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.
Shared WPI prep for confirmed exams only
Program authority: Alaska Department of Environmental Conservation, Division of Water, Operator Certification and Training Program
Local levels: Provisional; Level 1; Level 2; Level 3; Level 4. Separate small-water-system credentials: Small Untreated Water System Certification and Small Treated Water System Certification.
DEC explicitly adopts the 2025 standardized ABC/WPI examinations for WT Provisional/1–4 and directs candidates to WPI's corresponding Class I–IV criteria. Provisional and Level 1 share the examination. Mixed classification reflects the separately named, in-house-generated small-water-system examinations, not customized ABC exams; those small-system credentials are not additional WPI classes.
'2025 Standardized ABC exams are now being used'; lists 'Water Treatment (WT) Provisional/1, 2, 3, 4'; separately identifies 'in-house generated' Small Untreated and Small Treated Water System exams. Identifies ABC as the former name of WPI and links its 2025 criteria.
The state-linked '2025 Standardized Water Treatment Operator Need-to-Know' section provides WPI Standardized Water Treatment Operator Classes I, II, III and IV.
Names Small Untreated Water System Certification and Small Treated Water System Certification; links their exam description, formula sheet, Alaska small-system operator manual and ADEC correspondence courses.
Shared WPI prep for confirmed exams only
Program authority: Alaska Department of Environmental Conservation, Division of Water, Operator Certification and Training Program
Local levels: Wastewater Stabilization Pond (WWSP); Provisional; Level 1; Level 2; Level 3; Level 4.
DEC explicitly identifies standardized 2025 ABC/WPI exams for WWT Provisional/1–4; the state-linked WPI criteria identify Classes I–IV. Provisional and Level 1 share the examination. WWSP is a separate, lower, state-specific credential with an in-house-generated exam, not a customized ABC exam. WWSP certification is required for unaerated lagoon systems serving at least 500 people or having at least 100 service connections; smaller WWSP systems do not require certified operators. Provisional through Level 4 wastewater-treatment certificates also satisfy the WWSP requirement.
'2025 Standardized ABC exams are now being used'; lists 'Wastewater Treatment (WWT) Provisional/1, 2, 3, 4'; separately states that the program administers an 'in-house generated' Wastewater Stabilization Pond exam.
The state-linked '2025 Standardized Wastewater Treatment Operator Need-to-Know' section provides WPI Standardized Wastewater Treatment Operator Classes I, II, III and IV.
Cites 18 AAC 74.120(b)(1) for lagoons without aeration; gives the 500-person/100-connection certification thresholds; says Provisional through Level 4 certifications are higher than WWSP; links the WWSP exam description, formula sheet, study guide and DEC correspondence course.
Shared WPI prep
Program authority: Alaska Department of Environmental Conservation, Division of Water, Operator Certification and Training Program
Local levels: Provisional; Level 1; Level 2; Level 3; Level 4.
DEC explicitly identifies standardized 2025 ABC/WPI exams for WD Provisional/1–4; the state-linked WPI criteria identify the corresponding Classes I–IV. Provisional and Level 1 share the examination. The separately named Small Untreated/Small Treated credentials concern small water systems, not separately identified WD grades; no customized ABC distribution exam was identified.
'Alaska uses the standardized ABC exams'; '2025 Standardized ABC exams are now being used'; lists 'Water Distribution (WD) Provisional/1, 2, 3, 4' and links WPI's 2025 criteria.
The state-linked '2025 Standardized Water Distribution Operator Need-to-Know' section provides WPI Standardized Water Distribution Operator Classes I, II, III and IV.
Shared WPI prep
Program authority: Alaska Department of Environmental Conservation, Division of Water, Operator Certification and Training Program
Local levels: Provisional; Level 1; Level 2; Level 3; Level 4.
Wastewater-collection scope is explicitly documented independently of drinking water: DEC identifies standardized 2025 ABC/WPI exams for WWC Provisional/1–4, and its linked WPI criteria identify Classes I–IV. Provisional and Level 1 share the examination. No customized ABC or separate state-specific collection examination was identified in the opened sources.
'Alaska uses the standardized ABC exams'; '2025 Standardized ABC exams are now being used'; explicitly lists 'Wastewater Collection (WWC) Provisional/1, 2, 3, 4' and links WPI's 2025 criteria.
The state-linked '2025 Standardized Wastewater Collection Operator Need-to-Know' section provides WPI Standardized Wastewater Collection Operator Classes I, II, III and IV.
Dedicated prep is not available or being sold yet.