Page 1 of 91
TEXAS CLASS D WATER LICENSE 2026 EXAM
BANK ALL COMPLETE CURRENT TESTING
QUESTIONS AND DETAILED CORRECT
ANSWERS (VERIFIED) GUARANTEED
PASS/TOP-RATED A+.
WATER LICENSE
Maximize your success on the Texas Class D Water License exam
with focused preparation that strengthens your understanding of
basic water treatment, disinfection, safe distribution practices,
and Texas Commission on Environmental Quality (TCEQ)
regulations for small public water systems. It is specifically
designed for water operators in Texas seeking certification to
manage a Class D ground or surface water facility.
Operators have a responsibility to provide drinking water that
meets federal and state
standards. (true/false) ✓ ✓...... ANSWER ....... true
Water must be disinfected, delivered at inadequate
pressure, and be ample in quantity. (true/false) ✓ ✓......
ANSWER ....... false (adequate pressure)
, Page 2 of 91
Utility employees should guard the water supply and
facilities from contamination, public
tours, and even terrorism. (true/false) ✓ ✓...... ANSWER
....... false (public tours)
The state requires bacteriological sample results be kept
_____ years. ✓ ✓...... ANSWER ....... 5 years
The state requires chemical analysis be kept at least _____
years. ✓ ✓...... ANSWER ....... 10 years
EPA requires a water system to keep a copy of each
consumer confidence report at least _____
years. ✓ ✓...... ANSWER ....... 5 years
A public water system provides the public with piped water
for human consumption, serves
at least _____ service connections, and regularly serves at
least _____ individuals daily at least _____
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days out of the year. ✓ ✓...... ANSWER ....... 15 service
connections
25 individuals
60 days out of the year
The water utility field affects everyone because _____. ✓
✓...... ANSWER ....... water is essential to life and health
The water utility employee should remember customers are
entitled to _____ and _____. ✓ ✓...... ANSWER .......
courteous treatment and answers to questions about water
In Texas, water operator licensing is administered by the
_____. ✓ ✓...... ANSWER ....... TCEQ
All public water systems are required to employ licensed
operators even if the system only
_____ treated water bought from another source. ✓ ✓......
ANSWER ....... redistributes treated water
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Public water systems include cities, municipal utility
districts, rural water supply
corporations, mobile home parks, and _____. ✓ ✓......
ANSWER ....... campgrounds
Examples of community water systems include ________.
a. municipalities
b. municipal utility districts
c. rural water supply corporations
d. mobile home parks
e. all the above ✓ ✓...... ANSWER ....... e. all of the above
A federal agency impacting the water utility industry is the
_____. ✓ ✓...... ANSWER ....... EPA
The most important federal law impacting the water utility
industry is the _____. ✓ ✓...... ANSWER ....... Safe
Drinking Water Act (PL93-523)
The four national safety and quality standards for drinking
water covered in the Safe
TEXAS CLASS D WATER LICENSE 2026 EXAM
BANK ALL COMPLETE CURRENT TESTING
QUESTIONS AND DETAILED CORRECT
ANSWERS (VERIFIED) GUARANTEED
PASS/TOP-RATED A+.
WATER LICENSE
Maximize your success on the Texas Class D Water License exam
with focused preparation that strengthens your understanding of
basic water treatment, disinfection, safe distribution practices,
and Texas Commission on Environmental Quality (TCEQ)
regulations for small public water systems. It is specifically
designed for water operators in Texas seeking certification to
manage a Class D ground or surface water facility.
Operators have a responsibility to provide drinking water that
meets federal and state
standards. (true/false) ✓ ✓...... ANSWER ....... true
Water must be disinfected, delivered at inadequate
pressure, and be ample in quantity. (true/false) ✓ ✓......
ANSWER ....... false (adequate pressure)
, Page 2 of 91
Utility employees should guard the water supply and
facilities from contamination, public
tours, and even terrorism. (true/false) ✓ ✓...... ANSWER
....... false (public tours)
The state requires bacteriological sample results be kept
_____ years. ✓ ✓...... ANSWER ....... 5 years
The state requires chemical analysis be kept at least _____
years. ✓ ✓...... ANSWER ....... 10 years
EPA requires a water system to keep a copy of each
consumer confidence report at least _____
years. ✓ ✓...... ANSWER ....... 5 years
A public water system provides the public with piped water
for human consumption, serves
at least _____ service connections, and regularly serves at
least _____ individuals daily at least _____
, Page 3 of 91
days out of the year. ✓ ✓...... ANSWER ....... 15 service
connections
25 individuals
60 days out of the year
The water utility field affects everyone because _____. ✓
✓...... ANSWER ....... water is essential to life and health
The water utility employee should remember customers are
entitled to _____ and _____. ✓ ✓...... ANSWER .......
courteous treatment and answers to questions about water
In Texas, water operator licensing is administered by the
_____. ✓ ✓...... ANSWER ....... TCEQ
All public water systems are required to employ licensed
operators even if the system only
_____ treated water bought from another source. ✓ ✓......
ANSWER ....... redistributes treated water
, Page 4 of 91
Public water systems include cities, municipal utility
districts, rural water supply
corporations, mobile home parks, and _____. ✓ ✓......
ANSWER ....... campgrounds
Examples of community water systems include ________.
a. municipalities
b. municipal utility districts
c. rural water supply corporations
d. mobile home parks
e. all the above ✓ ✓...... ANSWER ....... e. all of the above
A federal agency impacting the water utility industry is the
_____. ✓ ✓...... ANSWER ....... EPA
The most important federal law impacting the water utility
industry is the _____. ✓ ✓...... ANSWER ....... Safe
Drinking Water Act (PL93-523)
The four national safety and quality standards for drinking
water covered in the Safe
