These terms govern your use of WastewaterAce.com and any digital products purchased through it. By using this site or purchasing a study guide, you agree to them. WastewaterAce.com is an independent study resource operated as a sole proprietorship.
WastewaterAce.com publishes study material, reference articles, and practice questions for wastewater treatment operators preparing for certification examinations. Everything here is educational material. It is not professional engineering advice, not regulatory guidance, and not a substitute for the requirements set by your employer, your permit, or your state's certifying authority.
WastewaterAce.com is not affiliated with, endorsed by, or produced in partnership with Water Professionals International (WPI), the Association of Boards of Certification (ABC), the Water Environment Federation (WEF), any state Department of Natural Resources or environmental agency, or any other certifying authority.
All practice questions are original works written to support operator study. They do not reproduce actual examination questions and are not drawn from any examination question bank. References to published standards and reference works are for educational context only.
Performance on our practice materials does not predict or guarantee performance on any certification examination. Examination content, scope, scoring, and passing requirements are set by individual certifying authorities and change over time. You are responsible for verifying current requirements with your own certifying authority before sitting for an exam.
We work to keep technical content accurate and current, and we cite sources where appropriate. Even so:
Always verify against your own state's regulations, your facility's NPDES permit, and the current approved method before acting on anything published here. If you find an error, please tell us — corrections are welcome and we act on them.
Study guides are delivered as PDF files through Gumroad. When you purchase one, you receive a personal, non-transferable license to use it. You may:
You may not resell, redistribute, upload to file-sharing services, or republish the material in whole or in part. Facility-wide or multi-operator use requires a separate arrangement — contact us and we will sort something reasonable out.
Purchases are processed by Gumroad, which handles payment, delivery, and receipts. We do not receive or store your payment details. Refunds are handled under Gumroad's refund process; if a purchase did not deliver correctly or the product isn't what you expected, contact us and we will make it right.
Articles, practice questions, calculators, and reference pages on this site are provided free of charge and without warranty. They may be updated or removed at any time.
We link to external resources — EPA, state agencies, and published references — because they are useful and authoritative. We do not control those sites and are not responsible for their content, accuracy, or availability. A link is not an endorsement, and the linked organization has not endorsed us.
To the fullest extent permitted by law, WastewaterAce.com is not liable for any indirect, incidental, or consequential damages arising from use of this site or its materials, including examination outcomes, employment decisions, or operational decisions made at a treatment facility. Any direct liability is limited to the amount you paid for the product in question.
We may update these terms as the site changes. The date at the top reflects the most recent revision. Continued use of the site after a change constitutes acceptance of the revised terms.
Questions about these terms, licensing, or anything else: get in touch.