Norco City Council
June 3, 2026

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Water Code Section 10644
(a)(2) The plan, or amendments to the plan, submitted to the department … shall include any standardized forms, tables, or displays specified by the department.

CHAPTER 2

PLAN PREPARATION
This chapter provides information on the City’s process for developing the 2025 UWMP, including efforts in coordination and outreach with other agencies in the region.

2.1 Basis for Preparing a Plan
The basis for preparing a UWMP is identified in the Water Code:

The City currently serves approximately 7,960 municipal water connections and delivers approximately 6,700 AF of water annually to its customers (Table 2-1). In accordance with the CWC, the City is considered an urban water supplier and is required to prepare an UWMP every five years. This document includes all the requirements of the UWMP and can be read as a stand-alone document. The 2025 UWMP standardized tables from DWR are included in the main body of the document.

The City understands that water is a limited resource and that a long-term reliable supply of water is essential to protect the local and state economy. The City also recognizes that, while conservation and efficient use of water is a statewide concern, planning is best done at the local level. The 2025 UWMP contains planning information to assist the City in developing a reliable supply of quality water in sufficient quantities for beneficial uses.

2.1.1 Public Water Systems
Water Code Section 10617
“Urban water supplier” means a supplier, either publicly or privately owned, providing water for municipal purposes either directly or indirectly to more than 3,000 customers or supplying more than 3,000 acre-feet of water annually. An urban water supplier includes a supplier or contractor for water, regardless of the basis of right, which distributes or sells for ultimate resale to customers.

This part applies only to water supplied from public water systems.

Water Code Section 10620
Every person that becomes an urban water supplier shall adopt an urban water management plan within one year after it has become an urban water supplier.

Water Code Section 10621
(a) Each urban water supplier shall update its plan at least once every five years on or before July 1, in years ending in six and one, incorporating updated and new information from the five years preceding each update.

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The City is a public water system (PWS) in accordance with the CWC and the California Health and Safety Code. The service area of the City (i.e., city boundaries) is served by one PWS, as reported in Table 2-1.

Table 2-1: Public Water Systems

2.2 Individual Planning and Compliance
The City prepared this 2025 UWMP as an individual retailer to report data solely within its service area (Table 2-2). The City coordinates with other water supply agencies in the region regarding water supply reliability and groundwater management activities and recycled water generated from the WRCRWA wastewater treatment facility, described in further detail in Section 2.4. Individual UWMPs address all requirements of the Water Code including water use targets and baselines for Senate Bill Extraordinary Session 7-7 (SB X7-7) Water Conservation Act of 2009 reporting. The City notifies and coordinates with all appropriate regional agencies and constituents.

California Health and Safety Code 116275
(h) “Public Water System” means a system for the provision of water for human consumption through pipes or other constructed conveyances that has 15 or more service connections or regularly serves at least 25 individuals daily at least 60 days out of the year.

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Water Code Section 10620
(d)(1) An urban water supplier may satisfy the requirements of this part by participation in area wide, regional, watershed, or basin wide urban water management planning where those plans will reduce preparation costs and contribute to the achievement of conservation, efficient water use, and improved local drought resilience.

2.2.1 Regional UWMP
The City has prepared this UWMP as an individual retailer, but continues to coordinate with adjacent agencies on regional water management planning.

2.2.2 Regional Alliance
Water Code Section 10608.20
(a)(1)…Urban retail water suppliers may elect to determine and report progress toward achieving these targets on an individual or regional basis as provided in subdivision (a) of Section 10608.28… Water Code Section 10608.28
(a) An urban retail water supplier may meet its urban water use target within its retail service area, or through mutual agreement by any of the following:
(1) Through an urban wholesale water supplier.
(2) Through a regional agency authorized to plan and implement water conservation, including, but not limited to, an agency established under the Bay Area Water Supply and Conservation Agency Act (Division 31 (commencing with Section 81300)). (3) Through a regional water management group as defined in Section 10537. (4) By an integrated regional water management funding area. (5) By hydrologic region.
(6) Through other appropriate geographic scales for which computation methods have been developed by the department.
(b) A regional water management group, with the written consent of its member agencies, may undertake any or all planning, reporting, and implementation functions under this chapter for the member agencies that consent to those activities. Any data or reports shall provide information both for the regional water management group and separately for each consenting urban retail water supplier and urban wholesale water supplier.

The City of Norco has prepared the 2025 UWMP as an individual UWMP (Table 2-2).

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Water Code Section 1608.20
(a)(1) Urban retail water suppliers…may determine the targets on a fiscal year or calendar year basis.

Table 2-2: Plan Identification Type

2.3 Fiscal or Calendar Year and Units of Measure
The City reports water volumes on a fiscal year (FY) basis consistently throughout the 2025 UWMP (Table 2-3). The City’s fiscal year starts on July 1 and ends on June 30 of the following year. Therefore, 2025 represents the City’s fiscal year from July 1, 2024 to June 30, 2025.

Consistent with fiscal year reporting, the City presented the complete 2025 water supply data in Table 2-1 based on records from July 1, 2024 to June 30, 2025. In terms of the reporting units, the City reports all water volumes in units of AF consistently throughout the 2025 UWMP (Table 2-3).

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Water Code Section 10631
(h) An urban water supplier that relies upon a wholesale agency for a source of water shall provide the wholesale agency with water use projections from that agency for that source of water in five-year increments to 20 years or as far as data is available. The wholesale agency shall provide information to the urban water supplier for inclusion in the urban water supplier’s plan that identifies and quantifies, to the extent practicable, the existing and planned sources of water as required by subdivision (b), available from the wholesale agency to the urban water supplier over the same five-year increments, and during various water-year types in accordance with subdivision (f). An urban water supplier may rely upon water supply information provided by the wholesale agency in fulfilling the plan informational requirements of subdivisions (b) and (f).

Table 2-3: Supplier Identification

2.4 Coordination and Outreach
The City is active in regional strategies related to water supply and groundwater management with Western Municipal Water District (WMWD), the Chino Desalter Authority (CDA), City of Corona, Jurupa Community Services District (JCSD), City of Riverside, and the Chino Basin Watermaster.

2.4.1 Wholesale and Retail Coordination
The City purchases treated groundwater from WMWD’s Arlington Desalter, treated groundwater from the Chino Basin Desalter Authority, treated groundwater from the City of

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Water Code Section 10620
(d)(3) Each urban water supplier shall coordinate the preparation of its plan with other appropriate agencies in the area, including other water suppliers that share a common source, water management agencies, and relevant public agencies, to the extent practicable.

Water Code Section 10642
Each urban water supplier shall encourage the active involvement of diverse social, cultural, and economic elements of the population within the service area prior to and during the preparation of both the plan and the water shortage contingency plan...

Riverside, and treated surface water from the Metropolitan Water District of Southern California (MWD) via WMWD and wheeled through a connection with the City of Corona (Table 2-4).

Table 2-4: Water Supplier Information Exchange

2.4.2 Coordination with Other Agencies and the Community In addition to the water supply planning efforts in the preparation of the UWMP, the City coordinates with other water agencies in the region for water supply planning and identifying local and regional projects that would improve water supply reliability and benefit of the individual groundwater basins. The City’s primary source of water is pumped groundwater (produced locally and regionally). In addition to its local groundwater supply, the City entered into an agreement with WMWD to purchase 4,400 AF of treated groundwater annually to meet its water demands. As a member agency of the Chino Desalter Authority, the City has agreed to purchase 1,000 AF annually of treated groundwater and actively participates in regional management of the authority and Chino Basin. The City owns three groundwater wells located in the Chino Basin that are inactive due to groundwater quality concerns. The City also has an

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agreement with the City of Riverside to provide up to 1,500 gpm through a single intertie as needed.

The City has an agreement to purchase treated surface water from WMWD in emergency situations. The surface water supply agreement is discussed in Chapter 6.

Currently, local groundwater from the Temescal Groundwater Basin contributes about twenty (20) percent of the City’s annual water production. The City works with a number of water agencies in the surrounding area to develop regional solutions for groundwater management. By coordinating with neighboring water agencies, the City ensures that its longterm water supply needs, as outlined in this UWMP, will be incorporated into regional water planning and groundwater management efforts.

2.4.3 Notice to Cities and Counties
The City has sent a notification letter that the 2025 UWMP was under preparation, a copy of the draft 2025 UWMP, and a notice of intention to adopt. The City’s notification to Western Municipal Water District, Chino Desalter Authority, City of Corona, The City of Riverside and Jurupa Community Services District is reported in Chapter 10 (Table 10-1). The notifications that an UWMP update was in progress were sent on March 24, 2026 and a copy of the letters is included in Appendix B.

Water Code Section 10621(b)
Every urban water supplier required to prepare a plan pursuant to this part shall, at least 60 days before the public hearing on the plan required by Section 10642, notify any city or county within which the supplier provides water supplies that the urban water supplier will be reviewing the plan and considering amendments or changes to the plan.

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CHAPTER 3

SYSTEM DESCRIPTION
This chapter provides a general description of the City’s water supply system, including a description of the service area, climate, and projected population.

3.1 General Description
The City of Norco was incorporated in 1964. The City’s water service area is located in the northwestern portion of Riverside County (County) and includes the incorporated City of Norco, California. The City boundaries are adjacent to the neighboring communities of the City of Riverside to the east, the City of Eastvale to the north, and the City of Corona to the south.

The City is the sole water purveyor for the residents and businesses of Norco. The City’s water service area encompasses approximately 15 square miles. The service area is divided by the Interstate 15 Freeway (I-15) which runs north and south through the City. Major local roads include Hamner Avenue, running in a north-south direction, Sixth Street, running in an eastwest direction, and River Road running in a northeast-southwest direction.

The City’s land use is primarily residential (half acre properties), with smaller portions of commercial, industrial, and open space. The City is mostly built out, with a nominal percentage of vacant land. The residential properties that lie within the water service area are zoned primarily residential animal keeping.

The Open Space zoning category includes both irrigated areas, such as parks, and nonirrigated areas, such as preserved natural open space. The City’s General Plan, originally adopted in 1987, and updated as required, provides a more detail description of the land use in the service area.

The City Council consists of five members elected at-large by voters in November of evennumbered years. Each year, the Mayor and Mayor Pro-Tem are chosen by the City Council members. The Mayor presides at Council meetings and acts as the ceremonial head of the Water Code Section 10631
(a) Describe the service area of the supplier, including current and projected population, climate, and other social, economic, and demographic factors affecting the supplier’s water management planning. The projected population estimates shall be based upon data from the state, regional, or local service agency population projections within the service area of the urban water supplier and shall be in five-year increments to 20 years or as far as data is available. The description shall include the current and projected land uses within the existing or anticipated service area affecting the supplier’s water management planning. Urban water suppliers shall coordinate with local or regional land use authorities to determine the most appropriate land use information, including, where appropriate, land use information obtained from local or regional land use authorities, as developed pursuant to Article 5 (commencing with Section 65300) of Chapter 3 of Division 1 of Title 7 of the Government Code.

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City. The Mayor Pro-Tem serves as Mayor in the absence of the Mayor.

3.2 Service Area Boundary Maps
The City’s service area is contiguous with the City boundaries and has undergone relatively small changes since incorporation with the exception of one annexation area north of the Santa Ana River (Silverlakes) totaling approximately 122.0 acres. Figure 3-1 provides the City’s current zoning map.

Figure 3-1 City Zoning Map

3.3 Service Area Climate
The California Water Code includes several references to the impacts of climate on water management planning.

Water Code Section 10631(a)
A plan shall… Describe the service area of the supplier, including … climate… Water Code Section 10630.

It is the intention of the Legislature, in enacting this part, to permit levels of water management planning… while accounting for impacts of climate change.

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The climate in the City is typical of Southern California with generally mild temperatures, minimal days below freezing, and approximately 330 days of sunshine per year. The City’s average monthly temperature ranges from 48.3 to 78.2 degrees Fahrenheit (degrees F), with an annual average temperature of 63.25 degrees F. The daily extreme low and high temperatures have been measured to be 22 degrees F and 118 degrees F, respectively. ETo averages a total of 56.37 inches per year.

The City historically has an average annual precipitation of approximately 12.71 inches.

Records show that the monthly precipitation has been as high as 17 inches and as low as 0 inches. Most of the rainfall occurs during the period of November through April. The source of historical precipitation is the California Irrigation Management System (CIMIS) and the Western Regional Climate Center (WRCC).

