NEW JERSEY WATER TREATMENT OPERATOR T1 EXAM
Complete Practice Exam Questions AND WELL VERIFIED
ANSWERS (2026 Edition) ACTUAL!!!
SECTION 1: REGULATIONS AND STANDARDS
Question 1
According to NJAC 7:10, which federal act forms the basis for New Jersey's Safe Drinking Water
regulations?
A) Clean Water Act
B) Safe Drinking Water Act (SDWA)
C) Resource Conservation and Recovery Act
D) National Environmental Policy Act
Correct ANSWER✔✨-: B
Rationale:
Option A is incorrect because the Clean Water Act primarily addresses surface water quality and
wastewater discharges, not drinking water standards.
Option B is correct because the Safe Drinking Water Act (SDWA) is the federal law that protects public
drinking water supplies and forms the basis for NJAC 7:10, which establishes New Jersey's state-specific
drinking water standards.
www.epa.gov
Option C is incorrect because RCRA deals with hazardous waste management, not drinking water
regulations.
Option D is incorrect because NEPA addresses environmental impact assessments for federal actions,
not drinking water standards.
Question 2
What is the primary purpose of NJAC 7:10 regulations?
,A) To regulate wastewater treatment facilities only
B) To establish enforceable standards for public drinking water systems
C) To provide guidelines for private well owners
D) To regulate industrial water use
Correct ANSWER✔✨-: B
Rationale:
Option A is incorrect because NJAC 7:10 specifically addresses drinking water, not wastewater
treatment.
Option B is correct because NJAC 7:10 establishes both primary (health-based) and secondary (aesthetic)
drinking water standards that are legally enforceable for public water systems in New Jersey.
open-exam-prep.com
Option C is incorrect because private wells are generally not regulated under NJAC 7:10, which applies
to public water systems.
Option D is incorrect because industrial water use regulations fall under different NJAC chapters, not
7:10.
Question 3
Which agency is responsible for enforcing drinking water regulations in New Jersey?
A) U.S. Environmental Protection Agency (EPA)
B) New Jersey Department of Health (NJDOH)
C) New Jersey Department of Environmental Protection (NJDEP)
D) New Jersey Board of Public Utilities
Correct ANSWER✔✨-: C
Rationale:
Option A is incorrect because while EPA sets federal standards, New Jersey has primacy and enforces its
own drinking water program through NJDEP.
Option B is incorrect because the Department of Health focuses on public health programs, not water
system regulation enforcement.
Option C is correct because NJDEP's Division of Water Supply and Geoscience (part of the Water
Resource Management) is responsible for implementing and enforcing drinking water regulations in
New Jersey.
dep.nj.gov
,Option D is incorrect because the Board of Public Utilities regulates utility rates and services, not water
quality standards.
Question 4
As of 2026, what is the maximum contaminant level (MCL) for lead in drinking water?
A) 0 mg/L (zero tolerance)
B) 0.005 mg/L
C) 0.015 mg/L (action level)
D) 0.050 mg/L
Correct ANSWER✔✨-: C
Rationale:
Option A is incorrect because while the goal is zero lead, there is a specific action level rather than zero
tolerance.
Option B is incorrect because this is not the established action level for lead.
Option C is correct because the lead action level is 0.015 mg/L (15 ppb). This is not an MCL but an action
level that triggers additional requirements when exceeded.
dep.nj.gov
Option D is incorrect because 0.050 mg/L exceeds the current action level for lead.
Question 5
What is the enforcement mechanism when a water system exceeds the lead action level?
A) Immediate shutdown of the water system
B) Implementation of corrosion control treatment and public notification
C) Automatic fines without investigation
D) No action required unless health effects are reported
Correct ANSWER✔✨-: B
Rationale:
Option A is incorrect because exceeding the action level does not require immediate shutdown; instead,
specific corrective actions are required.
Option B is correct because when the lead action level is exceeded, water systems must implement or
optimize corrosion control treatment, conduct public education, and may need to replace lead service
lines.
dep.nj.gov
, Option C is incorrect because enforcement follows a progressive approach with technical assistance
before penalties.
Option D is incorrect because action is required when the action level is exceeded, regardless of
reported health effects.
Question 6
Which of the following best describes a "public water system" under NJ regulations?
A) Any water system serving more than 10 people
B) A system providing water for human consumption through pipes to at least 15 service connections or
regularly serving 25 individuals
C) Only municipally-owned water systems
D) Any system that sells water to the public
Correct ANSWER✔✨-: B
Rationale:
Option A is incorrect because the threshold is higher than 10 people.
Option B is correct because a public water system is defined as providing water for human consumption
through pipes or other constructed conveyances to at least 15 service connections or regularly serving
an average of at least 25 individuals daily at least 60 days out of the year.
Option C is incorrect because public water systems can be privately or publicly owned.
Option D is incorrect because the definition is based on the number of connections or people served,
not whether water is sold.
Question 7
What are "primary standards" in drinking water regulations?
A) Standards based on aesthetic considerations like taste and odor
B) Health-based standards that are legally enforceable
C) Voluntary guidelines for water quality
D) Standards that apply only to new water systems
Correct ANSWER✔✨-: B
Rationale:
Option A is incorrect because aesthetic considerations are covered by secondary standards, not primary
standards.
