Loading...
Item 11 - Adoption of the 2020 Urban Water Mgmt. Plan and Addendum to the 2015 Urban Water Mgmt. PlanJune 1, 2021, Item #11DATE: TO: FROM: CONTACT: SUBJECT: Summary: AGENDA REPORT CityofPoway June 1, 2021 Honorable Mayor and Members of the City Council Eric Heidemann, Director of Public Works ftJ<.. Jessica Parks, Utilities Administrator .:::J'? (858) 668-4703 or jparks@poway.org CITY COUNCIL Adoption of the City of Poway's 2020 Urban Water Management Plan and Addendum to the City of Poway's 2015 Urban Water Management Plan To confirm that water agencies are adequately planning to meet existing and future water demands under normal conditions and for extended dry periods, the California Department of Water Resources (DWR) requires water agencies that either provide over 3,000 acre-feet (AF) of water annually or serve more than 3,000 urban connections prepare an Urban Water Management Plan (UWMP). As the City of Poway (Poway) has approximately 14,200 water service connections and provides over 3,000 AF of water annually, staff has prepared Poway's 2020 UWMP which provides a framework for long-term water planning and develops a long-term water resource plan to ensure that enough water will be available to meet both current and planned water demands. Poway will also append its 2015 UWMP through an addendum to meet requirements of the Delta Plan Policy by demonstrating reduced regional reliance on the Delta. Recommended Action: It is recommended that the City Council take public input, close the public hearing, and adopt the Resolutions. Discussion: DWR requires urban water suppliers that either provide over 3,000 AF of water annually or serve more than 3,000 urban connections to submit an UWMP every five years (California Water Code §10610-§10656 and §10608). The format of the UWMP is highly prescribed by DWR in order to achieve informational consistency. Additionally, to be eligible for state grants and loan programs, an agency must have an updated DWR approved UWMP. Poway strives to continue to provide a safe and reliable supply of water to the customers within its service area through nearly 14,200 municipal service connections (as of 2020). To demonstrate future reliability, the 2020 UWMP discusses the following components: water demands, and system uses, 1 of 21 June 1, 2021, Item #11water use baselines and targets (to measure water conservation), water supplies, water supply reliability, water shortage contingency planning, and demand management measures. In order to comply with state law, Poway's 2020 UWMP must be finalized, adopted by the Council, and submitted to DWR by July 1, 2021. A public hearing must be held prior to the adoption of the 2020 UWMP and may be held in conjunction with the adoption hearing. Additionally, Poway will be appending its 2015 UWMP through an addendum to meet the requirements of the Delta Plan Policy WR P1 Reduce Reliance on the Delta through Improved Regional Water Self-Reliance (California Code of Regulations, Title 23 §5003) by demonstrating reduced regional reliance on the Delta. The 2020 UWMP will also meet the Delta Plan Policy WR P1 Delta requirements. 2020 UWMP Highlights Water Supply Reliability: The UWMP details the City's water reliability assessment through 2045. The City's water supply portfolio includes imported water purchased from the San Diego County Water Authority (SDCWA), recycled water purchased from the City of San Diego, and local surface water runoff from Lake Poway (which is variable and not included in the supply projections). Poway receives approximately 99% of its drinking water from SDCWA and therefore, Poway's UWMP is aligned with the SDCWA 2020 UWMP water supply and demand projections. SDCWA used a statistical modeling approach to develop its long-range demand forecast which included data from various sources including San Diego's Association of Governments (SANDAG) regional growth forecast. The SDCWA's 2020 UWM P reports that future imported and stored water would be sufficient to meet future demands of all its member agencies under normal conditions, as well as single dry year and multiple dry year assessments. The City utilized the demand forecast model prepared by SDCWA and Poway's historical water use data to formulate water use projections for 2025, 2030, 2035, 2040, and 2045. Poway's projected potable, raw, and recycled water demands are presented in Table 1 below. The projections also include active and passive conservation savings. "Active" conservation is water conserved by the implementation of demand management programs such as turf-replacement, or state-mandated water use reductions (e.g., no hosing off driveways, no runoff when irrigating, etc.). "Passive" conservation is water saved by the implementation of various regulations and codes such as appliance standards and the water efficiency landscape ordinance. Table 1: Total Potable and Raw Water Demands Total Potable and Raw Water Demands 2025 2030 2035 2040 2045 Baseline Water Demands 11,936 12,231 12,566 12,832 13,086 Recycled Water Demands (450) (450) (450) (450) (450) Active/Passive Conservation (1,399) (1,437) (1,527) (1,665) {1,590) Total Potable and Raw Water 10,087 10,344 10,589 10,717 11,046 Demands The total projected demands in Table 1 are Poway's forecasted water demands during an average year with normal precipitation as projected by the SDCWA. However, future water use in Poway is anticipated to be variable depending on the actual conditions throughout the year; and therefore, 2 of 21 June 1, 2021, Item #11water use during a dry year and wet year have also been projected based on Poway's historical demands and estimated range of demand projections founded on the type of year. Figure 1 illustrates projected demands during average, dry and wet years along with Poway's historical demands for the past twenty years. 