This book is designed as a practical study aid for individuals preparing to take the Texas Commission on Environmental Quality (TCEQ) Class D Wastewater Treatment Facility Operator Licensing Exam.
Whether you’re new to the wastewater field or looking to reinforce your foundational knowledge, these practice questions will help you get familiar with the kinds of topics and terminology you’ll encounter on the test. The questions in this book are unofficial and independently developed to reflect key areas covered by the Class D exam, including treatment processes, safety procedures, basic math, sampling, regulations, and equipment operation.
Each multiple-choice question includes an answer and a brief explanation to support your learning and help you understand the reasoning behind the correct choice. Use this book as a companion to your official study materials, in class, or during your self-study sessions to boost your confidence and improve your readiness for test day.
Let’s get started and take one step closer to earning your Class D license and contributing to the essential work of protecting Texas’s water quality.