3.3.1 Climate Change
As recommended in the 2025 UWMP Guidebook, the City evaluated the vulnerabilities to climate change qualitatively as part of this UWMP and completed the IRWM Climate Change Vulnerability Assessment presented in Appendix C. A narrative summary of potential climate change impacts on the City’s water demand and water supply is included in Section 4.5 and Section 6.2.19, respectively. Appendix C includes a narrative summary of identified vulnerabilities of climate change on other categories, including sea level rise, flooding, ecosystem and habitat vulnerability, and hydropower.

3.4 Service Area Population and Demographics
As is expected from nearing build-out conditions, the City’s population growth over the past 5 years has slowed significantly compared to growth seen in previous decades. The City’s population is currently estimated at approximately 25,800 per data received from the United States Census Bureau (Table 3.1).

The City’s 2015 Water Master Plan (WMP) estimated the population served by the City to be approximately 26,800 residents in 2020, with very minor growth estimated since 2015. The California Rehabilitation Center (CRC) has historically housed up to approximately 3,000 inmates (the prison population is included in the City of Norco census). The CRC facility is in the process of closing down and the inmate population has already begun to decrease.

The City has not experienced any significant growth over the last five years. The City population increased approximately 350 people between the 2020 UWMP and 2025 UWMP and the City anticipates similar growth thereafter. The anticipated growth trend can be seen in Table 3-1 Water Code Section 10631(a)
Describe the service area of the supplier, including current and projected population …The projected population estimates shall be based upon data from the state, regional, or local service agency population projections within the service area of the urban water supplier and shall be in five-year increments to 20 years or as far as data is available.

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which summarizes future population projections and takes into account a reduction resulting from the closure of the CRC facility. Population projections are shown from 2025 through 2050.

The projected population for 2045 is 28,900, which is approximately 12 percent higher than the current 2025 service area population of 25,800. This yields an average yearly growth rate of

0.6 percent during the planning period. The UWMP utilized United States Census Bureau data for 2025 population projections. For future population projections, Southern California Association of Governments (SCAG) data was utilized. Population projections have been adjusted to account for the closure of the CRC which is underway and has historically had up to 3,000 inmates that were included in population projections.

Table 3-1: Retail Population – Current and Projected

3.4.1 Other Demographic Factors
The City’s residential land use is relatively uniform and consistent with the City’s General Plan and continues to follow the existing trend, with limited additional future residential developments and increased population. Therefore, future water use trends are anticipated to be similar to current trends. Most existing housing units in the City fall under the category of animal keeping single-family residential at densities of 2 units per acre. The majority of new residential development will be built within this density range. Accessory Dwelling Units (ADUs) are being added to some existing properties. Medium-density residential, with 8 to 20 units per acre, exists to a smaller degree within the city. Within new growth areas, single-family residential is planned between single-family neighborhoods and higher density housing, providing a smooth transition between different land uses.

Water Code Section 10631
(a) Describe the service area of the supplier, including… other social, economic and demographic factors affecting the supplier’s water management planning

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3.5 Land Uses within Service Area
The City’s General Plan and Zoning Code continues to follow the existing trend, with additional future residential developments and increased population. There is no anticipated large-scale industrial development within the City. Therefore, future water use trends are anticipated to be similar to current trends.

Water Code Section 10631(a)
The description shall include the current and projected land uses within the existing or anticipated service area affecting the supplier’s water management planning. Urban water suppliers shall coordinate with local or regional land use authorities to determine the most appropriate land use information, including, where appropriate, land use information obtained from local or regional land use authorities…

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CHAPTER 4

WATER USE CHARACTERIZATION
This chapter describes and quantifies the City’s current water use and future water use projections through the year 2050 based on currently available information. Projected water demands assist in determining the design of future water supply facilities. Water use and production records, combined with projections of population and urban development, provide the basis for estimating future water use requirements. This chapter describes the City’s potable water demands, and projects water demands through the year 2050.

New requirements and legislative changes enacted since the 2015 UWMPs were completed.

Both Wholesale and Retail Suppliers will have to conduct an annual water supply and demand assessment on or before July 1 of each year, starting in 2022. The annual assessment will include current year unconstrained demand. Suppliers are encouraged to consider unconstrained demand as the expected water use in the upcoming year, based on recent water use, and before any projected response actions a Supplier may trigger under its Water Shortage Contingency Plan (see Chapter 8). [Water Code Section 10632.1].

4.1 Non-Potable versus Potable and Raw Water Demand
Historically the majority of water demands provided by the City are primarily for residential land uses, with commercial, industrial, and institutional uses comprising approximately 16 percent of total usage in 2025. As of 2025, the City currently maintains approximately 7,960 active water services.

The total supplies for the City over the previous five years averaged 6,587 acre-feet per year (AFY). In FY 2024/2025 the City produced a total of 6,691.3 AF, of which 1,152 AF was produced from local groundwater sources, 1,062 AF was purchased from the Chino Desalter Authority, 822 AF was purchased from the City of Riverside and 3,656 AF was from imported water supplies (WMWD). The water production over the last five years is provided in the table below.

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Retail: Fiscal Year Water Production 2021-2025 - Actual Fiscal Year
Month 2021 2022 2023 2024 2025
July 717.0 742.7 714.4 729.9 739.7
August 779.5 757.1 705.4 668.3 668.8
September 709.7 694.3 674.0 587.1 621.9
October 660.3 618.7 571.9 532.2 606.9
November 533.1 574.0 466.2 498.4 538.7
December 517.9 391.5 384.4 432.2 508.3
January 444.8 450.0 302.5 360.5 482.2
February 403.6 473.7 352.9 290.1 365.2
March 495.9 562.7 290.4 324.6 418.9
April 544.4 571.2 426.5 410.2 512.9
May 643.3 634.0 511.1 541.5 584.6
June 686.2 672.2 557.2 634.6 643.0
TOTAL 7,135.7 7,142.1 5,957.0 6,009.6 6,691.3
Water production is in acre feet.

Between 1990 and 1999, the City’s local groundwater supply met about 90 percent of the overall demand with the remaining 10 percent met by purchased water and imported water.

Since 1999, the City’s local groundwater has accounted for approximately 38 percent of the overall demands with purchased water accounting for the remaining 62 percent of the overall demand. The production numbers vary from year to year depending upon weather conditions and local groundwater quality. Future projections anticipate an increased reliance on regional water supplies as the City has reduced supplies from local groundwater wells due to poor water quality. The City anticipates water demand projections to remain relatively constant, declining initially due to water conservation and the closure of the CRC and then gradually increasing due to normal population growth.

In 2015, the City completed its Water Master Plan (WMP) and Recycled Water Master Plan (RWMP). The City is entitled to treated recycled water from the WRCRWA wastewater treatment facility for recycled purposes. The WRCRWA wastewater treatment facility has a treatment capacity of 14.0 MGD. The City currently discharges about 1.9 mgd to WRCRWA for sewer treatment and can receive a similar amount in recycled water daily in return (minus internal water demands at the plant) for usage as recycled water.

The City has designed and constructed the backbone distribution infrastructure to provide recycled water and currently provides non-potable well water to Lake Norconian. At this time recycled water is not used in the City but the City is evaluating the feasibility of using recycled water for landscape irrigation and there are plans to use recycled to replenish Lake Norconian in the near future.

The City’s plans for existing capacity and future expansion of its recycled water system have been identified in the 2015 RWMP. Based on the demand projections derived in the RWMP,

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the City’s future recycled water system may be expanded to provide future customers with a reliable supply. Future recycled water projects may include golf courses, parks, landscape maintenance districts, schools, dual plumbing, agriculture, and freeway landscaping.

Additionally, the City has established recycled water rates so they are prepared to add customers to their system in the future.

4.2 Past, Current, and Projected Water Use by Sector
The past, present, and future projected water uses by sector are provided in the following Water Code Section 10631(d)(4)
(A) Water use projections, where available, shall display and account for the water savings estimated to result from adopted codes, standards, ordinances, or transportation and land use plans identified by the urban water supplier, as applicable to the service area. (B) To the extent that an urban water supplier reports the information described in subparagraph (A), an urban water supplier shall do both of the following:
(i) Provide citations of the various codes, standards, ordinances, or transportation and land use plans utilized in making the projections.
(ii)Indicate the extent that the water use projections consider savings from codes, standards, ordinances, or transportation and land use plans. Water use projections that do not account for these water savings shall be noted of that fact.

Water Code Section 10635.
(a) Every urban water Supplier shall include, as part of its urban water management plan, an assessment of the reliability of its water service to its customers during normal, dry, and multiple dry water years. This water supply and demand assessment shall compare the total water supply sources available to the water supplier with the long-term total projected water use over the next 20 years, in five-year increments, for a normal water year, a single dry water year, and a drought lasting five consecutive water years. The water service reliability assessment shall be based upon the information compiled pursuant to Section 10631, including available data from state, regional, or local agency population projections within the service area of the urban water supplier.

Water Code Section 10631
(h) An urban water supplier that relies upon a wholesale agency for a source of water shall provide the wholesale agency with water use projections from that agency for that source of water in fiveyear increments to 20 years or as far as data is available… The wholesale agency shall provide information to the urban water supplier for inclusion in the urban water supplier’s plan that identifies and quantifies, to the extent practicable, the existing and planned sources of water as required by subdivision (b), available from the wholesale agency to the urban water supplier over the same five-year increments, and during various water-year types in accordance with subdivision (f). An urban water supplier may rely upon water supply information provided by the wholesale agency in fulfilling the plan informational requirements of subdivisions (b) and (f).

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sections of this report.

4.2.1 Water Use Sectors Listed in Water Code
The City classifies meters within its water service area into the following categories: singlefamily residential (SFR), multi-family residential (MFR), commercial/industrial, institutional/governmental, and landscape (potable water and recycled water accounts). The City does not wholesale water to other agencies.

The City’s historical residential water use comprises the majority of accounts, with single family residential and multi-family residential representing approximately 90 percent of total account distribution. Commercial, institutional and industrial represent approximately 9 percent and landscape irrigation accounts represent the remaining 2 percent of the City’s accounts.

4.2.2 Past Water Use
While not part of the DWR UWMP Reporting Tables, the Water Code requires Retail Suppliers to quantify past water use. The table below summarizes past actual water use by sector for 2020 from the previous UWMP. This data is important for comparison to current and future Water Code Section 10631(d)
(1) For an urban retail water supplier, quantify, to the extent records are available, past and current water use, over the same five-year increments described in subdivision (a), and projected water use, based upon information developed pursuant to subdivision (a), identifying the uses among water use sectors, including, but not necessarily limited to, all of the following:
(A) Single-family residential.
(B) Multifamily.
(C) Commercial.
(D) Industrial.
(E) Institutional and governmental.
(F) Landscape.
(G) Sales to other agencies.
(H) Saline water intrusion barriers, groundwater recharge, or conjunctive use, or any combination thereof.
(I) Agricultural.
(J) Distribution system water loss.

Water Code Section 10631(d)(1)
For an urban retail water supplier, quantify, to the extent records are available, past and current water use, over the same five-year increments described in subdivision (a), and projected water use, based upon information developed pursuant to subdivision (a), identifying the uses among water use sectors, including, but not necessarily limited to, all of the following… (J) Distribution system water loss….

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projections to evaluate water use trends.

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4.2.3 Current Water Use
Current actual water use by sector for 2025 is summarized in Table 4-1.

Table 4-1: Retail: Demands for Potable and Non-Potable Water – Actual

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4.2.4 Projected Water Use
The City’s potable water usage decreased as a result of programs implemented to meet mandatory reduction in per capita water use by 2020. Projected potable water demands are projected to increase gradually over time due to population growth in the service area.

Table 4-2 shows the City water demand projections incorporating the water conservation targets associated with the Water Conservation Act of 2009 (“Water Demand with 20x2020 Conservation”). This represents the demand the City is required to meet based on the mandated water conservation targets assuming the population growth discussed in Chapter 3.

Water Code Section 10635 (a).

Every urban water supplier shall include, as part of its urban water management plan, an assessment of the reliability of its water service to its customers during normal, dry, and multiple dry water years. This water supply and demand assessment shall compare the total water supply sources available to the water supplier with the long-term total projected water use over the next 20 years, in five-year increments, for a normal water year, a single dry water year, and a drought lasting five consecutive water years. The water service reliability assessment shall be based upon the information compiled pursuant to Section 10631, including available data from state, regional, or local agency population projections within the service area of the urban water supplier.

