Water Distribution Courses

        2-Day Exam Review Grades 1-2 May 26 – 27, 2026

        2-Day Exam Review Grades 3-4 May 28 – 29, 2026

        5-Day Water Distribution Exam Review Grades 1-2 July 6 – 10, 2026

        Intermediate Water Supplies Principles Course Grades 3-4 July 13 – 21, 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 June 22 – 23, 2026

         2-Day Exam Review Grades 3-4 June 24 – 25, 2026

         Fundamentals of Drinking Water Treatment Course Grades 1-2 June 1 – 9, 2026

         Fundamentals of Drinking Water Treatment Course Grades 3-4 June 8 – 16, 2026

         4-Day Water Treatment Certification Test Prep Grade 5 August 10 – 13, 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

         10-Day Basic Wastewater Treatment Course Grades 1-2 July 20 – 31, 2026

         5-Day Wastewater Exam Review Grades 3-5 August 24 – 28, 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 July 20 – 22, 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.