Idaho Water Operator Certification Guide

Who regulates water operators in Idaho?

Idaho Board of Drinking Water and Wastewater Professionals through the Division of Occupational and Professional Licenses; DEQ classifies and enforces system staffing. administers the credentials covered here.

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Certification types

Drinking-water treatment/distribution and wastewater treatment/collection: OIT, restricted/lagoon/land-application where applicable, Classes I-IV
drinking-water and wastewater Very Small System
wastewater laboratory analyst Classes I-IV
backflow tester.

Certification levels / grades / classes

Drinking-water treatment/distribution and wastewater treatment/collection: OIT, restricted/lagoon/land-application where applicable, Classes I-IV; drinking-water and wastewater Very Small System; wastewater laboratory analyst Classes I-IV; backflow tester.

Initial certification requirements

Register with PSI/WPI and pass the applicable examination before submitting the IDOPL license application; document required education and verified operating/responsible-charge experience under IDAPA 24.05.01.

Exam information

Register with PSI/WPI and pass the applicable examination before submitting the IDOPL license application; document required education and verified operating/responsible-charge experience under IDAPA 24.05.01.

Renewal cycle

Idaho transitioned this Board to biennial licenses beginning October 14, 2025, phased by birth year; renew through DOPL Online Services.

Continuing-education requirements

Six classroom hours (0.6 CEU) germane to each license type per licensing year; holders of both drinking-water and wastewater licenses complete six for each type. Up to six hours may carry to the next cycle.

Reciprocity / out-of-state operators

Licensure by endorsement is the pathway for an operator licensed in another jurisdiction; submit complete application and third-party license/exam verification for Board equivalency review.

Water vs. wastewater differences