Water Code Section 10631
An urban water supplier that relies upon a wholesale agency for a source of water shall provide the wholesale agency with water use projections from that agency for that source of water in five-year increments to 20 years or as far as data is available… The wholesale agency shall provide information to the urban water supplier for inclusion in the urban water supplier’s plan that identifies and quantifies, to the extent practicable, the existing and planned sources of water as required by subdivision (b), available from the wholesale agency to the urban water supplier over the same fiveyear increments, and during various water-year types in accordance with subdivision (f). An urban water supplier may rely upon water supply information provided by the wholesale agency in fulfilling the plan informational requirements of subdivisions (b) and (f).

Water Code Section 10631(d)(4)
(A) Water use projections, where available, shall display and account for the water savings estimated to result from adopted codes, standards, ordinances, or transportation and land use plans identified by the urban water supplier, as applicable to the service area. (B) To the extent that an urban water supplier reports the information described in subparagraph (A), an urban water supplier shall do both of the following:
(i) Provide citations of the various codes, standards, ordinances, or transportation and land use plans utilized in making the projections.
(ii) Indicate the extent that the water use projections consider savings from codes, standards, ordinances, or transportation and land use plans. Water use projections that do not account for these water savings shall be noted of that fact.

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The actual water demand in 2025 was 6,685 AF, 740 AF lower than the projected demand of 7,425 AF in the 2020 UWMP. The decrease is due to limited growth, continued water conservation efforts, and may reflect the beginning of a reduction in the number of inmates at the CRC.

Overall, the City anticipates minimal growth in residential customers and steady growth in commercial customers. As further discussed in later chapters, the City is committed to ensuring these demands can be met in the future.

Table 4-2: Water Use by Sector – Projected

4.2.5 Future and Passive Water Savings
The water use projections in Table 4-2 do not include future or passive water savings measures due to the limited anticipated future development within the City. Table 4-3 and Table 4-4 below from the DWR guidelines are provided to reflect this.

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Table 4-3: Retail Water Loss Audit Reporting
Table 4-4: Retail Passive Water Savings Projections

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4.3 Distribution System Water Loss
The City does not have any unmetered accounts and is planning to continue installing meters for all future accounts. The City has installed an automated meter reading system (AMI) throughout its entire distribution system (100% of the accounts).

Water system losses were calculated by accounting for metered use, and subtracting production from deliveries. Overall, the annual water loss for 2025 is approximately 17 percent of total water produced by the City. This is higher than losses estimated in the 2020 UWMP.

The City is diligently troubleshooting the water distribution system to determine source of water loss so corrective actions can be taken. The water losses has been trending downward in recent months and is expected to continue to be reduced as the City continues to troubleshoot the system. The City monitors all water production meters and all customer meters within its distribution system. Water production meters are read at each site daily, calculated and checked against the SCADA system, and are calibrated once per year at a minimum. All customer water services are metered and monitored for accuracy using the AMI system. Any customer meter determined to be not functioning are repaired or replaced.

The City of Norco has annually quantified their distribution system losses using the American Water Works Association Method. Latest certification audit can be found in Appendix D. An electronic copy of the annual audit in Excel format is submitted to DWR using DWR’s online submittal tool. The City requires all new multiple unit development projects to submit a water, sewer, and recycled water master plan. Table 4-5 summarizes the annual water loss audit reporting for 2020 through 2024.

Water Code Section 10631(d)(3)
(A) The distribution system water loss shall be quantified for each of the five years preceding the plan update, in accordance with rules adopted pursuant to Section 10608.34. (B) The distribution system water loss quantification shall be reported in accordance with a worksheet approved or developed by the department through a public process. The water loss quantification worksheet shall be based on the water system balance methodology developed by the American Water Works Association.
(C) In the plan due July 1, 2021, and in each update thereafter, data shall be included to show whether the urban retail water supplier met the distribution loss standards enacted by the board pursuant to Section 10608.34.

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Table 4-5: Retail Water Lost Audit Reporting

4.3.1 Progress Toward Meeting the Water Loss Performance Standard Pursuant to Water Code Section 10631 (d)(3)(C), retail suppliers are required to provide data demonstrating whether the State Water Board Water Loss Performance Standard have been met. Although the Water Loss Performance Standard is not required to be met until 2028, data is required to be included in the 2025 UWMP identifying whether or not the standards have been met. Table 4-6 provides the water loss standard data. The City does not currently meet the 2028 standard, but is working diligently to identify the sources of system losses and to take the appropriate measures to reduce losses.

Table 4-6: Progress Towards 2028 Water Loss Standard

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4.4 Water Use for Lower Income Households
The CWC Section 10631.1(a) requires suppliers to estimate projected water use for single family and multifamily residential housing needed for lower income households, as identified in the Housing Element of the General Plan for the service area of the City (City of Norco, 1987).

This does not require quantification of current water use by lower income households. Lower income refers to a household earning less than 80 percent of the annual median income for the area, as adjusted by household size. The 2021 - 2029 Housing Element uses a median household income of $102,817, eighty percent of which is $82,254.

The UWMPA requires that the UWMP identify low-income housing developments within the agency’s service area and develop demand projections for those units. The Housing Element of the City’s General Plan provides information on Regional Housing Needs Allocation Progress (RHNA). The goals, policies, programs and objectives of Norco’s Housing Element is to guide future housing growth to meet the needs of residents of all income levels in Norco.

The City of Norco’s RHNA allocation for the 2021-29 period is 454 housing units, split among very low, low, moderate and above moderate income levels.

As identified in the 2021 – 2029 Housing Element the City of Norco is almost entirely built out, construction of housing will require a new approach to accommodate future growth. The existing residential zones require large minimum lot sizes and low maximum densities, which makes it challenging to achieve the fair-share housing allocation. Infill is likely the best strategy to meet the RHNA allocation.

Water Code Section 10631.1.
(a) The water use projections required by Section 10631 shall include projected water use for single-family and multi-family residential housing needed for lower income households, as defined in Section 50079.5 of the Health and Safety Code, as identified in the housing element of any city, county, or city and county in the service area of the supplier.

California Health and Safety Code Section 50079.5 (a)
“Lower income households” means persons and families whose income does not exceed the qualifying limits for lower income families… In the event the federal standards are discontinued, the department shall, by regulation, establish income limits for lower income households for all geographic areas of the state at 80 percent of area median income, adjusted for family size and revised annually.

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4.5 Climate Change
Changes of hydrology in the Norco area as a result of climate change could lead to changes in water demand, both in quantities and patterns. The completed ESJIRWM Climate Change Vulnerability Assessment is presented in Appendix C. With respect to demand, potential impacts from climate change would result in an increased temperature and evapotranspiration and may result in increased domestic water use.

While the City does not generally provide water to agriculture, there is an animal keeping life style in the City and increased evapotranspiration will increase animal water consumption within the service area.

Water Code Section 10630.

It is the intention of the Legislature, in enacting this part, to permit levels of water management planning commensurate with the numbers of customers served and the volume of water supplied, while accounting for impacts from climate change.

Water Code Section 10635(b)
Every urban water supplier shall include, as part of its urban water management plan, a drought risk assessment for its water service to its customers as part of information considered in developing the demand management measures and water supply projects and programs to be included in the urban water management plan. The urban water supplier may conduct an interim update or updates to this drought risk assessment within the five-year cycle of its urban water management plan update. The drought risk assessment shall include each of the following… (4) Considerations of the historical drought hydrology, plausible changes on projected supplies and demands under climate change conditions, anticipated regulatory changes, and other locally applicable criteria.

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CHAPTER 5
SB X7-7 BASELINES, TARGETS, AND 2020 COMPLIANCE
The Water Conservation Bill of 2009 requires individual retail water suppliers to set water conservation targets for 2015 and 2020 to support the overall state goal of reducing urban potable per capita water use by 20 percent by 2020. Individual supplier conservation targets must be determined using one of four methods that are based upon a baseline of use that is calculated using the specific guidelines described in DWR’s Methodologies for Calculating Baseline and Compliance Urban Per Capita Water Use (DWR,2011).

The City’s baselines and targets were calculated pursuant to the 2025 UWMP Guidebook to be consistent with the fiscal year data used throughout the UWMP and to incorporate 2025 Census data. In the 2025 UWMP, the City confirms its water use targets, demonstrates compliance with its water use target for the year 2020, and shows that the City achieved its 2020 target.

5.1 SB X7-7 Forms and Summary Tables
The City of Norco has updated and verified SB X7-7 forms and tables from their 2020 Urban Water Management Plan.

5.1.1 Use of 2010 Census Data
For the 2025 UWMP, the actual population numbers used are from DOF projections.

GPCD Terminology
When determining water use in a UWMP, two terms are often used interchangeably:

Daily per Capita Water Use The amount of water used per person per day. In the UWMP calculations, this is total water use within a service area, divided by population and is measured in gallons.

Gallons per Capita per Day (GPCD) This is the “Daily per Capita Water Use” measured in gallons. Therefore, the term commonly used when referring to “Daily per Capita Water Use” is “Gallons Per Capita per Day” or “GPCD.”
It is important to distinguish GPCD (as used in UWMPs) from the Residential GPCD (R-GPCD) that is used in some reporting to the State Water Board GPCD is the total water use from all sectors within a service area (residential, commercial, institutional, and any others) minus allowable exclusions, then divided by the population. This is used in UWMPs.

R-GPCD is only a part of the GPCD; it is the estimated residential water use in a service area divided by population.

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5.1.2 SB X7-7 Verification Form
The City calculated the data used in the baseline calculations and demonstrated compliance with the water use target by completing the standardized tables of the SB X7-7 Verification Form. The complete SB X7-7 Verification Form is included in Appendix E.

5.2 Baseline and Target Calculations for 2025 UWMP’s
The City of Norco has not had any changes to their service area since the submittal of their 2020 UWMP.

The City describes its 10 to 15-year baseline period calculations and its 5-year baseline calculation in the following sections.

5.3 Methods for Calculating Population and Gross Water Use For the 5-year baseline period, the City used fiscal years 2005 - 2009 in the 2020 UWMP. For the 10-year baseline period, the City used fiscal years 2001 – 2010 in the 2020 UWMP. The baseline values are summarized in the table below.

Water Code Section 10608.12
(b) “Base daily per capita water use” means any of the following:
(1) The urban retail water supplier’s estimate of its average gross water use, reported in gallons per capita per day and calculated over a continuous 10-year period ending no earlier than December 31, 2004, and no later than December 31, 2010. (2) For an urban retail water supplier that meets at least 10 percent of its 2008 measured retail water demand through recycled water that is delivered within the service area of an urban retail water supplier or its urban wholesale water supplier, the urban retail water supplier may extend the calculation described in paragraph (1) up to an additional five years to a maximum of a continuous 15-year period ending no earlier than December 31, 2004, and no later than December 31, 2010.

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Baselines and Targets Summary
Baselines and Targets Summary
Baseline
Period Start Year End Year
Average
Baseline
GPCD*
Confirmed
2020
Target*
10-15
year
2001 2010 336 269
5 Year 2005 2009 361 289
*All values are in Gallons per Capita per Day (GPCD)
NOTES:

5.3.1 Service Area Population
The City’s water service area is contiguous with the City boundaries. In other words, the area used for calculating the service area population is the same as the water service area used in the gross water use calculation. The City’s population underwent a minor change after 2010 with a slight increase in the CRC state prison population. The table below summarizes the population data used in the analysis.

Water Code Section 10608.20(e)
An urban retail water supplier shall include in its urban water management plan due in 2010…the baseline per capita water use…along with the bases for determining those estimates, including references to supporting data. (f) When calculating per capita values for the purposes of this chapter, an urban retail water supplier shall determine population using federal, state, and local population reports and projections.

Water Code Section 10644
(a)(2) The plan…shall include any standardized forms, tables or displays specified by the department.

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SB X7-7: Service Area Population
SB X7-7: Service Area Population
Year Population
10 to 15 Year Baseline Population
Year 1 2001 24,157
Year 2 2002 24,157
Year 3 2003 24,157
Year 4 2004 24,157
Year 5 2005 24,157
Year 6 2006 24,157
Year 7 2007 24,157
Year 8 2008 24,157
Year 9 2009 24,157
Year 10 2010 27,063
Year 11
Year 12
Year 13
Year 14
Year 15
5 Year Baseline Population
Year 1 2005 24,157
Year 2 2006 24,157
Year 3 2007 24,157
Year 4 2008 24,157
Year 5 2009 24,157
NOTES:

Since the City’s water service area is identical to the City boundary, population estimates were taken directly from DOF tables, except for the two Census years of 2000 and 2010.

