Wastewater Operator Study Guide 2026-2027: Proven Strategies for Treatment Plant Operator Certification | Covers Activated Sludge, Troubleshooting, Sludge Management—with 6 Full Practice Exams

MOST WASTEWATER OPERATORS WHO FAIL THEIR CERTIFICATION EXAM WERE NOT UNDERSKILLED. THEY WERE UNDERPREPARED. THIS BOOK FIXES THAT — COMPLETELY.

Every municipal utility in America runs on certified operators. Every NPDES permit, every biosolids land application, every nutrient removal system, every discharge that touches a receiving water body is the legal responsibility of a licensed professional. The certification exam standing between you and that license is not a formality — it is a rigorous, technically demanding assessment that covers thirteen knowledge domains, from activated sludge process control and anaerobic digestion to laboratory procedures, confined space safety, and Clean Water Act compliance.

Field experience helps. It does not replace preparation. This book does both.

The Wastewater Operator Study Guide 2026-2027 by Casey Wentworth is the most complete, exam-aligned preparation system available for wastewater treatment operator certification — built for candidates at every level, from first-time test takers to experienced operators pursuing advanced grades.

WHAT THIS BOOK COVERS:

Wastewater Treatment Fundamentals — Municipal wastewater characteristics, the conventional treatment train, BOD, TSS, nutrient pollutants, pathogens, and NPDES permit framework Preliminary and Primary Treatment — Screening types and maintenance, comminutors, grit removal, primary clarifier design, operation, and performance calculations Activated Sludge Principles and Control — Aeration systems, oxygen transfer, MLSS, MLVSS, SVI, F/M ratio, sludge retention time, RAS and WAS control Activated Sludge Troubleshooting — Filamentous bulking, Nocardia foaming, rising sludge, toxicity and inhibition events, and full process recovery strategies Secondary Clarification and Fixed-Film Processes — Secondary clarifier design, trickling filters, rotating biological contactors, lagoon and stabilization pond systems Nutrient Removal — Nitrogen cycle in treatment, nitrification conditions, denitrification and MLE process, biological and chemical phosphorus removal Disinfection — CT concept, chlorination chemistry, dechlorination methods, ultraviolet disinfection, and ozonation systems Sludge and Biosolids Management — Gravity and mechanical thickening, anaerobic digestion stages, digester monitoring, dewatering, and EPA Part 503 compliance Plant Hydraulics and Flow Measurement — Weirs, flumes, open channel flow, magnetic flowmeters, pumping fundamentals, TDH calculations, and operator math Equipment Operation and Maintenance — Centrifugal and positive displacement pumps, blowers, aerators, mechanical treatment equipment, VFDs, and preventive maintenance 6 Full-Length Practice Exams — Each built to mirror real certification exam format with complete answer keys and fully explained solutions for every question THIS IS YOUR LICENSE. THIS IS YOUR CAREER.

Certified wastewater operators earn more, advance faster, and carry the professional authority that plant managers, regulators, and communities rely on. The operators who pass on their first attempt are not the ones with the most years on the job — they are the ones who walked in with the right preparation system.

PERFECT FOR:

First-time certification candidates at any operator grade level Experienced plant workers formalizing their expertise with a state license Repeat candidates who came close before and refuse to leave it to chance Utility training coordinators building a staff development library Safe water starts with certified operators. Be one.

Scroll up, grab your copy, and start preparing today.