Need-to-Know Criteria

Testing Services

Study materials to help you succeed.

The Need-to-Know Criteria provide the exam specifications and job tasks covered on the ABC standardized exams.

Please contact the certifying authority for your state, province, or geopolitical region to determine which exam preparation materials are appropriate for your jurisdiction and exam date.

The following ABC Need-to-Know Criteria are available in PDF format by selecting the links below. Need-to-Know Criteria may be reproduced with written permission from ABC.


Backflow Prevention Assembly Tester


Biosolids Land Applier


Industrial Waste Operator


Plant Maintenance Technologist


Very Small Water System Operator


Wastewater Collection Operator


Wastewater Laboratory Analyst


Wastewater Treatment Operator


Water Distribution Operator


Water Laboratory Analyst


Water Treatment Operator