Exam Changes


 Ontario has adopted ABC standardized exams for:

  • Water Treatment and Water Distribution and Supply (Class 1 to 4)
  • Wastewater Treatment and Wastewater Collection (Class 1 to 4)

The water quality analystwater distribution, limited subsystem and operator-in-training exams continue to use current Ontario exam content.

For more information, please see:
Ontario Drinking Water and Wastewater Certification Exams: Upcoming Changes