TEXAS CLASS D WATER LICENSE EXAM NEWEST 2025
ACTUAL EXAM TEST BANK| COMPLETE 450 REAL
EXAM QUESTIONS AND CORRECT VERIFIED ANSWERS/
ALREADY GRADED A+ (BRAND NEW!!)
Q1. In Texas, all public water systems must have which type of
facilities?
A) Filtration
B) Fluoridation
C) Chlorination
D) Softening
Correct Answer: C
Rationale: TCEQ rules (30 TAC 290) require chlorination
facilities for all public water systems to ensure disinfection and
protect public health .
Q2. The Safe Drinking Water Act (SDWA) sets standards for
drinking water including which characteristics?
A) Physical and chemical only
B) Bacteriological only
C) Physical, chemical, bacteriological, and radiological
D) Radiological only
1
,Correct Answer: C
Rationale: The SDWA establishes standards for all four
categories: physical (taste, odor), chemical (pH, metals),
bacteriological (coliform bacteria), and radiological (radon,
radium) .
Q3. Which Texas agency assumed primacy over the Safe
Drinking Water Act from the EPA in 1978?
A) Texas Water Commission
B) Texas Department of Health (TDH)
C) Texas Railroad Commission
D) Texas Parks and Wildlife
Correct Answer: B
Rationale: Primacy was initially given to the Texas Department
of Health before being transferred to TCEQ. The TDH had
authority from 1978 until later transfer .
Q4. The primary state regulator of water utilities in Texas is the:
A) EPA
B) TCEQ
C) AWWA
D) TWUA
2
,Correct Answer: B
Rationale: The Texas Commission on Environmental Quality
(TCEQ) is the primary state agency responsible for regulating
water utilities, issuing permits, and enforcing water quality
standards .
Q5. What is the maximum time a Class D license is valid for a
system with 250 connections or less?
A) 1 year
B) 2 years
C) 3 years
D) 5 years
Correct Answer: C
Rationale: Unlike higher licenses that renew annually, Class D
licenses for small systems (ground and purchase water systems
with 250 connections or less) are valid for three years .
Q6. "Potable" water means:
A) Water that tastes good
B) Water that is safe to drink and has a measurable chlorine
residual
C) Distilled water only
D) Water that is soft
3
, Correct Answer: B
Rationale: "Potable" defines water that is safe for human
consumption and has a measurable chlorine residual. "Palatable"
refers to taste. Safety and disinfection are the key requirements .
Q7. The "Rule of Capture" in Texas water law means:
A) You must capture rainwater
B) A landowner can pump as much groundwater as they want,
even if it drains their neighbor's well
C) Water must be captured in storage tanks
D) You cannot pump more than your permit allows
Correct Answer: B
Rationale: Texas follows the "Rule of Capture" (like a right of
capture), though some groundwater conservation districts impose
limits. This allows landowners to pump groundwater from
beneath their land without liability for depleting neighbors'
wells .
Q8. All community and non-transient non-community public water
systems, regardless of source, must be under the supervision of a:
A) Licensed professional engineer
B) Licensed water works operator
4
ACTUAL EXAM TEST BANK| COMPLETE 450 REAL
EXAM QUESTIONS AND CORRECT VERIFIED ANSWERS/
ALREADY GRADED A+ (BRAND NEW!!)
Q1. In Texas, all public water systems must have which type of
facilities?
A) Filtration
B) Fluoridation
C) Chlorination
D) Softening
Correct Answer: C
Rationale: TCEQ rules (30 TAC 290) require chlorination
facilities for all public water systems to ensure disinfection and
protect public health .
Q2. The Safe Drinking Water Act (SDWA) sets standards for
drinking water including which characteristics?
A) Physical and chemical only
B) Bacteriological only
C) Physical, chemical, bacteriological, and radiological
D) Radiological only
1
,Correct Answer: C
Rationale: The SDWA establishes standards for all four
categories: physical (taste, odor), chemical (pH, metals),
bacteriological (coliform bacteria), and radiological (radon,
radium) .
Q3. Which Texas agency assumed primacy over the Safe
Drinking Water Act from the EPA in 1978?
A) Texas Water Commission
B) Texas Department of Health (TDH)
C) Texas Railroad Commission
D) Texas Parks and Wildlife
Correct Answer: B
Rationale: Primacy was initially given to the Texas Department
of Health before being transferred to TCEQ. The TDH had
authority from 1978 until later transfer .
Q4. The primary state regulator of water utilities in Texas is the:
A) EPA
B) TCEQ
C) AWWA
D) TWUA
2
,Correct Answer: B
Rationale: The Texas Commission on Environmental Quality
(TCEQ) is the primary state agency responsible for regulating
water utilities, issuing permits, and enforcing water quality
standards .
Q5. What is the maximum time a Class D license is valid for a
system with 250 connections or less?
A) 1 year
B) 2 years
C) 3 years
D) 5 years
Correct Answer: C
Rationale: Unlike higher licenses that renew annually, Class D
licenses for small systems (ground and purchase water systems
with 250 connections or less) are valid for three years .
Q6. "Potable" water means:
A) Water that tastes good
B) Water that is safe to drink and has a measurable chlorine
residual
C) Distilled water only
D) Water that is soft
3
, Correct Answer: B
Rationale: "Potable" defines water that is safe for human
consumption and has a measurable chlorine residual. "Palatable"
refers to taste. Safety and disinfection are the key requirements .
Q7. The "Rule of Capture" in Texas water law means:
A) You must capture rainwater
B) A landowner can pump as much groundwater as they want,
even if it drains their neighbor's well
C) Water must be captured in storage tanks
D) You cannot pump more than your permit allows
Correct Answer: B
Rationale: Texas follows the "Rule of Capture" (like a right of
capture), though some groundwater conservation districts impose
limits. This allows landowners to pump groundwater from
beneath their land without liability for depleting neighbors'
wells .
Q8. All community and non-transient non-community public water
systems, regardless of source, must be under the supervision of a:
A) Licensed professional engineer
B) Licensed water works operator
4
