Credentials · License family
Professional Operator (PO) Designation
WPI's voluntary international designation for water and wastewater operators: one uniform standard across four disciplines, four levels each, built to travel between jurisdictions where state certifications do not.
Read the full guide: The Professional Operator (PO) Designation →
Variants
- Professional Operator: Water Treatment
The PO designation for drinking water treatment operators, four levels aligned with experience and education, earned by standardized exam (score 70 or above) plus documented experience.
- Professional Operator: Water Distribution
The PO designation for water distribution system operators, four levels aligned with experience and education, earned by standardized exam plus documented experience.
- Professional Operator: Wastewater Treatment
The PO designation for wastewater treatment plant operators, four levels aligned with experience and education, earned by standardized exam plus documented experience.
- Professional Operator: Wastewater Collection
The PO designation for wastewater collection system operators, four levels aligned with experience and education, earned by standardized exam plus documented experience.