MUNICIPAL SEPARATE STORM SEWER SYSTEM
(MS4) COMPLIANCE EXAM QUESTIONS AND
CORRECT ANSWERS (VERIFIED ANSWERS) Q&A
2027 |INSTANT DOWNLOAD PDF
1. What does MS4 stand for?
A. Municipal Stormwater Treatment Facility
B. Municipal Separate Storm Sewer System
C. Municipal Surface Sewer Treatment
D. Managed Stormwater Sewer System
Correct Answer: B. Municipal Separate Storm Sewer System
Rationale: An MS4 is a conveyance or system of conveyances
designed to collect or convey stormwater and that is owned or
operated by a public entity.
2. Which federal program primarily regulates discharges from
regulated MS4s?
A. RCRA
B. CERCLA
C. NPDES
D. FIFRA
Correct Answer: C. NPDES
Rationale: The National Pollutant Discharge Elimination System
(NPDES) regulates stormwater discharges from regulated MS4s
under the Clean Water Act.
,3. What is the primary environmental objective of an MS4
stormwater program?
A. Increase wastewater production
B. Reduce pollutants discharged through the storm sewer
system
C. Eliminate all rainfall runoff
D. Increase groundwater pumping
Correct Answer: B. Reduce pollutants discharged through the
storm sewer system
Rationale: MS4 programs are designed to reduce pollutant
discharges and protect water quality.
4. Which of the following is one of the six minimum control
measures for a regulated small MS4?
A. Drinking water treatment
B. Public education and outreach
C. Sewage sludge incineration
D. Air emissions monitoring
Correct Answer: B. Public education and outreach
Rationale: Public education and outreach is one of the six
required minimum control measures.
,5. How many minimum control measures are required under
the Phase II small MS4 program?
A. Four
B. Five
C. Six
D. Eight
Correct Answer: C. Six
Rationale: The Phase II program identifies six minimum control
measures.
6. Which activity is part of the illicit discharge detection and
elimination program?
A. Detecting unauthorized non-stormwater discharges
B. Increasing wastewater treatment capacity
C. Testing drinking water
D. Managing solid waste landfills
Correct Answer: A. Detecting unauthorized non-stormwater
discharges
Rationale: IDDE programs identify and eliminate inappropriate
discharges entering the MS4.
7. What is a stormwater outfall?
A. A location where an MS4 discharges to a receiving water or
other designated location
, B. A wastewater treatment laboratory
C. A groundwater monitoring well
D. A municipal water-storage tank
Correct Answer: A. A location where an MS4 discharges to a
receiving water or other designated location
Rationale: Outfalls are important points for mapping,
inspection, and evaluating MS4 discharges.
8. Which document generally describes how a regulated MS4
will implement its stormwater program?
A. SWMP
B. SDS
C. RCRA
D. SPCC
Correct Answer: A. SWMP
Rationale: A Stormwater Management Program (SWMP)
describes the BMPs, measurable goals, and activities used to
satisfy permit requirements.
9. What does BMP commonly mean in stormwater
management?
A. Basic Monitoring Procedure
B. Best Management Practice
(MS4) COMPLIANCE EXAM QUESTIONS AND
CORRECT ANSWERS (VERIFIED ANSWERS) Q&A
2027 |INSTANT DOWNLOAD PDF
1. What does MS4 stand for?
A. Municipal Stormwater Treatment Facility
B. Municipal Separate Storm Sewer System
C. Municipal Surface Sewer Treatment
D. Managed Stormwater Sewer System
Correct Answer: B. Municipal Separate Storm Sewer System
Rationale: An MS4 is a conveyance or system of conveyances
designed to collect or convey stormwater and that is owned or
operated by a public entity.
2. Which federal program primarily regulates discharges from
regulated MS4s?
A. RCRA
B. CERCLA
C. NPDES
D. FIFRA
Correct Answer: C. NPDES
Rationale: The National Pollutant Discharge Elimination System
(NPDES) regulates stormwater discharges from regulated MS4s
under the Clean Water Act.
,3. What is the primary environmental objective of an MS4
stormwater program?
A. Increase wastewater production
B. Reduce pollutants discharged through the storm sewer
system
C. Eliminate all rainfall runoff
D. Increase groundwater pumping
Correct Answer: B. Reduce pollutants discharged through the
storm sewer system
Rationale: MS4 programs are designed to reduce pollutant
discharges and protect water quality.
4. Which of the following is one of the six minimum control
measures for a regulated small MS4?
A. Drinking water treatment
B. Public education and outreach
C. Sewage sludge incineration
D. Air emissions monitoring
Correct Answer: B. Public education and outreach
Rationale: Public education and outreach is one of the six
required minimum control measures.
,5. How many minimum control measures are required under
the Phase II small MS4 program?
A. Four
B. Five
C. Six
D. Eight
Correct Answer: C. Six
Rationale: The Phase II program identifies six minimum control
measures.
6. Which activity is part of the illicit discharge detection and
elimination program?
A. Detecting unauthorized non-stormwater discharges
B. Increasing wastewater treatment capacity
C. Testing drinking water
D. Managing solid waste landfills
Correct Answer: A. Detecting unauthorized non-stormwater
discharges
Rationale: IDDE programs identify and eliminate inappropriate
discharges entering the MS4.
7. What is a stormwater outfall?
A. A location where an MS4 discharges to a receiving water or
other designated location
, B. A wastewater treatment laboratory
C. A groundwater monitoring well
D. A municipal water-storage tank
Correct Answer: A. A location where an MS4 discharges to a
receiving water or other designated location
Rationale: Outfalls are important points for mapping,
inspection, and evaluating MS4 discharges.
8. Which document generally describes how a regulated MS4
will implement its stormwater program?
A. SWMP
B. SDS
C. RCRA
D. SPCC
Correct Answer: A. SWMP
Rationale: A Stormwater Management Program (SWMP)
describes the BMPs, measurable goals, and activities used to
satisfy permit requirements.
9. What does BMP commonly mean in stormwater
management?
A. Basic Monitoring Procedure
B. Best Management Practice