There are four allowable methods for calculating water use targets. • Method 1: 80% baseline daily per capita use (GPCD)
• Method 2: Performance Standards
• Method 3: 95% of the DWR hydrologic region per capita use target • Method 4: Applying savings by water sector
The City chose to use Method 1 for calculating its water use target in the 2015 UWMP using DOF population estimates tied to U.S. Census benchmarks, data by fiscal year, and a 10- year baseline period. The 2020 target water use is calculated as 80 percent of the baseline GPCD water use for the 10-year period from 2001 – 2010. The result of the target analysis is presented in the table above as the “Confirmed 2020 Target” of 269 GPCD.

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5.3.2 Gross Water Use
Data to determine the gross water use for each year within the 5 and 10-year baseline periods were provided by the City. The gross water use was calculated using DWR’s Methodology 4 and was based on the City’s metered groundwater and purchased water production (beginning in FY 2003). The City maintains approximately 14.15 million gallons of operational storage in the distribution system as of FY 2025. Furthermore, there are no considerable deliveries for agricultural or process water use; therefore, no deductions for these water uses are necessary.

Gross water use is therefore equivalent to the amount of water entering the distribution system.

For recalculating the baseline and target per capita water use, gross water use was reported for each fiscal year in the 10-year baseline, 5-year baseline, and FY 2015. The City has been purchasing treated groundwater supplied from the Arlington Desalter and the Chino Basin Desalter Authority since 2001.

5.3.3 Gross Water Tables
The City completed the gross water tables in the SB X7-7 Verification Form. These tables are included in Appendix E and were submitted to DWR along with the 2020 UWMP. The table below summarizes the gross water data in the SB X7-7 Verification Form, in units of AF.

Water Code Section 10608.12
(h) “Gross Water Use” means the total volume of water, whether treated or untreated, entering the distribution system of an urban retail water supplier, excluding all of the following:
(1) Recycled water that is delivered within the service area of an urban retail water supplier or its urban wholesale water supplier
(2) The net volume of water that the urban retail water supplier places into long term storage (3) The volume of water the urban retail water supplier conveys for use by another urban water supplier
(4) The volume of water delivered for agricultural use, except as otherwise provided in subdivision (f) of Section 10608.24.

California Code of Regulations Title 23 Division 2 Chapter 5.1 Article 1 Section 596 (a) An urban retail water supplier that has a substantial percentage of industrial water use in its service area is eligible to exclude the process water use of existing industrial water customers from the calculation of its gross water use to avoid a disproportionate burden on another customer sector.

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SB X7-7: Gallons Per Capita Per Day (GPCD)
SB X7-7: Baseline Gallons Per Capita Per Day (GPCD)
Baseline Year
Fm SB X7-7 Table 3
Service Area
Population
Fm SB X7-7
Table 3
Annual Gross
Water Use
Fm SB X7-7
Table 4
Daily Per
Capita Water
Use (GPCD)
10 to 15 Year Baseline GPCD
Year 1 2001 24,157 7,568 280
Year 2 2002 24,157 8,419 311
Year 3 2003 24,157 8,618 319
Year 4 2004 24,157 9,669 357
Year 5 2005 24,157 9,472 350
Year 6 2006 24,157 9,322 345
Year 7 2007 24,157 10,488 388
Year 8 2008 24,157 9,948 368
Year 9 2009 24,157 9,621 356
Year 10 2010 27,063 8,627 285
Year 11 0 - -
Year 12 0 - -
Year 13 0 - -
Year 14 0 - -
Year 15 0 - -
10-15 Year Average Baseline GPCD 336
5 Year Baseline GPCD
Baseline Year
Fm SB X7-7 Table 3
Service Area
Population
Fm SB X7-7
Table 3
Gross Water Use
Fm SB X7-7
Table 4
Daily Per
Capita Water
Use
Year 1 2005 24,157 9,472 350
Year 2 2006 24,157 9,322 345
Year 3 2007 24,157 10,488 388
Year 4 2008 24,157 9,948 368
Year 5 2009 24,157 9,621 356
5 Year Average Baseline GPCD 361
NOTES:

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5.4 2020 Compliance Daily Per-Capita Water Use (GPCD)
Table 5-1 provides the SB X7-7 2020 target progress and demonstrates that the City met their water conservation goals.

Table 5-1 SB X7-7 2020 Target Progress
Water Code Section 10608.12
(f) “Compliance daily per-capita water use” means the gross water use during the final year of the reporting period…
Water Code Section 10608.20
(e) An urban retail water supplier shall include in its urban water management plan due in 2010 . . . compliance daily per capita water use, along with the bases for determining those estimates, including references to supporting data.

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5.4.1 2020 Adjustments for Factors Outside of Supplier’s Control The City of Norco has not experienced any extraordinary events, such as fire suppression, that substantially increased a supplier’s compliance year institutional water use and extraordinary events did not occur on a regular basis either in the baseline or compliance reporting years.

There were no unforeseen weather conditions that required additional water usage within the distribution system during the reporting periods.

5.4.2 If Supplier Does Not Meet 2020 Target

5.5 Regional Alliance
The City of Norco has elected to determine and report baselines, targets, and compliance on an individual basis.

Water Code Section 10608.24
(d)(1) When determining compliance daily per capita water use, an urban retail water supplier may consider the following factors:
(A) Differences in evapotranspiration and rainfall in the baseline period compared to the compliance reporting period.
(B) Substantial changes to commercial or industrial water use resulting from increased business output and economic development that have occurred during the reporting period. (C) Substantial changes to institutional water use resulting from fire suppression services or other extraordinary events, or from new or expanded operations, that have occurred during the reporting period.
(2) If the urban retail water supplier elects to adjust its estimate of compliance daily per capita water use due to one or more of the factors described in paragraph (1), it shall provide the basis for, and data supporting, the adjustment in the report required by Section 10608.40.

Water Code Section 10608.56
(a) On and after July 1, 2016, an urban retail water supplier is not eligible for a water grant or loan awarded or administered by the state unless the supplier complies with this part.

Two exceptions to this are allowed.

Section 10608.56 (c) states that a water supplier shall be eligible for a water loan or grant if it “has submitted to the department for approval a schedule, financing plan, and budget, to be included in the grant or loan agreement, for achieving the per capita reductions.” Section 10608.56 (e) states that a water supplier can also be eligible for a water loan or grant if it “has submitted to the department for approval documentation demonstrating that its entire service area qualifies as a disadvantaged community.”

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CHAPTER 6

WATER SUPPLY CHARACTERIZATION

6.1 Water Supply Analysis Overview
The City is a member agency of the Chino Desalter Authority (CDA), a Joint Powers of Authority; with an annual obligation to purchase 1,000 AFY of reverse osmosis treated potable groundwater. In addition, the City entered into a purchase water agreement with WMWD to purchase a minimum of 4,400 AFY of treated groundwater annually from the Arlington Desalter reverse-osmosis treatment facility. The City of Norco has entered into an agreement with the City of Riverside to purchase approximately 1,500 gpm of potable drinking water on an asneeded basis.

The City's imported water is supplied by MWD and purchased through WMWD, a member agency of MWD. The City’s imported water supply consists of treated water supplied via the Mills Pipeline from MWD’s Henry J. Mills filtration plant to the City of Corona, then wheeled through a metered connection to the City of Norco.

California Water Code (Water Code) Section 10631(b)
Identify and quantify, to the extent practicable, the existing and planned sources of water available to the supplier [in five-year increments to 20 years or as far as data is available] providing supporting and related information, including all of the following:
(1) A detailed discussion of anticipated supply availability under a normal water year, single dry year, and droughts lasting at least five years, as well as more frequent and severe periods of drought, as described in the drought risk assessment. For each source of water supply, consider any information pertinent to the reliability analysis conducted pursuant to Section 10635, including changes in supply due to climate change.
(2) When multiple sources of water supply are identified, a description of the management of each supply in correlation with the other identified supplies. (3) For any planned sources of water supply, a description of the measures that are being undertaken to acquire and develop those water supplies.

Water Code Section 10631 (h)
An urban water supplier that relies upon a wholesale agency for a source of water shall provide the wholesale agency with water use projections from that agency for that source of water in five-year increments to 20 years or as far as data is available. The wholesale agency shall provide information to the urban water supplier for inclusion in the urban water supplier’s plan that identifies and quantifies, to the extent practicable, the existing and planned sources of water as required by subdivision (b), available from the wholesale agency to the urban water supplier over the same fiveyear increments, and during various water-year types in accordance with subdivision (f). An urban water supplier may rely upon water supply information provided by the wholesale agency in fulfilling the plan informational requirements of subdivisions (b) and (f).

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CWC 10631
(b) If groundwater is identified as an existing or planned source of water available to the supplier, all of the following information shall be included in the plan: (2) A description of any groundwater basin or basins from which the urban water supplier pumps groundwater.

6.2 Water Supply Characterization
The City’s service area and distribution system overlies the Temescal Groundwater Basin, with a small portion of the service area overlying the southern end of the Chino Groundwater Basin.

The Chino Groundwater Basin is an adjudicated basin, managed by the Chino Basin Watermaster. The City is a member of the Appropriative Pool in the Chino Basin. The majority of the City’s groundwater supplies are pumped from the Temescal and Chino groundwater basins. The City has four (4) groundwater wells located in the Temescal basin that provide water directly to the water distribution system. Three (3) of these wells have become inactive over the last five years due to water quality concerns. The City owns three (3) inactive groundwater wells located in the Chino groundwater basin.

Water purchased by the City from the Chino Desalter Authority is extracted from the Chino groundwater basin. Water purchased by the City from the Arlington Desalter is extracted from the Arlington groundwater basin. The majority of the water purchased from the City of Riverside originates from the Raymond groundwater basin.

The City has designed and constructed an iron, manganese and arsenic treatment removal facility to increase the production of local groundwater water relative to imported water. The City has been committed to utilizing local groundwater sources to meet current and expected future water demands.

6.2.1 Basin Description
The Temescal basin encompasses an area of approximately 26 square miles bounded by the Santa Ana River, La Sierra Hills, El Sobrante Hills and the Santa Ana Mountains. Typical depths for the City’s wells in the Temescal basin range from 180 to 1,100 feet. Groundwater quality of these wells typically does not meet the EPA and Division of Drinking Water (DDW) maximum contaminant levels (MCL) for fluoride (2 mg/L), arsenic, and secondary standards for iron and manganese.

The Chino Basin is one of the largest groundwater basins in Southern California containing approximately 5,000,000 AF of water and has an unused storage capacity of approximately 1,000,000 AF. The Chino Basin consists of approximately 235 square miles of the upper Santa Ana River watershed and lies within portions of San Bernardino, Riverside, and Los Angeles counties. Approximately 5% of the Chino Basin is located in Los Angeles County, 15% in Riverside County, and 80% in San Bernardino County. The Chino Basin is bounded by Cucamonga Basin and the San Gabriel Mountains to the north, the Temescal Basin to the south, Chino Hills and Puente Hills to the southwest, San Jose Hills, Pomona and Claremont Basins on the northwest and the Rialto/Colton Basins on the east. The legal boundaries of the

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Chino Basin are defined in the Judgment as described in Section 6.2.2.

6.2.2 Groundwater Management
On January 2, 1975, several Chino Basin producers filed suit in California State Superior Court for San Bernardino County (the "Court") to settle the problem of allocating water rights in the Chino Basin. On January 27, 1978, the Court entered a judgment establishing "Chino Basin Municipal Water District v. City of Chino et. al." how water rights would be managed within the Chino Basin and establishing a Watermaster to administer the (the "Judgment"). The Watermaster is a Court created entity established pursuant to the Judgment. The Judgment adjudicated all groundwater rights in Chino Basin and contains a physical solution to meet the requirements of water users having rights in or dependent upon the Chino Basin. The judgment Water Code Section 10631(b)(4)
If groundwater is identified as an existing or planned source of water available to the supplier, all of the following information:
(A) The current version of any groundwater sustainability plan or alternative adopted pursuant to Part 2.74 (commencing with Section 10720), any groundwater management plan adopted by the urban water supplier, including plans adopted pursuant to Part 2.75 (commencing with Section 10750), or any other specific authorization for groundwater management for basins underlying the urban water supplier’s service area. (B) A description of any groundwater basin or basins from which the urban water supplier pumps groundwater. For basins that a court or the board has adjudicated the rights to pump groundwater, a copy of the order or decree adopted by the court or the board and a description of the amount of groundwater the urban water supplier has the legal right to pump under the order or decree. For a basin that has not been adjudicated, information as to whether the department has identified the basin as a high- or medium-priority basin in the most current official departmental bulletin that characterizes the condition of the groundwater basin, and a detailed description of the efforts being undertaken by the urban water supplier to coordinate with groundwater sustainability agencies or groundwater management agencies listed in subdivision (c) of Section 10723 to maintain or achieve sustainable groundwater conditions in accordance with a groundwater sustainability plan or alternative adopted pursuant to Part 2.74 (commencing with Section 10720). (C) A detailed description and analysis of the location, amount, and sufficiency of groundwater pumped by the urban water supplier for the past five years. The description and analysis shall be based on information that is reasonably available, including, but not limited to, historic use records.
(D) A detailed description and analysis of the amount and location of groundwater that is projected to be pumped by the urban water supplier. The description and analysis shall be based on information that is reasonably available, including, but not limited to, historic use records.

