2026 D2 WATER DISTRIBUTION TEST
QUESTIONS WITH CORRECT ANSWERS
To create uniform national standards for drinking water quality - CORRECT ANSWER -
What is the primary purpose of the SWDA?
USEPA - CORRECT ANSWER -Who sets Maximum Contaminants Levels (MCLs)?
Sets MCLs, delegates enforcement of SDWA to state agencies, provides grant funds, monitors state activi
ties, provides continued research - CORRECT ANSWER -What are some of the duties of the EPA?
Giving the authority to the state to implement and enforce regulations - CORRECT ANSWER -
What is state primacy?
True. - CORRECT ANSWER -
True or False: State requirements must be at least as stringent as those set by USEPA
15, 25, 60 - CORRECT ANSWER -
A public water system is a system that supplies piped water for human consumption and that has at leas
t ___ service connections or serves ___ or more persons for ___ or more days of the year.
Establishments with their own private water systems that serve an average of 25 persons that do not liv
e at the location, but the same people use the water for more than 6 months per year. Example: school
or factory - CORRECT ANSWER -
What is an nontransient, noncommunity public water system? Give an example of one.
Establishments with own water system and serve at least 25 persons a day but these people only use th
e water occasionally and for short periods of time. Example: Motel or Park - CORRECT ANSWER -
What is a transient, noncommunity public water system? Give an example of one.
Establishments with their own water supply that serve more than 15 homes. Example: HOA, or municip
al water utilities - CORRECT ANSWER -
What is a community public water system? Give an example of one.
, transient, noncommunity - CORRECT ANSWER -
Which of the public water systems are required to only monitor for nitrate, nitrite, and microbiological c
ontamination?
MCLs or a treatment technique requirement for contaminants that may be found in drinking water and
could have an adverse health effect on humans - CORRECT ANSWER -
What does the National Primary Drinking Water Regulations (NPDWRs) specify?
water contaminants that may adversely affect aesthetic qualities of the water such as taste, odor or colo
r - CORRECT ANSWER -
What does the National Secondary Drinking Water Regulations (NPDWRs) specify?
When the water system violates any of the operating, monitoring or reporting requirements or if they e
xceed the MCL - CORRECT ANSWER -When must an agency post a public notification?
Requires that samples be collected at customers taps aſter the water has remained undisturbed in the w
ater piping for at least 6 hrs - CORRECT ANSWER -Lead and Copper Rule (LCR)
true - CORRECT ANSWER -
True or False: system operators are required to regularly collect and test water samples.
false -blending, season, operational changes - CORRECT ANSWER -
True or False: Water quality cannot change aſter it enter the distribution system.
Grab sample, composite sample, time composite sample, flow-proportional composite sample -
CORRECT ANSWER -What are the 4 methods of collecting samples?
A single sample at a single location - CORRECT ANSWER -What is a grab sample?
A series of grab samples atzonezplacezandzatzdifferentztimesz-zCORRECTzANSWERz-
Whatziszazcompositezsample?
Equalzvolumeszatzregularzintervalsz-zCORRECTzANSWERz-Whatziszaztimezcompositezsample?
QUESTIONS WITH CORRECT ANSWERS
To create uniform national standards for drinking water quality - CORRECT ANSWER -
What is the primary purpose of the SWDA?
USEPA - CORRECT ANSWER -Who sets Maximum Contaminants Levels (MCLs)?
Sets MCLs, delegates enforcement of SDWA to state agencies, provides grant funds, monitors state activi
ties, provides continued research - CORRECT ANSWER -What are some of the duties of the EPA?
Giving the authority to the state to implement and enforce regulations - CORRECT ANSWER -
What is state primacy?
True. - CORRECT ANSWER -
True or False: State requirements must be at least as stringent as those set by USEPA
15, 25, 60 - CORRECT ANSWER -
A public water system is a system that supplies piped water for human consumption and that has at leas
t ___ service connections or serves ___ or more persons for ___ or more days of the year.
Establishments with their own private water systems that serve an average of 25 persons that do not liv
e at the location, but the same people use the water for more than 6 months per year. Example: school
or factory - CORRECT ANSWER -
What is an nontransient, noncommunity public water system? Give an example of one.
Establishments with own water system and serve at least 25 persons a day but these people only use th
e water occasionally and for short periods of time. Example: Motel or Park - CORRECT ANSWER -
What is a transient, noncommunity public water system? Give an example of one.
Establishments with their own water supply that serve more than 15 homes. Example: HOA, or municip
al water utilities - CORRECT ANSWER -
What is a community public water system? Give an example of one.
, transient, noncommunity - CORRECT ANSWER -
Which of the public water systems are required to only monitor for nitrate, nitrite, and microbiological c
ontamination?
MCLs or a treatment technique requirement for contaminants that may be found in drinking water and
could have an adverse health effect on humans - CORRECT ANSWER -
What does the National Primary Drinking Water Regulations (NPDWRs) specify?
water contaminants that may adversely affect aesthetic qualities of the water such as taste, odor or colo
r - CORRECT ANSWER -
What does the National Secondary Drinking Water Regulations (NPDWRs) specify?
When the water system violates any of the operating, monitoring or reporting requirements or if they e
xceed the MCL - CORRECT ANSWER -When must an agency post a public notification?
Requires that samples be collected at customers taps aſter the water has remained undisturbed in the w
ater piping for at least 6 hrs - CORRECT ANSWER -Lead and Copper Rule (LCR)
true - CORRECT ANSWER -
True or False: system operators are required to regularly collect and test water samples.
false -blending, season, operational changes - CORRECT ANSWER -
True or False: Water quality cannot change aſter it enter the distribution system.
Grab sample, composite sample, time composite sample, flow-proportional composite sample -
CORRECT ANSWER -What are the 4 methods of collecting samples?
A single sample at a single location - CORRECT ANSWER -What is a grab sample?
A series of grab samples atzonezplacezandzatzdifferentztimesz-zCORRECTzANSWERz-
Whatziszazcompositezsample?
Equalzvolumeszatzregularzintervalsz-zCORRECTzANSWERz-Whatziszaztimezcompositezsample?
