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Updates to the program
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Exam information
Forms & applications
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Exam dates

Exam datePostmark deadline
November 4, 2015 October 7, 2015
May 4, 2016 April 6, 2016

Exam Information

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

Exams are multiple choice questions. Wastewater exams are 50 questions each, with the exception of the Advanced exam (100 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.


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

Waterworks and wastewater operators will automatically be sent an exam application two months prior to the upcoming exam date, if the operator has taken an exam(s) in the last year and a half. An operator who has not taken an exam in the last year and a half and new operators may download an exam application from the forms page.

Exam scores required to pass

  • 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 (maximum of 60 days per Act 167 [PDF]). 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: Friday August 21 2015