, the results from May testing are to be submitted by July 1.”

Seems like this applies to us, but it doesn’t say where we’re supposed to submit the results…skywriter perhaps?

…and here’s another headscratcher…

“2. Upon completion of the final mitigation system installation…if this test is at or below 4 pCi/l the mitigation is deemed effective…”

Since when is AT 4 considered acceptable? Everything I’ve read up until that point says at 4 means to take mitigation action.

New Jersey makes their own Standards.

US EPA says this…


I’m not in NJ but just to give you a comparison, in MN we are required to upload our results to the state quarterly. We have an online form on the state website where you can upload each test one-by-one as you do them, or we can upload a bulk spreadsheet at the end of each quarter. They collect the address of the test, type of test (initial, real estate transaction, post mitigation, etc.), the average reading, type of home, what equipment you used, etc.

So my suggestion would be to check the NJ radon licensing website, if they have one, for a location to report your results.


Sooo yeah the first round of the NJ radon test did NOT go as planned on my end. Have to try again in 30 days. That’s the worst part to be honest…having to wait a month before retaking. If this scenario has happened to anyone else (sorry to hear first of all) do you recall if they give you the same test, or are there different versions? I can’t believe how nitpicky it was!

Brian; Like Ryan, I’m in MN, a licensed state. We had to pass the NRSB exam, which was tough. I did it by taking an intense two-day course and immediately took the test. The test is proctored. I left the test not sure I even passed, but thankfully I did. Although the instructors do not see the test, they do know what terminology and formulas that we most likely should know. One instructor gave us access to an online set of flashcards to help with memorization. For me the fee for the class was worthwhile. The NACHI course gets you started, but the NRSB test takes it up a notch or three.


I agree with Michael. The test was tough. Some of the questions/answers seemed to be worded in a confusing, almost tricky way. There were also questions about items I didn’t recall seeing in any of the study material. I spent weeks going over material I had, including the NACHI course, had half a notebook filled with notes which I basically memorized, and passed the test but not by a super-comfortable margin.

Mine was proctored online so it was kinda funny. I had to lift up my notebook computer and pan the built-in camera around the room a few times for the proctor to view my surroundings. Then I had to point it at my desk to show her all I had was blank note paper and a pen. About 10 minutes into the test she asked me to take my hat off, lol. I think because I kept putting my head down a bit to think and she thought I was reading notes off the bill of my hat. At the end, I had to tear up my note paper in front of the camera. They weren’t messing around, lol.


Thank you, @msenty and @ruecker. I’m glad you both passed and put it in the rearview mirror. I also appreciate the insights and suggestions from your experiences!