Filters 
LICENSE CATEGORY
Wastewater
284
LICENSE SUBCATEGORY
Operator-in-Training
1,420
Provisional
1,097
Wastewater Apprentice
777
Wastewater Operator Class A
619
Wastewater Operator Class A-SO
576
Wastewater Operator Class B
491
Wastewater Operator Class C
471
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Indiana
284