Drinking Water Operator Certification
Exam References

The Water Supply System Operator Examinations are comprised of five levels, Class A-E, with A being the highest level. The exams are closed book, time allowed is three (3) hours, each exam has 100 multiple-choice questions, and math formula sheets will be provided. There are some recommended reference sources listed below. In addition we also have lists available on subjects that each operator classification needs to know. If you would like a copy please contact Mark Sloan at 651-201-4652 or Noel Hansen at 651-201-4690. The training materials available to you, along with your operating experience and common sense, should help you pass the certification exam.



Math Formula Conversion Tables:
Class A and B
(PDF: 103KB/4 pages)
Class C and D
(PDF: 133KB/2 pages)
   

Recommended Reference Sources:

Minnesota Class E Study Guide. Contact Noel Hansen at 651-201-4690 or the Minnesota Rural Water Association (MRWA)

Minnesota Class D Study Guide - The Minnesota Department of Health study guide provides information about chemical addition, math and much more. Contact MDH (Noel Hansen at 651-201-4690) or the MRWA.

Minnesota Rural Water Association (MRWA): Minnesota Water Works Operations Manual

For study materials you can also go to the bookstore at American Water Works Association.

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Updated Tuesday, August 16, 2016 at 09:21AM