Client Feedback: CIH Exam Courses

We love getting honest feedback from our clients. In addition to letting us know how we are doing, they let us know what worked or didn't work for them while preparing for their CIH exam.

Read on to find out more.

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November 24, 2018
Finally got the message…congrats….preliminary results! Thank you for your encouragement through the years. I am a much stronger person because of this process. I’m encouraging my daughter to take your course!


November 24, 2018
I am happy and so relieved to report that I sat for the CIH exam today and received a preliminary pass! Such a huge relief! Thank you to everyone at Bowen but most especially Russ! You were a source of inspiration when I really thought I could not do it! I am recommending the course to everyone I know!!!


November 13, 2018
I completed my exam yesterday and am happy to report I received a preliminary pass on my first try; what a relief! I listened to the lectures at least twice, looked up information on workplace environments (YouTube videos are helpful), and I had tons of flashcards on every subject, but focused on toxicology, epidemiology, and ventilation. I also purchased the book Industrial-Occupational Hygiene Calculation: A Professional Reference by Stewart et al. Even though it has errors in the book, I found it to be extremely helpful in understanding the equations. I probably read through it 4 or 5 times. It really is a good idea to skip the math problems until the end. I was able to complete all the word problems, go back through the exam and complete the math problems, and run through all of them one more time in each 2.5-hour session. Thank you to Russ and the Bowen’s team.


November 5, 2018
Finished taking my CIH test today and received a preliminary pass! A lot of the comments I have been reading I found useful. What I will say is if you follow the rubric and study what your predecessors are telling you, may be a good idea and you should be fine. I put in between 2-3 hours a day for 8 weeks, and prior to that, I spent weekdays studying. Bowen quiz and practice questions have been invaluable to my progress. I also used the ACGIH IH calculations book, Quantitative IH book by Jack C ACGIH (great book, just doesn't present the questions in the same format as Bowen), did not use Datachem. If you understand how to manipulate the equations and have a good understanding of algebra I think you will do just fine on the math portion. At the end of the day, it's what we put into it that matter, you put the work in or you don't. Prepare like it's something you will only do once and you will be rewarded.  Thanks for everything Russ, I don't think I would have been as prepared as I would if not for your entire platform: class, study guides, quizzes, references, etc. 


October 30, 2018
I just took the CIH exam and got a preliminary pass. Here is my take on it. I think the Bowen course is great and if you are very familiar and comfortable with it you would be fine. I had also studied with Datachem and I think it is not really useful because the questions are much more complicated than the test. I feel like the calculations are very simple in the test. If I had to study for it again I would concentrate on the TLV book, toxicology and the Bowen course.Good Luck to everyone taking it in November!


October 29, 2018
I took the CIH exam today and got that green checkmark! Thank you, Russ, for once again playing such a key role in my success! Thanks to you I've passed the ASP, CSP, and CIH all on the first pass. As others have done, I'll leave a few things for those who will be taking the exam soon...I spent about 4 months studying ~2 hours/day. I took the Bowen CIH mini (50 question) exam about 20 times during my 4 months and averaged low 80s. I took dozens of the 5-question exams in chem/basic science and radiation (my weak points). In retrospect, I wish I hadn't spent so much time studying the really difficult math problems since I found that the actual exam math problems were fairly straight-forward. I found the William Burgess book "Recognition of Health Hazards in Industry" to be extremely helpful. I didn't bother with the nitty-gritty within the book and only took out those golden nuggets that highlighted important information for the hygienist and seemed like good exam questions. I accompanied this book by watching YouTube videos on various processes like electroplating, iron and steel production, semiconductor production, degreasing, etc. I also used Quizlet CIH Tox cards that others have made. Good luck everyone! You can do this!


October 12, 2018
I just finished taking the CIH exam today, and boy was I relieved/excited/overwhelmed to see the big green circle indicating a preliminary pass, especially since this was my first time taking it. Thank you to the entire Bowen team, and more importantly, to all the users for their input in forums, past study sessions, etc. All of it was beneficial and instrumental to my success today. I wish everyone else all the best of luck.


