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

Formerly WEF/ABC Certification Study Guide for Wastewater Treatment Personnel, this newly revised and expanded version of the best-selling WEF/ABC publication i

This updated study guide follows the new requirements established by the ABC. It is organized by certification levels I, II, III, and IV. Questions are ranked f

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

WEF/ABC/C2EP Wastewater Operators' Guide to Preparing for the Certification Examination was prepared jointly by the Water Environment Federation, the Associatio