17000 16000 15000 14000 +-' Q) 13000 Q) LL 2:: 12000 u <( 11000 10000 9000 8000 Figure 1: Historical and Projected Potable and Raw Water Demands -Historical -Projected (Average Year) Projected (Dry Year) -Projected (Wet Year) rl N rn ~ ~ ~ ~ oo m o rl N rn ~ ~ ~ ~ oo m o ~ o ~ o ~ o o o o o o o o o rl rl rl rl rl rl rl rl rl rl N N rn rn ~ ~ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 N N N N N N N N N N N N N N N N N N N N N N N N N Year Drought Risk Assessment: Pursuant to a new requirement from DWR, a water supplier must include in its 2020 UWMP a Drought Risk Assessment (DRA) to compare supplies and demands over a five-year consecutive dry period, or extended drought. Poway's ORA reports that during an extended drought, the City could purchase additional supplies from SDCWA to overcome shortages to fully meet projected demands. Table 2 demonstrates a dry five-year scenario with increased demands and supplies available. Table 2: Drought Risk Assessment Five-Year Drought Risk Assessment Table* 2021 2022 2023 2024 2025 Projected Normal Year 9,455 9,726 9,996 10,267 10,537 Demands (AFY) Demand Projection Multiplier 108% 112% 116% 120% 125% (Change from Normal Year) Projected Five-Year Drought 10,211 10,893 11,595 12,320 13,171 Demands (AFY) Total Supplies (AFY) 10,211 10,893 11,595 12,320 13,171 Surplus/Shortfall 0 0 0 0 0 Resulting % Use Reduction from 0% 0% 0% 0% 0% WSCP Action *Includes Recycled Water, Excludes Conservation 3 of 21 June 1, 2021, Item #11Compliance with SB Xl-7: The Water Conservation Act of 2009, known as SB X7-7, or 20% by 2020, required water suppliers to reduce their per person (or per capita) water use by at least 20% by the year 2020. Water suppliers that do not achieve the required water use reductions are potentially ineligible to receive State funding. Poway achieved its water use reduction goal, reducing water use by approximately 20% more than its target, as shown in Table 3. Poway's baseline gallons per person, per day (GPCD) was 263 GPCD. Poway was required to meet its SB X7-7 target of 210 GPCD by the end of 2020. Poway's actual 2020 per capita use was 167 GPCD. Table 3: SB X7-7 Target and Compliance SB X7-7 Target and 2020 Compliance Baseline GPCD SB X7-7 2020 Target Did Supplier Achieve (1999 -2008) GPCD Actual 2020 GPCD Targeted Reduction for 2020? 263 210 167 Yes Water Shortage Contingencv Plan: In order to comply with the State's new legislation, Poway developed a Water Shortage Contingency Plan (WSCP) to supplement its existing Water Conservation Plan (Poway Municipal Code Chapter 8.94). The City adopted the WSCP at its May 18, 2021 public hearing. Pursuant to the new legislation, Poway's WSCP addresses several new requirements, including, but not limited to: describing key attributes and procedures for conducting an annual water supply reliability assessment, crosswalk the State's six standard water shortage response levels to Poway's existing four levels, quantify estimated water savings associated with each shortage response action, describe communication protocols and public outreach measures, identify monitoring and reporting procedures to track compliance, and discuss methods to reevaluate and improve the WSCP. The WSCP document is included in the UWMP as Appendix G. The WSCP will be reviewed every five years in conjunction with the UWMP update and can also be updated as needed independent of the UWMP. 2015 UWMP Addendum on Delta Reliance: To address the requirements of the Delta Plan Policy WR P1 Reduced Reliance on the Delta Through Improved Regional Water Self-Reliance (California Code of Regulations, Title 23 §5003), Poway is required to append its 2015 UWMP through an addendum to demonstrate reduced reliance on the Delta. DWR has proposed the Delta Conveyance Project to develop new diversion and conveyance facilities in the Delta necessary to restore and protect the reliability of State Water Project (the conveyance of water from the San Joaquin/Bay Delta area to Southern California) water deliveries. As part of assessing whether to approve the Delta Conveyance Project, DWR is preparing an environmental impact report pursuant to the requirements of the California Environmental Quality Act. As Poway does benefit from the proposed Delta Conveyance Project, documentation is required to be included in the City's 2015 and 2020 UWMP. UWMP Adoption: DWR requires water suppliers to conduct a public hearing to consider adoption of the 2020 UWMP. To streamline the process of a public hearing for both the 2020 UWMP and the 2015 UWMP addendum, Poway has elected to hold one public hearing for both UWMPs to receive public comments and adopt separate resolutions for each UWMP. Attachment A is the resolution for the 2020 UWMP, and Attachment C is the resolution for the 2015 addendum. 4 of 21 Environmental Review: This item is not subject to review under the California Environmental Quality Act (CEQA). Fiscal Impact: None with this action. Public Notification: The draft 2020 UWMP report was posted to the City's website, https://poway.org/317/Water, on April 30, 2021. Water Code Section 10621 requires water agencies to notify key stakeholders, at least sixty days in advance of the public hearing, that the UWMP is being reviewed and changes to the plan are being considered. Notification letters were sent to SDCWA, the City of San Diego, City of Escondido, Ramona Municipal Water District, the County of San Diego, the San Diego Association of Governments, and the San Diego County Local Agency Formation Commission on March 9, 2021. Per Water Code §10642, and in accordance with Government Code §6066, a Notice of City Council Public Hearing was published in the Poway News Chieftain on Thursday, May 20, 2021. A second Notice of City Council Public Hearing was published in the same publication on Thursday, May 27, 2021. Attachments: A.Resolution Adopting the 2020 Urban Water Management Plan B.Executive Summary of the 2020 Urban Water Management Plan C.Resolution Adopting an Addendum to the 2015 Urban Water Management Plan on Delta Reliance D.Addendum for the 2015 UWMP Appendix H: Delta Reliance E.An electronic copy of the complete 2020 Urban Water Management Plan is available at https://poway.org/DocumentCenter/View/8190/Public-Review-Draft-2020-UWMP Reviewed/ Approved By: Assistant City Manager 5 of 21 Reviewed By: Alan Fenstermacher City Attorney Approved By: City Manager June 1, 2021, Item #11 June 1, 2021, Item #11RESOLUTION NO. 21-XX A RESOLUTION OF THE CITY COUNCIL OF THE CITY OF POWAY, CALIFORNIA, ADOPTING THE CITY OF POWAY'S 2020 URBAN WATER MANAGEMENT PLAN WHEREAS, the California legislature enacted Assembly Bill 797 (Water Code §10610 et. seq., known as the Urban Water Management Planning Act of 1983, and as amended subsequently) (the "Act"), which mandates that every supplier providing water for municipal purposes to more than 3,000 customers or supplying more than 3,000 acre-feet of water annually, prepare an Urban Water Management Plan (the "Plan"), the primary objective of which is to plan for the conservation and efficient use of water; and WHEREAS, the City of Poway is an urban water supplier that provides service to approximately 14,200 connections (potable, raw, and recycled); WHEREAS, the Act requires the Plan to be reviewed at least