October 1, 2018
I passed (the CIH exam)! Thank you so much for making this possible. This was my 2nd attempt overall, but the first attempt after taking your CIH Review Course. After failing the first time, I knew I needed more work on Toxicology and Ventilation. I found the TLV/BEI book and the ACGIH Ventilation Manual to be very helpful. I also watched a lot of YouTube videos to learn about different processes. The course also helped me strengthen my strengths. Thanks again!


June 3, 2018
It is indeed a tough test! I used DataChem CIH software religiously every day for almost a year, for at least 2 hours a day. Take practice tests. I printed out the Bowen CIH questions and put them onto flash cards. I played the Bowen CIH game 2 to 4x a day; strive for 100%. I purchased the AIHA "Industrial Hygiene Reference and Study Guide. Read this book every chance you get and memorize the content, as much as you can. Know this book and Ace the test!! I took the Bowen online CIH class and then immediately took the classroom CIH version. Difficult topics become more transparent in the classroom. Read the ACGIH TLV book; know the TLV's of common toxicants [benzene, lead, etc] but read [and re-read] the Definitions and Notations section!!!! Know your strengths and weaknesses. My strengths were chemistry, noise, bio-hazards, and PPE; my weaknesses were radiation and ventilation. Bowen will help with both of these topics. I passed ASP, CSP and CIH first time because I was extremely well prepared. I used Bowen for all three tests. It is the Boy Scout motto: Be Prepared!!!!!!!!!!


May 17, 2018
I passed! :) I cannot emphasize enough how valuable Bowen has been throughout the past few months (both the class and the premium resources). Although I took the CIH prep class in the summer of 2016, I didn’t actually start studying/preparing until January of this year and I can’t imagine how much more challenging it would have been without these resources to help keep me on track! Russ, thank you so much for putting together such a great course and study materials that made such a massive challenge be achievable and also for making me a better IH! Thanks also to Rick and Otto if they’re still out there! :)


May 15, 2018
Thank you so much, Russ. I remember having some hesitation before signing up due to cost. I had already spent several hundred dollars on application fees, resources, and Datachem access. But in hindsight, your course was worth it! The study materials, quizzes, app, etc was my go-to for about 70% of my study time. If others ask, I will strongly recommend your course. It helps with the consolidation of resources and helps maximize your study time. One CIH recommended that I read Fundamentals of Industrial Hygiene cover-to-cover but I rarely learn that way. Thanks again!


December 4, 2017
I posted before that I passed. What I didn't say was that this was my fourth attempt. My first was in 1996. That's right, when it was a two-day exam in a giant ballroom full of tables and people. I did not prepare very well (cocky) and did not fair well (oops). I was so upset that my next attempt was in 2006. Again I thought I now had 10 more years of experience and it was only a "short" exam on a computer now... how hard could it be... HARD!!!! Again scored a 64 with 66 being a passing score. Had I matured over the years? Of course..... not.... my next attempt was 2016. This time I knew it would be hard and I planned to study. I took a one-week crash course cram session three months before the exam. After the class, I realized how much I didn't know and the class offered no continuing support. I tried to study on my own, and three weeks before my exam date I had an emergency appendectomy and ended up scoring a 65, with passing being again 66. UGH!!!!! Then I was introduced to BOWEN. Here the class work being spread out over the 8-week period allowing for study, practice, questions, and commiseration with all of you and fostered a great atmosphere to prepare. Russ gave great advice on how to prepare and what to study.. You won't learn it by osmosis, you have to work at it. but the class structure, continuing study sessions, forums, practice questions, etc. gave me exactly what I needed to prepare, work hard, talk to you great people, and finally PASS!!!! THANK YOU ALL!!!!  and for those who didn't make it this time.... take it from me, you will make it. Just don't wait 10 years till your next attempt.