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Water Code Section 10631
(b)(2) For basins that have not been adjudicated, (provide) information as to whether the department has identified the basin or basins as overdrafted or has projected that the basin will become overdrafted if present management conditions continue, in the most current official departmental bulletin that characterizes the condition of the groundwater basin, and a detailed description of the efforts being undertaken by the urban water supplier to eliminate the longterm overdraft condition. also appointed the Watermaster to account for and implement the management planning associated with the Chino Basin. The Judgment declared that the initial operating safe yield of the Chino Basin is 145,000 AFY, which is allocated (i) 82,800 AFY to the Agricultural Pool, (ii) 7,366 AFY to the Non-Agricultural Pool, and (iii) 54,834 AFY to the Appropriative Pool.

The Temescal Groundwater Basin is not currently adjudicated. There are three public agencies, the City of Corona, Home Gardens County Water District, and the City of Norco that have historically extracted water from the basin. The agencies have agreed to develop a basin water resources management plan.

The City of Norco has an agreement with Western Municipal Water District to purchase brackish groundwater extracted from the Arlington groundwater basin and treated at the Arlington desalter. Western Municipal Water District completed the Arlington Groundwater Management Plan and also prepared a 2015 Drought Allocation Plan (DAP), which includes the City of Norco as a member agency.

6.2.3 Overdraft Conditions
The City of Corona completed a Groundwater Management Plan (GWMP) that the City of Norco has reviewed. The report indicates that overdraft conditions may have occurred in the Temescal basin during the last 3 years of the 1990 to 2004 period as pumping increased from about 10,000 AFY to almost 20,000 AFY. The City will continue to rely on the groundwater basin for a substantial amount of its local groundwater water supply. The City has identified numerous strategies for managing groundwater while maintaining groundwater production. The City of Corona GWMP concluded that, assuming no other significant changes in the water extraction amount, average pumping totals of about 12,000 AFY in Temescal basin would result in no significant loss of groundwater storage. The City may shift a portion of its local groundwater production/extraction from the Temescal groundwater basin to the Chino groundwater basin.

6.2.4 Historical Groundwater Pumping
Water Code Section 10631
(b) ...If groundwater is identified as an existing or planned source of water available to the supplier, all of the following information shall be included in the plan: (3) A detailed description and analysis of the location, amount, and sufficiency of groundwater pumped by the urban water supplier for the past five years. The description and analysis shall be based on information that is reasonably available, including, but not limited to, historic use records.

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The groundwater basins underlying the City have undergone significant changes since groundwater development began in the early 1900s. Since that time, the groundwater basins have supported a variety of uses including extensive agricultural irrigation, and increasing urban use. Early agricultural activities in the basin were supplemented by diversions of surface water imported into the basin. Agricultural reliance on groundwater increased through the 1940s and 1950s, peaking in the early 1960s but continuing into the 1970s. Increasing urban use has replaced most of that early agricultural demand.

Groundwater pumping has varied over time. In the late 1940s, the total amount of groundwater pumping in the basin was about 20,000 AFY. That amount increased to between 25,000 AFY and 32,000 AFY from the late 1950s to the mid-1970s. Total groundwater pumping decreased to below 20,000 AFY in the 1980s and early 1990s due to a decrease in agricultural irrigation, but has increased to about 25,000 AFY in recent years due to municipal pumping. The majority of the groundwater extraction within the Temescal basin was from the cities of Norco and Corona. Total production exceeded 15,000 AFY in Temescal basin from 1951 to 1978 in support of agricultural irrigation with peak production occurring from 1959 through 1964.

Production declined to below 10,000 AFY by 1979 and averaged about 9,419 AFY over the next 17 years (1979-1996). During this time, agricultural pumping had significantly declined, but municipal pumping had not yet increased. Since 2002, pumping exceeded 20,000 AFY for the first time since the 1960s. Table 6-1 summarizes the groundwater pumping supplies to the City of Norco over the last five years.

Table 6-1 Groundwater Volume Pumped

6.2.5 Surface Water
The City does not treat surface water and does not have any local surface water sources.

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Water Code Section 10633
The plan shall provide, to the extent available, information on recycled water and its potential for use as a water source in the service area of the urban water supplier. The preparation of the plan shall be coordinated with local water, wastewater, groundwater, and planning agencies that operate within the supplier’s service area, and shall include all of the following:
(a) A description of the wastewater collection and treatment systems in the supplier’s service area, including a quantification of the amount of wastewater collected and treated and the methods of wastewater disposal. (b) A description of the quantity of treated wastewater that meets recycled water standards, is being discharged, and is otherwise available for use in a recycled water project.
(c) A description of the recycled water currently being used in the supplier’s service area, including, but not limited to, the type, place, and quantity of use. (d) A description and quantification of the potential uses of recycled water, including, but not limited to, agricultural irrigation, landscape irrigation, wildlife habitat enhancement, wetlands, industrial reuse, groundwater recharge, indirect potable reuse, and other appropriate uses, and a determination with regard to the technical and economic feasibility of serving those uses.
(e) The projected use of recycled water within the supplier’s service area at the end of 5, 10, 15, and 20 years, and a description of the actual use of recycled water in comparison to uses previously projected pursuant to this subdivision. (f) A description of actions, including financial incentives, which may be taken to encourage the use of recycled water, and the projected results of these actions in terms of acre-feet of recycled water used per year.
(g) A plan for optimizing the use of recycled water in the supplier’s service area, including actions to facilitate the installation of dual distribution systems, to promote recirculating uses, to facilitate the increased use of treated wastewater that meets recycled water standards, and to overcome any obstacles to achieving that increased use.

6.2.6 Stormwater
The Temescal basin receives runoff and recharge from almost 14,000 acres of uplands in the adjacent Santa Ana Mountains. Watersheds contributing runoff from the east are almost as large, but contribute less runoff because of lower elevations and corresponding precipitation.

The City of Norco does not currently provide direct storm water recharge into the Temescal basin.

6.2.7 Wastewater and Recycled Water
The City is a member agency of the Western Riverside County Regional Wastewater Authority (WRCRWA), a Joint Powers Authority (JPA). WRCRWA owns and operates a wastewater

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Water Code Section 10633
The plan shall provide, to the extent available, information on recycled water and its potential for use as a water source in the service area of the urban water supplier. The preparation of the plan shall be coordinated with local water, wastewater, groundwater, and planning agencies that operate within the supplier’s service area… conveyance, treatment and disposal system. There are five (5) agencies having the right to discharge to the WRCRWA treatment facility and collection system. The Member Agencies are the Home Gardens Sanitary District, the Jurupa Community Services District, Western Municipal Water District, the City of Corona, and the City of Norco.

Each member agency has the right to utilize their discharge capacity to the WRCRWA plant for recycled water use. The City owns 19 percent of the total treatment capacity, or 2.7 million gallons per day. The City also owns 100,000 GPD of sanitary sewer collection capacity and wastewater treatment capacity in the City of Corona wastewater system.

The City owns and operates a sanitary sewer collection system that includes twelve (12) wastewater lift stations and approximately 106 miles of pipeline.

The City designed and constructed the primary infrastructure for a recycled water distribution system in 2007 with the intent to deliver recycled water to all municipal facilities. The City’s recycled water distribution system currently consists of approximately 8 miles of pipeline with a storage reservoir, two booster pump stations, and two pressure reducing stations. The City completed their Recycled Water Master Plan in 2016.

Although the City has constructed the backbone infrastructure to provide recycled water, the City currently does not provide recycled water because there is insufficient customer demand for recycled water to properly finance and support the operation of a recycled water system. The City is currently re-evaluating other options on how to use its available allocation of recycled water from WRCRWA.

6.2.8 Recycled Water Coordination
The City of Norco and the City of Corona are discussing options that would allow Norco to provide recycled water to Corona’s recycled system. The City as a member agency of WRCRWA assists with the coordination and planning for regional beneficial uses of recycled water. The City is also pursuing other options or markets for its recycled water, including groundwater recharge in the Chino Basin.

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Water Code Section 10633(a)
A description of the wastewater collection and treatment systems in the supplier’s service area, including a quantification of the amount of wastewater collected and treated and the methods of wastewater disposal.

6.2.9 Wastewater Collection, Treatment, and Disposal
The City owns and operates a sanitary sewer collection system that includes twelve (12) lift stations and approximately 106 miles of pipeline.

The City is a member agency of the WRCRWA which owns and operates a wastewater conveyance, tertiary treatment and disposal system. The City also owns 100,000 GPD of sanitary sewer collection and wastewater treatment capacity in the City of Corona system.

The City discharges a waste stream of approximately 1.9 million gallons per day (mgd) to the WRCRWA for treatment. The City is entitled to approximately 2.0 mgd of tertiary treated, disinfected recycled water. WRCRWA has been successful in petitioning to remove the effluent discharge from the Santa Ana River for use as recycled water by the member agencies.

However, WRCRWA has not discharged recycled water in 2025. Table 6-2 identifies the amount of wastewater collected within the City of Norco and Table 6-3 indicates that no wastewater is treated or disposed of within the City.

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Table 6-2 Retail: Wastewater Collected within Service Area Table 6-3 Retail: Wastewater Treatment and Discharge within the Service Area 2020

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Water Code Section 10633 (c)
A description of the recycled water currently being used in the supplier’s service area, including, but not limited to, the type, place, and quantity of use.

Water Code Section 10633
(b) A description of the quantity of treated wastewater that meets recycled water standards, is being discharged, and is otherwise available for use in a recycled water project. (d) A description and quantification of the potential uses of recycled water, including, but not limited to, agricultural irrigation, landscape irrigation, wildlife habitat enhancement, wetlands, industrial reuse, groundwater recharge, indirect potable reuse, and other appropriate uses, and a determination with regard to the technical and economic feasibility of serving those uses.
(e) The projected use of recycled water within the supplier’s service area at the end of 5, 10, 15, and 20 years, and a description of the actual use of recycled water in comparison to uses previously projected pursuant to this subdivision.

6.2.10 Recycled Water System
The City’s recycled water distribution system currently consists of approximately 8 miles of pipeline with a storage reservoir, two booster pump stations, and two pressure reducing stations. Although recycled water is not yet discharged for use from the WRCRWA plant, the City is using a non-potable well as a source of water to replenish Lake Norconian.

6.2.11 Potential, Current, and Projected Recycled Water Uses The City has completed their recycled water master plan and market assessment to determine future recycled water demands and identify areas of the City that may benefit economically from recycled water service. T he City initially determined there are insufficient users for recycled water to financially support the operation of a recycled water system, but is in the process of re-evaluating the potential for recycled water use. Norco is also currently evaluating options to provide its allocation of recycled water from WRCRWA to other member agencies or to a third party. The City has also explored opportunities to utilize recycled water from the City of Corona in areas of the City where new development occurs that is not close to the City of Norco recycled water system facilities. Table 6-4 summarizes the projected direct beneficial recycled water use over the next 20 years.

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CWC 10633
(e) (Provide) a description of the actual use of recycled water in comparison to uses previously projected pursuant to this subdivision.

Table 6-4 Retail: Recycled Water Direct Beneficial Uses Within Service Area

6.2.12 Planned Versus Actual Use of Recycled Water
Future recycled water customers that have been evaluated include golf courses, municipal parks, landscape maintenance districts, schools, dual plumbing, agriculture, freeway landscaping, sales to other agencies or groundwater recharge. There was no actual recycled water use projected in 2020 or used in 2025 as identified in Table 6-5.

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Water Code Section 10633
The plan shall provide, to the extent available, information on recycled water and its potential for use as a water source in the service area of the urban water supplier… and shall include the following:
(g) A plan for optimizing the use of recycled water in the supplier’s service area, including actions to facilitate the installation of dual distribution systems, to promote recirculating uses, to facilitate the increased use of treated wastewater that meets recycled water standards, and to overcome any obstacles to achieving that increased use.

