Item 11 - Visual Slideshow provided by Staff at MeetingAdoption of the City of Poway’s
2020 Urban Water Management Plan &
2015 UWMP Addendum regarding Delta Reliance
•UWMPs are a water demand and supply planning document
•Framework for a 25-year planning horizon
•Supply reliability comparison of projected demands and
supplies under normal and drought year conditions
•Demonstrate ability to meet Regulatory Requirements such as
SB X7-7 target
•Discuss water conservation measures implemented and
planned
What is Included in an Urban Water Management Plan?
•Takes into consideration:
•Projected Population, Housing
and Commercial Growth
•Projected Water Demands
•Projected Water Supplies
•Potential Water Shortages and
Multiple Year Dry Conditions
Development of the 2020 UWMP
Single-Family
Residential
63%
Multi-Family
Residential
5%
Commercial
13%
Industrial
1%
Landscape
5%
Golf Course (Raw
Water)
6%
Agriculture
1%
Transfer to Other
Agencies
1%Losses
5%
Historic and Projected Water Demands
8,000
9,000
10,000
11,000
12,000
13,000
14,000
15,000
16,000
17,000
2001200220032004200520062007200820092010201120122013201420152016201720182019202020252030203520402045Acre FeetYear
Historical Projected (Average Year)Projected (Dry Year)Projected (Wet Year)
Supply & Demand Projections
•Demand
Projections
include:
•Historic water demand patterns
•Active and Passive
conservation
measures
•Recycled Water is our Local Supply
2025 2030 2035 2040 2045
Baseline Demand
Forecast 11,936 12,231 12,566 12,832 13,086
Conservation 1,399 1,437 1,527 1,665 1,590
Local Supplies 450 450 450 450 450
Supply & Demand on
SDCWA 10,087 10,344 10,589 10,717 11,046
GPCD*177 181 186 188 193
*All numbers except GPCD are in Acre Feet (325,851 gallons)
Poway’s Historic GPCD & SB X7-7 Goal
•Poway’s 2015 interim goal: 236 gpcd
•Poway’s SB X7 -7 2020 goal: 210 gpcd
•Average water use was 185 gpcd for 2010-2020
247 256
180 200 192 211 231
195
156 164
192
151
166
0
50
100
150
200
250
300
2008200920102011201220132014201520162017201820192020236
210
Multiple Dry Years Analysis
•Per UWMP requirements, a Drought Risk Assessment (DRA) needs to
be completed based on the five driest consecutive years on record.
•Years 2014 to 2018 were selected to align with the SDCWA’s DRA
•These years have the lowest local water supply production from surface and
groundwater
•SDCWA anticipates a surplus of water supplies in all five years of extended dry
period and would have enough supply to meet Poway’s increased demands
shown below
2021 2022 2023 2024 2025
Projected Normal Year Potable Demands
(AFY)9,455 9,726 9,996 10,267 10,537
Demand Projection Multiplier (Change from
Normal Year)*108%112%116%120%125%
Projected Five-Year Potable Drought
Demands (AFY)10,211 10,893 11,595 12,320 13,171
•State’s proposal for the Delta Conveyance Project requires an
Environmental Impact Report
•Assessment includes documentation from water agencies that
benefit from the Project to be included in their UWMP
•Poway’s report on expected outcomes for measurable
reductions in water supplies from the Delta watershed need
to be included in its 2015 and 2020 UWMP
•Poway’s analysis is based on the SDCWA’s assessment of
water supply reliability
Demonstration of Reduced Reliance on the Delta
Discussion
Requested Action Items:
1.Adopt the 2020 Urban Water Management Plan
2.Adopt the Addendum to the 2015 Urban Water
Management Plan
Projected Population & Housing Units
•Population
•Total growth rate: 0.004%
•Average annual growth rate:
0.001%
•Housing Units
•Total growth rate: 7%
•Average annual growth rate:
2%
•Estimated Persons/Unit:
•2025 –3.09
•2040 –2.90
0
15,000
30,000
45,000
60,000
2020 2025 2030 2035 2040 2045
Population 49,338 51,239 51,239 51,239 51,250 51,456
Population
0
5,000
10,000
15,000
20,000
2025 2030 2035 2040 2045
Housing 16,606 16,896 17,382 17,578 17,765
Housing
Population and Housing Data provided by SANDAG