AWWA Opcert Exam Prep App

AWWA Opcert Exam Prep App

  • Developed by water industry experts
  • See answer explanations, including equations & formulas
  • Track your progress with charts & detailed results
  • Available on Apple App Store, Google Play, and web app
  • Enroll in free 3-day trial to see all subscription content


6- or 12-month subscriptions may be purchased for access to ALL content.


Grades 1 & 2
Includes 550+ Questions


Grades 1, 2, 3 & 4
Includes 250+ Questions


Grades 3 & 4
Includes 650+ Questions


Grades 1, 2, 3 & 4
Includes 250+ Questions


Grades 1 & 2
Includes 500+ Questions


200+ Questions Covering: Measuring, Converting, Hydraulics & Pumping


Grades 3 & 4
Includes 250+ Questions

I'll be using it quite a bit... it's really easy to look at my phone to study when I have down time.

Dylan, Water Operator in Parker, CO

I'm always trying to find time to study and this will help... I'd use it everyday.

Tony, Water Treatment Operator Class D

Much love to AWWA and all of their staff continuing to do great things for our industry!

Steve, Waterwisepro Training

Study Anywhere, Anytime

Offline access allows you to study on the go, wherever it is the most convenient for you.

Detailed Answers Included

Every math question includes a detailed explanation of the answer so you can learn from your mistakes.

Track your Progress

Understand where you need to focus with detailed exam results and cumulative history charts.

Vetted by Industry Experts

Q&As have been reviewed by water industry experts. Meets the latest ABC Need-to-Know Criteria.

Frequently Asked Questions

How do I purchase practice question sets?

You may purchase subscription access to all question sets on the web app or through in-app purchasing on the iOS or Android AWWA Opcert Exam Prep.

How do I know which set will help me prepare for my state’s exam?

Certification requirements vary by state or provincial. Many states follow guidelines from the Association of Boards of Certification (ABC) in their operator exams. Questions marked "Introductory" are designed to aid operators in studying for ABC grades 1 and 2 exams; questions marked "Advanced" are geared toward ABC grades 3 and 4 exams. The Math Refresher question set provides practice in operator math which can apply across all grades. For more information, visit the website of your local water operator certification authority.

What’s the difference between the Opcert Exam Prep app and the book?

The question sets available for Water Treatment and Water Distribution contain over 2200 questions; in the Water Operator Certification Exam Prep book, a subset of 1400 of these questions are included. The question sets available for Wastewater contain over 550 questions; in the Wastewater Operator Certification Exam Prep book, all of these questions are included. Additional features of the app include the ability to track your progress, randomize question orders and see detailed answer explanations.

How long do I have access to purchased questions?

You may choose to purchase a 6-month or 12-month subscription to the content on the AWWA Opcert Exam Prep app. Subscriptions are non-recurring.

Who can I contact if I have a question?

For issues with subscriptions purchased through the web app at, please contact For issues with subscriptions purchased through in-app purchasing, please contact your app store. For questions about content, please contact

Can I use Opcert Exam Prep across multiple devices?

Yes, activity and purchases will sync across multiple devices. The same sign-in information for the mobile app will also work for the web (desktop) app. (Please note that sharing access with other individuals may result in the rescinding of access with no refund.)

What references can I read to accompany the Opcert Exam Prep?

To learn the content tested on operator certification exams, we recommend the AWWA WSO (Water System Operations) series of books and videos.

How do I reset my progress through the questions?

You can reset your progress (progress bars, record of questions answered correctly) at any time by going to Profile and clicking Reset Progress.