once every five years, and that the City of Poway make any amendments or changes to its Plan which are indicated by the review; WHEREAS, in compliance with the Act the City of Poway has adopted a Plan in 1996 (Resolution No. 96-003), which was reviewed and modified by a Plan in 2000 (Resolution No. 00-118), which was reviewed and modified by a Plan in 2005 (Resolution No. 05-096), which was reviewed and further modified by a Plan in 2011 (Resolution No. 11-030), and which was most recently reviewed and modified by a Plan in 2016 (Resolution No. 16-015) (the "2015 Plan"); WHEREAS, the 2015 Plan was reviewed for consistency and compliance with the Act, resulting in the development of a new Plan (the "2020 Plan"), which is required to be submitted electronically to the California Department of Water Resources (DWR) by July 1, 2021, after public review and hearing; and a copy filed with the DWR and California State Library within thirty days of adoption; WHEREAS; while preparing the 2020 Plan, the City of Poway coordinated its efforts with other appropriate agencies in the area, including the San Diego County Water Authority, County of San Diego, City of San Diego, City of Escondido, Ramona Municipal Water District, San Diego County Local Agency Formation Commission and San Diego Association of Governments; WHEREAS; the City of Poway has prepared the 2020 Plan, which modifies the 2015 Plan, and evaluates future water supplies and demands over the next 25 years to assist with planning reasonable and beneficial use of water; tracks water conservation compliance; and provides information to the public about water supplies and water management programs in the Poway service area; and WHEREAS; the 2020 Plan was on file at the City of Poway Public Works Administration Building, on the City of Poway's website, and available for review by the public prior to a properly noticed public hearing held by the Poway City Council regarding said Plan on June 1, 2021. 6 of21 ATTACHMENT A June 1, 2021, Item #11NOW, THEREFORE, BE IT RESOLVED by the City Council of the City of Poway as follows: SECTION 1: In accordance with California Water Code §10652 of the Act, the preparation and adoption of the 2020 Plan is not subject to the California Environmental Quality Act Division 13 (commencing with section 21000) of the Public Resources Code. SECTION 2: The City of Poway 2020 Urban Water Management Plan is hereby approved and adopted by changes incorporated by the City Council as a result of input received (if any) at the public hearing and ordered filed with the City Clerk. The 2020 Plan hereby changes and replaces the 2015 Plan, which shall no longer be the Plan for the City of Poway effective immediately. SECTION 3: In accordance with Water Code§ 10621 (d) and 10644(a)(1 )-(2), an electronic copy of the Plan and Resolution will be submitted to DWR no later than July 1, 2021. SECTION 4: The City Clerk is hereby authorized and directed to file the 2020 Plan with the DWR and the California State Library within 30 days after this date. PASSED, ADOPTED AND APPROVED at a Regular Meeting of the City Council of the City of Poway, California on the 1st day of June 2021 by the following vote, to wit: AYES: NOES: ABSENT: DISQUALIFIED: Steve Vaus, Mayor ATTEST: Vaida Pavolas, CMC, City Clerk 7 of 21 June 1, 2021, Item #11City of Poway 2020 Urban Water Management Plan Executive Summary The City of Poway (City or Poway) has prepared this 2020 Urban Water Management Plan (2020 UWMP or Plan) in accordance and compliance with the Urban Water Management Planning Act (UWMP Act). Poway's 2020 UWMP serves as the long-term planning document that will help to ensure the City can provide its customers with reliable water supplies through 2045. Pursuant to the requirements of CWC §10630.5, this Executive Summary (ES) provides a simple lay description of the information needed to provide a general understanding of this Plan and includes a description of the City's reliable water supplies, anticipated challenges, and strategies for managing system reliability risks. Each of the chapters included in this Plan are summarized in the subsequent sections, with key findings highlighted. ES 1. Introduction and Overview Poway strives to continue to provide a safe and reliable supply of water to the customers within its service area through 14,195 municipal service connections (as of2020). Under the UWMP Act, Poway is required to prepare an UWMP to provide a framework for long-term water planning and to develop a long-term water resource plan to ensure that enough water will be available to meet both current and planned customer water uses, also known as demands. This UWMP discusses the following components as related to the supplier: water demands and system uses, water use baselines and targets (to measure water conservation), water supplies, water supply reliability, water shortage contingency planning, and demand management measures. Poway is one of 24 member agencies of the San Diego County Water Authority (SDCWA), a water supply wholesaler. The City is known as a retail water supplier because it supplies water directly to customers. The City purchases all of its potable (or safe to drink) water supplies from the SDCWA in the form of raw, untreated water and treats the imported water to drinking water standards at the City's Lester J. Berglund Water Treatment Plant (WTP). Therefore, the City has coordinated this Plan with the SDCWA to accurately estimate its future water supplies. The City selected to report its data for this UWMP on a fiscal year basis as opposed to a calendar year basis, with fiscal year 2020 being the period between July 1, 2019 and June 30, 2020. The City chose to report water volumes in units of acre-feet (AF). One AF equals about 326,000 gallons, or enough water to cover an acre of land, about the size of a football field, one foot deep. ES 2. System Description The City of Poway encompasses approximately 39 square miles within San Diego County and is situated roughly 20 miles north of downtown San Diego. A map of the City and its water service area boundary is presented in Figure ES-1. The easternmost portion of the Poway (East Poway) is not connected to the municipal water system, and residents in this area receive their water from private groundwater wells. While this unconnected portion of the City is large in land area (about 29% of the City's total area), the unconnected population is relatively small (less than 1 % of the City's total population). Because population density significantly varies between