Credentials · Certification
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.
Verified requirements
| Where | Expires | Renewal | Continuing education |
|---|---|---|---|
| United States (federal) | Yes | Confirm with issuer | Confirm with issuer |
Information comes from issuing-authority sources. Confirm current rules, fees and eligibility before acting.