TEXAS WASTEWATER CLASS A EXAMS QUESTIONS AND CORRECT ANSWERS (VERIFIED
ANSWERS) PLUS RATIONALES 2026 Q&A | INSTANT DOWNLOAD PDF
Core Domains
*- State Laws and Regulations (Texas Water Code Chapter 26, 30 TAC Chapter 30)*
- Wastewater Treatment Processes (Activated Sludge, Trickling Filters, Ponds)
- Sludge Treatment, Digestion, and Disposal
- Wastewater Collection Systems and Pumping Operations
- Laboratory Testing, Sampling, and Monitoring
- Wastewater Utilities Math and Calculations
- Safety Practices and Hazardous Materials Handling
- NPDES/TPDES Permit Compliance and Reporting
- Ethics and Professional Standards for Operators
- Troubleshooting and Critical Decision-Making in Real-World Scenarios
Introduction
This comprehensive assessment is designed to evaluate the knowledge and competencies required for Texas
Wastewater Class A operator licensure. The exam tests mastery of state regulations, treatment processes,
laboratory procedures, mathematical calculations, safety protocols, and ethical decision-making. All
questions are multiple-choice, with many presenting real-world scenarios that require critical thinking and
professional judgment. The assessment emphasizes applied knowledge over rote memorization, reflecting the
responsibilities of a chief operator managing complex wastewater treatment facilities. Success on this exam
demonstrates readiness to supervise operations, ensure regulatory compliance, and protect public health and
the environment.
,Section One: Questions 1–100
Question 1
What is the minimum passing score required for the Texas Wastewater Class A licensing exam administered by
TCEQ?
A. 60%
B. 65%
C. 70%
D. 75%
🟢 C. 70%
🔴 RATIONALE: The Texas Commission on Environmental Quality (TCEQ) sets the minimum passing score at
70% for all wastewater operator licensing exams, including Class A.
Question 2
Which of the following education paths qualifies an applicant for Texas Wastewater Class A licensure with only
4 years of hands-on experience?
A. High school diploma
B. Associate degree in environmental science
C. Bachelor's degree in chemistry
D. Master's degree in microbiology
,🟢 D. Master's degree in microbiology
🔴 RATIONALE: TCEQ requires a master's degree in chemistry, biology, engineering, microbiology,
bacteriology, or similar discipline plus 4 years of hands-on experience for Class A licensure. A bachelor's degree
requires 5 years, and a high school diploma requires 8 years.
Question 3
What is the maximum number of years of experience that can be substituted with college hours for applicants
with a high school diploma seeking Class A wastewater licensure?
A. 1 year
B. 2 years
C. 3 years
D. 4 years
🟢 B. 2 years
🔴 RATIONALE: Applicants with a high school diploma or GED may substitute up to 2 years of experience with
college hours or additional TCEQ-approved wastewater operator training (64 semester hours or 80 training
hours = 2 years).
, Question 4
Which Texas Administrative Code chapter governs wastewater operator licensing requirements?
A. 30 TAC Chapter 26
B. 30 TAC Chapter 30, Subchapter J
C. Texas Water Code Chapter 30
D. 30 TAC Chapter 25
🟢 B. 30 TAC Chapter 30, Subchapter J
🔴 RATIONALE: State licensing regulations for wastewater treatment plant and collection system operators are
found in 30 Texas Administrative Code, Chapter 30, Subchapter J.
Question 5
How many Continuing Education (CE) hours are required for renewal of a Texas wastewater operator license?
A. 15 hours
B. 20 hours
C. 30 hours
D. 40 hours
🟢 C. 30 hours
ANSWERS) PLUS RATIONALES 2026 Q&A | INSTANT DOWNLOAD PDF
Core Domains
*- State Laws and Regulations (Texas Water Code Chapter 26, 30 TAC Chapter 30)*
- Wastewater Treatment Processes (Activated Sludge, Trickling Filters, Ponds)
- Sludge Treatment, Digestion, and Disposal
- Wastewater Collection Systems and Pumping Operations
- Laboratory Testing, Sampling, and Monitoring
- Wastewater Utilities Math and Calculations
- Safety Practices and Hazardous Materials Handling
- NPDES/TPDES Permit Compliance and Reporting
- Ethics and Professional Standards for Operators
- Troubleshooting and Critical Decision-Making in Real-World Scenarios
Introduction
This comprehensive assessment is designed to evaluate the knowledge and competencies required for Texas
Wastewater Class A operator licensure. The exam tests mastery of state regulations, treatment processes,
laboratory procedures, mathematical calculations, safety protocols, and ethical decision-making. All
questions are multiple-choice, with many presenting real-world scenarios that require critical thinking and
professional judgment. The assessment emphasizes applied knowledge over rote memorization, reflecting the
responsibilities of a chief operator managing complex wastewater treatment facilities. Success on this exam
demonstrates readiness to supervise operations, ensure regulatory compliance, and protect public health and
the environment.
,Section One: Questions 1–100
Question 1
What is the minimum passing score required for the Texas Wastewater Class A licensing exam administered by
TCEQ?
A. 60%
B. 65%
C. 70%
D. 75%
🟢 C. 70%
🔴 RATIONALE: The Texas Commission on Environmental Quality (TCEQ) sets the minimum passing score at
70% for all wastewater operator licensing exams, including Class A.
Question 2
Which of the following education paths qualifies an applicant for Texas Wastewater Class A licensure with only
4 years of hands-on experience?
A. High school diploma
B. Associate degree in environmental science
C. Bachelor's degree in chemistry
D. Master's degree in microbiology
,🟢 D. Master's degree in microbiology
🔴 RATIONALE: TCEQ requires a master's degree in chemistry, biology, engineering, microbiology,
bacteriology, or similar discipline plus 4 years of hands-on experience for Class A licensure. A bachelor's degree
requires 5 years, and a high school diploma requires 8 years.
Question 3
What is the maximum number of years of experience that can be substituted with college hours for applicants
with a high school diploma seeking Class A wastewater licensure?
A. 1 year
B. 2 years
C. 3 years
D. 4 years
🟢 B. 2 years
🔴 RATIONALE: Applicants with a high school diploma or GED may substitute up to 2 years of experience with
college hours or additional TCEQ-approved wastewater operator training (64 semester hours or 80 training
hours = 2 years).
, Question 4
Which Texas Administrative Code chapter governs wastewater operator licensing requirements?
A. 30 TAC Chapter 26
B. 30 TAC Chapter 30, Subchapter J
C. Texas Water Code Chapter 30
D. 30 TAC Chapter 25
🟢 B. 30 TAC Chapter 30, Subchapter J
🔴 RATIONALE: State licensing regulations for wastewater treatment plant and collection system operators are
found in 30 Texas Administrative Code, Chapter 30, Subchapter J.
Question 5
How many Continuing Education (CE) hours are required for renewal of a Texas wastewater operator license?
A. 15 hours
B. 20 hours
C. 30 hours
D. 40 hours
🟢 C. 30 hours
