Source check: 2026-10-04. Shared WPI courses are linked only where the standardized exam and class match are confirmed. Local grades may not equal WPI class numbers. Your authority's current documents control.
Exam route under review
Program authority: Kentucky Energy and Environment Cabinet - Certification and Licensing Branch, Operator Certification Program
Local levels: Limited certification; Class IA-D treatment certification; Class IB-D treatment certification; Class IIA treatment certification; Class IIB-D treatment certification; Class IIIA treatment certification; Class IIIB treatment certification; Class IVA treatment certification; Class IVB treatment certification. Operator in Training designations also exist. Bottled water certification is listed separately in the regulation.
Kentucky publishes separate Surface Water and Groundwater exam-preparation materials. Opened sources do not establish standardized WPI/ABC, customized ABC, or state-authored examination scope. Local Roman numerals and A/B/D suffixes are not a verified WPI class correspondence.
No state-matched course is linked for this stream yet.
Only operators certified by the Kentucky Certification and Licensing Branch can be in responsible charge of a drinking water or wastewater system.
Section 1(1) expressly lists Limited, IA-D, IB-D, IIA, IIB-D, IIIA, IIIB, IVA and IVB treatment certifications; Section 1(3) separately lists bottled water certification.
Lists Groundwater Treatment Operator Certification Manual, revised 12/03/2014, and Surface Water Treatment Operator Certification Manual, revised 4/04/2018, with separate math guides and formula sheets.
Exam route under review
Program authority: Kentucky Energy and Environment Cabinet - Certification and Licensing Branch, Operator Certification Program
Local levels: Limited certification; Class I Treatment certification; Class II Treatment certification; Class III Treatment certification; Class IV Treatment certification. Operator in Training designations also exist.
Wastewater-specific regulation independently establishes this stream; Limited certification concerns a school treatment plant and collection system. Cabinet administration and a Kentucky manual do not establish exam authorship or WPI standardized scope. No verified shared levels.
No state-matched course is linked for this stream yet.
Only operators certified by the Kentucky Certification and Licensing Branch can be in responsible charge of a wastewater or drinking water system.
Section 1(1) lists Limited and Class I–IV Treatment certifications; Limited permits primary responsibility for a school wastewater treatment plant and collection system.
Wastewater Treatment section lists Wastewater Treatment Plant Operator Certification Manual, revised 4/2024, plus treatment-specific math guide and formula sheet.
Exam route under review
Program authority: Kentucky Energy and Environment Cabinet - Certification and Licensing Branch, Operator Certification Program
Local levels: Class ID distribution certification; Class IID distribution certification; Class IIID distribution certification; Class IVD distribution certification. Operator in Training designations also exist.
Distribution certification and Kentucky preparation materials are explicitly documented. Neither exam-content supplier nor standardized/customized status is established; ID–IVD cannot be mapped to WPI Classes 1–4 merely by their numbering.
No state-matched course is linked for this stream yet.
Identifies the Kentucky Certification and Licensing Branch as the certifying program and directs applicants to 401 KAR Chapter 11.
Section 1(2) lists Class ID, IID, IIID and IVD distribution certifications; Section 1(4) provides Operator in Training designations.
Distribution section lists Distribution System Operator Certification Manual, revised 2/12/2013, and distribution-specific math guide, formula sheet and online class instructions.
Exam route under review
Program authority: Kentucky Energy and Environment Cabinet - Certification and Licensing Branch, Operator Certification Program
Local levels: Class I Collection certification; Class II Collection certification; Class III Collection certification; Class IV Collection certification. Operator in Training designations also exist. Limited certification separately covers a school wastewater treatment plant and collection system.
Collection is expressly offered in the wastewater regulation, not inferred from drinking-water evidence. The regulation states sewage-system operators generally must hold cabinet certification, with a single-residence exception. Standardized WPI/ABC use and any local-to-WPI class mapping remain unverified.
No state-matched course is linked for this stream yet.
Identifies the Kentucky Certification and Licensing Branch as the certifying program for wastewater operators.
Section 1(2) expressly lists Class I, II, III and IV Collection certifications; Section 1(3) provides Operator in Training designations.
Wastewater Collection section lists Wastewater Collection System Operator Certification Manual, revised 4/20/2015, with collection-specific math and formula/conversion resources.
Dedicated prep is not available or being sold yet.