STORMWATER INSPECTOR
CERTIFICATION EXAM QUESTION AND
CORRECT ANSWERS (VERIFIED
ANSWERS) PLUS RATIONALES 2026 Q&A
INSTANT DOWNLOAD PDF
1. What is the primary purpose of stormwater inspections?
A. To increase water pressure
B. To prevent pollution of receiving waters
C. To reduce construction costs
D. To improve landscaping aesthetics
Stormwater inspections focus on identifying and correcting sources of
pollution before runoff enters waterways.
2. Stormwater runoff is best defined as:
A. Groundwater seepage
B. Wastewater from treatment plants
C. Rainfall or snowmelt that flows over land surfaces
D. Water used for irrigation
Runoff occurs when precipitation flows over surfaces and does not
infiltrate the ground.
3. Which regulation in the U.S. governs stormwater discharges?
A. Safe Drinking Water Act
B. Clean Water Act
C. Resource Conservation and Recovery Act
D. Clean Air Act
The Clean Water Act establishes the framework for regulating pollutant
discharges into waters.
,4. What does NPDES stand for?
A. National Pollution Detection System
B. National Pollutant Discharge Elimination System
C. Natural Pollution Disposal Enforcement Standard
D. National Permit Discharge Evaluation System
NPDES is the permitting system regulating stormwater and other
discharges.
5. Which site typically requires stormwater inspection?
A. Residential backyard
B. Public library
C. Construction site disturbing soil
D. Indoor warehouse
Construction activities are major sources of sediment in stormwater.
6. Sediment is considered a pollutant because it:
A. Is always toxic
B. Degrades water quality and aquatic habitat
C. Increases oxygen levels
D. Prevents erosion
Sediment clouds water, harms organisms, and transports other pollutants.
7. Which BMP is used to control sediment?
A. Oil-water separator
B. Silt fence
C. Chemical neutralizer
D. Chlorination unit
Silt fences slow runoff and trap sediment.
8. The best time to inspect a site is:
A. During drought
B. During or after rainfall
C. Only at project completion
D. At night
Rain events reveal how runoff and BMPs actually perform.
9. What is a SWPPP?
A. Sewer Water Pollution Prevention Plan
, B. Stormwater Pollution Prevention Plan
C. Surface Water Protection Policy
D. Solid Waste Pollution Program
A SWPPP documents site conditions, BMPs, and inspection procedures.
10.Who is responsible for maintaining BMPs on a permitted site?
A. Inspector
B. Permittee/operator
C. Local residents
D. EPA only
The operator is legally responsible for compliance and maintenance.
11.Which pollutant commonly comes from vehicles?
A. Sediment
B. Oil and grease
C. Nutrients
D. Pathogens
Leaking fluids and exhaust residues contribute oil and grease.
12.Nutrient pollution mainly consists of:
A. Lead and mercury
B. Oil and grease
C. Nitrogen and phosphorus
D. Chlorine and fluoride
Excess nutrients cause eutrophication in water bodies.
13.A catch basin is designed to:
A. Store drinking water
B. Collect stormwater and debris
C. Treat wastewater
D. Increase infiltration
Catch basins trap debris before water enters the storm system.
14.Which BMP reduces runoff volume?
A. Silt fence
B. Infiltration trench
CERTIFICATION EXAM QUESTION AND
CORRECT ANSWERS (VERIFIED
ANSWERS) PLUS RATIONALES 2026 Q&A
INSTANT DOWNLOAD PDF
1. What is the primary purpose of stormwater inspections?
A. To increase water pressure
B. To prevent pollution of receiving waters
C. To reduce construction costs
D. To improve landscaping aesthetics
Stormwater inspections focus on identifying and correcting sources of
pollution before runoff enters waterways.
2. Stormwater runoff is best defined as:
A. Groundwater seepage
B. Wastewater from treatment plants
C. Rainfall or snowmelt that flows over land surfaces
D. Water used for irrigation
Runoff occurs when precipitation flows over surfaces and does not
infiltrate the ground.
3. Which regulation in the U.S. governs stormwater discharges?
A. Safe Drinking Water Act
B. Clean Water Act
C. Resource Conservation and Recovery Act
D. Clean Air Act
The Clean Water Act establishes the framework for regulating pollutant
discharges into waters.
,4. What does NPDES stand for?
A. National Pollution Detection System
B. National Pollutant Discharge Elimination System
C. Natural Pollution Disposal Enforcement Standard
D. National Permit Discharge Evaluation System
NPDES is the permitting system regulating stormwater and other
discharges.
5. Which site typically requires stormwater inspection?
A. Residential backyard
B. Public library
C. Construction site disturbing soil
D. Indoor warehouse
Construction activities are major sources of sediment in stormwater.
6. Sediment is considered a pollutant because it:
A. Is always toxic
B. Degrades water quality and aquatic habitat
C. Increases oxygen levels
D. Prevents erosion
Sediment clouds water, harms organisms, and transports other pollutants.
7. Which BMP is used to control sediment?
A. Oil-water separator
B. Silt fence
C. Chemical neutralizer
D. Chlorination unit
Silt fences slow runoff and trap sediment.
8. The best time to inspect a site is:
A. During drought
B. During or after rainfall
C. Only at project completion
D. At night
Rain events reveal how runoff and BMPs actually perform.
9. What is a SWPPP?
A. Sewer Water Pollution Prevention Plan
, B. Stormwater Pollution Prevention Plan
C. Surface Water Protection Policy
D. Solid Waste Pollution Program
A SWPPP documents site conditions, BMPs, and inspection procedures.
10.Who is responsible for maintaining BMPs on a permitted site?
A. Inspector
B. Permittee/operator
C. Local residents
D. EPA only
The operator is legally responsible for compliance and maintenance.
11.Which pollutant commonly comes from vehicles?
A. Sediment
B. Oil and grease
C. Nutrients
D. Pathogens
Leaking fluids and exhaust residues contribute oil and grease.
12.Nutrient pollution mainly consists of:
A. Lead and mercury
B. Oil and grease
C. Nitrogen and phosphorus
D. Chlorine and fluoride
Excess nutrients cause eutrophication in water bodies.
13.A catch basin is designed to:
A. Store drinking water
B. Collect stormwater and debris
C. Treat wastewater
D. Increase infiltration
Catch basins trap debris before water enters the storm system.
14.Which BMP reduces runoff volume?
A. Silt fence
B. Infiltration trench
