Are you preparing for upcoming water/wastewater examinations? Recommended study materials are available through the Ontario Water and Wastewater Certification Office (OWWCO) Bookstore.
Additional resources have been provided below and are examples intended to help operators practice questions they may see on exams. They will not replace the appropriate training and experience an operator should have. These resources will not completely cover all exam subject areas.
Visit our online library’s main webpage to find more resources on topics related to drinking water.
Formula and Conversion Tables
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