Answered
What is the difference between a Class D and Class C water license?
Class D is the entry-level Texas water license and needs no experience. Class C is the next grade up: it requires the Class D groundwork plus documented operating experience and a harder exam. Most small public water systems can be run by a Class D or C operator, depending on the system.
Last reviewed 2026-08-03
Class D
The entry license. No prior experience, two approved courses, and a closed-book exam. It lets you operate small public water systems and is where nearly everyone starts.
Class C
The next grade. It builds on Class D and adds a requirement for documented hands-on operating experience plus a more demanding exam. It opens up more systems and higher-responsibility roles.
Common questions
- Which comes first?
- Class D, the entry grade, comes before Class C.
- Does Class C need experience?
- Yes, documented operating experience, unlike Class D.
- Should I start with D?
- Almost everyone starts at Class D, then moves up to C.