This page cannot be printed from here

Please use the dedicated print option from the 'view' drop down menu located in the blue ribbon in the top, right section of the publication.

screenshot of print menu option

Description: WEF-ABC_C2EP Cover - edit7
WEF/WPI/C2EP Collection Systems Operator’s Guide to Preparing for the Certification Examination, 2nd Edition
Buy Print Version Here
WEF/WPI/C2EP Collection Systems Operators’ Guide to Preparing for the Certification Examination, 2nd Edition was prepared jointly by the Water Environment Federation, the Water Professionals International (WPI), and the Certification Commission for Environmental Professionals (C2EP). The second edition of this critical study guide has been updated to reflect new Need-to-Know Criteria and core competencies for collection of system operators.
The questions in this guide are carefully selected to reflect the full range of responsibilities associated with a collection system operator’s role. Designed to mirror the format and scope of certification exams, they provide a representative sample of question styles and key topics, helping readers build familiarity and confidence in preparation for testing.
The guide includes C2EP's education and experience requirements, tips for taking a certification examination, and sample formulas and conversions. Detailed answers to mathematical problems and references are provided.
Author(s)
Water Environment Federation
SourceWEF/WPI/C2EP Collection System Operators’ Guide to Preparing for the Certification Examination (2nd edition) Task Force
Document typeDigital Book
PublisherWater Environment Federation
Print publication date Sep 2026
Print ISBN 978-1-57278-492-5
EISBN 9781572784925
Volume / Issue
First / last page(s)1 - 98
Copyright2026
Word count15,495
Subject keywordsCollection systemstrainingcertificationstudycertification examoperatorsworkforceoperationstest questionsstudy guide

Purchase price $114.99

Get access
Description: WEF-ABC_C2EP Cover - edit7
ABOUT WEF
WEF/WPI/C2EP Collection Systems Operator’s Guide to Preparing for the Certification Examination, 2nd Edition
The Water Environment Federation (WEF) is a not-for-profit technical and educational organization of more than 30,000 individual members and 75 affiliated Member Associations representing water quality professionals around the world. Since 1928, WEF and its members have protected public health and the environment. WEF and its global network of members and...
PublisherWater Environment Federation
Copyright2026
Word count110
Read
Description: WEF-ABC_C2EP Cover - edit7
ABOUT WPI
WEF/WPI/C2EP Collection Systems Operator’s Guide to Preparing for the Certification Examination, 2nd Edition
Water and wastewater treatment professionals are on the front lines of protecting public health and the environment. Since 1972, Water Professionals International (WPI, formerly known as the Association of Boards of Certification or ABC) has been the central authority in the water industry, ensuring that water and wastewater professionals are prepared to meet the standards their communities can...
PublisherWater Environment Federation
Copyright2026
Word count117
Read
Description: WEF-ABC_C2EP Cover - edit7
CERTIFICATION COMMISSION FOR ENVIRONMENTAL PROFESSIONALS
WEF/WPI/C2EP Collection Systems Operator’s Guide to Preparing for the Certification Examination, 2nd Edition
In 2012, WPI created the Certification Commission for Environmental Professionals (C2EP) to enhance and administer WPI’s certification and standardized exam development programs. C2EP is composed of industry experts and independently administers professional operator (PO) certifications and professional designations built on the highest standards for psychometrics and personnel...
PublisherWater Environment Federation
Copyright2026
Word count76
Read
Description: WEF-ABC_C2EP Cover - edit7
REFERENCE MATERIALS
WEF/WPI/C2EP Collection Systems Operator’s Guide to Preparing for the Certification Examination, 2nd Edition
This study guide was developed using the same authoritative references approved by WPI for the standardized Wastewater Collection Operator certification examinations. The material aligns with the 2025 Need-to-Know Criteria and is intended to provide operators with a practical understanding of wastewater collection system operation, maintenance, safety, troubleshooting, and regulatory compliance....
PublisherWater Environment Federation
Copyright2026
Word count283
Read
Description: WEF-ABC_C2EP Cover - edit7
CONTENTS
WEF/WPI/C2EP Collection Systems Operator’s Guide to Preparing for the Certification Examination, 2nd Edition
This study manual has been developed keeping the operator in mind. WEF’s and WPI’s goals are to provide operators with a resource to help them prepare before taking the WPI Exam. Also included in the following pages is the WPI Formula/Conversion Table you will be provided during examination. We encourage you to review and become familiar with this information before taking the exam.
PublisherWater Environment Federation
Copyright2026
Word count137
Read
Description: WEF-ABC_C2EP Cover - edit7
PREFACE
WEF/WPI/C2EP Collection Systems Operator’s Guide to Preparing for the Certification Examination, 2nd Edition
Water Professionals International (WPI; formerly ABC), the Certification Commission for Environmental Professionals (C2EP), and the Water Environment Federation (WEF) have worked together to produce this document based on industry-wide job analyses and Need-to-Know Criteria. This publication is designed to give the user practice answering multiple-choice examination questions that are similar in...
PublisherWater Environment Federation
Copyright2026
Word count356
Read
Description: WEF-ABC_C2EP Cover - edit7
CERTIFICATION COMMISSION FOR ENVIRONMENTAL PROFESSIONALS’ EDUCATION AND EXPERIENCE REQUIREMENTS
WEF/WPI/C2EP Collection Systems Operator’s Guide to Preparing for the Certification Examination, 2nd Edition
The Certification Commission for Environmental Professionals offers certification and professional designation to collection system operators. In addition to examination requirements, the following education and experience requirements must be met for C2EP certification and professional designation:
PublisherWater Environment Federation
Copyright2026
Word count433
Read
Description: WEF-ABC_C2EP Cover - edit7
TIPS FOR TAKING A CERTIFICATION EXAMINATION
WEF/WPI/C2EP Collection Systems Operator’s Guide to Preparing for the Certification Examination, 2nd Edition
The following are some helpful tips for successfully taking a certification examination.
PublisherWater Environment Federation
Copyright2026
Word count1,395
Read
Description: WEF-ABC_C2EP Cover - edit7
NEED-TO-KNOW CRITERIA
WEF/WPI/C2EP Collection Systems Operator’s Guide to Preparing for the Certification Examination, 2nd Edition
The Wastewater Collection Operator Class I, II, III, and IV exams will test you on essential job tasks. These job tasks have been categorized into the Content Areas detailed in the following pages. The table below summarizes the areas that are included on the exam, the number of test questions in each of these areas, and the complexity of the test questions in each area.
PublisherWater Environment Federation
Copyright2026
Word count269
Read
WEF/WPI/C2EP Collection Systems Operator’s Guide to Preparing for the Certification Examination, 2nd Edition