Complete Practice Exam Questions AND WELL VERIFIED
ANSWERS (2026 Edition) ACTUAL!!!
SECTION 1: REGULATIONS AND STANDARDS
Question 1
According to NJAC 7:10, which federal act forms the basis for New Jersey's Safe Drinking Water
regulations?
A) Clean Water Act
B) Safe Drinking Water Act (SDWA)
C) Resource Conservation and Recovery Act
D) National Environmental Policy Act
Correct ANSWER✔✨-: B
Rationale:
Option A is incorrect because the Clean Water Act primarily addresses surface water quality and
wastewater discharges, not drinking water standards.
Option B is correct because the Safe Drinking Water Act (SDWA) is the federal law that protects public
drinking water supplies and forms the basis for NJAC 7:10, which establishes New Jersey's state-specific
drinking water standards.
www.epa.gov
Option C is incorrect because RCRA deals with hazardous waste management, not drinking water
regulations.
Option D is incorrect because NEPA addresses environmental impact assessments for federal actions,
not drinking water standards.
Question 2
What is the primary purpose of NJAC 7:10 regulations?
,A) To regulate wastewater treatment facilities only
B) To establish enforceable standards for public drinking water systems
C) To provide guidelines for private well owners
D) To regulate industrial water use
Correct ANSWER✔✨-: B
Rationale:
Option A is incorrect because NJAC 7:10 specifically addresses drinking water, not wastewater
treatment.
Option B is correct because NJAC 7:10 establishes both primary (health-based) and secondary (aesthetic)
drinking water standards that are legally enforceable for public water systems in New Jersey.
open-exam-prep.com
Option C is incorrect because private wells are generally not regulated under NJAC 7:10, which applies
to public water systems.
Option D is incorrect because industrial water use regulations fall under different NJAC chapters, not
7:10.
Question 3
Which agency is responsible for enforcing drinking water regulations in New Jersey?
A) U.S. Environmental Protection Agency (EPA)
B) New Jersey Department of Health (NJDOH)
C) New Jersey Department of Environmental Protection (NJDEP)
D) New Jersey Board of Public Utilities
Correct ANSWER✔✨-: C
Rationale:
Option A is incorrect because while EPA sets federal standards, New Jersey has primacy and enforces its
own drinking water program through NJDEP.
Option B is incorrect because the Department of Health focuses on public health programs, not water
system regulation enforcement.
Option C is correct because NJDEP's Division of Water Supply and Geoscience (part of the Water
Resource Management) is responsible for implementing and enforcing drinking water regulations in
New Jersey.
dep.nj.gov
,Option D is incorrect because the Board of Public Utilities regulates utility rates and services, not water
quality standards.
Question 4
As of 2026, what is the maximum contaminant level (MCL) for lead in drinking water?
A) 0 mg/L (zero tolerance)
B) 0.005 mg/L
C) 0.015 mg/L (action level)
D) 0.050 mg/L
Correct ANSWER✔✨-: C
Rationale:
Option A is incorrect because while the goal is zero lead, there is a specific action level rather than zero
tolerance.
Option B is incorrect because this is not the established action level for lead.
Option C is correct because the lead action level is 0.015 mg/L (15 ppb). This is not an MCL but an action
level that triggers additional requirements when exceeded.
dep.nj.gov
Option D is incorrect because 0.050 mg/L exceeds the current action level for lead.
Question 5
What is the enforcement mechanism when a water system exceeds the lead action level?
A) Immediate shutdown of the water system
B) Implementation of corrosion control treatment and public notification
C) Automatic fines without investigation
D) No action required unless health effects are reported
Correct ANSWER✔✨-: B
Rationale:
Option A is incorrect because exceeding the action level does not require immediate shutdown; instead,
specific corrective actions are required.
Option B is correct because when the lead action level is exceeded, water systems must implement or
optimize corrosion control treatment, conduct public education, and may need to replace lead service
lines.
dep.nj.gov
, Option C is incorrect because enforcement follows a progressive approach with technical assistance
before penalties.
Option D is incorrect because action is required when the action level is exceeded, regardless of
reported health effects.
Question 6
Which of the following best describes a "public water system" under NJ regulations?
A) Any water system serving more than 10 people
B) A system providing water for human consumption through pipes to at least 15 service connections or
regularly serving 25 individuals
C) Only municipally-owned water systems
D) Any system that sells water to the public
Correct ANSWER✔✨-: B
Rationale:
Option A is incorrect because the threshold is higher than 10 people.
Option B is correct because a public water system is defined as providing water for human consumption
through pipes or other constructed conveyances to at least 15 service connections or regularly serving
an average of at least 25 individuals daily at least 60 days out of the year.
Option C is incorrect because public water systems can be privately or publicly owned.
Option D is incorrect because the definition is based on the number of connections or people served,
not whether water is sold.
Question 7
What are "primary standards" in drinking water regulations?
A) Standards based on aesthetic considerations like taste and odor
B) Health-based standards that are legally enforceable
C) Voluntary guidelines for water quality
D) Standards that apply only to new water systems
Correct ANSWER✔✨-: B
Rationale:
Option A is incorrect because aesthetic considerations are covered by secondary standards, not primary
standards.
