Answered
What is a Class D water operator?
A Class D water operator holds the entry-level Texas license to operate a public water system. It is the first grade above no license, requires no prior experience, and is earned by completing two TCEQ-approved courses and passing a closed-book exam. Operators move up to Class C, B, and A from there.
Last reviewed 2026-08-03
What the license lets you do
It qualifies you to operate small public water systems in Texas: the day-to-day work of producing and distributing safe drinking water at a small utility, water supply corporation, or similar system.
Where it sits
Class D is the bottom rung of four Texas water grades. As you gain documented operating hours and pass higher exams, you move to Class C, then B, then A, at larger systems and higher pay.
Common questions
- Is Class D the entry-level license?
- Yes, it is the first Texas water operator grade.
- Do I need experience for it?
- No prior experience is required for Class D.
- What comes after Class D?
- Class C, then B, then A, as you gain hours and pass higher exams.