Answered
Do I need a license to work at a water treatment plant in Texas?
Yes. Texas requires anyone who produces or distributes public drinking water to hold the proper TCEQ operator license, starting with the entry-level Class D. A trainee can work under a licensed operator while earning hours, but the person responsible for operating the system must be licensed for its class.
Last reviewed 2026-08-03
Who must be licensed
Operators of public water systems must hold a TCEQ license at or above the grade the system requires. The license is how the state confirms the person running the plant knows how to keep the water safe.
Starting as a trainee
You can begin working under a licensed operator and earn experience toward higher grades, but you still need your own Class D license to be an operator of record. It is the entry point, and it needs no prior experience.
Common questions
- Can I work without any license?
- Only as a trainee under a licensed operator; the operator of record must be licensed.
- What license do I start with?
- The entry-level Class D.
- Does Class D need experience?
- No prior experience is required.