Study Guides for Examinations, Math Problems and Practice Quizzes
Are you preparing for upcoming examinations? Recommended study materials are available through the Ontario Water and Wastewater Certification Office (OWWCO) Bookstore.
Additional resources have been provided below and are intended to help operators prepare for exams. They will not replace the appropriate training and experience an operator should have. These resources will not completely cover all exam subject areas.
Formula and Conversion Tables