Operator Certification Exams

Operator Certification Exam Schedule

Exams are scheduled for 9 a.m. unless otherwise noted. Search the 2022 exam schedule or 2023 exam schedule to find a location near you. 

Exam Application

A completed original application must be submitted to the department at least 30 days prior to date of exam! 

• Application: Examination for Drinking Water Treatment, Water Distribution, Wastewater Treatment or Concentrated Animal Feeding Operations (CAFO) Waste Management Systems Operator Certificate MO 780-1089

Exam Descriptions

Drinking Water

• Drinking Water A
• Drinking Water B
• Drinking Water C
• Drinking Water D

Wastewater

• Wastewater A
• Wastewater B
• Wastewater C
• Wastewater D

Concentrated Animal Feeding Operation

• CAFO A
• CAFO B

Distribution System

• Distribution System 3
• Distribution System 2
• Distribution System 1

Additional Resources

• Useful Water Wastewater Formulas