PowerPoint Presentation (updated 5/24/2024)*

Water Resources Update 
May 28, 2024

Presentation Overview
For Information and Discussion
Progress on expanded water conservation rebates
Proposing a new rebate program for non-residential 
water custom ers
For Information and Discussion
Update on watershed conditions
Continued drought preparation activities
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Water Conservation Rebates
Joanne Toms, Environmental Programs Administrator
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Landscape Rebate History
1986 – Council approved a $100 landscape rebate for 
residential custom ers
2005 – Council approved updates to the landscape 
rebate:
1. Increased rebate am ount for residential custom ers 
2. Created a new rebate for non-residential custom ers
2023 – Council approved funding to expand the water 
conservation rebate program
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Water Infrastructure Finance Authority (WIFA) 
Water Conservation Grant Fund
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2024 – WIFA awarded the City of Glendale Water 
Services Departm ent $450,000 to help expand the 
water conservation rebate program .
o Resolution No. R24-07

Current Water Conservation Rebate Program
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REBATE TYPE
SINGLE-FAMILY 
RESIDENTIAL
NON-RESIDENTIAL
WaterSense Toilet
Up to $150 $100
Up to $250
EnergySTAR Clothes 
Washer
Up to $200
Not Available
Landscape Conversion
Up to $3,000
Up to $10,000
WaterSense Irrigation 
Technology 
Up to $250
To be proposed
Pool/ Spa Rem oval
Up to $800
Not Available
Cooling Tower Technology
Not Available
Up to $1,000

Prom otion of Rebate Program
City Website and Social Media 
Channels
2024 Clean & Green Calendar
The Connection (City water bill insert)
On-hold m essages
Rack Cards
Conservation’s m onthly e-newsletter
Com m unity Events
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FY24 Water Conservation Rebate Sum m ary
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As of April 1, 2024

FY24 Water Conservation Rebate Sum m ary
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As of April 1, 2024
Total Rebates:
$ 95,389.27

Proposed – New Irrigation Technology Rebate 
for Non-Residential Custom ers
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Pilot-tested this through a U.S. 
Bureau of Reclam ation grant.
Up to $3,000 for WaterSense 
Certified Weather-based Irrigation 
Controllers.
Up to $1,000 for flow sensors and 
m aster valves with leak detection.
Up to $ 10,000 per customer per 
fiscal year.

Next Steps for Rebate Program
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Develop outreach m aterials and the online 
application for the new irrigation technology 
rebate for non-residential custom ers
Continue to prom ote the City’s water 
conservation rebates

Water Resources Update
Drew Swieczkowski, Water Resources Manager
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For inform ation and discussion:
2023 Glendale Potable Water Use
Conditions on the Salt River Project and Colorado River 
System s
Post-2026 Operations for the Colorado River
Future Water Resource Supplies
Next Steps 
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Water Resources Topics

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2023 Glendale Water Use
2023 Potable Water Use = 37,478 acre-feet
2022 Potable Water Use = 39,741 acre-feet
Central Arizona Project (CAP) - 36%
Salt River Project (SRP) - 61%
Groundwater (GW) - 3%
61%
36%
3%
Salt River Project
Central Arizona Project
Groundwater

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Water Use vs Water Supplies
2022 Water Use 
(AF)
(%)*
2023 Water Use 
(AF)
(%)*
Annual 
Supplies** 
(AF)
CAP Water
19,508 
(86%)
13,492   
(60%)
22,582
SRP Water
18,200   
(33%)
22,862   
(41%)
55,455
Groundwater
2,033      
(27%)
1,124     
(15%)
7,525
*Percentage of total annual supply
**Based on 2010 Designation of Assured Water Supply from ADWR.  Additional annual supplies are available but 
not included in this table.

