TCEQ CLASS D WATER OPERATOR
LICENSE EXAM 2026 WITH 150 REAL
EXAM QUESTIONS AND CORRECT
ANSWERS/ TEXAS CLASS C WATER
OPERATOR EXAM 2026/2027 LATEST
(NEW!!)
SECTION 1: Water Systems & Regulations (Questions 1-20)
Question 1
Which Texas state agency is responsible for enforcing the Safe Drinking
Water Program?
A. Texas Department of Health
B. Texas Commission on Environmental Quality (TCEQ)
C. Texas Water Development Board
D. Environmental Protection Agency
Correct ,,,,answer,,: B — Texas Commission on Environmental
Quality (TCEQ)
Rationale: The TCEQ is the state agency responsible for enforcing the
Safe Drinking Water Program in Texas, ensuring public water systems
comply with state and federal regulations.
,Question 2
According to TCEQ regulations, a public water system must serve at
least how many service connections to be classified as a regulated
public water supply?
A. 10 service connections
B. 15 service connections or 25 individuals for at least 60 days per year
C. 25 service connections
D. 50 service connections
Correct ,,,,answer,,: B — 15 service connections or 25 individuals for
at least 60 days per year
Rationale: Under TCEQ rules, a public water system must serve at least
15 service connections or 25 individuals for at least 60 days per year to
be classified as a regulated public water supply.
Question 3
What is the minimum passing score required for the TCEQ water
operator licensing exam?
A. 60%
B. 70%
C. 75%
D. 80%
Correct ,,,,answer,,: B — 70%
Rationale: Applicants must pass the applicable exam with a minimum
score of 70 percent.
,Question 4
How often must a TCEQ water operator license be renewed?
A. Annually
B. Every 2 years
C. Every 3 years
D. Every 5 years
Correct ,,,,answer,,: C — Every 3 years
Rationale: TCEQ water operator licenses must be renewed every 3
years.
Question 5
What is the "rule of capture" in Texas water law?
A. A regulation limiting groundwater pumping
B. A law allowing a landowner to pump groundwater from a well even if it
drains water from beneath neighboring land
C. A rule requiring permits for all wells
D. A regulation protecting surface water rights
Correct ,,,,answer,,: B — A law allowing a landowner to pump
groundwater from a well even if it drains water from beneath
neighboring land
Rationale: The "rule of capture" allows a landowner to pump
groundwater from a well even if doing so drains water from beneath
neighboring land.
, Question 6
What is the minimum normal operating pressure required for a public
water supply system?
A. 20 psi
B. 25 psi
C. 35 psi
D. 50 psi
Correct ,,,,answer,,: C — 35 psi
Rationale: A public water supply system should maintain a minimum of
normal operating pressure of 35 psi.
Question 7
According to TCEQ regulations, what is the minimum residual pressure a
water system must maintain during emergency conditions?
A. 10 psi
B. 20 psi
C. 30 psi
D. 35 psi
Correct ,,,,answer,,: B — 20 psi
Rationale: A public water supply system must maintain a residual
pressure of 20 psi during emergency conditions.
Question 8
Class D water operator licenses are NOT renewable for operators at
which type of facility?
LICENSE EXAM 2026 WITH 150 REAL
EXAM QUESTIONS AND CORRECT
ANSWERS/ TEXAS CLASS C WATER
OPERATOR EXAM 2026/2027 LATEST
(NEW!!)
SECTION 1: Water Systems & Regulations (Questions 1-20)
Question 1
Which Texas state agency is responsible for enforcing the Safe Drinking
Water Program?
A. Texas Department of Health
B. Texas Commission on Environmental Quality (TCEQ)
C. Texas Water Development Board
D. Environmental Protection Agency
Correct ,,,,answer,,: B — Texas Commission on Environmental
Quality (TCEQ)
Rationale: The TCEQ is the state agency responsible for enforcing the
Safe Drinking Water Program in Texas, ensuring public water systems
comply with state and federal regulations.
,Question 2
According to TCEQ regulations, a public water system must serve at
least how many service connections to be classified as a regulated
public water supply?
A. 10 service connections
B. 15 service connections or 25 individuals for at least 60 days per year
C. 25 service connections
D. 50 service connections
Correct ,,,,answer,,: B — 15 service connections or 25 individuals for
at least 60 days per year
Rationale: Under TCEQ rules, a public water system must serve at least
15 service connections or 25 individuals for at least 60 days per year to
be classified as a regulated public water supply.
Question 3
What is the minimum passing score required for the TCEQ water
operator licensing exam?
A. 60%
B. 70%
C. 75%
D. 80%
Correct ,,,,answer,,: B — 70%
Rationale: Applicants must pass the applicable exam with a minimum
score of 70 percent.
,Question 4
How often must a TCEQ water operator license be renewed?
A. Annually
B. Every 2 years
C. Every 3 years
D. Every 5 years
Correct ,,,,answer,,: C — Every 3 years
Rationale: TCEQ water operator licenses must be renewed every 3
years.
Question 5
What is the "rule of capture" in Texas water law?
A. A regulation limiting groundwater pumping
B. A law allowing a landowner to pump groundwater from a well even if it
drains water from beneath neighboring land
C. A rule requiring permits for all wells
D. A regulation protecting surface water rights
Correct ,,,,answer,,: B — A law allowing a landowner to pump
groundwater from a well even if it drains water from beneath
neighboring land
Rationale: The "rule of capture" allows a landowner to pump
groundwater from a well even if doing so drains water from beneath
neighboring land.
, Question 6
What is the minimum normal operating pressure required for a public
water supply system?
A. 20 psi
B. 25 psi
C. 35 psi
D. 50 psi
Correct ,,,,answer,,: C — 35 psi
Rationale: A public water supply system should maintain a minimum of
normal operating pressure of 35 psi.
Question 7
According to TCEQ regulations, what is the minimum residual pressure a
water system must maintain during emergency conditions?
A. 10 psi
B. 20 psi
C. 30 psi
D. 35 psi
Correct ,,,,answer,,: B — 20 psi
Rationale: A public water supply system must maintain a residual
pressure of 20 psi during emergency conditions.
Question 8
Class D water operator licenses are NOT renewable for operators at
which type of facility?
