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Certification Level
Continuing Education Hours Required
  
Limited (only available for operators working for a school water treatment plant or for a semipublic water supply; or for operators working for a school wastewater treatment plant and collection system.
12 hours
  
Class I and Class II
12 hours
  
Class III and Class IV
24 hours
  
Class I-OIT and Class II-OIT
12 hours
  
Class III-OIT and Class IV-OIT
24 hours