AWWA ABC Water Distribution Grades 1
& 2 / Newest 2025 Actual Exam 120+
Questions and Correct Detailed
Answers (Verified Answers)
_____________Quiz____________?
Which agency sets legal limits on the concentration levels of harmful contaminants in potable
water distributed to customers? -
Answer✓✓
US Environmental Protection Agency
_____________Quiz____________?
The number of monthly distributions system bacteriologiacal samples required is -
Answer✓✓
Based on the population served
_____________Quiz____________?
What is the maximum contaminant level for total trihalomethanes (TTHM) in the united States?
-
Answer✓✓
0.080 mg/L
1
,_____________Quiz____________?
Under the Surface Water Treatment Rule, disinfection residuals must be collected at the same
location in the distribution system as -
Answer✓✓
coliform samples
_____________Quiz____________?
Iron can cause "red water" and thus customer complaints when its concentration is above its
secondary maximum contaminant level of -
Answer✓✓
0.30 mg/L
_____________Quiz____________?
The goal of the Surface Drinking Water Act is for each ________ to accept primary
enforcement responsibility (primacy) for the operation of the state's drinking water program. -
Answer✓✓
State
_____________Quiz____________?
What is the objective of Total Coliform Rule? -
Answer✓✓
To promote routine surveillance of distribution system water quality to search for fecal matter
and/or disease-causing bacteria
2
,_____________Quiz____________?
Which agency sets standards on the concentration levels of harmful contaminants in drinking
water? -
Answer✓✓
EPA
_____________Quiz____________?
Explain the difference between the different tiers of violations. Which tier is the most serious? -
Answer✓✓
Tier 1 = 24 hours (most severe)
Tier 2= 30 days
Tier 3= 1 year
_____________Quiz____________?
A positive E. Coli test must be reported to the primacy health agency within what time period?
-
Answer✓✓
24 hours
_____________Quiz____________?
How is the required number of monthly bacteriological samples determined? -
Answer✓✓
3
, Population served
_____________Quiz____________?
What is the action level for lead in first-draw samples taken from customer taps? -
Answer✓✓
0.015 mg/L
_____________Quiz____________?
A water system is designated a community public water system if it serves how many homes? -
Answer✓✓
15 or more
_____________Quiz____________?
What authority provides specific water sampling instructions? -
Answer✓✓
The state primacy agency
_____________Quiz____________?
According to the Lead and Copper Rule, what is the action level for lead? -
Answer✓✓
0.015 mg/L
_____________Quiz____________?
4
& 2 / Newest 2025 Actual Exam 120+
Questions and Correct Detailed
Answers (Verified Answers)
_____________Quiz____________?
Which agency sets legal limits on the concentration levels of harmful contaminants in potable
water distributed to customers? -
Answer✓✓
US Environmental Protection Agency
_____________Quiz____________?
The number of monthly distributions system bacteriologiacal samples required is -
Answer✓✓
Based on the population served
_____________Quiz____________?
What is the maximum contaminant level for total trihalomethanes (TTHM) in the united States?
-
Answer✓✓
0.080 mg/L
1
,_____________Quiz____________?
Under the Surface Water Treatment Rule, disinfection residuals must be collected at the same
location in the distribution system as -
Answer✓✓
coliform samples
_____________Quiz____________?
Iron can cause "red water" and thus customer complaints when its concentration is above its
secondary maximum contaminant level of -
Answer✓✓
0.30 mg/L
_____________Quiz____________?
The goal of the Surface Drinking Water Act is for each ________ to accept primary
enforcement responsibility (primacy) for the operation of the state's drinking water program. -
Answer✓✓
State
_____________Quiz____________?
What is the objective of Total Coliform Rule? -
Answer✓✓
To promote routine surveillance of distribution system water quality to search for fecal matter
and/or disease-causing bacteria
2
,_____________Quiz____________?
Which agency sets standards on the concentration levels of harmful contaminants in drinking
water? -
Answer✓✓
EPA
_____________Quiz____________?
Explain the difference between the different tiers of violations. Which tier is the most serious? -
Answer✓✓
Tier 1 = 24 hours (most severe)
Tier 2= 30 days
Tier 3= 1 year
_____________Quiz____________?
A positive E. Coli test must be reported to the primacy health agency within what time period?
-
Answer✓✓
24 hours
_____________Quiz____________?
How is the required number of monthly bacteriological samples determined? -
Answer✓✓
3
, Population served
_____________Quiz____________?
What is the action level for lead in first-draw samples taken from customer taps? -
Answer✓✓
0.015 mg/L
_____________Quiz____________?
A water system is designated a community public water system if it serves how many homes? -
Answer✓✓
15 or more
_____________Quiz____________?
What authority provides specific water sampling instructions? -
Answer✓✓
The state primacy agency
_____________Quiz____________?
According to the Lead and Copper Rule, what is the action level for lead? -
Answer✓✓
0.015 mg/L
_____________Quiz____________?
4
