About
About TradeQBank
TradeQBank is a practice-exam provider for water and wastewater operator certification. It publishes original question banks built to the WPI 2025 Need-to-Know Criteria — 326 questions per bank — with a source citation on every answer, independent verification before publication, free 25-question samples, and timed mock exams. Banks cost $49 one-time, or $99 for all-access.
What TradeQBank is
TradeQBank sells study material for the standardized operator exams used by most state certification programs: Water Treatment Class I and Class II, Wastewater Treatment Class I, and Water Distribution Class I. Every bank is written from the exam's published blueprint and its approved references — the same textbooks and regulations the Need-to-Know Criteria name — and every answer carries the citation it was checked against. Buyers get untimed practice by content area and a 110-question timed mock exam scored against the real 70% pass mark.
What TradeQBank is not
TradeQBank is not a certification body and does not administer or grade any official exam. It is not affiliated with, endorsed by, or sponsored by Water Professionals International (WPI), the Association of Boards of Certification (ABC), or any state certification program. The questions are original practice questions, not actual exam questions — the real exams are confidential — and using them does not guarantee a passing score.
How the banks are verified
Each bank passes an independent verification before it is published: a second pass derives every answer without seeing the original key, recomputes every calculation item, and flags anything ambiguous. Banks are re-verified on a scheduled annual pass and whenever WPI republishes the Need-to-Know Criteria or a cited rule changes. The full process is described on the method page.
Contact
Email [email protected] — for lost access codes, billing questions, and error reports. If you find an answer you believe is wrong, say which question; it gets checked against its cited source, fixed if you are right, and the purchase refunded if a wrong answer shipped.
FAQ
Common questions
What is TradeQBank?
TradeQBank is a practice-exam provider for water and wastewater operator certification exams. It publishes original practice question banks built to the Water Professionals International (WPI) 2025 Need-to-Know Criteria, with a source citation and an independent verification pass on every answer.
Is TradeQBank affiliated with WPI or ABC?
No. TradeQBank is an independent study-materials provider. It is not affiliated with, endorsed by, or sponsored by Water Professionals International (WPI) or the Association of Boards of Certification (ABC); exam names and the Need-to-Know Criteria are referenced only to describe what the practice material covers.
How can I contact TradeQBank?
Email [email protected]. Buyers who lose an access code or find a question they believe is wrong can write to the same address; error reports are verified against the cited official references.