the connected and unconnected portions of the City, Poway's service area population was estimated as 49,062 (as of 2020) using an alternative calculation method approved by California Department of Water Resources (DWR), which consisted of estimating the population of East Poway and subtracting it from the City's total population. The City's service area is mostly developed, and its population is only projected to increase by approximately 2,11 people, or roughly 4%, over the next 25 years. These regional growth projections are based on the San Diego Association of Governments (SAND AG) Series Public Review Draft Page ES-1 8 of 21 May 2021 ATTACHMENT B June 1, 2021, Item #11City of Poway 2020 Urban Water Management Plan 14 (Version 17) Regional Growth Forecast, which was developed for its 2019 Federal Regional Transportation Plan and adopted by SANDAG's Board of Directors on October 25, 2019. Figure ES-1: Poway Service Area and City Boundary Legend D City of Poway Boundary Poway Water Service Area ,----___...~ Waterbody Poway's climate is typical of a Southern California coastal valley, with mild-to-moderate temperatures, marine breezes, and low humidity. In the City, average annual temperature is 72 degrees and average annual rainfall is between 9 and 14 inches. Poway experiences lower than average rainfall compared to the rest of the country and receives most of its rainfall within a relatively short period of time, both of which can present challenges to water supply planning. Most of the rainfall in the San Diego region occurs during the winter and spring months, creating a wet and a dry season. As a result, the City typically experiences two very different water consumption patterns, one during the wet season and another during the dry season, when outdoor water use significantly increases in response to little or no rainfall. Poway's WTP, reservoirs, distribution system, and billing system are all designed to accommodate weather-related variations in water use. Public Review Draft Page ES-2 9 of 21 May 2021 June 1, 2021, Item #11City of Poway 2020 Urban Water Management Plan Poway's General Plan and land use priority is to preserve a balance between the community's rural character and well-planned residential, commercial, and industrial development. The City largely supplies water to residential customers within its service area, which make up roughly 90% of Poway's customer base (as of 2020), and primarily consist of single-family residences. The remaining 10% of Poway's customer base includes commercial, industrial, landscape, and agricultural users. Poway has experienced a significant increase in commercial and light industrial development over the past 25 years, primarily due to development of the South Poway Business Park (Business Park), a 900-acre complex offering tenants high-quality infrastructure, numerous amenities, and plenty of open space in keeping with the City's rural surroundings. Poway does not expect a significant increase in commercial and industrial development in the future. Although there are some parcels still available for development within the Business Park, the complex has largely reached its maximum capacity. Poway does not have any significant demographic factors that would affect its water management planning. ES 3. System Water Use In fiscal year 2020, total potable and raw water demand in the City's service area was 8,774 AF (not including recycled water) as shown in Figure ES-2, of which 68% was for residential use (63% for single-family and 5% for multi-family), 11 % was for landscape use (6% of which consists of the raw water used to irrigate one commercial golf course), 13% was for commercial use, 1 % was for industrial use, and less than 1 % was for agriculture use. The City also sold 79 AF of treated water to SDCWA for sales to Ramona Municipal Water District. In 2020, total potable and raw water demand per person within the City's service area was approximately 158 gallons per capita per day (GPCD). Figure ES-2: 2020 Actual Water Use by Sector for Potable and Raw Water Agriculture <1% Landscape (Raw Water) 6% Landscape 5% Industrial 1% Commercial 13% Multi-Family Residential 5% Public Review Draft Page ES-3 10 of 21 Transfers to Other agencies 1% Losses 5% Single Family Residential 63% Single Family ■ Multi-Family ■ Commercial ■ Industrial I nstitutiona 1/Governmenta I ■ Landscape ■ Landscape (Raw Water) ■ Agriculture ■ Transfers to Other agencies ■ Other Losses May 2021 June 1, 2021, Item #11City of Poway 2020 Urban Water Management Plan Figure ES-3 presents Poway's historical (2010-2020) and projected (2025-2045) potable and raw water use. Figure ES-3: Historical and Projected Potable and Raw Water Demands 13,000 --Historical --Projected (Dry Year) 12,500 --Projected (Average Year) Projected (Wet Year) 12,000 11,500 11,000 LL ~ 10,500 "'O ; 10,000 E (1) 9,500 Cl 9,000 8,500 8,000 2010 2015 2020 2025 2030 2035 2040 2045 Year After dropping to a low of 9,021 AF in 2016 as a result of the State-mandated water use restrictions that were implemented during the drought, Poway's water use began to rebound. Although mandatory restrictions were lifted when drought conditions ended in 2017, water conservation and demand reduction measures have had a lasting effect on decreasing water use within the City's service area. Post-drought water use reached a high of 10,904 AF in 2018, compared to a pre-drought high of 12,681 AF in 2014. The "Projected (Average Year)" potable and raw demands presented in Figure ES-3 represent Poway's water use during a typical average year with normal precipitation as forecasted by the SDCWA (refer to Table 2-8 of SDCWA's 2020 UWMP). However, future water use in Poway is anticipated to be variable depending on the actual conditions throughout the year; and therefore, water use during a dry year and wet year have also been projected in Figure ES-3 based on Poway's historical demands. Poway supplied 411 AF of recycled water in fiscal year 2020, making its total potable, raw, and recycled water demand equal to 9,185 AF. By 2045, the City's total potable, raw, and recycled water demands (based on an average year) are projected to reach 11,496 acre-feet per year (AFY), which represents a 25% increase from the fiscal year 2020 demands. Because the City's recycled water demands are projected to remain constant around 450 AFY, this projected increase in total demand is expected to result from an increase in potable water demand as shown in Figure ES-4. Public Review Draft Page ES-4 11 of 21 May 2021 June 1, 2021, Item #11City