California T1 Water Treatment Operator Practice Test
Entry-level practice for the California SWRCB Division of Drinking Water (DDW) T1 Water Treatment Operator certification — the first grade in California's five-tier treatment ladder. No prior work experience required. Covers SWRCB DDW agency basics, Title 22 CCR introduction, basic plant components, disinfection, sampling, operator math, and California-specific awareness items at the depth a brand-new T1 candidate is expected to know. Calibrated to California DDW Drinking Water Treatment Exam Expected Range of Knowledge rev. April 2020.
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Browse all testsBoth options pull from the same 58-question bank. The quick quiz randomly selects 25 questions each time you take it.
California T1 Water Treatment Operator Practice Test
About this practice test
This California T1 Water Treatment Operator Practice Test practice test is a free study tool for water operators preparing for state and national certification exams. The 58 questions on this exam cover the most common topics tested at this level, and every question comes with a plain-English explanation so you can actually learn the material.
If you're studying for the certification exam, we recommend taking this test once, reviewing the explanations for any questions you missed, and then taking it again later. You can also explore the other practice tests covering specific topics like disinfection, filtration, and operator math. If you want a structured walk-through of what to study and in what order, see our 30-day study plan.