Preparing for Success
The key to passing a certification exam the first time is through preparation and using all resources available to you to study. Check out these tools that will help you take your exam with confidence and prepare you for success.
NTK Criteria
The PO Need-to-Know Criteria (NTK) describes the core competencies covered on certification exams and lists exams specifications as well as reference material that should to used to prepare for the exams.
Candidates can use the NTK to identify exam content areas and the level of comprehension needed for each content area.
WATER DISTRIBUTION NTK CRITERIA
- WPI Standardized Water Distribution Operator Class I
- WPI Standardized Water Distribution Operator Class II
- WPI Standardized Water Distribution Operator Class III
- WPI Standardized Water Distribution Operator Class IV
WATER TREATMENT NTK CRITERIA
- WPI Standardized Water Treatment Operator Class I
- WPI Standardized Water Treatment Operator Class II
- WPI Standardized Water Treatment Operator Class III
- WPI Standardized Water Treatment Operator Class IV
WASTEWATER COLLECTION NTK CRITERIA
- WPI Standardized Wastewater Collection Operator Class I
- WPI Standardized Wastewater Collection Operator Class II
- WPI Standardized Wastewater Collection Operator Class III
- WPI Standardized Wastewater Collection Operator Class IV
WASTEWATER TREATMENT NTK CRITERIA
- WPI Standardized Wastewater Treatment Operator Class I
- WPI Standardized Wastewater Treatment Operator Class II
- WPI Standardized Wastewater Treatment Operator Class III
- WPI Standardized Wastewater Treatment Operator Class IV
Formula Conversion
PO examinees are provided with a formula and conversion table during the exam. The table contains helpful math formulas, unit conversions, and common abbreviations that may be present on the exam.
Study Guides
In partnership with AWWA and WEF, study guides were created to help operators prepare for taking certification exams.
Exam References
When developing exam material, subject matter experts use reference sources. These same sources can be used to prepare for exams or learn more about specific concepts. Learn More
Question Examples
Sample questions are a great way to prepare for exams. While these sample questions are not on any exam and they are not necessarily representative of current exam content, they can help familiarize yourself with a certification exam format. Learn More