of Poway 2020 Urban Water Management Plan Figure ES-4: Projected Demands for Potable, Raw, and Recycled Water by Use Sector Single Family ■ Multi-Family ■ Comme1-cial ■ Industrial ■ Landscape ■ Landscape (Raw Wate1-) 13,000 ■ Agriculture ■ Transfers to Other agencies Losses ■ Recycled 12,000 11,000 10,000 9,000 U::-8,000 ~ 7,000 -0 C ro 6,000 E Cl) Q 5,000 4,000 3,000 2,000 1,000 2020 2025 2030 2035 2040 2045 Year ES 4. SB X7-7 Baselines, Targets, and 2020 Compliance The Water Conservation Act of 2009, known as SB X7-7, requires the City to reduce its per person (or per capita) water use by at least 20% by the year 2020. Water suppliers that do not achieve the required water use reductions are potentially ineligible to receive State funding. As a result, SB X7-7 has been a driver of suppliers' efforts to establish, promote, and prioritize water conservation programs and demand management measures to reduce water use. Suppliers measure compliance with SB X7-7 by calculating baseline water use and comparing it to an established water use target. The City met its required water use reduction and is in compliance with SB X7-7. The City's actual water use in fiscal year 2020 was 167 GPCD, which is approximately 21 % less than its 2020 target water use of 210 GPCD. ES 5. System Supplies The City's water supply portfolio includes imported water purchased from the SDCWA, local surface water runoff from Lake Poway (which is variable and not included in the supply projections), and recycled water purchased from the City of San Diego. The City of Poway imports 99% of its water supplies from SDCWA, which are treated to drinking water standards at the City's WTP, along with any local water supplies obtained from Lake Poway. In fiscal year 2020, the City purchased 9,374 AF of imported raw water from the SDCWA. The SDCWA purchases water from the Metropolitan Water District of Southern California (MWD), sourced from both the Colorado River Aqueduct (CRA) and the State Water Project (SWP). The SDCWA also purchases desalinated seawater, which is treated to drinking water standards at the Claude "Bud" Lewis Carlsbad Desalination Plant (Carlsbad Desai Plant). Public Review Draft Page ES-5 12 of 21 May 2021 June 1, 2021, Item #11City of Poway 2020 Urban Water Management Plan In fiscal year 2020, Poway purchased 411 AF of recycled water from the City of San Diego to supply to its customers. Currently, the City provides recycled water for landscape irrigation in the South Poway Business Park. The City can purchase up to 650 AFY from the City of San Diego and will continue to explore feasible and cost-effective options to expand its recycled water use in the future. Additionally, the North County One Water Program could supply an estimated 18,000 AFY to 25,000 AFY or more of purified recycled water to the San Diego region for potable reuse by 2035. The City is supportive of this future project and is interested in purchasing up to 2,000 AFY of recycled water from it. Because this project is still considered "conceptual", meaning that it is in the pre-planning or pre-feasibility analysis stage, it was not factored into the City's future supply projections for this Plan. ES 6. Water Supply Reliability This Plan presents the City's water reliability assessments from 2025 through 2045. Consistent with the UWMP Act requirements, each assessment compares total projected water supply to total projected water demands in five-year increments over the next 20 years under the following scenarios: • Normal water year • Single dry-year • Multiple dry-year The purpose of this analysis is to help to identify whether potential supply reliability issues exist under the various hydrologic scenarios evaluated. As demonstrated in this section, no water shortages are projected under any of the hydrologic scenarios evaluated. The SDCWA's 2020 UWMP reports that it anticipates imported and stored water would be sufficient to meet future demands of its member agencies under the single dry year and multiple dry year assessment when accounting for changes in local supply availability and regional demands. Therefore, Poway could purchase additional supplies from the SDCWA to meet increased water demands. The City's recycled water supply is considered "drought-proof' because it is typically not vulnerable to drought conditions. Poway's recycled water supplier, the City of San Diego, also has the capacity to increase recycled water deliveries to Poway, up to 650 AFY, should recycled water demands increase during drought conditions. The reliability assessment results concluded that projected available supplies would meet anticipated demands, demonstrating that the City's water supply mix is reliable and drought resilient. Pursuant to a new requirement, a water supplier must also include in its 2020 UWMP a drought risk assessment (ORA) to compare supplies and demands over a five-year consecutive dry period, or extended drought. Based on the SDCWA's drought assessment presented in its 2020 UWMP, which showed sufficient supplies to meet member agency demands, Poway's ORA (evaluated for the years 2021 -2025) also assumed that the City could purchase additional supplies from the SDCWA to overcome shortages and concluded that projected available supplies would meet anticipated demands, demonstrating resiliency. ES 7. Water Shortage Contingency Plan The Water Shortage Contingency Planning chapter of this UWMP discusses the potential actions that Poway could take to address supply shortages due to a catastrophe, drought, or other supply disruption. It also highlights elements of the City's Water Conservation Plan, also known as its Water Shortage Contingency Plan (WSCP), including specific actions to be taken in response to various water shortage levels and the process of performing an annual water supply and demand assessment (Annual Assessment) to evaluate short-term reliability for the upcoming fiscal year. If the Annual Assessment anticipates that demands will exceed available supply, Poway's City Council will vote to Public Review Draft Page ES-6 13 of 21 May 2021 June 1, 2021, Item #11City of Poway 2020 Urban Water Management Plan determine the appropriate water shortage level and associated actions necessary to reduce demand to ensure adequate supply. Poway's WSCP (Water Conservation Plan, Poway Municipal Code Chapter 8.94) serves as the City's guiding document to respond to water shortages and includes information on the process to prepare the Annual Assessment; the water shortage levels, their response actions, and the expected