Water Distribution Courses

        2-Day Exam Review Grades 1-2 March 23 – 24, 2026

        2-Day Exam Review Grades 3-4 March 25 – 26, 2025

        5-Day Water Distribution Exam Review Grades 1-2 March 2 – 6, 2026

        Intermediate Water Supplies Principles Course Grades 3-4 March 9 – 13, 2026

       *also see CEU Elective section for additional classes

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

        General Class Listing and Descriptions

Water Treatment Courses

         2-Day Exam Review Grades 1-2 April 20 – 21, 2026

         2-Day Exam Review Grades 3-4 April 22 – 23, 2026

         5-Day Water Treatment Exam Review Grades 1-2 March 30 – April 3, 2026

         5-Day Water Treatment Exam Review Grades 3-4 April 13 – 17, 2026

        **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 March 23 – 27, 2026

         5-Day Wastewater Exam Review Grades 3-5 April 27 – May 1, 2026

     *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)

            3-Day Certified Field Sampling May 18 – 20, 2026

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.