Drinking Water Operator Certification
Exam Specifications

To successfully take a Minnesota Department of Health exam, an operator must demonstrate knowledge of the core competencies in this document. Because certificates may be used to work in various treatment plants and distribution systems, the exams may not include technologies that are not used in each water supply but are commonly used in most.

The specifications list the percentage of questions on the exam that fall under each job duty. For example: 10% of the questions on the Class D exam relate to the job duty “Install Equipment,” and 65% of the Class D questions are based on proper distribution system operation rather than treatment plant operation.

Job Duty Percent of Exam Level
Class D Class C Class B Class A
Comply with Drinking Water Regulations 10 10 10 10
Evaluate and Maintain Equipment 12 10 9 6
Install Equipment 10 8 5 5
Laboratory Analysis-Collect Samples, Perform Analysis, and Interpret Results 8 10 12 15
Monitor, Evaluate, and Adjust Treatment Processes 8 14 18 21
Operate Equipment 14 11 7 5
Perform Safety Procedures 10 8 7 5
Perform Security and Administrative Duties 8 9 12 13
Source Water - Monitor and Evaluate Characteristics 5 5 5 5
System Design 5 5 5 5
Math Questions 10 10 10 10
Total 100 100 100 100
         
Treatment Plant Operation 35% 60% 75% 85%
Distribution System Operation 65% 40% 25% 15%

 

Class E
Operate System 22%
Water Quality Parameters and Sampling

15%
Operate Equipment 19%
Install, Maintain and Evaluate Equipment 15%
Perform Safety Duties 11%
Perform Administrative, Compliance, and Security Duties 18%

 

Updated Monday, April 08, 2013 at 07:38AM