Study materials to help you succeed.
The Need-to-Know Criteria documents provide the exam specifications and job tasks covered on WPI’s standardized exams.
Please get in touch with the certifying authority for your state, province, or geopolitical region to determine which exam preparation materials are appropriate for your jurisdiction and exam date.
The Need-to-Know Criteria documents may only be reproduced with written permission from testing@gowpi.org
Standardized Water Treatment Operator Need-to-Know
- Standardized Water Treatment Operator Class I
- Standardized Water Treatment Operator Class II
- Standardized Water Treatment Operator Class III
- Standardized Water Treatment Operator Class IV
Standardized Water Distribution Operator Need-to-Know
- Standardized Water Distribution Operator Class I
- Standardized Water Distribution Operator Class II
- Standardized Water Distribution Operator Class III
- Standardized Water Distribution Operator Class IV
Standardized Wastewater Collection Operator Need-to-Know
- Standardized Wastewater Collection Operator Class I
- Standardized Wastewater Collection Operator Class II
- Standardized Wastewater Collection Operator Class III
- Standardized Wastewater Collection Operator Class IV
Standardized Wastewater Treatment Operator Need-to-Know
- Standardized Wastewater Treatment Operator Class I
- Standardized Wastewater Treatment Operator Class II
- Standardized Wastewater Treatment Operator Class III
- Standardized Wastewater Treatment Operator Class IV
