Home/Study Guides/Complete Guide Set
Every section of the exam. Six guides, one price.
One study guide for each of the six NCEES knowledge areas, 348 pages and 118 worked examples in all, for $129 instead of $174 bought separately. Written for the Principles and Practice of Engineering (PE) Environmental exam from the National Council of Examiners for Engineering and Surveying (NCEES), to the April 2026 specification.
A comprehensive prep course runs $1,600 to $2,800.
348 pages · 118 worked examples · 46 Field Notes
One guide per section. Open any for details.
Section 1 · 1A, 1B, and 1D
Drinking Water & Water Resources
62 pages · 24 worked examples · 8 Field Notes
What's inside →
Section 1 · 1A and 1C
Wastewater Treatment & Collection
52 pages · 14 worked examples · 8 Field Notes
What's inside →
Section 2 · 2A, 2B, and 2C
Solid & Hazardous Waste
47 pages · 19 worked examples · 8 Field Notes
What's inside →
Sections 3 and 6 · 3A, 3B, 6A, and 6B
Sustainability, Health & Safety
57 pages · 22 worked examples · 7 Field Notes
What's inside →
Section 4 · 4A and 4B
Air Quality & Pollution Control
77 pages · 22 worked examples · 7 Field Notes
What's inside →
Section 5 · 5A and 5B
Site Assessment & Remediation
53 pages · 17 worked examples · 8 Field Notes
What's inside →
Every topic, built the same way.
Each guide follows the same structure, so moving from one section to the next costs you no time.
01 · Concept
The key idea
What the exam is testing on the topic, stated plainly.
02 · Formula
Equations with units
Every variable defined, with the handbook page where the formula appears, or a note that you have to memorize it.
03 · Example
Worked in exam style
A full worked example in the multiple-choice format the exam uses, with the arithmetic shown.
04 · Mistakes
Where points are lost
The errors that cost candidates points on that topic, named so you can catch them.
And in the back of every guide
- Exam strategy for the section. Question count and weight, the calculation-versus-conceptual split, common traps, and what the handbook gives you.
- Regulatory and qualitative quick reference. The rules, limits, and distinctions the section tests, in tables, to support success on the qualitative questions.
- Key formulas summary. Every equation in the guide, grouped by topic, with unit conversions.
- Self-assessment checklist. Check off each subtopic as you master it.
Matt Bentley, PhD, PE
Environmental engineer, university instructor, and Technical Director at a water treatment chemical company in Colorado. Passed the Environmental PE in February 2026, on the first try, in under 80 hours. He wrote these guides from the materials he wished had existed when he was preparing.
All 80 questions, one set of guides.
348 pages · 118 worked examples
Common questions
What is included?
The Complete Guide Set includes all six Confluence study guides: Drinking Water & Water Resources, Wastewater Treatment & Collection, Solid & Hazardous Waste, Sustainability, Health & Safety, Air Quality & Pollution Control, and Site Assessment & Remediation. Together they cover all six sections of the April 2026 NCEES specification. $129, a saving of $45.
What format are the guides in?
PDFs, 348 pages in all, downloaded immediately after checkout through Gumroad. Each guide prints cleanly.
Are the guides written to the April 2026 NCEES specification?
Yes. Every guide was written to the April 2026 computer-based testing (CBT) specification from the first draft. See what changed in 2026.
Do I need every guide?
Not necessarily. If you already know your weak areas, buy those guides at $29 each. The set is the better price once you need four or more of the six, and it is the simplest option if you are starting from scratch. The practice exam ranks your seven reporting areas if you are not sure.
I already own one of the guides. Should I buy the bundle?
Buy the guides you are missing individually instead, at $29 each. A bundle would sell you a guide you already have.
Can I get a refund?
Because the products are digital downloads delivered immediately, sales are generally final. If something is wrong with a purchase, email matt@confluencepeprep.com and we will work with you to resolve it.