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: California State Water Resources Control Board - Drinking Water Operator Certification Program (DWOCP)
Local levels: Water Treatment Operator Grades T1, T2, T3, T4, T5
Mandatory state certification. T1–T4 use computer-based examinations; T5 is a distinct California oral examination. The official report describes State Water Board SME validation and revision of questions against its Expected Range of Knowledge, but does not explicitly identify whether the T1–T4 bank is independently state-authored or supplied/customized by WPI/ABC. Consequently the complete stream's exam-system identity remains unverified; T5 must not be mapped to a standardized WPI Class IV examination.
No state-matched course is linked for this stream yet.
Pages 7–8 identify treatment T1–T4 examinations and state: ‘The drinking water treatment grade 5 examination is an oral examination.’ The Board's SMEs link questions to KSAs on the Expected Range of Knowledge; the Board may revise questions, change distractors, or eliminate questions from the item bank. The attached T5 presentation identifies regulatory, utility-management/emergency, and operational categories.
Title 22, sections 63775 and 63800 separately name T1, T2, T3, T4 and T5 examination/certification grades and their eligibility requirements.
Exam route under review
Program authority: California State Water Resources Control Board - Wastewater Operator Certification Program (WWOCP)
Local levels: Wastewater Treatment Plant Operator Grade I, Grade II, Grade III, Grade IV, Grade V; Operator-in-Training (OIT) is a separate status, not an additional examination grade
Mandatory state wastewater-treatment certification, independently documented rather than inferred from drinking water. California regulations prescribe grade-specific examination content, including California regulations. The opened sources do not explicitly establish the question-bank author or distinguish independent state development from customized ABC supply; standardized WPI/ABC use and a grade-to-class crosswalk remain unverified.
No state-matched course is linked for this stream yet.
‘The Wastewater Operator Certification program (WWOCP) administers Wastewater Treatment Plant Certification examinations, certifications (grades I to V), and certification renewals.’ The page separately links OIT information and states that classified privately owned plants require certified operators as do public plants. Page updated September 29, 2026.
Section 3701(b) requires process-control/evaluation mathematics and progressively detailed knowledge; section 3701(c) specifies Grade I–V exam content. Grade I includes state plant-classification, waste-discharge and certification regulations; Grade III adds state water-recycling regulations; Grade IV adds reclamation/reuse and management; Grade V applies Grade IV content to more difficult and complex situations.
Exam route under review
Program authority: California State Water Resources Control Board - Drinking Water Operator Certification Program (DWOCP)
Local levels: Distribution Operator Grades D1, D2, D3, D4, D5
Mandatory state certification, with computer-based examinations at all five grades. The Board documents local job-analysis/Expected Range of Knowledge validation and item-bank revision. However, no opened source explicitly establishes standardized WPI/ABC use, customized ABC supply, or independent authorship of the entire distribution bank. Do not infer D1–D4 equivalence to WPI Classes I–IV from matching numbers.
No state-matched course is linked for this stream yet.
Pages 7–8 expressly identify drinking-water distribution D1–D5 examinations. Required KSAs were developed through SME job analyses; SMEs validate questions against the Expected Range of Knowledge, and the Board can revise or remove questions from the item bank.
Title 22, sections 63780 and 63805 separately name distribution grades D1, D2, D3, D4 and D5 and their examination/certification requirements.
Dedicated prep not yet available
Program authority: California Water Environment Association (CWEA) - Technical Certification Program
Local levels: Collection System Maintenance (CSM): Grade 1 - Entry Level; Grade 2 - Journey; Grade 3 - Lead; Grade 4 - Manager
CWEA's own California-focused certification and examinations, not a verified WPI/ABC standardized or customized program. This is voluntary professional certification, distinct from the State Water Board's mandatory operator programs; individual employers may require it. The current page designates the 2025 handbook for examinations starting July 1, 2025. Pearson VUE delivery does not establish exam authorship or WPI equivalence.
No state-matched course is linked for this stream yet.
The page explicitly lists Grades 1–4 as Entry Level, Journey, Lead and Manager. ‘CWEA offers voluntary certifications’; some agencies require certification for employment. Its current candidate-materials link specifies the new handbook for exams starting July 1, 2025.
Page 17: CWEA exam blueprints derive from a job-task analysis of California systems and were reviewed by CWEA SMEs in 2025. Pages 76–77: ‘All exam items are written by subject matter experts based on the content outline established by the job task analysis.’ Separate Grade 1–4 outlines include Statewide sanitary-sewer WDR, SSMP requirements, and grade-specific CIWQS spill-reporting/certification responsibilities.
Dedicated prep is not available or being sold yet.