Texas Water & Wastewater Operator Certification Guide

Decision 1

Choose the work before choosing the exam.

Drinking water

Public water system operators follow TCEQ class-specific training, education, and experience rules. The official program page currently lists a 70% passing standard and a state application fee for new water licenses.

Treatment: source water, process control, filtration, disinfection, laboratory work.
Distribution: pumps, storage, pressure, mains, valves, sampling, flushing.

Study treatment · Study distribution

Wastewater

Wastewater treatment and collection licenses have separate class requirements. Some approved college or additional training may substitute for limited experience, depending on the class.

Treatment: biological and physical processes, solids, disinfection, compliance.
Collections: sewers, lift stations, force mains, I&I, cleaning, overflow response.

Study treatment · Study collections

Do not pay yet: Do not buy a generic “Texas operator course” until you know the exact license type and class required by your job or target facility.

Decision 2

Build the application record in the right order.

Credential map: Public water system operator and wastewater treatment/collection licenses, generally progressing through Classes D, C, B, and A

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Confirm the exact field and class. Ask the facility or job posting for the credential name—not simply “water license.”Open the current agency requirements. Compare education, approved training, experience, and any class prerequisites.Separate exam approval from certification approval. An application receipt or passing score may not be an active certificate.Gather records before applying. Save transcripts, course certificates, job descriptions, dates, hours, facility class, duties, and supervisor contacts.Use the current application and payment instructions. Do not mail an old form or rely on a cached third-party fee table.Schedule only after approval where required. Verify identification, calculator, formula sheet, appointment, and retest rules.Complete the certificate step. Identify the exact water or wastewater license, complete required courses, document experience, submit the TCEQ application and fee, receive exam eligibility, schedule the exam, and pass.Record renewal and continuing-education dates. Save approved hours as you earn them.

Decision 3

Study from the state outline, then diagnose weak operator topics.

Texas exam note

TCEQ uses computer-based testing for many occupational licenses. Apply and receive approval before treating the testing vendor step as complete.

Decision 4

Make the job produce qualifying experience.

Before accepting or paying for training, ask the employer or program these exact questions:

Which certificate, class, and facility classification does this role support?
Which daily duties count as operating experience—and which duties do not?
Who will supervise and sign the experience verification?
How are hours, shift assignments, process duties, and dates recorded?
Does the employer pay for approved training, exams, renewals, or higher-grade preparation?

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Primary sources

Open the agency page before submitting or paying.

Last reviewed: July 13, 2026. State pages and current forms control if this guide differs.

Texas water and wastewater operator certification