Table 6-5 Retail: 2020 Recycled Water Use Projection Compared to 2025 Actual

6.2.13 Actions to Encourage and Optimize Future Recycled Water Use The City is evaluating the potential future use of recycled water at park sites and landscape areas where recycled water facilities exist, but have not quantified the potential usage or determined the feasibility at this time. The City is in the process of obtaining approvals to use recycled water to replenish Lake Norconian and expects to initiate this by 2027.

If the City of Norco provides recycled water in the future, they have adopted recycled water rates to allow customers to be added to the system. Recycled water deliveries will also reduce potable water consumption, in an effort to meet mandated water conservation measures. The City plans to use recycled water to replenish Lake Norconian in the future, as shown in Table 6-6.

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Water Code Section 10631(c)
Describe the opportunities for exchanges or transfers of water on a short-term or long-term basis.

Water Code Section 10631(g)
Describe the opportunities for development of desalinated water, including, but not limited to, ocean water, brackish water, and groundwater, as a long-term supply.

Table 6-6 Retail: Methods to Expand Future Recycled Water Use

6.2.14 Desalinated Water Opportunities
The UWMPA requires that the UWMP address the opportunities for development of desalinated water, including ocean water, brackish water and groundwater. Currently there is no opportunity for ocean water desalination directly by the City, but the City is a member of the Chino Desalter Authority and purchases water from the Arlington Desalter facility. At this time, it is neither practical nor economically feasible for the City to implement a seawater desalination program. However, the City may participate in a regional partnership if presented as a reliable opportunity for future water supply solutions.

6.2.15 Exchanges or Transfers
Regional water transfer and exchange opportunities are discussed with regional partners. The City is discussing multiple short-term and long-term potable water and recycled water transfer projects with regional partners.

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6.2.16 Emergency Interties
The City has emergency interties with Jurupa Community Services District and the City of Corona.

6.2.17 Future Water Projects
The City does not have plans for future water supply projects or programs to meet future water demand requirements (Table 6-7).

Water Code Section 10631 (f)
Include a description of all water supply projects and water supply programs that may be undertaken by the urban water supplier to meet the total projected water use, as established pursuant to subdivision (a) of Section 10635. The urban water supplier shall include a detailed description of expected future projects and programs that the urban water supplier may implement to increase the amount of the water supply available to the urban water supplier in normal and single dry water years and for a period of drought lasting five consecutive water years. The description shall identify specific projects and include a description of the increase in water supply that is expected to be available from each project. The description shall include an estimate with regard to the implementation timeline for each project or program.

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Water Code 10631
(b) Identify and quantify, to the extent practicable, the existing and planned sources of water available to the supplier over the same five-year increments described in subdivision (a), providing supporting and related information, including all of the following… (b)(2) When multiple sources of water supply are identified, a description of the management of each supply in correlation with the other identified supplies. (h) An urban water supplier that relies upon a wholesale agency for a source of water shall provide the wholesale agency with water use projections from that agency for that source of water in five-year increments to 20 years or as far as data is available. The wholesale agency shall provide information to the urban water supplier for inclusion in the urban water supplier’s plan that identifies and quantifies, to the extent practicable, the existing and planned sources of water as required by subdivision (b), available from the wholesale agency to the urban water supplier over the same five-year increments, and during various water-year types in accordance with subdivision (f). An urban water supplier may rely upon water supply information provided by the wholesale agency in fulfilling the plan informational requirements of subdivisions (b) and (f).

Table 6-7 Retail: Expected Future Water Supply Projects or Programs

6.2.18 Summary of Existing and Planned Sources of Water Table 6-8 summarizes the actual water supply capacities for 2025 and Table 6-9 summarizes the projected water supplies over the next 20 years in 5 year increments. The supplies have

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been reduced in comparison to the 2020 UWMP due to the local groundwater wells that have become inactive in recent years.

Table 6-8 Retail: Water Supplies - Actual
Table 6-9 Water Supplies – Projected

6.2.19 Climate Change Effects
The local region experienced a prolonged drought from 1987 through 1992 and 2009 through 2015. The City continued to meet its customer’s water demands through careful management of its groundwater sources, cooperative agreements, and asserting water conservation measures. Community involvement made it possible to have voluntary water rationing during this period.

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Water Code Section 10631.2. (a)
In addition to the requirements of Section 10631, an urban water management plan shall include any of the following information that the urban water supplier can readily obtain:
(1) An estimate of the amount of energy used to extract or divert water supplies. (2) An estimate of the amount of energy used to convey water supplies to the water treatment plants or distribution systems.
(3) An estimate of the amount of energy used to treat water supplies. (4) An estimate of the amount of energy used to distribute water supplies through its distribution systems.
(5) An estimate of the amount of energy used for treated water supplies in comparison to the amount used for nontreated water supplies.
(6) An estimate of the amount of energy used to place water into or withdraw from storage. (7) Any other energy-related information the urban water supplier deems appropriate.

The City has invested its resources in multiple groundwater basins, creating supply flexibility, and has maintained surface water connections. The City has also been involved with regional stakeholders to develop strategies to increase water opportunities.

6.3 Energy Use
As discussed throughout this report, the City of Norco purchases the majority of its water from other agencies and does not have operational control of their treatment processes or water systems. Water delivered to Norco from these agencies is extracted groundwater from within their respective service areas or basins, treated and delivered at a hydraulic grade line that allows it to be supplied directly into Norco’s water system.

The energy efficiency of these third-party systems is important to Norco’s focus on sound planning and appropriate investments in water supply, water use efficiency, regional delivery infrastructure and emergency preparedness. The energy intensity of retail agencies helps with planning for future system needs. Several factors will affect the energy intensity of water delivery over time and agencies should be aware of these factors. A decrease in water demand in a service area may create a situation where the energy intensity of each AF delivered actually increases as agencies operate the same pumps and water treatment facilities as before. When tracking energy intensity over time, agencies should keep factors such as these in mind and focus on the efficiency of each facility they operate.

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Each agency has a unique geography and customer set that they serve so energy intensities of different agencies can be compared for informational purposes, but operational needs and constraints should be considered. For example, agencies with elevation changes in their service area will inherently have higher pumping energy demands than agencies without elevation changes. Additionally, some agencies have water treatment within their operational control while others deliver already treated water – leading to wide ranges in the energy demand among different agencies. The City of Norco tracks their groundwater and booster pumping efficiency through annual tests performed by their energy provider.

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Water Code Section 10635(a)
Every urban water supplier shall include, as part of its urban water management plan, an assessment of the reliability of its water service to its customers during normal, dry, and multiple dry water years. This water supply and demand assessment shall compare the total water supply sources available to the water supplier with the long-term total projected water use over the next 20 years, in five-year increments, for a normal water year, a single dry water year, and a drought lasting five consecutive water years. The water service reliability assessment shall be based upon the information compiled pursuant to Section 10631, including available data from state, regional, or local agency population projections within the service area of the urban water supplier.

CHAPTER 7

WATER SUPPLY RELIABILITY AND DROUGHT RISK ASSESSMENT

7.1 Introduction
The UWMPA requires that the UWMP address the reliability of the agency’s water supplies.

This includes supplies that are vulnerable to seasonal or climatic variations. In addition, an analysis must be included to address supply availability in a single dry year and in multiple dry years.

The City faces many of the same water supply issues as other water purveyors in Southern California. Drought, climatic challenges, water conveyance, environmental regulation, and competition for water from outside the region all force changes in water deliveries and the timing of those deliveries.

Development of numerous local and regional sources augment the reliability of the imported water system. The water supplies available to Norco’s service area are projected to meet fullservice demands starting 2026 through 2050 during normal years, single dry year, and five consecutively dry years.

Water quality is an important factor in determining supply reliability; if adequate quality cannot be maintained, then the supply may be lost. In general, the City is well-equipped to handle a variety of constituents present in its supply sources that can affect water quality.

Although the City does not rely heavily on imported water, it purchases imported water supplied by WMWD that is wheeled through a connection with the City of Corona. This water is imported to the region by MWD. Because of competing needs and uses associated with these water resources, MWD has undertaken a number of planning efforts during the past 20 years.

Some of the most recent documents include the 2020 Integrated Water Resources Plan update, the Water Surplus and Drought Management Plan, the Water Supply Allocation Plan, and a Long-Term Conservation Plan. These documents were valuable tools and assisted with the preparation of this document.

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Water Code Section 10635(a)
Every urban water supplier shall include, as part of its urban water management plan, an assessment of the reliability of its water service to its customers during normal, dry, and multiple dry water years. This water supply and demand assessment shall compare the total water supply sources available to the water supplier with the long-term total projected water use over the next 20 years, in five-year increments, for a normal water year, a single dry water year, and a drought lasting five consecutive water years. The water service reliability assessment shall be based upon the information compiled pursuant to Section 10631, including available data from state, regional, or local agency population projections within the service area of the urban water supplier.

Water Code Section 10631 (b)(1)
A detailed discussion of anticipated supply availability under a normal water year, single dry year, and droughts lasting at least five years, as well as more frequent and severe periods of drought, as described in the drought risk assessment. For each source of water supply, consider any information pertinent to the reliability analysis conducted pursuant to Section 10635, including changes in supply due to climate change.

Groundwater supplies are considered the most reliable supply source for the City of Norco since they are not normally impacted by short term droughts. However, a groundwater basin must be replenished in years with above normal rainfall in order to maintain the supply in drought years. Hence, in extended droughts, levels within the groundwater basin may fall as the basin is not replenished through natural inflows.

The City has made efforts in the past years to decrease its reliance on imported water by developing additional local and regional groundwater supply resources.

As discussed in Chapter 4, the City is a member agency of WRCRWA, a Joint Powers Authority, that operates a wastewater treatment facility. The City owns 2.7 MGD of treatment capacity. The plant treated effluent that is currently not being supplied to member agencies is discharged directly to the Santa Ana River Basin. Recycled water is generally considered to be a reliable water supply since the wastewater facilities provide effluent regardless of climatic conditions. It is not likely that drought conditions would have a significant effect on the City’s ability to utilize this recycled water source.

7.2 Water Service Reliability Assessment
The City of Norco has developed local groundwater sources and upgraded its water treatment plant to create additional high-quality water. As discussed previously, the City has multiple water sources to meet its demands during normal or drought years.

7.2.1 Service Reliability - Constraints on Water Sources At this time the City of Norco recognizes that under various conditions water quality may become a water delivery constraint. Currently groundwater sources and purchased water sources provide reliable high quality water to the City.

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Water Code Section 10631 (b)(1)
A detailed discussion of anticipated supply availability under a normal water year, single dry year, and droughts lasting at least five years, as well as more frequent and severe periods of drought, as described in the drought risk assessment. For each source of water supply, consider any information pertinent to the reliability analysis conducted pursuant to Section 10635, including changes in supply due to climate change.

7.2.2 Types of Years
There are two primary aspects of supply reliability that should be considered. The first relates to immediate service needs and is primarily a function of the availability and adequacy of the supply facilities. The second aspect is climate-related, and involves the availability of water during mild or severe drought periods. This section compares water supplies and demands during three water year types, a normal/average water year, single-dry water year, and multiple-dry water years. Table 7-1 provides the basis of water year data utilized in this study.

7.2.2.1 Average Year
The normal or average year type is a year in the historical sequence that most closely represents median runoff levels and patterns. The supply quantities for this condition are derived from historical average production yields.

7.2.2.2 Single-dry year
The single-dry year is defined as a year with the minimum useable supply. The supply quantities for this condition are derived from the minimum historical annual production yield.

7.2.2.3 Multiple-dry year period
Multiple-dry year is defined as three or more consecutive years with the minimum useable supply. Water systems are more vulnerable to these droughts of long duration, because they deplete water storage reserves in local and state reservoirs and in groundwater basins. The supply quantities for this condition are derived from the minimum historical three consecutive years’ annual average yields.

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Water Code Section 10635(a)
Every urban water supplier shall include, as part of its urban water management plan, an assessment of the reliability of its water service to its customers during normal, dry, and multiple dry water years. This water supply and demand assessment shall compare the total water supply sources available to the water supplier with the long-term total projected water use over the next 20 years, in five-year increments, for a normal water year, a single dry water year, and a drought lasting five consecutive water years. The water service reliability assessment shall be based upon the information compiled pursuant to Section 10631, including available data from state, regional, or local agency population projections within the service area of the urban water supplier.

