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Free tool · Water & wastewater · Rules checked Oct 30, 2026

Texas Water Operator License Requirements Checker

TL;DR: Enter your education, experience and completed courses to see which TCEQ water or wastewater license class (D to A) you meet and what you still need. Rules follow 30 TAC Chapter 30 as checked on Oct 30, 2026. Always confirm with TCEQ.

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Which TCEQ license can you apply for today: Class D, C, B or A? Enter your education, experience and the approved courses you’ve finished. We check it against the Texas rules and show exactly what’s missing for the next class.

1License type
Class C and B water licenses are issued by field. At least half of your experience must be in that field.
2Education and experience
Degree substitutions need a major in chemistry, biology, engineering, microbiology, bacteriology or a TCEQ-approved similar field.
Count hands-on work at a public water system or wastewater plant. 12 months = 1 year.
16 semester hours = 6 months of experience.
Hours beyond your required courses. 20 hours = 6 months of experience.
3TCEQ training completed

Tick each TCEQ-approved course (or approved equivalent) you’ve finished.

Only Class A sets an hour total: 186 hours (water) or 160 hours (wastewater).

Always confirm with TCEQ. This tool is an unofficial guide based on the rules below, not a license decision. TCEQ decides which experience, degrees and courses count, and rules can change. Check tceq.texas.gov or email licenses@tceq.texas.gov before you apply.

Texas water and wastewater operator license requirements at a glance

ClassWater: education + experienceWater: trainingWastewater: education + experienceWastewater: training
Class DDiploma or GED; no experienceBasic Water Operations + Resiliency OverviewDiploma or GED; no experienceBasic Wastewater Operation
Class CDiploma or GED + 2 years (1 hands-on)Track courses (surface, ground or distribution) + ResiliencyDiploma or GED + 2 yearsBasic Wastewater, Activated Sludge or WW Treatment + 1 elective
Class BDiploma or GED + 5 years (3 hands-on), or science bachelor’s + 2.5 yearsTrack courses incl. Safety + ResiliencyDiploma or GED + 5 years (3 hands-on), or science bachelor’s + 2.5 yearsBasic, Treatment, Collection, Lab, Safety + 1 elective
Class ADiploma or GED + 8 years (6 hands-on), science bachelor’s + 5, or master’s + 49 core courses, 186 hours totalDiploma or GED + 8 years (6 hands-on), science bachelor’s + 5, or master’s + 46 core courses + 1 elective, 160 hours total

Rules the checker uses

  • Experience substitution: 16 college semester hours or 20 extra hours of approved training count as six months of experience. Class C can substitute up to 1 year; Class B and A up to 2 years. The checker applies this on the diploma/GED path, as TCEQ’s pages describe.
  • Field experience: for Class C and B, at least half your experience must be in the field you’re licensing in (surface water, groundwater, distribution or wastewater treatment). Wastewater: related experience counts at 50%, and collection-system experience counts as half toward a treatment license.
  • No diploma or GED: you can get a Provisional Class D (water or wastewater), valid for 2 years, then upgrade.
  • Exam and fee: pass the TCEQ exam with 70% or more. Application fee $111 ($74 for provisional Class D). Lab experience only counts at a lab owned by the system with daily operator consultation.

Sources (checked October 30, 2026):

  1. 30 TAC §30.390, Qualifications for Initial License (water, Subchapter K)
  2. 30 TAC §30.340, Qualifications for Initial License (wastewater, Subchapter J)
  3. TCEQ: Occupational Licenses, Water System Operators
  4. TCEQ: Occupational Licenses, Wastewater Treatment Plant and Collection System Operators
  5. TCEQ: Requirements for a Wastewater Treatment License (PDF, rev. 5/30/2025)

Exam prep

Study resources are coming soon. We’re reviewing practice exams and prep courses for the Texas Class D, C, B and A exams. Until then, TCEQ suggests studying the training manuals for your required courses and TCEQ’s “need-to-know” criteria for each license.

Find a job at your level

Class D jobsClass C jobsClass B jobsClass A jobsTexas license guide

FAQ

What are the requirements for a TCEQ Class D water license?

A high school diploma or GED, the Basic Water Operations and Resiliency Overview courses, and a passing exam score (70% or higher). No work experience is required. Without a diploma or GED you can apply for a Provisional Water Class D, valid for 2 years.

How much experience do I need for a Texas Class C water or wastewater license?

Two years of operating experience with a high school diploma or GED. You can substitute up to one year with college hours or extra approved training: 16 semester hours or 20 extra training hours equal six months. For water Class C, one of the two years must be hands-on.

Can a college degree replace experience for Class B or A?

Yes, if the degree major is chemistry, biology, engineering, microbiology, bacteriology or a similar discipline approved by TCEQ. Class B needs 2.5 years with such a bachelor’s degree (5 with a diploma or GED). Class A needs 4 years with a master’s, 5 with a bachelor’s, or 8 with a diploma or GED.

How many training hours does a Class A license need?

Class A water needs the listed core courses plus extra training to reach 186 hours. Class A wastewater needs the core courses, one elective and extra training to reach 160 hours.

What score do I need to pass the TCEQ operator exam?

At least 70 percent. The application fee is $111 ($74 for a provisional Class D).