TEXAS WATER WELL DRILLER & PUMP
INSTALLER LICENSE EXAM PRE 250 VERIFIED
QUESTIONS AND ANSWERS + DETAILED
RATIONALES (TDLR 16 TAC CHAPTER 76
STANDARDS)
Master the Texas Water Well Driller and Pump Installer
Licensing Exams with this comprehensive, verified question
practice test featuring explicit answer keys and highly
detailed rationales. Strategically engineered to mirror the
updated 2025/2026 TDLR and 16 TAC Chapter 76
administrative codes, it provides structural mastery over
core domains including hydrogeology, well completion
metrics, and sanitary setbacks. This premium resource is
optimized to ensure absolute recall and top-tier scores for
prospective professional operators on your preferred study
boards.
Question 1
Under Texas Department of Licensing and Regulation (TDLR)
rules, what is the mandatory minimum distance that a new water
well must be spaced from an existing septic tank?
• A) 50 feet
, • B) 75 feet
• C) 100 feet
• D) 150 feet
Correct Answer: C) 100 feet
Rationale: Under 16 TAC §76.1000, all new water wells must
be located a minimum horizontal distance of 100 feet from
any existing or proposed septic tanks to mitigate the high
risk of microbial and chemical pathogens leaching into the
potable water supply.
Question 2
What is the minimum required horizontal distance between a
newly drilled water well and a septic tank drainfield (absorption
field)?
• A) 50 feet
• B) 100 feet
• C) 150 feet
• D) 200 feet
Correct Answer: C) 150 feet
Rationale: TDLR rules enforce a stricter 150-foot minimum
isolation clearance from septic drainfields, spray areas, or
unlined wastewater ponds because effluent actively
discharges into these zones, increasing the probability of
subsurface plume migration.
Question 3
,Within how many calendar days must a licensed Texas water well
driller submit the official State Well Report to the TDLR after
completing well construction or plugging operations?
• A) 30 days
• B) 45 days
• C) 60 days
• D) 90 days
Correct Answer: C) 60 days
Rationale: 16 TAC §76.700 dictates that a complete and
legible State Well Report must be filed digitally or via hard
copy with the agency and provided to the landowner within
60 days of completion. Failure to submit within this window
is a primary source of administrative penalties.
Question 4
A licensed driller or pump installer must complete how many
hours of TDLR-approved continuing education (CE) during each
annual licensing period to qualify for renewal?
• A) 2 hours
• B) 4 hours
• C) 8 hours
• D) 12 hours
Correct Answer: B) 4 hours
Rationale: Per TDLR occupational rules, licensees must
complete 4 hours of approved continuing education every
year. This must include at least 1 hour covering Texas water
, well statutes/rules and another hour dedicated to water well
safety and environmental protection.
Question 5
Which of the following entities has the primary statutory authority
in Texas to enforce local rules regarding well spacing, permitting,
and maximum daily groundwater production limits?
• A) Texas Commission on Environmental Quality (TCEQ)
• B) Texas Water Development Board (TWDB)
• C) Groundwater Conservation Districts (GCDs)
• D) Railroad Commission of Texas (RRC)
Correct Answer: C) Groundwater Conservation Districts (GCDs)
Rationale: While TDLR regulates the driller's license and
statewide minimum construction standards, Texas law grants
local Groundwater Conservation Districts (GCDs) the
authority to enforce stricter site-specific regulations, local
spacing matrices, and production limits.
Question 6
According to Texas regulations, what is the minimum height that
the top of a well casing must extend above the final established
ground surface or surrounding concrete pad?
• A) 6 inches
• B) 12 inches
• C) 18 inches
• D) 24 inches
INSTALLER LICENSE EXAM PRE 250 VERIFIED
QUESTIONS AND ANSWERS + DETAILED
RATIONALES (TDLR 16 TAC CHAPTER 76
STANDARDS)
Master the Texas Water Well Driller and Pump Installer
Licensing Exams with this comprehensive, verified question
practice test featuring explicit answer keys and highly
detailed rationales. Strategically engineered to mirror the
updated 2025/2026 TDLR and 16 TAC Chapter 76
administrative codes, it provides structural mastery over
core domains including hydrogeology, well completion
metrics, and sanitary setbacks. This premium resource is
optimized to ensure absolute recall and top-tier scores for
prospective professional operators on your preferred study
boards.
Question 1
Under Texas Department of Licensing and Regulation (TDLR)
rules, what is the mandatory minimum distance that a new water
well must be spaced from an existing septic tank?
• A) 50 feet
, • B) 75 feet
• C) 100 feet
• D) 150 feet
Correct Answer: C) 100 feet
Rationale: Under 16 TAC §76.1000, all new water wells must
be located a minimum horizontal distance of 100 feet from
any existing or proposed septic tanks to mitigate the high
risk of microbial and chemical pathogens leaching into the
potable water supply.
Question 2
What is the minimum required horizontal distance between a
newly drilled water well and a septic tank drainfield (absorption
field)?
• A) 50 feet
• B) 100 feet
• C) 150 feet
• D) 200 feet
Correct Answer: C) 150 feet
Rationale: TDLR rules enforce a stricter 150-foot minimum
isolation clearance from septic drainfields, spray areas, or
unlined wastewater ponds because effluent actively
discharges into these zones, increasing the probability of
subsurface plume migration.
Question 3
,Within how many calendar days must a licensed Texas water well
driller submit the official State Well Report to the TDLR after
completing well construction or plugging operations?
• A) 30 days
• B) 45 days
• C) 60 days
• D) 90 days
Correct Answer: C) 60 days
Rationale: 16 TAC §76.700 dictates that a complete and
legible State Well Report must be filed digitally or via hard
copy with the agency and provided to the landowner within
60 days of completion. Failure to submit within this window
is a primary source of administrative penalties.
Question 4
A licensed driller or pump installer must complete how many
hours of TDLR-approved continuing education (CE) during each
annual licensing period to qualify for renewal?
• A) 2 hours
• B) 4 hours
• C) 8 hours
• D) 12 hours
Correct Answer: B) 4 hours
Rationale: Per TDLR occupational rules, licensees must
complete 4 hours of approved continuing education every
year. This must include at least 1 hour covering Texas water
, well statutes/rules and another hour dedicated to water well
safety and environmental protection.
Question 5
Which of the following entities has the primary statutory authority
in Texas to enforce local rules regarding well spacing, permitting,
and maximum daily groundwater production limits?
• A) Texas Commission on Environmental Quality (TCEQ)
• B) Texas Water Development Board (TWDB)
• C) Groundwater Conservation Districts (GCDs)
• D) Railroad Commission of Texas (RRC)
Correct Answer: C) Groundwater Conservation Districts (GCDs)
Rationale: While TDLR regulates the driller's license and
statewide minimum construction standards, Texas law grants
local Groundwater Conservation Districts (GCDs) the
authority to enforce stricter site-specific regulations, local
spacing matrices, and production limits.
Question 6
According to Texas regulations, what is the minimum height that
the top of a well casing must extend above the final established
ground surface or surrounding concrete pad?
• A) 6 inches
• B) 12 inches
• C) 18 inches
• D) 24 inches
