1|Page
CSWO Exam 2025 / Certified Storm Water Operator
Exam Prep with 100 Questions and Correct Answers
from the CSWO and SESC Comprehensive Training
Manual
T/F: In Texas, about 75% of all water is used for
commercial, industrial, or agricultural purposes. -
...ANSWER...✓✓ True
Water covers approximately ________ of Earth's surface. -
...ANSWER...✓✓ 71%
Drought is an extended period when a region receives a
deficiency in its ________ water supply. - ...ANSWER...✓✓
atmospheric, ground, or surface
T/F: Only about 1 gallon of tap water per person/day is
used for drinking and cooking - ...ANSWER...✓✓ True
Excluding outside water use, the average household uses
about _______ gallons of water per month for inside use -
...ANSWER...✓✓ 2,000
,2|Page
T/F: Only 3% of all the fresh water on earth can be easily
accessed for use. - ...ANSWER...✓✓ False (only 1%)
T/F: In 1978, the Texas Department of Health (TDH)
assumed primacy over the Safe Drinking Water Act from
the EPA. - ...ANSWER...✓✓ True
T/F: PWS officials should be pro-active in their approach
to terrorism. - ...ANSWER...✓✓ True
_________ permits the owner of a well to pump as much
water as desired, even if the water is drained from
beneath the land of others. - ...ANSWER...✓✓ Rule of
Capture
In Texas, agricultural water demand accounts for about
___% of the total water used. - ...ANSWER...✓✓ 57%
T/F: An example of a non-transient non-community PWS
is a rural school. - ...ANSWER...✓✓ True
,3|Page
Monitoring average and maximum daily water ______
enables us to plan ahead for growth. - ...ANSWER...✓✓
Demand
T/F: The Safe Drinking Water Act sets standards for
drinking water including physical, chemical,
bacteriological, and radiological characteristics. -
...ANSWER...✓✓ True
"Potable" means water is safe to drink and has a
measurable chlorine ________. - ...ANSWER...✓✓ Residual
The plant operator is responsible for a sufficient supply of
safe and ________ drinking water. - ...ANSWER...✓✓
Palatable
T/F: The Texas State Board of Fire Insurance requires
utilities that provide fire protection to have a minimum
amount of water available based on 30 gals per person
per day. - ...ANSWER...✓✓ False (130 gals per person per
day)
, 4|Page
T/F: The primary state regulator of water utilities is the
TCEQ. - ...ANSWER...✓✓ True
T/F: All community and non-transient non-community
PWS, regardless of source of water, must be under the
supervision of a licensed water works operator. -
...ANSWER...✓✓ True
Meter readers bring in operating revenue and profoundly
impact _____ relations. - ...ANSWER...✓✓ Public
The federal regulator of drinking water is the _____. -
...ANSWER...✓✓ EPA
T/F: Duties of distribution operator include repairing
leaks, making taps, flushing mains, and taking
radiological samples. - ...ANSWER...✓✓ False (Repair
leaks, Make taps, Flush mains, Operate pumps, Take
*bacteriological* samples)
A service area has 1000 service connections. What can
we estimate the population of this service area to be? -
...ANSWER...✓✓ 3,000 (multiply connections x 3)
CSWO Exam 2025 / Certified Storm Water Operator
Exam Prep with 100 Questions and Correct Answers
from the CSWO and SESC Comprehensive Training
Manual
T/F: In Texas, about 75% of all water is used for
commercial, industrial, or agricultural purposes. -
...ANSWER...✓✓ True
Water covers approximately ________ of Earth's surface. -
...ANSWER...✓✓ 71%
Drought is an extended period when a region receives a
deficiency in its ________ water supply. - ...ANSWER...✓✓
atmospheric, ground, or surface
T/F: Only about 1 gallon of tap water per person/day is
used for drinking and cooking - ...ANSWER...✓✓ True
Excluding outside water use, the average household uses
about _______ gallons of water per month for inside use -
...ANSWER...✓✓ 2,000
,2|Page
T/F: Only 3% of all the fresh water on earth can be easily
accessed for use. - ...ANSWER...✓✓ False (only 1%)
T/F: In 1978, the Texas Department of Health (TDH)
assumed primacy over the Safe Drinking Water Act from
the EPA. - ...ANSWER...✓✓ True
T/F: PWS officials should be pro-active in their approach
to terrorism. - ...ANSWER...✓✓ True
_________ permits the owner of a well to pump as much
water as desired, even if the water is drained from
beneath the land of others. - ...ANSWER...✓✓ Rule of
Capture
In Texas, agricultural water demand accounts for about
___% of the total water used. - ...ANSWER...✓✓ 57%
T/F: An example of a non-transient non-community PWS
is a rural school. - ...ANSWER...✓✓ True
,3|Page
Monitoring average and maximum daily water ______
enables us to plan ahead for growth. - ...ANSWER...✓✓
Demand
T/F: The Safe Drinking Water Act sets standards for
drinking water including physical, chemical,
bacteriological, and radiological characteristics. -
...ANSWER...✓✓ True
"Potable" means water is safe to drink and has a
measurable chlorine ________. - ...ANSWER...✓✓ Residual
The plant operator is responsible for a sufficient supply of
safe and ________ drinking water. - ...ANSWER...✓✓
Palatable
T/F: The Texas State Board of Fire Insurance requires
utilities that provide fire protection to have a minimum
amount of water available based on 30 gals per person
per day. - ...ANSWER...✓✓ False (130 gals per person per
day)
, 4|Page
T/F: The primary state regulator of water utilities is the
TCEQ. - ...ANSWER...✓✓ True
T/F: All community and non-transient non-community
PWS, regardless of source of water, must be under the
supervision of a licensed water works operator. -
...ANSWER...✓✓ True
Meter readers bring in operating revenue and profoundly
impact _____ relations. - ...ANSWER...✓✓ Public
The federal regulator of drinking water is the _____. -
...ANSWER...✓✓ EPA
T/F: Duties of distribution operator include repairing
leaks, making taps, flushing mains, and taking
radiological samples. - ...ANSWER...✓✓ False (Repair
leaks, Make taps, Flush mains, Operate pumps, Take
*bacteriological* samples)
A service area has 1000 service connections. What can
we estimate the population of this service area to be? -
...ANSWER...✓✓ 3,000 (multiply connections x 3)