Table 7-1 Retail: Basis of Water Year Data

7.2.2.4 Sources for Water Data
Over the last several years, the City’s potable water supply has shifted to rely more heavily on deliveries of water imported from WMWD. This is due to reduced reliance on local groundwater wells as a result of water quality concerns. In identifying historic supply reliability conditions throughout dry year and multiple dry year events, the specific periods or years are consistent with the years in MWD’s UWMP.

7.2.3 Service Reliability - Constraints on Water Sources

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The UWMP requires that the City demonstrate that sufficient water supplies be available to meet the next 20 years of projected water demands. During normal water years, no curtailments or other reductions in supply are expected for any of the City’s supplies. The projected normal water year supplies and demands from 2030 to 2050 are shown in Table 7-2.

The source water supply is larger than the demand in all years, so the City is not expected to have any supply shortfalls during normal water years or any issues with providing a reliable and consistent supply of water over the next 20 years.

Table 7-2 Retail: Normal Water Year Supply and Demand Comparison During single-dry water years, there may be up to a 50 percent curtailment in the City’s surface water supplied by WMWD. The City only relies on surface water supplies in emergency situations so this reduction would not impact the planned water supplies. Additionally, no reductions are anticipated for the City’s purchased water, groundwater, or recycled water supplies. The projected single-dry water year supplies from 2030 to 2050 are shown in Table 7-3. During a single dry year, water use was anticipated to be the same as in a normal year as minimal increases in demand due to less precipitation would likely be offset by voluntary water use reductions.

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Table 7-3 Retail: Single Dry Year Supply and Use Comparison Because the City’s surface water supply is the only supply that is considered to be susceptible to dry water years, and because the City only relies on surface water in emergency situations, a reduction of 100 percent would not affect multiple dry-year demands. The City supplies available during multiple-dry water years are assumed to be no different than supplies available during single-dry water years. The projected multiple-dry water year supplies and demands from 2030 to 2050 are shown in Table 7-4. During multiple dry years, water use is anticipated to remain the same in the first year, but then be gradually reduced in subsequent years as water conservation measures are implemented. Water use is assumed to be reduced by 5 percent in the second year and 5 percent annually in each of the remaining years as more strict water use restrictions are implemented.

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Water Code Section 10620(f)
An urban water supplier shall describe in the plan water management tools and options used by that entity that will maximize resources and minimize the need to import water from other regions.

Table 7-4 Retail: Multiple Dry Year Supply and Use Comparison

7.2.4 Description of Management Tools and Options
The City has improved its water supply sources resulting in a flexible capacity to meet its customer’s water demands. The City has entered into water purchase agreements with the WMWD (Arlington Desalter) and the Chino Desalter Authority resulting in reverse osmosis treated groundwater source availability being provided from two separate groundwater basins.

The City entered into a water purchase agreement with the City of Riverside to purchase potable water from a third groundwater basin. These source enhancements allow the City to manage its water supplies during both wet and dry years.

As mentioned previously, the City is considering possible future projects to utilize recycled water available from the WRCRWA treatment facility in order to further improve the City’s water supply reliability, improve basin overdraft condition by offsetting groundwater pumping, and put recycled water into beneficial use.

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The City recognizes the need to continue to develop additional high quality water sources. With the potential of equipment failures, natural disasters, and drought, the City is committed to inter-agency coordination and regional solutions to adequately prepare to meet future water demands.

Historical water deliveries provide an indication, but not a certainty, as to the reliability of future water supplies. Water quality, regulatory changes, facility failures, and climate can influence water deliveries.

At this time, WMWD has outlined plans for over 90 projects which range in scale from regional to local, but all of which provide some benefit to the City. These projects fall primarily into the following categories:
• Conveyance
• Conjunctive Management and Groundwater Storage
• Recycled Municipal Water
• Flood Control
• Groundwater and Aquifer Remediation
• Matching Water Quality to Use
• Pollution Prevention
• Recharge Area Protection
• Urban Runoff Management
A more complete list and outline of future projects can be found in WMWD’s Integrated Regional Water Management Plans and their 2025 UWMP.

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7.3 Drought Risk Assessment
CWC Section 10635(b) requires every urban water supplier to include, as part of its UWMP, a DRA for its water service as part of information considered in developing its demand management measures and water supply projects and programs. The DRA is a specific planning action that assumes Norco is experiencing a drought over the next five years and addresses Norco’s water supply reliability in the context of presumed drought conditions.

Together, the water service reliability assessment, DRA, and WSCP will allow Norco to have a comprehensive picture of its short-term and long-term water service reliability and to identify the tools to address any perceived or actual shortage conditions.

CWC Section 10612 requires the DRA to be based on the driest five-year historic sequence for Norco’s water supply. However, CWC Section 10635 also requires that the analysis consider plausible changes on projected supplies and demands due to climate change, anticipated regulatory changes, and other locally applicable criteria.

Water Code Section 10635(b)
Every urban water supplier shall include, as part of its urban water management plan, a drought risk assessment for its water service to its customers as part of information considered in developing the demand management measures and water supply projects and programs to be included in the urban water management plan. The urban water supplier may conduct an interim update or updates to this drought risk assessment within the five-year cycle of its urban water management plan update. The drought risk assessment shall include each of the following:
(1) A description of the data, methodology, and basis for one or more supply shortage conditions that are necessary to conduct a drought risk assessment for a drought period that lasts five consecutive water years, starting from the year following when the assessment is conducted.
(2) A determination of the reliability of each source of supply under a variety of water shortage conditions. This may include a determination that a particular source of water supply is fully reliable under most, if not all, conditions. (3) A comparison of the total water supply sources available to the water supplier with the total projected water use for the drought period.
(4) Considerations of the historical drought hydrology, plausible changes on projected supplies and demands under climate change conditions, anticipated regulatory changes, and other locally applicable criteria.

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Every urban water supplier is required to assess the reliability of their water service to its customers under a normal year, a single dry year, and multiple dry water years. The water service reliability assessment compares projected supply to projected demand for three long term hydrological conditions: a normal year, a single dry year, and a drought period lasting five consecutive years.

With drought and emergency situations continuously a threat to our water supply, the City of Norco has had a Water Supply Shortage Contingency Plan in place since 2009 to strategically reduce water consumption in severe circumstances.

The Sustainable Groundwater Management Act or “SGMA” is a California law that gives local agencies new tools for managing groundwater and planning for the future. The City of Corona, City of Norco, and Home Gardens County Water District have formed the Temescal Subbasin Groundwater Sustainability Agency (Temescal GSA) in order to make a Groundwater Sustainability Plan for the Temescal Basin.

Sustainable management of the Temescal Basin is critical to local water supply reliability. The three local agencies (both individually and jointly) have developed water supply portfolios including imported water, groundwater from multiple local basins, and reclaimed water for landscape irrigation. Water conservation measures also have been implemented, providing an important tool for responding to water shortages. Local agencies are active in regional water management, and recognize that local groundwater is a primary source of supply and needs to be reliable. The Temescal Basin area historically has experienced significant land use changes, shifting from agricultural to urban land uses. This transition was achieved in part with reliance on local groundwater. In fact, the Corona Groundwater Management Plan (GWMP) indicated that overdraft conditions occurred in the Temescal Basin during the last three years of the 1990 to 2004 period as pumping increased. While conditions subsequently improved, this illustrates that overdraft can occur. Concerns about water supply reliability persist, given the uncertainties of imported water and climate change.

The Chino Groundwater Basin is an adjudicated basin, managed by the Chino Basin Watermaster. The City is a member of the Appropriative Pool in the Chino Basin.

Table 7-5 summaries the five-year drought risk assessment. Water use was based on a straight line projection between 2025 and 2030 based on data presented previously in this report.

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Table 7-5 Five-Year Drought Risk Assessment

7.3.1 DRA Data, Methods, and Basis for Water Shortage Conditions Table 7-5 indicates the flexibility of the City of Norco water sources to reliably meet water demands from multiple groundwater basins and suppliers during the driest consecutive fiveyear drought period. If a source was not available in the second or any subsequent year of the drought, Norco could reliably meet water demands during the drought year. The City of Norco has developed water supplies that are purchased or extracted from four separate water basins, and from MWD, regardless of hydrologic conditions.

7.3.2 DRA Individual Water Source Reliability
The majority of the City’s local groundwater supplies are pumped from the Temescal and Chino groundwater basins. The City has four wells in the Temescal basin that have an annual capacity of approximately 4,500 AF, but three of these wells have become inactive in recent years due to poor water quality. The three inactive wells in the Chino Basin have the ability to produce approximately 3,000 AF per year. Unfortunately, the annual safe yield in the Chino basin is approximately 200 AF and these wells have water quality challenges.

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Water purchased by the City from the Chino Desalter Authority is extracted from the Chino groundwater basin. The City owns 1,000 AF per year capacity of reverse-osmosis treated water from the CDA. Water purchased by the City from the Arlington Desalter is extracted from the Arlington groundwater basin. The City has an agreement to purchase a minimum of 4,400 AF per year of reverse-osmosis treated water from the Arlington Desalter. The Arlington Desalter has an overall capacity of approximately 7,000 AF per year.

The majority of the water purchased from the City of Riverside originates from the Raymond groundwater basin. The City has an agreement to purchase up to 2,300 AF per year of potable water from the City of Riverside.

The City has the ability to purchase imported treated water from Western Municipal Water District through a metered connection to the City of Corona. This connection has a capacity of approximately 1,200 AF per year.

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CHAPTER 8

WATER SHORTAGE CONTINGENCY PLAN
The UWMPA requires that the City has an urban water shortage contingency analysis that includes stages of action to be undertaken in the event of water supply shortages, a draft water shortage contingency resolution or ordinance, prohibitions, consumption reduction methods and penalties; an analysis of revenue and expenditure impacts and measures to overcome these impacts, actions to be taken during a catastrophic interruption, and a mechanism for measuring water use reduction. This chapter references several relevant ordinances and resolutions related to water conservation.

In response to the severe drought of 2012-2016, new legislation in 2018 created a WSCP mandate replacing the water shortage contingency analysis under former law. While overlapping aspects of the prior law, the new requirements have several prescriptive elements a Supplier’s WSCP must now include, key attributes of its Water Supply Reliability Analysis conducted pursuant to Water Code Section 10635. [Water Code Section 10632(a)(1)].

The new requirements include procedures for conducting an annual water supply and demand assessment with prescribed elements. Under Water Code Section 10632.1, urban water Suppliers are required to submit, by July 1 of each year, beginning in the year following adoption of the 2020 UWMP, an annual water shortage assessment report to DWR. [Water Code Section 10632 (a)(2)].

8.1 Water Supply Reliability Analysis
The City has invested considerable effort and capital in developing a diverse water supply to ensure redundancy and flexibility in dealing with supply interruptions. Historically, the City has responded to water shortages through implementation of various conservation measures. In 1977, the City adopted a resolution and Ordinance 397 for a program of voluntary reduction of nonessential uses of water to reduce consumption by 15 percent during the multiple year drought at the time. Currently, Norco Municipal Code Chapter 14.04.220 - Emergency Water Conservation Program details the City’s current water conservation rules and water shortage contingency plan. As shown in Table 8.1, the water shortage stages include consideration of Water Code Section 10632.3
It is the intent of the Legislature that, upon proclamation by the Governor of a state of emergency under the California Emergency Services Act (Chapter 7 (commencing with Section 8550) of Division 1 of Title 2 of the Government Code) based on drought conditions, the board defer to implementation of locally adopted water shortage contingency plans to the extent practicable.

Water Code Section 10632(a)(1)
The analysis of water supply reliability conducted pursuant to Section 10635.

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water shortages up to Stage V, a Water Shortage Emergency, which includes reductions in water consumption by more than 50 percent.

All requirements of the City’s Water Conservation Ordinance are in effect during normal water conditions. The waste of water is prohibited and defined in the Water Conservation Ordinance as:
• Do not use water to wash down sidewalks, driveways, parking areas, tennis courts, patios, or other paved areas, except to alleviate immediate safety or sanitation hazards. • Adjust sprinklers and irrigation systems to avoid overspray, runoff, and waste.

