New Jersey Water Treatment Operator T1
Exam Questions and Correct Answers
Page 1 of 125
,Question 1
What is humic acid's role in water analysis?
Correct Answer
An organic precursor that reacts with disinfectants or forms colored compounds.
Question 1: Under the New Jersey Safe Drinking Water Act (NJSDWA) and
the New Jersey Administrative Code (NJAC 7:10), which state agency is
primarily responsible for enforcing drinking water standards and
overseeing public water systems?
A. The United States Environmental Protection Agency (USEPA) Region 2
B. The New Jersey Department of Environmental Protection (NJDEP)
C. The New Jersey Board of Public Utilities (NJBPU)
D. The New Jersey Department of Health (NJDOH)
CORRECT ANSWER: B. The New Jersey Department of Environmental
Protection (NJDEP)
Rationale: While the EPA sets federal baseline standards under the SDWA,
the NJDEP has primacy and is the primary state agency responsible for
enforcing the NJSDWA, issuing permits, and overseeing all public and non-
public water systems in New Jersey.
Question 2: According to NJAC 7:10, what is the specific legal definition of
a "Community Water System" in New Jersey?
A. A system that serves at least 15 service connections used by year-round
residents or regularly serves at least 25 year-round residents.
B. A system that serves at least 25 individuals for at least 60 days out of the
year, such as a school or factory.
C. A system that provides water to a single-family residence with a private
well.
D. A system that only provides water for agricultural irrigation and livestock
watering.
CORRECT ANSWER: A. A system that serves at least 15 service connections
used by year-round residents or regularly serves at least 25 year-round
residents.
Rationale: A Community Water System (CWS) is defined by both federal and
NJ state regulations as a public water system that serves at least 15 service
connections used by year-round residents or regularly serves at least 25
year-round residents.
Question 3: How does a "Non-Transient Non-Community Water System"
(NTNCWS) differ from a "Transient Non-Community Water System"
(TNCWS) under NJDEP regulations?
Page 2 of 125
,A. NTNCWS serves residential homes, while TNCWS serves commercial
businesses.
B. NTNCWS regularly serves at least 25 of the same persons for at least 6
months of the year (e.g., schools), while TNCWS serves a changing
population (e.g., gas stations).
C. NTNCWS uses surface water, while TNCWS exclusively uses groundwater.
D. NTNCWS systems are exempt from coliform sampling, while TNCWS
systems must sample daily.
CORRECT ANSWER: B. NTNCWS regularly serves at least 25 of the same
persons for at least 6 months of the year (e.g., schools), while TNCWS
serves a changing population (e.g., gas stations).
Rationale: NTNCWS systems serve a consistent, captive population (like
schools or factories) for over 6 months, requiring stricter monitoring for
chronic health contaminants, whereas TNCWS systems serve transient
populations (like rest stops or campgrounds).
Question 4: Under the New Jersey Safe Drinking Water Act, what is the
mandatory reporting requirement for a water system if a primary
Maximum Contaminant Level (MCL) violation occurs?
A. The system must notify the NJDEP within 30 days and the public within
one year.
B. The system must notify the NJDEP within 24 hours and the public as soon
as possible, but no later than the timelines specified in the Public
Notification Rule.
C. The system only needs to notify the local health department and does not
need to inform the public.
D. The system must immediately shut down all water production until the
NJDEP grants a variance.
CORRECT ANSWER: B. The system must notify the NJDEP within 24 hours
and the public as soon as possible, but no later than the timelines
specified in the Public Notification Rule.
Rationale: NJAC 7:10 requires immediate notification to the NJDEP (typically
within 24 hours) for acute or primary MCL violations, followed by public
notification according to the tiered timelines (Tier 1 within 24 hours, Tier 2
within 30 days, etc.) established in the Public Notification Rule.
Question 5: What is the primary purpose of the New Jersey Water Quality
Accountability Act (WQAA)?
A. To establish maximum pricing for residential water bills.
B. To require water purveyors to develop asset management plans, submit
routine compliance reports, and ensure financial and technical capacity.
C. To mandate the privatization of all municipal water systems.
Page 3 of 125
, D. To set specific MCLs for emerging contaminants like PFAS.
CORRECT ANSWER: B. To require water purveyors to develop asset
management plans, submit routine compliance reports, and ensure
financial and technical capacity.