water savings; and penalties for violating Chapter 8.94. The City activates its water shortage response levels in accordance with the levels, and associated mandatory water use restrictions, activated by the SDCWA. Pursuant to new 2018 legislation that was adopted in response to the recent severe drought, water suppliers must address several new requirements in their WSCPs, one of which includes updating from four (4) to six (6) standard water shortage response levels (progressive ranges of 10%, 20%, 30%, 40%, 50%, and greater than 50% shortage) or cross-walking the six (6) standard levels to the supplier's existing four (4) stages. The City's WSCP will be updated to comply with the new requirements and will be considered for adoption at a public hearing on May 18, 2021. ES 8. Demand Management Measures The Water Code defines "Demand Management" as water conservation measures, programs, and incentives that prevent the waste of water and promote reasonable and efficient use and reuse of available supplies. Demand management measures (DMMs) are developed and implemented for the purpose of reducing overall demand on a water supplier. Demand reductions can be achieved using several methods including water conservation, which is a relatively low-cost way to supplement water supply that is typically easy to implement. Water conservation measures have evolved over time. In the 1990s, DMMs were focused on reducing indoor water use, mainly through replacement of low-efficiency plumbing fixtures (i.e., toilets, showerheads) with more efficient, low-flow fixtures. Once significant reductions in indoor water use were realized as a result of fixture replacement, new measures focused on reducing outdoor water use were implemented and remain the primary focus of today's DMMs. Water conservation is a key component in Southern California's strategy to meet water demand, and Poway has demonstrated its commitment to water use efficiency and conservation by proactively supporting City, SDCWA, and MWD water conservation programs since the early 1990s. Water conservation programs offered by the City, either on its own or in combination with the Water Authority and MWD, include: • Water conservation rebates and incentives • Commercial and residential conservation audits and surveys • Professional and residential workshops • Public outreach and education (i.e., newsletters) • Large landscape budgets (i.e., Turf Replacement Program) Additionally, adoption of SB X7-7 in 2009, as discussed in Section ES-4, has promoted DMMs for the purpose of reducing demands to meet the required water use reductions. The City's participation in these water conservation programs aided in the achievement of its targeted reduction and compliance with SB X7-7. Table ES-1 presents a summary of Poway's participation in rebate and incentive programs over the past five years. Public Review Draft Page ES-7 14 of 21 May 2021 June 1, 2021, Item #11City of Poway 2020 Urban Water Management Plan Table ES-1: Summary of Poway's Participation in Rebate and Incentive Programs Program City of Poway Participation (2016-2020) Regional WaterSmart Turf Replacement 7 4 rebates issued for replacement of over 78,000 and Sustainable Landscapes Programs square feet of turf 855 rebates issued for installation of over 2,061 SoCal Water$mart Residential Program indoor and outdoor water-efficient devices, contributing to an estimated savings of nearly 246 acre-feet of water over the devices' useful lives. 24 rebates issued for installation of over 9,029 indoor SoCal Water$mart Commercial, and outdoor water-efficient devices, contributing to an Industrial, and Institutional (CII) Program estimated savings of nearly 182 acre-feet of water over the devices' useful lives. Audits and Surveys 104 WaterSmart Checkups and 6 landscape irrigation surveys performed ES 9. Plan Adoption, Submittal, and Implementation The City will hold a public hearing to review public comments on its Draft WSCP on Tuesday, May 18, 2021. The City will hold another public hearing on Tuesday, June 1, 2021 to review public comments on its Draft 2020 UWMP and an Addendum to the 2015 UWMP on Delta Reliance. Poway's 2020 UWMP, WSCP, and Addendum to the 2015 UWMP Delta Reliance will be considered for adoption immediately following each respective public hearing with conditions to address public comments included in the adopted resolutions, if applicable. At least 60 days prior to the public hearing, on March 9, 2021, the City notified the appropriate agencies, cities, and counties. The City will also publish notices of each public hearing in the Poway News Chieftain, a local newspaper of general circulation, twice ( once a week for two successive weeks), pursuant to Government Code 6066. Copies of the Notices of Public Hearing published in the Poway News Chieftain, the City Council agenda reports, and the signed resolutions of adoption will be included as an appendix to the final UWMP. Following adoption, the City will submit its final 2020 UWMP and WSCP to DWR electronically through DWR's online submittal tool within 30 days. Public Review Draft Page ES-8 15 of 21 May 2021 June 1, 2021, Item #11RESOLUTION NO. 21-XX A RESOLUTION OF THE CITY COUNCIL OF THE CITY OF POWAY, CALIFORNIA, ADOPTING AN ADDENDUM TO THE 2015 URBAN WATER MANAGEMENT PLAN WHEREAS, the California legislature enacted Assembly Bill 797 (Water Code §10610 et. seq., known as the Urban Water Management Planning Act of 1983, and as amended subsequently) (the "Act"), which mandates that every supplier providing water for municipal purposes to more than 3,000 customers or supplying more than 3,000 acre-feet of water annually, prepare an Urban Water Management Plan (the "Plan"), the primary objective of which is to plan for the conservation and efficient use of water; WHEREAS, the City of Poway is an urban water supplier that provides service to approximately 14,200 connections (potable, raw, and recycled). WHEREAS, the Act requires the Plan to be reviewed at least once every five years, and that the City of Poway make any amendments or changes to its Plan which are indicated by the review; WHEREAS, pursuant to the Sacramento-San Joaquin Delta Reform Act of 2009 (Water Code §85000, et seq.), the Delta Plan, and Water Code §85201, which declares that the State's policy is to "reduce reliance on the Delta in meeting California's future water needs through a statewide strategy of investing in improved regional supplies, conservation, and water use efficiency," urban water suppliers are encouraged by the California Department