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: Oregon Health Authority - Drinking Water Services (DWS)
Local levels: Treatment Level 1, Treatment Level 2, Treatment Level 3, Treatment Level 4; Filtration Endorsement (FE); Operator in Training (OIT) takes the Level 1 exam.
OHA publishes ABC Class 1–4 treatment study criteria, but the opened authority material does not explicitly establish whether Oregon administers standardized or customized ABC exams. Do not enable standardized shared-level routing from these study links or PSI scheduling alone. Filtration Endorsement is a separate local qualification associated with Treatment Level 2.
No state-matched course is linked for this stream yet.
Lists ABC Water Treatment Operator Need-to-Know Criteria for Classes 1–4; says OIT applicants take the treatment Level 1 exam; FE applicants must currently hold Treatment Level 2 certification.
Lists Water Treatment 1–4. Filtration Endorsement applies to qualifying Water Treatment 2 plants using conventional or direct filtration; operators already certified at Water Treatment Level 3 or higher are excepted from that endorsement requirement.
WPI exam, class match under review
Program authority: Oregon Department of Environmental Quality (DEQ) - Wastewater Operator Certification Program
Local levels: Grade I and Grade II explicitly confirmed for treatment; the general wastewater exam update also names Grade IV. Complete stream-specific higher-grade names remain unverified within the acquisition limit. Entry pathways include Operator-in-Training and Provisional Grade I; Small Wastewater System is a separate local route.
DEQ explicitly identifies its standardized exam adoption and the May 1, 2025 exam update; its treatment preparation resources cover WPI Classes I–IV. However, the acquired text does not explicitly map each local Oregon treatment Grade to the corresponding WPI Class, so no shared levels are verified. The separate Small Wastewater System examination's standardized/customized status is unverified.
No state-matched course is linked for this stream yet.
States: 'DEQ has administered the Association of Boards of Certification 2019 standardized exam since Jan. 1, 2022.' Announces new exams offered May 1, 2025 and identifies 'WPI 2025 standardized exams' and their Need-to-Know criteria.
Explicitly lists WPI Standardized Wastewater Treatment Operator Classes I, II, III and IV.
Names 'Wastewater Collection and Treatment Grade I and II Exams'; links standardized wastewater treatment preparation resources. Separately lists Operator-in-Training/Provisional Grade I training and 'Small Wastewater System Operator ABC Need-to-Know Criteria'.
Exam route under review
Program authority: Oregon Health Authority - Drinking Water Services (DWS)
Local levels: Distribution Level 1, Distribution Level 2, Distribution Level 3, Distribution Level 4; Operator in Training (OIT) takes the Level 1 exam. Small water systems have a separate system classification.
Four distribution certification levels and ABC Class 1–4 study documents are supported. Explicit standardized-exam adoption, rather than customized ABC examinations, is not established by the opened OHA sources. Small-system classification does not establish the small-system credential's examination type.
No state-matched course is linked for this stream yet.
States: 'There are four levels of distribution certification.' Lists ABC Distribution Operator Class 1–4 study criteria and states OIT applicants take the distribution Level 1 exam.
Lists Water Distribution 1–4. Separately classifies systems serving 150 service connections or fewer that use groundwater or purchase finished water as small water systems.
WPI exam, class match under review
Program authority: Oregon Department of Environmental Quality (DEQ) - Wastewater Operator Certification Program
Local levels: Grade I and Grade II explicitly confirmed for collection; the general wastewater exam update also names Grade IV. Complete stream-specific higher-grade names remain unverified within the acquisition limit. Entry pathways include Operator-in-Training and Provisional Grade I.
Collection has independent official support: DEQ links standardized collection resources, and its 2025 examination document lists collection Classes I–IV. DEQ's wastewater exam update establishes standardized adoption, but an explicit local collection Grade-to-WPI Class crosswalk was not acquired. Therefore no shared levels are verified; this conclusion is not inferred from drinking-water evidence.
No state-matched course is linked for this stream yet.
Addresses wastewater collection and treatment systems; explicitly describes DEQ's standardized ABC examination adoption and the WPI 2025 standardized exam update offered May 1, 2025.
Explicitly lists WPI Standardized Wastewater Collection Operator Classes I, II, III and IV.
Names 'Wastewater Collection and Treatment Grade I and II Exams' and links Wastewater Collection Operator Preparation Resources to WPI's standardized wastewater collection examinations.
Dedicated prep is not available or being sold yet.