Rationale: The WQAA was enacted to ensure water systems have the
technical, managerial, and financial capacity to operate effectively, requiring
them to create asset management plans, certify compliance, and maintain
infrastructure.
Question 6: In New Jersey, what is the Maximum Contaminant Level (MCL)
for Arsenic, which is notably stricter than the federal EPA standard?
A. 0.001 mg/L (1 ppb)
B. 0.005 mg/L (5 ppb)
C. 0.010 mg/L (10 ppb)
D. 0.050 mg/L (50 ppb)
CORRECT ANSWER: B. 0.005 mg/L (5 ppb)
Rationale: While the federal EPA MCL for arsenic is 0.010 mg/L (10 ppb), New
Jersey adopted a stricter MCL of 0.005 mg/L (5 ppb) to provide greater
protection against the carcinogenic and systemic health effects of long-term
arsenic exposure.
Question 7: If a New Jersey public water system exceeds the MCL for
Nitrate (10 mg/L), what is the most immediate and critical public health
concern, particularly for infants?
A. Increased risk of gastrointestinal cancer in the elderly.
B. Development of methemoglobinemia, commonly known as "blue baby
syndrome," which restricts oxygen in the blood.
C. Acute neurological damage and severe seizures in toddlers.
D. Rapid corrosion of lead service lines causing acute lead poisoning.
CORRECT ANSWER: B. Development of methemoglobinemia, commonly
known as "blue baby syndrome," which restricts oxygen in the blood.
Rationale: Nitrate is reduced to nitrite in the infant digestive tract, which
oxidizes hemoglobin to methemoglobin, preventing the blood from carrying
oxygen effectively and causing cyanosis (blue baby syndrome).
Question 8: Under NJDEP regulations, what is the Maximum Contaminant
Level (MCL) for combined Radium-226 and Radium-228 in drinking water?
A. 2 picocuries per liter (pCi/L)
B. 5 picocuries per liter (pCi/L)
C. 10 picocuries per liter (pCi/L)
D. 15 picocuries per liter (pCi/L)
CORRECT ANSWER: B. 5 picocuries per liter (pCi/L)
Page 4 of 125
Exam Questions and Correct Answers
Page 1 of 125
,Question 1
What is humic acid's role in water analysis?
Correct Answer
An organic precursor that reacts with disinfectants or forms colored compounds.
Question 1: Under the New Jersey Safe Drinking Water Act (NJSDWA) and
the New Jersey Administrative Code (NJAC 7:10), which state agency is
primarily responsible for enforcing drinking water standards and
overseeing public water systems?
A. The United States Environmental Protection Agency (USEPA) Region 2
B. The New Jersey Department of Environmental Protection (NJDEP)
C. The New Jersey Board of Public Utilities (NJBPU)
D. The New Jersey Department of Health (NJDOH)
CORRECT ANSWER: B. The New Jersey Department of Environmental
Protection (NJDEP)
Rationale: While the EPA sets federal baseline standards under the SDWA,
the NJDEP has primacy and is the primary state agency responsible for
enforcing the NJSDWA, issuing permits, and overseeing all public and non-
public water systems in New Jersey.
Question 2: According to NJAC 7:10, what is the specific legal definition of
a "Community Water System" in New Jersey?
A. A system that serves at least 15 service connections used by year-round
residents or regularly serves at least 25 year-round residents.
B. A system that serves at least 25 individuals for at least 60 days out of the
year, such as a school or factory.
C. A system that provides water to a single-family residence with a private
well.
D. A system that only provides water for agricultural irrigation and livestock
watering.
CORRECT ANSWER: A. A system that serves at least 15 service connections
used by year-round residents or regularly serves at least 25 year-round
residents.
Rationale: A Community Water System (CWS) is defined by both federal and
NJ state regulations as a public water system that serves at least 15 service
connections used by year-round residents or regularly serves at least 25
year-round residents.
Question 3: How does a "Non-Transient Non-Community Water System"
(NTNCWS) differ from a "Transient Non-Community Water System"
(TNCWS) under NJDEP regulations?
Page 2 of 125
,A. NTNCWS serves residential homes, while TNCWS serves commercial
businesses.
B. NTNCWS regularly serves at least 25 of the same persons for at least 6
months of the year (e.g., schools), while TNCWS serves a changing
population (e.g., gas stations).
