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: Missouri Department of Natural Resources (MoDNR), Operator Certification Unit
Local levels: Drinking Water D; Drinking Water C; Drinking Water B; Drinking Water A
At the requested cutoff, existing Missouri exams precede the explicitly announced January 1, 2027 WPI standardized transition. The sources do not establish whether those existing exams are WPI-customized or independently state-developed. The announced future crosswalk D→1, C→2, B→3, A→4 must not be applied to October 2026 shared routing.
No state-matched course is linked for this stream yet.
Lists Drinking Water A, B, C and D. Under New 2027 Exams: the department will transition to standardized exams through WPI; 'The new exams will go live Jan. 1, 2027,' with existing exams available until the switch.
Exam route under review
Program authority: Missouri Department of Natural Resources (MoDNR), Operator Certification Unit
Local levels: Wastewater D; Wastewater C; Wastewater B; Wastewater A
Wastewater is independently documented, not inferred from drinking water. Existing exams remain until the January 1, 2027 standardized transition; their customized-WPI versus state-developed construction is unverified. The future D→1, C→2, B→3, A→4 crosswalk is not current shared-level evidence.
No state-matched course is linked for this stream yet.
Separately lists Wastewater A, B, C and D exam descriptions. Its January 2027 standardized-exam table maps those grades to Wastewater Treatment Classes 4, 3, 2 and 1.
Exam route under review
Program authority: Missouri Department of Natural Resources (MoDNR), Operator Certification Unit
Local levels: Distribution System 1; Distribution System 2; Distribution System 3
The current legacy exam construction is unresolved: WPI-customized versus state-developed is not explicitly identified. The standardized transition is January 1, 2027, not October 2026. Its future crosswalk is Distribution System 1→WPI Class 2, 2→Class 3, 3→Class 4; no local equivalent to WPI Class 1 is listed.
No state-matched course is linked for this stream yet.
Separately lists Distribution System 3, 2 and 1 exam descriptions. The New 2027 Exams table maps these to Water Distribution Classes 4, 3 and 2, respectively, and specifies January 1, 2027 implementation.
Exam route under review
Program authority: Missouri Water Environment Association (MWEA), Collection Systems Committee - voluntary certification
Local levels: A; B; C; D - Voluntary Collection Systems Operator Certification, as listed in MWEA's published application PDF; latest DOCX revision unverified
A separate voluntary MWEA credential is documented. Neither its application nor its study guide explicitly establishes WPI standardized or customized examinations, or a local-to-WPI class correspondence. State designation and any separate mandatory collection credential were not verified; do not inherit MoDNR treatment-exam routing.
No state-matched course is linked for this stream yet.
Provides a distinct Collection Systems Certification Resources section with an MWEA study guide, examination application and renewal application.
Names the Missouri Water Environment Association Collection Systems Committee and explicitly labels the program voluntary. 'Certification Level Sought' lists A, B, C and D; applicants agree to the committee's certification rules.
MWEA-authored outline addresses collection-system basics, operator mathematics, pumping/piping factors, sewage hazards, spill reporting and remediation, and environmental surveillance/recordkeeping/reporting; it does not establish a standardized WPI examination.
Dedicated prep is not available or being sold yet.