Water Treatment Operator Need-to-Know Criteria
Need-to-Know Criteria outline the content that will be covered on WPI’s standardized examinations provided through ABC Testing, a WPI service.
- Water Treatment Operator Class I
- Water Treatment Operator Class II
- Water Treatment Operator Class III
- Water Treatment Operator Class IV
Water Treatment Operator Formula/Conversion Table
WPI standardized exams are administered with a Formula/Conversion Table containing mathematical formulas and common abbreviations that may be present on the exam.
Water Treatment Operator Exam References
The following are approved as reference sources for WPI’s standardized water treatment operator exams. Operators should use the latest edition of these reference sources to prepare for the exam.
American Water Works Association (AWWA)
- *WSO: Water Treatment Series (Grade 1, Grade 2, Grades 3 & 4)
- **WSO: Water Distribution Series (Grades 1 & 2, Grades 3 & 4)
- ***Water Quality & Treatment
- Water System Security, A Field Guide
- Basic Science Concepts and Applications
*These WSO texts replace previous AWWA titles, Water Treatment, and Water Sources
**These WSO texts replace previous AWWA title, Water Transmission and Distribution
***This WSO text replaces previous AWWA title, Water Quality
Association of State Drinking Water Administrators (ASDWA) and National Rural Water Association (NRWA)
California State University, Sacramento (CSUS) Foundation, Office of Water Programs
- Water Treatment Plant Operation, Volume I and Volume II
- Manage for Success
Regulations
- United States: Code of Federal Regulations, Title 40, Part 141
- U.S. state regulations (contact information for state certification programs is available on the OpCert Program Contacts page)
- Government of Canada (Federal-Provincial-Territorial Subcommittee on Drinking Water): Guidelines for Canadian Drinking Water Quality
- Canadian provincial and territorial regulations (contact information for state certification programs is available on the OpCert Program Contacts page)