C. NTNCWS uses surface water, while TNCWS exclusively uses groundwater.
D. NTNCWS systems are exempt from coliform sampling, while TNCWS
systems must sample daily.
CORRECT ANSWER: B. NTNCWS regularly serves at least 25 of the same
persons for at least 6 months of the year (e.g., schools), while TNCWS
serves a changing population (e.g., gas stations).
Rationale: NTNCWS systems serve a consistent, captive population (like
schools or factories) for over 6 months, requiring stricter monitoring for
chronic health contaminants, whereas TNCWS systems serve transient
populations (like rest stops or campgrounds).
Question 4: Under the New Jersey Safe Drinking Water Act, what is the
mandatory reporting requirement for a water system if a primary
Maximum Contaminant Level (MCL) violation occurs?
A. The system must notify the NJDEP within 30 days and the public within
one year.
B. The system must notify the NJDEP within 24 hours and the public as soon
as possible, but no later than the timelines specified in the Public
Notification Rule.
C. The system only needs to notify the local health department and does not
need to inform the public.
D. The system must immediately shut down all water production until the
NJDEP grants a variance.
CORRECT ANSWER: B. The system must notify the NJDEP within 24 hours
and the public as soon as possible, but no later than the timelines
specified in the Public Notification Rule.
Rationale: NJAC 7:10 requires immediate notification to the NJDEP (typically
within 24 hours) for acute or primary MCL violations, followed by public
notification according to the tiered timelines (Tier 1 within 24 hours, Tier 2
within 30 days, etc.) established in the Public Notification Rule.
Question 5: What is the primary purpose of the New Jersey Water Quality
Accountability Act (WQAA)?
A. To establish maximum pricing for residential water bills.
B. To require water purveyors to develop asset management plans, submit
routine compliance reports, and ensure financial and technical capacity.
C. To mandate the privatization of all municipal water systems.
Page 3 of 125
, D. To set specific MCLs for emerging contaminants like PFAS.
CORRECT ANSWER: B. To require water purveyors to develop asset
management plans, submit routine compliance reports, and ensure
financial and technical capacity.
Rationale: The WQAA was enacted to ensure water systems have the
technical, managerial, and financial capacity to operate effectively, requiring
them to create asset management plans, certify compliance, and maintain
infrastructure.
Question 6: In New Jersey, what is the Maximum Contaminant Level (MCL)
for Arsenic, which is notably stricter than the federal EPA standard?
A. 0.001 mg/L (1 ppb)
B. 0.005 mg/L (5 ppb)
C. 0.010 mg/L (10 ppb)
D. 0.050 mg/L (50 ppb)
CORRECT ANSWER: B. 0.005 mg/L (5 ppb)
Rationale: While the federal EPA MCL for arsenic is 0.010 mg/L (10 ppb), New
Jersey adopted a stricter MCL of 0.005 mg/L (5 ppb) to provide greater
protection against the carcinogenic and systemic health effects of long-term
arsenic exposure.
Question 7: If a New Jersey public water system exceeds the MCL for
Nitrate (10 mg/L), what is the most immediate and critical public health
concern, particularly for infants?
A. Increased risk of gastrointestinal cancer in the elderly.
B. Development of methemoglobinemia, commonly known as "blue baby
syndrome," which restricts oxygen in the blood.
C. Acute neurological damage and severe seizures in toddlers.
D. Rapid corrosion of lead service lines causing acute lead poisoning.
CORRECT ANSWER: B. Development of methemoglobinemia, commonly
known as "blue baby syndrome," which restricts oxygen in the blood.
Rationale: Nitrate is reduced to nitrite in the infant digestive tract, which
oxidizes hemoglobin to methemoglobin, preventing the blood from carrying
oxygen effectively and causing cyanosis (blue baby syndrome).
Question 8: Under NJDEP regulations, what is the Maximum Contaminant
Level (MCL) for combined Radium-226 and Radium-228 in drinking water?
A. 2 picocuries per liter (pCi/L)
B. 5 picocuries per liter (pCi/L)
C. 10 picocuries per liter (pCi/L)
D. 15 picocuries per liter (pCi/L)
CORRECT ANSWER: B. 5 picocuries per liter (pCi/L)
Page 4 of 125
