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Exam dates

Exam datePostmark deadline
November 2, 2016 October 5, 2016
May 3, 2017 April 5, 2017

Exam information

Certification exams are offered twice annually, the first Wednesday in May and November, at seven locations across the state: Green Bay, Madison, Eau Claire, Rhinelander, Rice Lake, West Allis, and Plover.

Exams are multiple choice questions (with the exception of the wastewater - unique treatment systems exam). Wastewater exams are 50 questions each, with the exception of the advanced exam (100 questions), attached growth processes exam (25 questions), and the recirculating media filters exam (25 questions). Waterworks exams are 40 questions each with the exception of the surface water exam which is 80 questions. Septage exams are 40 questions. Landfill exams are 50 questions.

Each exam day has a 9 a.m. session and 1 p.m. session, and each session is 3 hours in length. An applicant may split up their exams between the morning and afternoon session. Please indicate on the exam application which exams you would like to take in the morning and which in the afternoon if you are taking exams at both times.

Additional information, including information for exam preparation, may be found under the different certification tabs.


Applications become available on the forms page 2 1/2 months prior to the exam date. Applications postmarked after the deadline will be returned.

Passing score

  • A score of 75% or higher is a passing score on each exam for waterworks, wastewater, septage, and small water systems (OTM/NN).
  • A score of 70% or higher is a passing score on each exam for landfill certifications.

Exam results will be mailed to each applicant normally within 30 days of the date of the exam. Applicants who have failed a written exam may apply to re-take the exam at any future exam date by completing an application and paying the exam fee.

Last revised: Monday May 23 2016