of Water Resources (DWR) and the Delta Stewardship Council (DSC) to consider adopting an Addendum to their 2015 Plans to demonstrate consistency with the Delta Plan Policy WR P1 to Reduce Reliance on the Delta Through Improved Regional Water Self-Reliance (Cal, Code Regs. Title 23, §5003); WHEREAS, the City of Poway has prepared an Addendum to its 2015 Plan in accordance with the Delta Plan Policy WR P1, and in accordance with applicable legal requirements, has undertaken certain coordination, notice, public involvement, public comment, and other procedures in relation to its Addendum; WHEREAS; in accordance with the Act and Delta Plan Policy WR P1, the City of Poway has prepared its Addendum to the 2015 Plan with its own staff, with the assistance of consulting professionals, and in cooperation with other governmental agencies, and has utilized and relied upon industry standards and the expertise of industry professionals in preparing its Addendum to its Plan, and has also utilized DWR's Urban Water Management Plan Guidebook 2020, including its related appendices, in preparing its Addendum to the 2015 Plan; WHEREAS; in accordance with applicable law, including Water Code §10642, and Government Code §6066, a Notice of a Public Hearing regarding Poway's Addendum to the 2015 Plan was published in the Poway News Chieftain on Thursday, May 20, 2021, and a second Notice of City Council Public Hearing was published in the same publication on Thursday, May 27, 2021; and WHEREAS; in accordance with applicable law, including but not limited to Water Code §10642, a public hearing was held on June 1, 2021 in order to provide members of the public and other interested entities with the opportunity to be heard in connection with proposed adoption of the Addendum to the 2015 Plan and issues related thereto. 16 of 21 ATTACHMENT C June 1, 2021, Item #11NOW, THEREFORE, BE IT RESOLVED by the City Council of the City of Poway as follows: SECTION 1: In accordance with California Water Code §10652 of the Act, the preparation and adoption of the Plan, including addenda thereto, is not subject to the California Environmental Quality Act Division 13 (commencing with section 21000) of the Public Resources Code. SECTION 2: The Addendum to the City of Poway's 2015 Urban Water Management Plan to demonstrate consistency with the Delta Plan Policy to Reduce Reliance on the Delta Through Improved Regional Water Self-Reliance is hereby approved and adopted as amended by changes incorporated by the City Council as a result of input received (if any) at the public hearing and ordered filed with the City Clerk; SECTION 3: In accordance with Water Code§ 10621 (d) and 10644(a)(1 )-(2), an electronic copy of the Addendum and Resolution will be submitted to DWR no later than July 1, 2021. SECTION 4: The City Clerk is hereby authorized and directed to file the Addendum to the 2015 Plan with the DWR and the California State Library within 30 days after this date. PASSED, ADOPTED AND APPROVED at a Regular Meeting of the City Council of the City of Poway, California on the 1st day of June 2021 by the following vote, to wit: AYES: NOES: ABSENT: DISQUALIFIED: Steve Vaus, Mayor ATTEST: Vaida Pavolas, CMC, City Clerk 17 of 21 June 1, 2021, Item #11City of Poway 2015 Urban Water Management Plan Appendix H. Addendum on Delta Reliance Appendices 18 of 21 ATTACHMENT D June 2020 June 1, 2021, Item #11Reporting on Reduced Delta Reliance Regulatory Background Urban water suppliers that anticipate participating in or receiving water from a proposed project, such as a multiyear water transfer, conveyance facility, or new diversion that involves transferring water through, exporting water from, or using water in the Sacramento-San Joaquin Delta (Delta) are required to demonstrate reduced reliance on the Delta in their 2015 and 2020 Urban Water Management Plans (UWMPs) that can then be used in the certification of consistency process to demonstrate consistency with Delta Plan Policy WR Pl, Reduce Reliance on the Delta Through Improved Regional Water Self-Reliance (California Code Regulations, Title 23, §5003}.1 The Delta Plan Policy WR Pl identifies UWMP as the tool to demonstrate consistency with the state policy that suppliers that carry out or take part in covered actions must reduce their reliance on the Delta. 2 The City of Poway's (City or Poway) information on its reduced reliance on the Delta is documented below and can be used in future certifications of consistency with WR Pl for potential future water supply covered actions in the Delta. City of Poway Reliance on Delta Watershed Poway currently purchases about 99% of its water supply from the San Diego County Water Authority (SDCWA). All of the water the City purchases from SDCWA is raw water, which is treated at the City's Water Treatment Plant (WTP) and distributed to customers through the City's potable water system. Purchased water from the SDCWA includes both raw imported water and a blend of treated imported and desalinated seawater. The rest of Poway's supply comes from two sources, raw water from Lake Poway and recycled water from the City of San Diego. Lake Poway captures a small amount of rain and surface runoff during rain events; however, because the quantity of Lake Poway runoff is relatively minimal, not reliable, and offset by naturally occurring evaporation and seepage, it is not considered a planned water supply source. Therefore, nearly all of Poway's potable water is sourced from the SDCWA through raw water purchases. SDCWA's imported water supplies are primarily sourced from the Colorado River via transfers from Imperial Irrigation District (IID), and from the State Water Project (SWP) and Central Valley Project (CVP} via Metropolitan Water District of Southern California (MWD). Poway's only imported water supplies that originate in the Delta watershed are imported water supplies delivered by the SDCWA via the Metropolitan Water District of Southern California (MWD). Recognizing that the Delta supplies are threatened by uncertain long-term reliability issues associated with drought shortages, climate change, seismic events, environmental impacts, and flow restrictions, and that imported water purchases are becoming increasingly expensive, the City has taken actions to reduce demand for imported water from SDCWA, as supplied by MWD, and is continuing to explore future opportunities to continue to reduce its reliance on imported water. 1 Draft Urban Water Management Plan Guidebook 2020, California Department of Water Resources, August 2020, p. C-1. 