Page 1 of 121
CA-NV AWWA Water Use Efficiency
Grade1 -200 Practice Exam Questions &
Answers Study Guide Detailed
Explanations (2026 Edition) pdf
1. 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 benefits. It
,Page 2 of 121
differs from simple “conservation” which may restrict beneficial
use .
2. 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 of
55 gpcd by 2025, dropping to 42 gpcd by 2030 .
3. What does “gallons per capita per day” (gpcd) measure?
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,
allowing comparisons across different sized communities .
4. 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 .
, Page 4 of 121
5. What is the typical water saving from replacing a 3.5 gpf
toilet with a 1.28 gpf HET?
A) 10 %
B) 35 %
C) 63 %
D) 80 %
Answer: C
Rationale: (3.5 − 1.28) ÷ 3.5 = 2.22/3.5 = 0.634 = 63.4 %
reduction per flush .
6. The term “water budget” in WUE refers to:
A) The amount of money allocated for water operations
B) An allocated volume of water for a specific landscape or
customer class
C) The state-mandated water price
D) The maximum capacity of a reservoir
CA-NV AWWA Water Use Efficiency
Grade1 -200 Practice Exam Questions &
Answers Study Guide Detailed
Explanations (2026 Edition) pdf
1. 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 benefits. It
,Page 2 of 121
differs from simple “conservation” which may restrict beneficial
use .
2. 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 of
55 gpcd by 2025, dropping to 42 gpcd by 2030 .
3. What does “gallons per capita per day” (gpcd) measure?
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,
allowing comparisons across different sized communities .
4. 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 .
, Page 4 of 121
5. What is the typical water saving from replacing a 3.5 gpf
toilet with a 1.28 gpf HET?
A) 10 %
B) 35 %
C) 63 %
D) 80 %
Answer: C
Rationale: (3.5 − 1.28) ÷ 3.5 = 2.22/3.5 = 0.634 = 63.4 %
reduction per flush .
6. The term “water budget” in WUE refers to:
A) The amount of money allocated for water operations
B) An allocated volume of water for a specific landscape or
customer class
C) The state-mandated water price
D) The maximum capacity of a reservoir
