Study Guides

Below is a list of study guides (obtained from ABC website – Study material can be sourced from ABC, AWWA & WEF. Select the links below:

Examination Supplier
Water Treatment and Distribution Operators American Water Works Association Bookstore

Phone (800) 926-7337

 Operator Certification Study Guide, Fifth Edition: A Guide to Preparing for Water Treatment and Distribution Operator Certification Exams

Wastewater Treatment, Collection and Wastewater Laboratory 
Water Environment Federation Bookstore

Phone (800) 666-0206

WEF/ABC Wastewater Operators’ Guide to Preparing for the Certification Examination

WEF/ABC Collection Systems Operators’ Guide to Preparing for the Certification Examination

WEF/ABC Wastewater Laboratory Analysts’ Guide to Preparing for the Certification Examination

Wastewater and Laboratory practice questionsdeveloped by WEF are available in the Skills Buildersection of WEF’s web site.

Very Small Water Systems Operators  The Very Small Water System Operators’ Guidebook to Preparing for Certification relates to critical knowledge required to competently operate water systems.

Very Small Water Systems web-based practice exam

Formula/Conversion Tables ABC Formula/Conversion Tables are provided during the examination and should be used to solve exam calculations


 Sample Exam Questions

Sample Exam Questions


Online Exam Format

ABC Water Treatment

ABC Wastewater Treatment

ABC Collection

ABC Distribution

ABC Laboratory Analysis


Need-to-Know Criteria 

The Need-to-know Criteria sourced from  ABC :

Need-to-Know Criteria describe the core competencies covered on the ABC standardized exams and lists exam specifications, as well as reference material that should be used to prepare for the ABC exam.

Need-to-Know Criteria may be reproduced with written permission from ABC.

Water Treatment


Very Small Water System

Wastewater Treatment


Water Laboratory Analyst

Wastewater Laboratory Analyst