Finally passed my DEQ exam after failing twice — here's what worked

by David K. 9 views3 replies
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David K.OP
May 27, 2026

Okay so I've been putting off posting this because I was honestly embarrassed about failing the DEQ twice before finally passing last month. First attempt I went in pretty cold, figured my years of environmental compliance work would carry me. Scored a 68, needed a 75. Second time I bought one of those generic study guides off Amazon and still only hit a 71. Super frustrating.

What actually turned things around was finding a decent DEQ practice test online that mirrored the real question format — specifically the sections on ambient air quality standards and inspection procedures. I'd been glossing over the regulatory citation stuff thinking it wouldn't show up heavily, but it's everywhere on the actual exam. Once I started drilling those questions daily for about three weeks, my practice scores jumped into the low 80s consistently.

Anyone else here studying for DEQ certification right now? Happy to share the study guide breakdown I put together on where the exam actually focuses its weight. The official prep materials are honestly pretty thin on the procedural stuff.

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Carlos B.
May 28, 2026
This is really helpful, thank you for posting. I'm scheduled for my first attempt in six weeks and I've been struggling to find quality DEQ practice test material that actually feels like the real thing. Can I ask — how heavy was the stationary source section compared to mobile emissions? That's where I keep losing points in my practice runs and I can't figure out if I'm overthinking it or genuinely weak there.
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Chris D.
May 28, 2026
Three weeks of daily drilling sounds about right from what I've heard. A lot of people underestimate how much the DEQ exam tests procedural knowledge over raw technical facts. Good on you for sticking with it after two attempts — that takes real persistence.
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Ravi S.
May 28, 2026
I passed mine about eight months ago on the first try but I'll be honest, I probably got lucky on some of the stack testing calculation questions. My biggest exam tip is don't skip the federal vs. state regulatory distinction stuff even if it seems redundant — at least four or five questions on my version hinged entirely on knowing which authority applied. The study guide I used barely touched it.

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