2 Ibid., p. C-2. 19 of 21 June 1, 2021, Item #11As part of its Draft 2020 UWMP, SDCWA completed a Delta Reliance analysis to evaluate reduced Delta reliance consistent with Appendix C in the California Department of Water Resources, {DWR) Final UWMP Guidebook 2020 {DWR Guidebook). Given that Poway1s only potential source of water from the Delta watershed is water purchased from SDCWA, the City relies on SDCWNs Delta reliance analysis to also demonstrate reduced regional reliance on the Delta. SDCWA Reduced Reliance on Delta Watershed SDCWNs Draft 2020 UWMP documents consistency with WR Pl by quantifying the water supplies that contribute to regional self-reliance and demonstrating reduced reliance on the Delta watershed, as summarized below. Quantification of Water Supplies that Contribute to Regional Self-Reliance Water suppliers must report the expected outcome for measurable improvement in regional self-reliance as a reduction in water used from the Delta watershed. Table 1 lists the sources of water supplies and volumes that contribute to regional self-reliance.3 As shown in the table, SDCWNs reliance on the Delta watershed, and consequently Poway1s reliance on the Delta watershed, decreases over time as the percent of water supplies that contribute to regional self-reliance increase over time. Poway1s individual supplies that contribute to regional self-reliance can be found in Chapter 5: System Water Supplies of the City1s 2015 UWMP and 2020 UWMPs. Table 1-Calculation of Supplies Contributing to Regional Self-Reliance Baseline 2045 Water Supplies Contrlbutinc to Recional Self-Reliance (Acre•Fttt) (2010) 2015 2020 2025 2030 2035 2040 (opt) Water Use Efficiency 79,960 6,737 74,141 62,411 66,921 73,035 81,625 85,698 Water Recycling 33,668 38,660 40,459 42,993 46,493 46,593 46,693 46,793 Stormwater Capture and Use Advanced Water Technologies 56,000 56,000 56,000 56,000 56,000 56,000 Conjunctive Use Projects Local and Regional Water Supply and Storage Projects 235,924 250,436 355,120 402,599 423,959 484,021 480,521 480,521 Other Pro9:rams and Projects the Contribute to Regional Self-Reliance Water Supplies Contributing to Regional Self-Reliance 349,552 295,833 525,720 564,003 593,373 659,649 664,839 669,012 Service Area Water Demands without Water Use Efficiency Baseline 2045 (2010) 2015 2020 2025 2030 2035 2.040 (opt) Service Area Water Demands without Water Use Efficiency 795.410 654,022 661,722 618.169 645,165 671,509 695,860 716,469 Baseline 2.045 Chance in Recional Self Reliance (Acre-Feet) (2010) 2015 2.020 2025 2030 2035 2.040 (opt) Water Supplies Contributing to Re11:ional Self-Reliance 349,552 295,833 525,720 564,003 593,373 659,649 664,839 669,012 Change in Water Supplies Contributing to Regional Self-Reliance (53,719) 176,168 214.451 243,821 310.097 315.287 319,460 Chance in Percentace Recional Self Reliance Baseline 2045 (As a Percent of Water Demand without WUE) (2010) 2015 2020 2025 2030 2035 2040 (opt) Percentage of Water Supplies Contributing to Regional Self-Reliance 43.9'¾ 45.2% 79.4% 91.2% 92.0% 98.2% 95.5% 93.4'¾ Chan Re in Percenta,re of Water Supplies Ccntributinl,l to Rel,lional Self-Reliance 102.9% 180.8% 207.6% 209.3% 223.5% 217.4% 212.S~f Demonstration of Reduced Reliance on Water Supplies from the Delta Watershed Water suppliers are required to report on the expected outcomes for measurable reductions in water supplies from the Delta watershed. For Poway, the only potential source of water from the Delta watershed is water purchased from SDCWA via MWD. Because water provided by MWD to SDCWA can include supplies that commingle Delta watershed and CVP supplies, SDCWA {and therefore Poway) must wholesale incorporate the MWD1s forecast as a reasonable methodology 3 Draft 2020 UWMP, San Diego County Water Authority, March 2021, Appendix J, Table 2. 20 of 21 June 1, 2021, Item #11to forecast the percent of MWD water supply from the Delta watershed and the CVP, at least until MWD provides the methodology approved by the DSC as anticipated. To serve as placeholder for this requirement, Table 2 calculates the reduced reliance on the Delta watershed within the entirety of the MWD service area. 4 Table 2 -Calculation of Reliance on Water Supplies from Delta Watershed 5 Baseline Water Supplies from th• D1lta Wat1rsh1d (Acr1-F11t) (2010) 2015 2020 2025 2030 2035 2040 2045 (opt) CVP/SWP Contract Supplies 1,472,000 1,029,000 984,000 1,108,670 1,108,670 1,108,670 993,980 993,980 Delta/Delta Tributary Diversions Transfers and Exchanges 20,000 44,000 91,000 8,000 8,000 8,000 8,000 8,000 Other Water Supplies from the Delta Watershed Total Water Supplies from the Delta Watershed 1,492,000 1,073,000 1,075,000 1,116,670 1,116,670 1,116,670 1,001,980 1,001,980 I Bas1lin1 Service Area Water Demands without Water Use Efficiency (2010) 2015 2020 2025 2030 2035 2040 2045 (opt) I service Area Water Demands without Water Use Efficiency Savings 5,493,000 5,499,000 5,219,000 4,598,000 4,737,000 4,877,000 4,981,000 5,100,000 Chance in Supplies from the D1lta Watershed (Acre-Feet) Baseline (2010) 2015 2020 2025 2030 2035 2040 2045 (opt) Total Water Supplies from the Delta Watershed 1,492,000 1,073,000 1,075,000 1.116,670 1,116,670 1,116,670 1,001,980 1,001,980 Change in Water Supplies from the Delta Watershed (419,000) (417,000) (375,330) (375,330) (375,330) (490,020) (490,020) Chane• In Percentace of Supplies from th1 Delta Watershed Baseline (As a Percent of Water Demand w/out WUE) (2010) 2015 2020 2025 2030 2035 2040 2045 (opt) Percentage of Total Water Supplies from the Delta Watershed 27.2% 19.5% 20.6% 24.3% 23.6% 22.9% 20.1% 19.6% Change in Percentage of Water Supplies from the Delta Watershed -7.6% -6.6% -2.9% -3.6% -4.3% -7.0% -7.5% The CVP/SWP contract supplies in Table 2 include MWD's SWP Table A and Article 21 supplies.6 The values in Table 2 do not include supplies from San Luis Carryover storage or Central Valley storage programs. The transfers and exchanges of supplies from the Delta watershed shown in Table 2 include supplies from the San Bernardino Valley MWD Program, Yuba River Accord Purchase Program, the San Gabriel Valley MWD Program, and other generic SWP and Central Valley transfers and exchanges. Additional information can be found in Section 3.2 and Appendix 3 of MWD's Draft 2020UWMP.7 4 Draft 2020 UWMP, Metropolitan Water District of Southern California, February 2021, Appendix 11, Table A.11-3. 5 Metropolitan Water District of Southern California, Draft 2020 UWMP, February 2021, Appendix 11, Table A.11-3. 6 Ibid., p. A.11-7. 7 Ibid., pgs. A.11-7 -11-8. 21 of 21