Pass your wastewater certification exam the first time! This study guide is specially developed to give wastewater operators practice answering questions that a

This book contains 4 full-length practice exams for water treatment certification. Each practice exam consists of 100 questions, which test the operator's knowl

This book is for newer wastewater treatment operators who are studying for the Grade 2 exam (second certification level from the bottom). It contains 360 questi

This book offers 1,400 plus practice questions and answers so that you can take your water operator certification exam with confidence.

The Wastewater Operator's Guide to Preparing for the Certification Examination was prepared jointly by the Water Environment Federation, the Association of Boar