Workbooks
Downloadable study workbooks for water and wastewater operator certification prep. Available now and coming soon.
Grade 1 Water Treatment Study Workbook
A foundational study workbook aligned to Grade 1 water treatment certification topics, with condensed notes and visual study guides.
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PDF DownloadWater Treatment
Grade 1 Water Distribution Study Workbook
A study workbook covering Grade 1 water distribution concepts, including piping, hydraulics, storage, and disinfection basics.
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PDF DownloadDistribution
Operator Math and Conversions Workbook
A practical math workbook for operators covering unit conversions, flow, dosage, pressure, and common certification math problems.
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PDF DownloadMath
Practice Quiz Pack
A pack of practice quizzes to reinforce operator certification study. Planned for a future phase of OLI.
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InteractivePractice Tools