Water Distribution

        2-Day Exam Review Grades 1-2 December 8 – 9, 2025

        2-Day Exam Review Grades 3-4 December 10 – 12, 2025

        5-Day Water Distribution Exam Review Grades 1-2 November 3 – 7, 2025

        Intermediate Water Supplies Principles Course Grades 3-4 November 13 – 21, 2025

        5-Day Water Distribution Exam Review Grade 5 November 17 – 21, 2025

         *also see CEU Elective section for additional classes

       Click on the button below to view even more class dates.

Water Treatment

         2-Day Exam Review Grades 1-2 October 27 – 28, 2025

         2-Day Exam Review Grades 3-4 October 29 – 30, 2025

         Fundamentals of Drinking Water Treatment Course Grades 1-2 February 2026!

         Fundamentals of Drinking Water Treatment Course Grades 3-4 October 16 – 24, 2025

        **See our Southern California section below for Southern California dates on our Certified Test Prep classes.

       *also see CEU Elective section for additional classes

Click on the button below to view even more class dates.

Wastewater

    5-Day Wastewater Exam Review Grades 1-2 December 1 – 5, 2025

    5-Day Wastewater Exam Review Grades 3-5 December 8 – 12, 2025

     *also see CEU Elective section for additional classes

     Click on the button below to view even more class dates.

CEU Elective, Specialty & Off-site Classes (individual classes subject to cancellation or change)

Southern California Classes

If you, or your facility, are interested in scheduling any of OCT’s classes, reviews, or courses, please feel free to contact our Customer Service team Monday through Friday 7:30am – 3:30pm.

Click on the button below to view even more class dates.