Virginia Environmental Health Specialist
Certification Exam Practice Questions
And Correct Answers (Verified Answers)
Plus Rationale 2026 Q&A| Instant
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1. What is the primary federal law that regulates the discharge of
pollutants into the waters of the United States?
A. Clean Air Act
B. Safe Drinking Water Act
C. Clean Water Act
D. Resource Conservation and Recovery Act
The Clean Water Act is the primary federal statute governing
pollutant discharges into U.S. waters to protect water quality.
2. Which pathogen is most commonly associated with waterborne
disease outbreaks in recreational water settings?
A. Hepatitis A
B. Cryptosporidium
C. Norovirus
D. Salmonella
Cryptosporidium is highly resistant to chlorine and a common cause
of recreational waterborne illness.
3. What is the minimum chlorine residual level generally required in a
public water distribution system?
A. 0.1 mg/L
B. 0.2 mg/L
, C. 2.0 mg/L
D. 5.0 mg/L
A minimum chlorine residual of 0.2 mg/L helps ensure effective
disinfection throughout the distribution system.
4. Which type of waste is regulated under the Resource Conservation
and Recovery Act (RCRA)?
A. Municipal solid waste
B. Hazardous household waste
C. Hazardous waste
D. Medical waste
RCRA specifically regulates the generation, transportation,
treatment, storage, and disposal of hazardous waste.
5. What is the primary purpose of a sanitary survey for a public water
system?
A. To inspect consumer plumbing
B. To assess potential contamination sources and system integrity
C. To measure water hardness
D. To test for volatile organic compounds
A sanitary survey evaluates sources, facilities, operational practices
and potential sanitary defects.
6. Which air pollutant is specifically targeted for reduction by the
National Ambient Air Quality Standards (NAAQS)?
A. Ozone-depleting compounds
B. Chlorofluorocarbons
C. Particulate matter (PM2.5)
D. Leaded gasoline
Particulate matter is one of the criteria pollutants for which NAAQS
sets limits to protect health.
7. What is the most effective method for controlling mosquito
populations to reduce vector-borne diseases?
A. Spraying herbicides
B. Eliminating standing water
C. Installing air purifiers
D. Increasing public lighting
, Removing standing water eliminates mosquito breeding habitats and
reduces populations.
8. In food service sanitation, what is the correct final rinse temperature
for dishwashing machines?
A. 120°F (49°C)
B. 140°F (60°C)
C. 180°F (82°C)
D. 200°F (93°C)
A final rinse of 180°F ensures proper sanitization in a high-
temperature dishwasher.
9. Which of the following is a biological hazard commonly monitored in
food establishments?
A. Lead
B. Salmonella
C. Asbestos
D. Benzene
Salmonella is a biological hazard that causes foodborne illness and
must be controlled in foodservice operations.
10. What insect vector is responsible for transmission of Lyme
disease?
A. Mosquito
B. Flea
C. Tick
D. Louse
Ticks are the vectors that transmit the bacterium causing Lyme
disease.
11. What is the acceptable pH range for most public swimming
pools?
A. 4.5–5.5
B. 7.2–7.8
C. 8.5–9.5
D. 10.0–11.0
A pH of 7.2–7.8 optimizes disinfection efficacy and swimmer comfort.
12. Lead contamination in drinking water is most often caused by:
A. Industrial wastewater discharge
Certification Exam Practice Questions
And Correct Answers (Verified Answers)
Plus Rationale 2026 Q&A| Instant
Download Pdf
1. What is the primary federal law that regulates the discharge of
pollutants into the waters of the United States?
A. Clean Air Act
B. Safe Drinking Water Act
C. Clean Water Act
D. Resource Conservation and Recovery Act
The Clean Water Act is the primary federal statute governing
pollutant discharges into U.S. waters to protect water quality.
2. Which pathogen is most commonly associated with waterborne
disease outbreaks in recreational water settings?
A. Hepatitis A
B. Cryptosporidium
C. Norovirus
D. Salmonella
Cryptosporidium is highly resistant to chlorine and a common cause
of recreational waterborne illness.
3. What is the minimum chlorine residual level generally required in a
public water distribution system?
A. 0.1 mg/L
B. 0.2 mg/L
, C. 2.0 mg/L
D. 5.0 mg/L
A minimum chlorine residual of 0.2 mg/L helps ensure effective
disinfection throughout the distribution system.
4. Which type of waste is regulated under the Resource Conservation
and Recovery Act (RCRA)?
A. Municipal solid waste
B. Hazardous household waste
C. Hazardous waste
D. Medical waste
RCRA specifically regulates the generation, transportation,
treatment, storage, and disposal of hazardous waste.
5. What is the primary purpose of a sanitary survey for a public water
system?
A. To inspect consumer plumbing
B. To assess potential contamination sources and system integrity
C. To measure water hardness
D. To test for volatile organic compounds
A sanitary survey evaluates sources, facilities, operational practices
and potential sanitary defects.
6. Which air pollutant is specifically targeted for reduction by the
National Ambient Air Quality Standards (NAAQS)?
A. Ozone-depleting compounds
B. Chlorofluorocarbons
C. Particulate matter (PM2.5)
D. Leaded gasoline
Particulate matter is one of the criteria pollutants for which NAAQS
sets limits to protect health.
7. What is the most effective method for controlling mosquito
populations to reduce vector-borne diseases?
A. Spraying herbicides
B. Eliminating standing water
C. Installing air purifiers
D. Increasing public lighting
, Removing standing water eliminates mosquito breeding habitats and
reduces populations.
8. In food service sanitation, what is the correct final rinse temperature
for dishwashing machines?
A. 120°F (49°C)
B. 140°F (60°C)
C. 180°F (82°C)
D. 200°F (93°C)
A final rinse of 180°F ensures proper sanitization in a high-
temperature dishwasher.
9. Which of the following is a biological hazard commonly monitored in
food establishments?
A. Lead
B. Salmonella
C. Asbestos
D. Benzene
Salmonella is a biological hazard that causes foodborne illness and
must be controlled in foodservice operations.
10. What insect vector is responsible for transmission of Lyme
disease?
A. Mosquito
B. Flea
C. Tick
D. Louse
Ticks are the vectors that transmit the bacterium causing Lyme
disease.
11. What is the acceptable pH range for most public swimming
pools?
A. 4.5–5.5
B. 7.2–7.8
C. 8.5–9.5
D. 10.0–11.0
A pH of 7.2–7.8 optimizes disinfection efficacy and swimmer comfort.
12. Lead contamination in drinking water is most often caused by:
A. Industrial wastewater discharge
