TCEQ Class C Water License Exam – Complete
Questions and Answers Texas Commission on
Environmental Quality (TCEQ) Full Study Guide with
100% Pass Rate
TCEQ Class C Water License Exam – Complete Study Guide Texas Commission
on Environmental Quality (TCEQ) Questions with Verified Answers
EXAM OVERVIEW
The TCEQ Class C Water License Exam is designed for water system operators
responsible for operating and maintaining public water systems in Texas . The
exam assesses knowledge of water treatment processes, distribution systems, water
quality, regulations, safety procedures, disinfection, sampling, equipment
operation, and environmental compliance .
Key Exam Details:
- Format: Computer-Based Testing (CBT)
- Time Limit: 3 hours
- Passing Score: 70%
- License Renewal: Every 3 years
- Applicable Regulations: 30 TAC 290, SDWA, RTCR, SWTR
1
,SECTION 1: REGULATIONS & COMPLIANCE
Question 1
Under TCEQ rules, what is the maximum allowable lead content for "lead-free"
pipes and fittings?
A) 0.2% lead
B) 0.25% lead
C) 0.5% lead
D) 0.25% weighted average lead
Correct Answer: D
Explanation: The Reduction of Lead in Drinking Water Act defines lead-free as
≤0.25% weighted average for wetted surfaces. Solder and flux must be ≤0.2% lead
.
Question 2
2
,A Tier 1 Public Notice for E. coli contamination must be issued within how many
hours?
A) 8 hours
B) 24 hours
C) 48 hours
D) 72 hours
Correct Answer: B
Explanation: Tier 1 violations (acute health risks) require public notice within 24
hours via radio, TV, or hand delivery. Tier 2 violations require notice within 30
days. E. coli positive samples, major turbidity violations, or failure to maintain
minimum chlorine residual are Tier 1 violations .
Question 3
The maximum contaminant level (MCL) for Total Trihalomethanes (TTHMs) is:
A) 40 µg/L
B) 60 µg/L
C) 80 µg/L
3
, D) 100 µg/L
Correct Answer: C
Explanation: The EPA/TCEQ MCL for TTHMs is 0.080 mg/L (80 µg/L) as a
running annual average .
Question 4
The Safe Drinking Water Act (SDWA) amendments of 1996 require a water system
to conduct:
A) Annual taste tests
B) A Consumer Confidence Report (CCR)
C) Monthly board meetings
D) Chlorine odor surveys
Correct Answer: B
Explanation: The Consumer Confidence Report (CCR) must be delivered to
customers annually by July 1, detailing water source, contaminants, and violations
.
4
Questions and Answers Texas Commission on
Environmental Quality (TCEQ) Full Study Guide with
100% Pass Rate
TCEQ Class C Water License Exam – Complete Study Guide Texas Commission
on Environmental Quality (TCEQ) Questions with Verified Answers
EXAM OVERVIEW
The TCEQ Class C Water License Exam is designed for water system operators
responsible for operating and maintaining public water systems in Texas . The
exam assesses knowledge of water treatment processes, distribution systems, water
quality, regulations, safety procedures, disinfection, sampling, equipment
operation, and environmental compliance .
Key Exam Details:
- Format: Computer-Based Testing (CBT)
- Time Limit: 3 hours
- Passing Score: 70%
- License Renewal: Every 3 years
- Applicable Regulations: 30 TAC 290, SDWA, RTCR, SWTR
1
,SECTION 1: REGULATIONS & COMPLIANCE
Question 1
Under TCEQ rules, what is the maximum allowable lead content for "lead-free"
pipes and fittings?
A) 0.2% lead
B) 0.25% lead
C) 0.5% lead
D) 0.25% weighted average lead
Correct Answer: D
Explanation: The Reduction of Lead in Drinking Water Act defines lead-free as
≤0.25% weighted average for wetted surfaces. Solder and flux must be ≤0.2% lead
.
Question 2
2
,A Tier 1 Public Notice for E. coli contamination must be issued within how many
hours?
A) 8 hours
B) 24 hours
C) 48 hours
D) 72 hours
Correct Answer: B
Explanation: Tier 1 violations (acute health risks) require public notice within 24
hours via radio, TV, or hand delivery. Tier 2 violations require notice within 30
days. E. coli positive samples, major turbidity violations, or failure to maintain
minimum chlorine residual are Tier 1 violations .
Question 3
The maximum contaminant level (MCL) for Total Trihalomethanes (TTHMs) is:
A) 40 µg/L
B) 60 µg/L
C) 80 µg/L
3
, D) 100 µg/L
Correct Answer: C
Explanation: The EPA/TCEQ MCL for TTHMs is 0.080 mg/L (80 µg/L) as a
running annual average .
Question 4
The Safe Drinking Water Act (SDWA) amendments of 1996 require a water system
to conduct:
A) Annual taste tests
B) A Consumer Confidence Report (CCR)
C) Monthly board meetings
D) Chlorine odor surveys
Correct Answer: B
Explanation: The Consumer Confidence Report (CCR) must be delivered to
customers annually by July 1, detailing water source, contaminants, and violations
.
4