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Glendale Effluent Production and Use
Effluent Produced in 2023 was about 15,200 acre-feet.
Recharge accounted for 43% of effluent use
Reuse accounted for 57% of effluent use:
o
Arrowhead area turf, golf courses, and lakes
o
Wastewater sent to 91 st Avenue Treatm ent Plant

Palo Verde Nuclear Generating Station (PVNGS) 

Tres Rios Wetlands

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Salt River Project Conditions
2023-24 Winter precipitation has been slightly 
above average.
Salt River and Verde reservoirs are currently 
92% full.
Last year, at this tim e, the total system was 
98% full.
Glendale’s New Conservation Space (NCS) 
Water is alm ost at capacity (27,250 acre-feet).  
The SRP System is in good shape.

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Colorado River Conditions
Precipitation in the Colorado River Watershed 
for Winter 2023-2024 is slightly above norm al.
Spring runoff is expected to be about average.
It is predicted that a sufficient transfer of water               
will occur from Lake Powell to Lake Mead in 
2024 to help m aintain lake water levels.
One or m ore favorable years of good winter 
precipitation will not restore the Colorado River 
system .

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Cuts to Arizona’s Colorado River Water
Reclam ation’s April 24-m onth study:
o Lake Mead will be in a Drought 
Contingency Plan (DCP) Tier 1 shortage 
starting on January 1, 2025 
o This is the sam e DCP Tier as in 2024
Under the DCP, a 2025 Tier 1 
shortage:
o Arizona’s Colorado River supply is 
reduced by 512,000 acre-feet
o No reduction in Glendale’s Colorado 
River supply due to DCP m itigation 
1,068’
(elevation on 
12/31/2023)

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Post-2026 Colorado River Guidelines
Starting in 2027, new Reclam ation Guidelines will be in place 
for the operation of Lake Powell and Lake Mead. 
Both the Upper and Lower Basin States have subm itted their 
own proposals for the new operating guidelines.
The Basin States, Mexico, Indian Com m unities, and others will  
all have to work together to com plete the Guidelines. 
The Lower Basin Proposal shows cuts of                                                    
up to 50% of Arizona’s CAP water. 
Guidelines are expected to be finalized in 2025.

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From Council Workshop in Septem ber 2022:

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Near-Term Water Resource Supplies
Water Exchanges: 
o Effluent and SRP supplies for Colorado River 
water
o Relative low cost for conducting the exchanges
o Require IGAs with partners and agreem ents and 
perm its with the ADWR, CAP and Reclam ation
Groundwater Wells:
o Two new wells have been drilled and are being 
equipped
o Two additional wells are in the CIP budget to be 
drilled
o Future wells are also being considered

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Long-Term : Bartlett Dam Modification
Current Activities:
o Partnered with SRP and other entities for 4 years at $100,000/ year 
for the Feasibility Study
o Determ ined Glendale’s assigned storage capacity (5,107 acre-feet)
Upcom ing Activities:
o Additional funds will be requested for design and construction
o Estim ate of cost is between $15 to $20 m illion
o Com m itm ent will be needed by 2026/ 2027
o Project is expected to be com pleted around 2033

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Long-Term : Advanced Water Purification
Take high-quality effluent, run it through advanced treatm ent 
processes (filtration, reverse osm osis, etc.), produce potable water.
This process has been dem onstrated to be safe and produce very 
high-quality drinking water.
This supply is considered a drought resistant source due to 
constant production of effluent.

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Advanced Water Purification
Exam ple: City of Phoenix is leading a project for the 91 st Ave 
Wastewater Treatm ent Plant
Glendale and other water providers are considering this technology 
through the City of Phoenix project
There would be an IGA for conceptual design and dem onstration 
plan at a cost of $150,000 to $200,000
Potential Tim eline:
Next two to three years to decide City’s participation
Project is expected to be operational in 2035

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Next Steps for Water Resources
Continue to m onitor watershed conditions and available supplies
Continue to evaluate options for short- and long-term water supplies
Update the City’s Drought Managem ent Plan based on new Colorado 
River System operating guidelines (post-2026) and present revisions 
to Mayor and Council at a future workshop (late 2025 or early 2026)
Contracts and agreem ents will be presented to Mayor and Council 
for consideration in future workshops and voting m eetings

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Questions?