Home/Study Guides/Water Bundle
All of Section 1, Water. Both guides, one price.
Water is the largest section on the exam at 19 to 29 of the 80 questions. This bundle covers all of it with both Water guides, 114 pages and 38 worked examples, for $39 instead of $58. 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.
114 pages · 38 worked examples · 16 Field Notes
Two guides, one section. Open any for details.
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.
Water is the largest section. Cover all of it.
114 pages · 38 worked examples
Common questions
What is included?
The Water and Wastewater Bundle includes the Drinking Water & Water Resources Study Guide (Sections 1A, 1B, and 1D) and the Wastewater Treatment & Collection Study Guide (Sections 1A and 1C). Together they cover all of Section 1, Water, in the April 2026 NCEES specification. $39, a saving of $19.
What format are the guides in?
PDFs, 114 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.
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.