Operator certification and licensing program changes under the amended emergency order for drinking water system and sewage works.

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