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AWWA Water Use Efficiency Grade1 -200
Practice Exam Questions & Answers Study
Guide Detailed Explanations (2026 Edition)
pdf
Q1. What is the primary goal of water use efficiency (WUE)
programs?
A) Increase water sales revenue
B) Reduce non-beneficial water use while maintaining benefits
C) Eliminate all outdoor watering
D) Replace all fixtures with the cheapest models
Answer: B
Rationale: WUE focuses on optimizing water use—reducing
waste without sacrificing economic, social, or environmental
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benefits. It differs from conservation which may restrict use
without maintaining output .
Q2. Which California law mandates urban water suppliers to
set annual water use targets?
A) Porter-Cologne Act
B) Sustainable Groundwater Management Act (SGMA)
C) Making Conservation a California Way of Life (SB 606/AB
1668)
D) Clean Water Act
Answer: C
Rationale: SB 606 and AB 1668 (2018) established long-term
water use efficiency standards, including indoor residential use
targets and water budgets for urban water suppliers .
Q3. What is "gallons per capita per day" (GPCD)?
A) Total water produced divided by population
B) Total residential water use divided by population served
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C) Irrigation water divided by landscape area
D) Industrial water use divided by employees
Answer: B
Rationale: GPCD measures average daily residential water use
per person. It excludes commercial, industrial, and system losses.
Grade 1 candidates must calculate and interpret GPCD .
Q4. What is "beneficial use" in water efficiency?
A) Any use that generates revenue
B) Use that supports health, safety, or economic well-being
C) Use of treated wastewater only
D) Any use approved by a watermaster
Answer: B
Rationale: Beneficial use includes domestic, agricultural,
industrial, and environmental needs that provide societal value
without waste .
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Q5. Which of the following is an example of "non-beneficial
use"?
A) Watering a vegetable garden at 6 AM
B) Runoff from over-irrigation onto a sidewalk
C) Washing clothes in a high-efficiency washer
D) Filling a swimming pool once per year
Answer: B
Rationale: Runoff provides no benefit and wastes water. Non-
beneficial use includes evaporation, runoff, leaks, and
overwatering .
Q6. What is the typical water saving from replacing a 3.5
gallon per flush (gpf) toilet with a 1.28 gpf HET?
A) 10%
B) 35%
C) 63%
D) 80%
AWWA Water Use Efficiency Grade1 -200
Practice Exam Questions & Answers Study
Guide Detailed Explanations (2026 Edition)
Q1. What is the primary goal of water use efficiency (WUE)
programs?
A) Increase water sales revenue
B) Reduce non-beneficial water use while maintaining benefits
C) Eliminate all outdoor watering
D) Replace all fixtures with the cheapest models
Answer: B
Rationale: WUE focuses on optimizing water use—reducing
waste without sacrificing economic, social, or environmental
,Page 2 of 121
benefits. It differs from conservation which may restrict use
without maintaining output .
Q2. Which California law mandates urban water suppliers to
set annual water use targets?
A) Porter-Cologne Act
B) Sustainable Groundwater Management Act (SGMA)
C) Making Conservation a California Way of Life (SB 606/AB
1668)
D) Clean Water Act
Answer: C
Rationale: SB 606 and AB 1668 (2018) established long-term
water use efficiency standards, including indoor residential use
targets and water budgets for urban water suppliers .
Q3. What is "gallons per capita per day" (GPCD)?
A) Total water produced divided by population
B) Total residential water use divided by population served
,Page 3 of 121
C) Irrigation water divided by landscape area
D) Industrial water use divided by employees
Answer: B
Rationale: GPCD measures average daily residential water use
per person. It excludes commercial, industrial, and system losses.
Grade 1 candidates must calculate and interpret GPCD .
Q4. What is "beneficial use" in water efficiency?
A) Any use that generates revenue
B) Use that supports health, safety, or economic well-being
C) Use of treated wastewater only
D) Any use approved by a watermaster
Answer: B
Rationale: Beneficial use includes domestic, agricultural,
industrial, and environmental needs that provide societal value
without waste .
, Page 4 of 121
Q5. Which of the following is an example of "non-beneficial
use"?
A) Watering a vegetable garden at 6 AM
B) Runoff from over-irrigation onto a sidewalk
C) Washing clothes in a high-efficiency washer
D) Filling a swimming pool once per year
Answer: B
Rationale: Runoff provides no benefit and wastes water. Non-
beneficial use includes evaporation, runoff, leaks, and
overwatering .
Q6. What is the typical water saving from replacing a 3.5
gallon per flush (gpf) toilet with a 1.28 gpf HET?
A) 10%
B) 35%
C) 63%
D) 80%
