Operator Certification Examination Dates, Applications and Reference Materials

The following table lists the upcoming examination dates and application deadlines. The examinations will be held at Goodwin College in East Hartford, CT. Additional information is provided in the Application Instructions. Click on any of the underlined examination titles to go to the application form for that examination.

Examination Titles/Application Forms

Application Instructions

Exam Date

Application Deadline

Water Treatment Plant Operator (DWPO) - Classes I, II, III,& IV WTP Application Instructions

Thurs. July 19, 2018 or Tues. July 24, 2018

Monday, June 11, 2018

DWPO Operator-in-Training (OIT) - Classes I, II, III,& IV WT OIT Application Instructions

Thurs. July 19, 2018 or Tues. July 24, 2018

Monday, June 11, 2018

Distribution System Operator (DWDO) - Classes I, II, & III DS Application Instructions Friday July 20, 2018 or Wed. July 25, 2018

Monday, June 11, 2018

DWDO Operator-In-Training (OIT) - Classes I, II, & III DS OIT Application Instructions Friday July 20, 2018 or Wed. July 25, 2018

Monday, June 11, 2018

Small Water System Operator - DWSO SWS Application Instructions

Friday July 20, 2018 or Wed. July 25, 2018

Monday, June 11, 2018

Examination Reference Materials

The links below provide information on the examination subjects and reference materials for operator examinations. The Association of Boards of Certification (ABC) provides the certification examinations. The items listed on the subject lists are incorporated within the generalized exam topics on the ABC reference material lists. Please note that the reference material list for water treatment examinations is applicable to both the Water Treatment Plant and Small Water System Operator Examinations.

Providing these lists of references does not constitute an endorsement. The references on the lists are not the only training materials available. Although you may use these resources in preparation for certification examinations, these lists do not imply that any one of these references includes all information contained on an examination.

  • Small Water System Examination Subject List
  • Water Treatment Operator Examination Subject List
  • Distribution System Operator Examination Subject List
  • Small Water System Reference Material
  • Exam Formula /Conversion Table