100+ Free TX Water/Wastewater Operator Practice Questions
Pass your Texas Water/Wastewater Operator Certification Exam exam on the first try — instant access, no signup required.
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Key Facts: TX Water/Wastewater Operator Exam
Class D-A
License Levels
TCEQ
70%
Minimum Passing Score
TCEQ
$111
Application Fee
TCEQ
Up to 6 hrs
Exam Duration
TCEQ
20-32 hrs
CE Hours Per Renewal
TCEQ
About the TX Water/Wastewater Operator Exam
The Texas water/wastewater operator licensing exam administered by TCEQ tests knowledge of Texas Water Code Chapter 26, 30 TAC Chapter 30, water treatment operations, wastewater treatment processes, distribution and collection systems, and laboratory testing. Classes D through A are available for both water and wastewater licenses.
Questions
100 scored questions
Time Limit
Up to 6 hours
Passing Score
70%
Exam Fee
$111 (Texas Commission on Environmental Quality (TCEQ))
TX Water/Wastewater Operator Exam Content Outline
State Laws & Regulations
Texas Water Code Chapter 26, 30 TAC Chapter 30, TCEQ Class D-A requirements, and license types
Water Treatment
Disinfection, coagulation, filtration, CT calculations, and SDWA compliance
Wastewater Treatment
Activated sludge, sludge handling, NPDES/TPDES permits, biological treatment, and safety
Distribution & Collection
Cross-connection control, backflow prevention, pump operations, and hydraulics
Laboratory & Math
Water quality testing, sampling, math calculations, record-keeping, and reporting
How to Pass the TX Water/Wastewater Operator Exam
What You Need to Know
- Passing score: 70%
- Exam length: 100 questions
- Time limit: Up to 6 hours
- Exam fee: $111
Keys to Passing
- Complete 500+ practice questions
- Score 80%+ consistently before scheduling
- Focus on highest-weighted sections
- Use our AI tutor for tough concepts
TX Water/Wastewater Operator Study Tips from Top Performers
Frequently Asked Questions
What license classes does TCEQ offer for water/wastewater operators?
TCEQ offers Class D (entry-level), C, B, and A (highest) for both water system operators and wastewater operators. A Provisional Wastewater Class D is available for those without a HS diploma.
How much is the TCEQ licensing exam fee?
The application fee is $111. Once approved, you schedule at a CBT center. Some exams are up to 6 hours, so confirm the center can accommodate.
What is the Wastewater Class D entry requirement?
Wastewater Class D requires a high school diploma or GED with no work experience. A provisional Class D is available without a diploma, valid for 2 years.
Can education substitute for experience in Texas?
Yes, HS diploma/GED holders can substitute: 64 semester hours (or 80 training hours) = 2 years; 32 semester hours (or 40 training hours) = 1 year of work experience.
What education is needed for Class A water operator?
Class A requires a degree in chemistry, biology, engineering, microbiology, or similar discipline approved by TCEQ, plus 4 years of hands-on experience.