GREPA: Providing innovative and affordable training solutions for the water industry.

Practice Exams (Earn 3 Contact hours!)

Get well prepared while you earn contact hours with these new innovative practice exam tools. Exams are categorized by knowledge domain to enhance targeted study, and provide the operator significant flexibility. Tests can be taken online and the test forms can be downloaded and printed to streamline exam preparation. California, Arizona, and Nevada Distribution and Treatment Operators can qualify to earn 3 contact hours.

Purchase or view practice tests

Interactive Water Math Made Easy Training Manual - Coming Soon

We are currently upgrading our Water Math Made Easy manual to become an interactive digital resource with videos and ability to engage in math quizzes online. The Water Math Made easy manual is designed for self-study or classroom use and covers the full range of math that operators will encounter on the job or in a testing situation. The topics start on a basic level and continue to build on previously mastered concepts so that acquiring the necessary math skills is made easy. This is the same method we have successfully used in the classroom for the last 12 years and it has been highly popular. Pre-purchase the interactive manual now at the introductory rate of $19.99 - release date is mid November 2018.

Learn more about our Math Manuals

Training, Consultation and Custom Services

GREPA has been delivering onsite training, technical assistance and consultation for water systems since 2007. During that time we have helped 100's of communities build their technical, managerial and financial capacity and have trained literally thousands of operators to achieve certification and improve their careers.  We have worked in many locations including, CA, AZ, NV, NM, ND, MT, and overseas. Contact us to schedule a training event for your employees, or for assistance in improving the capacity of your utility.

Schedule your training and consultation today


Since 2007, GREPA has been providing exceptional training at the most affordable cost for communities small and large. We provide educational resources, training, and consultation focused on empowering individuals and improving the technical, managerial, and financial capacity of utilities, environmental and public health programs.


Working from as-built maps to create a an asset management plan
Working from as-built maps to create a an asset management plan

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Do you, your operators, or your board members need contact hours or training for a special project? You can submit an online training request; we will provide a bid and work with you to make the project a success.

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International Drinking Water & Wastewater Professionals Association