Sat for the Certified Mold Inspector exam last Thursday after about 5 weeks of prep. I've been in environmental inspection work for 6 years but mold specifically has only been maybe 40% of my work, so I wasn't going in completely cold but I also didn't want to assume my field experience would carry me through without studying.
The exam had 100 questions and I had 2 hours. I finished in about 90 minutes and went back through my flagged questions — had about 18 of those. The content split felt like roughly a third sampling methodology, a third interpretation and reporting, and the rest spread across remediation standards, health effects, and regulatory stuff. The health effects questions were more detailed than I expected, particularly around specific mycotoxins and their associated symptoms.
What caught me off guard was how much the exam tested specific standards and guidelines — IICRC S520, EPA guidance, that kind of thing. I'd read through them but hadn't really drilled the specific thresholds and criteria. A few questions came down to knowing exact numbers rather than general concepts, so if you're prepping, don't just skim the standards.
I passed, won't find out the actual score for a few days apparently. But if I were doing it again I'd spend at least a week focused specifically on the sampling methodology section because it showed up more than I anticipated and the questions were the most technical ones on the whole exam.
I took mine about a year ago and the standards-specific questions were exactly what tripped me up on my first pass through the practice material too. Once I went back and actually read the source documents rather than summaries it got a lot clearer. Good write-up.
This is really helpful. I'm scheduled for next month and was planning to mostly rely on my field experience. Sounds like I need to actually sit down with the IICRC S520 and go through it more carefully than I had planned.
The mycotoxin questions get people every time. Aspergillus vs Stachybotrys differences, the conditions each needs to grow, associated health effects — it's worth memorizing that matrix before you go in.
Congrats on passing!
How did you study the sampling methodology section specifically? That's the part I feel weakest on since most of my background is visual assessment and reporting rather than actual sampling protocol design.