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: Ohio Environmental Protection Agency (Ohio EPA), Division of Drinking and Ground Waters, Operator Certification Unit
Local levels: Water Supply: Class A, Class I, Class II, Class III, Class IV
WPI is the approved third-party provider for Classes A–III; Class IV is expressly excluded and has a separate Ohio EPA examination/guidance route. The June 2025 direct-program chart maps Ohio A to Very Small Water System, I to WPI 1, II to WPI 2, and III to WPI 3. Opened sources do not explicitly establish whether the direct Ohio exams are standardized or customized. The optional C2EP route has different correspondence and must not be substituted for the direct-program chart.
No state-matched course is linked for this stream yet.
WPI is approved as a third-party exam provider for all levels except Class IV; the page separately lists Class IV policy, guidance, examination and drinking-water review checklist.
Water Supply A = Very Small Water System VSWS; Water Supply 1 = Water Supply 1; 2 = 2; 3 = 3. Candidates selecting the Ohio EPA program select their Ohio EPA examination level.
Identifies Class A, I, II, III or IV Water Supply certification and Ohio EPA certification applications.
Exam route under review
Program authority: Ohio Environmental Protection Agency (Ohio EPA), Division of Drinking and Ground Waters, Operator Certification Unit
Local levels: Water Reclamation (also styled Wastewater Treatment): Class A, Class I, Class II, Class III, Class IV
WPI covers Classes A–III; Class IV is expressly excluded and has a separate Ohio EPA examination/guidance route. The June 2025 direct-program chart maps Ohio A to Small Wastewater Treatment A, I to WPI 1, II to WPI 2, and III to WPI 3. Standardized versus customized status remains unverified. The optional C2EP route maps Ohio I/II/III to C2EP II/III/IV, not the direct-program correspondence.
No state-matched course is linked for this stream yet.
Lists Class A and Classes 1–3 Water Reclamation preparation materials; excludes Class IV from WPI and links separate Class IV wastewater guidance and review checklist.
Water Reclamation A = Small Wastewater Treatment A; Water Reclamation 1 = Wastewater Treatment 1; 2 = 2; 3 = 3.
Identifies Class A, I, II, III or IV Wastewater Treatment certification, independently of drinking-water credentials.
Exam route under review
Program authority: Ohio Environmental Protection Agency (Ohio EPA), Division of Drinking and Ground Waters, Operator Certification Unit
Local levels: Water Distribution: Class I, Class II
The direct Ohio EPA program uses WPI-administered exams, with Ohio I mapped to WPI 1 and Ohio II to WPI 2 in the June 2025 chart. Standardized versus customized status is not explicitly established by the opened Ohio-specific sources. The optional C2EP program instead lists Ohio II against C2EP III; this is a separate route.
No state-matched course is linked for this stream yet.
Distribution: Water Distribution 1 = Water Distribution 1; Water Distribution 2 = Water Distribution 2.
The direct Ohio EPA exam-only route lists Water Distribution Classes I and II. The separate voluntary C2EP route lists Distribution I (Ohio I) and Distribution III (Ohio II).
Identifies Ohio Class I or II Water Distribution certification; examinations are offered through approved provider WPI.
Exam route under review
Program authority: Ohio Environmental Protection Agency (Ohio EPA), Division of Drinking and Ground Waters, Operator Certification Unit
Local levels: Wastewater Collection: Class I, Class II
Ohio collection certification is explicitly offered. The June 2025 direct-program chart maps Ohio I to WPI Collection 2 and Ohio II to WPI Collection 3. Standardized versus customized status is not explicitly established. The separate voluntary C2EP route maps Ohio I to C2EP II and Ohio II to C2EP IV; do not merge the routes or assume local and WPI numbers match.
No state-matched course is linked for this stream yet.
Collections: Wastewater Collection 1 = Wastewater Collection 2; Wastewater Collection 2 = Wastewater Collection 3.
Direct Ohio EPA route lists Wastewater Collection Classes I and II. Separate voluntary C2EP route lists Collection II (Ohio I) and Collection IV (Ohio II).
Identifies Class I or II Wastewater Collection certification and Ohio EPA as the certifying agency.
Dedicated prep is not available or being sold yet.