Customers should also avoid watering on windy days.
• Irrigate all landscapes before dawn, if possible, but never between 8:00 a.m. and 8:00p.m. Use a hand-held hose equipped with a positive shut-off nozzle or bucket to water landscaped areas that are not irrigated by a landscape irrigation system. • Agricultural users are requested to reduce water usage and to consult with the local resource conservation district as needed or industry associations in their area for appropriate water conservation measures and to implement them as soon as possible. • Residents are urged to design and install water-wise landscaping utilizing native and other drought-tolerant plant materials and minimize turf areas for permanent water conservation.
• Developers of commercial properties are urged to design and install water-wise landscaping utilizing native and other drought-tolerant plant materials and minimize turf areas for permanent water conservation, as required by City landscape ordinances. • Install water-saving devices in indoor plumbing.
• Check faucets, toilets, and pipes, both indoors and outdoors, for leaks and repair them immediately.
• Use re-circulated water to operate decorative fountains, ponds, lakes or other similar aesthetic structures.
• Wash motor vehicles, trailers, boats, and all other mobile equipment using a bucket or a hand-held hose with a positive shut-off nozzle, mobile high-pressure/low-volume wash system, or at a commercial site that re-circulates (reclaims) water onsite. Avoid washing during hot conditions when additional water is required due to evaporation. • Restaurants or other public places where food is served shall not serve drinking water to any customer unless requested by a customer.
• Irrigation is prohibited during and for 48 hours after any measurable rainfall. • Operators of hotels and motels must provide guests with the option of choosing not to have towels and linens laundered daily. The hotel or motel shall prominently display notice of this option in each guestroom using clear and easily understood language.

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8.2 Annual Water Supply and Demand Assessment Procedures Prohibitions on End Uses
Starting in 2022, the City of Norco completes the required annual water supply and demand assessment and submits the Annual Water Shortage Assessment Report to Department of Water Resources.

Water Code Section 10632(a)(2)
The procedures used in conducting an annual water supply and demand assessment that include, at a minimum, both of the following:
(A) The written decision-making process that an urban water supplier will use each year to determine its water supply reliability.
(B) The key data inputs and assessment methodology used to evaluate the urban water supplier’s water supply reliability for the current year and one dry year, including all of the following:
(i) Current year unconstrained demand, considering weather, growth, and other influencing factors, such as policies to manage current supplies to meet demand objectives in future years, as applicable. (ii) Current year available supply, considering hydrological and regulatory conditions in the current year and one dry year. The annual supply and demand assessment may consider more than one dry year solely at the discretion of the urban water supplier. (iii) Existing infrastructure capabilities and plausible constraints. (iv) A defined set of locally applicable evaluation criteria that are consistently relied upon for each annual water supply and demand assessment.
(v) A description and quantification of each source of water supply.

Water Code Section 10632.1.

An urban water supplier shall conduct an annual water supply and demand assessment pursuant to subdivision (a) of Section 10632 and, on or before July 1 of each year, submit an annual water shortage assessment report to the department with information for anticipated shortage, triggered shortage response actions, compliance and enforcement actions, and communication actions consistent with the supplier’s water shortage contingency plan. An urban water supplier that relies on imported water from the State Water Project or the Bureau of Reclamation shall submit its annual water supply and demand assessment within 14 days of receiving its final allocations, or by July 1 of each year, whichever is later.

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8.3 Six Standard Water Shortage Levels
Table 8-1 Retail: Water Shortage Contingency Plan Levels Stage I. Water Shortage Watch
During Stage I, there is minimal potential for a supply shortage and a 5 to 10 percent or greater voluntary reduction is suggested.

All requirements of the City’s Water Conservation Ordinance are in effect for Stage I during normal conditions. Also, as in normal conditions, the State’s Model Water Efficient Landscape Water Code Section 10632(a)(3)
(A) Six standard water shortage levels corresponding to progressive ranges of up to 10, 20, 30, 40, and 50 percent shortages and greater than 50 percent shortage. Urban water suppliers shall define these shortage levels based on the suppliers’ water supply conditions, including percentage reductions in water supply, changes in groundwater levels, changes in surface elevation or level of subsidence, or other changes in hydrological or other local conditions indicative of the water supply available for use. Shortage levels shall also apply to catastrophic interruption of water supplies, including, but not limited to, a regional power outage, an earthquake, and other potential emergency events.
(B) An urban water supplier with an existing water shortage contingency plan that uses different water shortage levels may comply with the requirement in subparagraph (A) by developing and including a cross-reference relating its existing categories to the six standard water shortage levels.

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Ordinance is in effect in the City, per the State’s mandate as of January 1, 2010. Norco’s Water Conservation Program consists mainly of outdoor watering restrictions enforced through public participation, public education through local fairs and other events, bill inserts, newspaper articles, and WMWD’s regional outreach.

Enforcement procedures and penalties for water wasting continue as described in the City of Norco Municipal Code Chapter 14.04.220 - Emergency Water Conservation Program.

Stage II. Water Shortage Caution
During Stage II of a water supply shortage, the shortage is considered minor and a 10 percent up to 20 percent reduction in water usage is required for the City to meet the immediate needs of its customers. Water alert conditions are declared, the water shortage situation is explained to the public, and consumers are asked for a 10 percent or greater mandatory water use reduction.

Existing ongoing water conservation measures are continued and emphasized as necessary to alert the public of the nature of the water supply shortage. The City maintains an ongoing public information campaign consisting of distribution of literature, town hall meetings, bill inserts, and conversation messages on their web site. Educational programs in area schools are ongoing and utilized as necessary.

All requirements of Stage I remain in effect. Additional requirements include:
• All persons using water provided from the City shall comply with level I, water shortage watch, water conservation practices during a level II water shortage and shall also comply with the following additional conservation measures:
• Whether irrigated with potable or non-potable water, limit all ornamental and turf irrigation to four days per week for no more than 10 minutes per station per day. This provision does not apply to functional turf areas such as athletic fields at schools and parks.
• Ornamental landscape or turf that utilizes properly operating water-efficient devices which include, but are not limited to, drip/micro irrigation systems, stream rotor sprinklers, and are operated by a functional irrigation controller, may upon verification by the City or its representative be irrigated for up to 30 minutes per station on the days authorized for landscape irrigation.
• Verification and repair of all leaks shall occur within 72 hours of notification by the City unless other arrangements are approved by the City Manager or designee.

Enforcement procedures and penalties for water wasting continue as described in the City of Norco Municipal Code Chapter 14.04.220 - Emergency Water Conservation Program.

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Stage III. Water Shortage Alert
During Stage III, the water supply shortage is moderate. The City aggressively continues its public information and education programs. Consumers are asked for a 20 percent up to a 30 percent mandatory water use reduction.

All requirements of Stages I and II remain in effect. Additional requirements include:
• All persons using water provided from the City shall comply with level I, water shortage watch, and level II, water shortage caution, conservation practices during a level III, water shortage alert, condition and shall also comply with the following additional mandatory conservation measures:
• Whether irrigated with potable or non-potable water, limit all ornamental and turf irrigation to three days per week for no more than 10 minutes per station per day. • Ornamental landscape or turf that utilizes properly operating water-efficient devices which include, but are not limited to, drip/micro irrigation systems, stream rotor sprinklers, and are operated by a functional irrigation controller, may upon verification by the City or its representative, be irrigated for up to 20 minutes per station on the days authorized for landscape irrigation.
• The following irrigation schedule will be implemented and enforced: odd addresses (the last digit is an odd number) may irrigate on Monday, Wednesday and Friday. Even addresses (the last digit is an even number) may irrigate on Tuesday, Thursday and Saturday. There will be no authorized landscape irrigation on Sunday. • An alternative three-day schedule may be requested for irrigation of functional turf areas at schools and parks.
• Vehicles may only be washed at commercial carwashes that re-circulate water or by high-pressure/low-volume wash devices.
• Potable water may not be used for construction purposes. Non-potable and/or recycled water must be utilized.
• Verification and repair of all leaks shall occur within 48 hours of notification by the City.

Enforcement procedures and penalties for water wasting continue as described in the City of Norco Municipal Code Chapter 14.04.220 - Emergency Water Conservation Program.

Stage IV. Water Shortage Critical
During Stage IV of a water supply shortage, the shortage is severe and a 30 percent up to 40 percent reduction in water usage is required for the City to meet the immediate needs of its customers. The City aggressively continues its public information and education programs and

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consumers are asked for a 30 percent or greater mandatory water use reduction.

All requirements of Stages I, II, and III remain in effect. Additional requirements include:
• All persons using water provided by the City shall comply with level I, water shortage watch, level II, water shortage caution, and level III, water shortage alert, conservation practices during a level IV, water shortage critical, condition and shall also comply with the following additional mandatory conservation measures:
• Whether irrigated with potable or non-potable water, limit all irrigation to two days per week for no more than 10 minutes per station per day. Exemptions include:
• Maintenance of existing landscaping necessary for fire protection as specified by the Fire Marshal of the local fire protection agency having jurisdiction over the property to be irrigated. If fire protection landscaping is not sustainable by irrigation two days per week, irrigation may be increased to not more than three days per week • Maintenance of existing landscaping for erosion control may be irrigated up to three days per week, watering of livestock and other animals, Public works projects that support public health and safety; and actively irrigated environmental mitigation projects.
• Ornamental landscape or turf that utilizes properly operating water-efficient devices which include, but are not limited to, drip/micro irrigation systems, stream rotor sprinklers and are operated by a functional irrigation controller, may upon verification by the City or its representative be irrigated for up to 10 minutes per station on the days authorized for landscape irrigation.
• The following irrigation schedule will be implemented and enforced: odd addresses (the last digit is an odd number) may irrigate on Monday and Thursday. Even addresses (the last digit is an even number) may irrigate on Tuesday and Friday. There will be no authorized landscape irrigation on Wednesday, Saturday, and Sunday. • Upon the declaration of a water shortage response level IV water shortage critical condition, no new temporary construction meters shall be provided, no statements of immediate ability to serve or provide potable water service such as letters (“Will Serve”) of water availability shall be issued. No new potable water services or meters shall be provided, except under the following circumstances:
• A valid, unexpired building permit has been issued for a portion of a project for which construction is in progress;
• The project is necessary to protect the public’s health, safety, and welfare as determined by the City Council; or
• The applicant provides substantial evidence to the satisfaction of the City of an

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enforceable commitment that water demands for the project will be offset by 125 percent prior to the provision of a new water meter(s). This provision shall not be construed to preclude the resetting or turn-on of meters to provide continuation of water service or to restore service that has been interrupted for a period of one year or less.
• Upon the declaration of a water shortage response level IV condition, the City will suspend consideration of annexations to its service area, unless the annexation increases the water supply available to the City by more than the anticipated demands of the property to be annexed.
• To increase conservation, the City may establish a water allocation for property served.

The following method will be utilized which accounts for general public health and safety:

Residential and Multifamily Customers.
• The City Council will determine the water allocation target percentage for residential accounts in the resolution adopting a level IV water shortage response. • This calculation will not apply to any residential account that uses less than 10 units in the billing period to ensure water is provided for public health and safety. A residential water allocation target will be calculated for each account by comparing the current billing period usage to the same period in the previous year.

If the residential account uses more water than the water allocation target amount, a penalty will be applied as noted in Norco Municipal Code Chapter 14.04.220 - Emergency Water Conservation Program.

Commercial Customers.
• The City Council will determine the water allocation target percentage for commercial accounts in the resolution adopting a level IV water shortage response. • A commercial water allocation target will be calculated for each account by comparing the current billing period usage to the same period in the previous year. • If the commercial account uses more water than the water allocation target amount, said commercial account shall be subject to the penalties set forth herein. • Dedicated irrigation accounts must reduce their usage by a minimum of 50 percent. The amount may be adjusted by a resolution of the Board of Directors as deemed necessary to meet water supply demands.

An application may be made to the City Council for a variance from the water allocation target.

Enforcement procedures and penalties for water wasting continues as described in the City of Norco Municipal Code Chapter 14.04.220 - Emergency Water Conservation Program.

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Stage V. Water Shortage Emergency
During Stage V of a water supply shortage, the shortage is critical and a 50 percent or greater reduction in water usage is required for the City to meet the immediate needs of its customers.

The City aggressively continues its public information and education programs and consumers are asked for a 50 percent or greater mandatory water use reduction.

All requirements of Stages I, II, III, and IV remain in effect. Additional requirements may include:
• To increase conservation, the City may establish a water allocation for the property served. The following method will be utilized which accounts for general public health and safety.

Residential and Multifamily Customers.
• The City Council will determine the water allocation target percentage for residential accounts in the resolution adopting a level 5 water shortage response. • This calculation will not apply to any residential accounts that use less than 10 units in the billing period to ensure water is provided for public health and safety. • A residential water allocation target will be calculated for each account by comparing the current billing period usage to the same period in the previous year. • If the residential account uses more water than the water allocation target amount, said residential accounts shall be subject to the penalties set forth herein.

Commercial Customers.
• The City Council will determine the water allocation target percentage for commercial accounts in the resolution adopting a level 5 water shortage response. • A commercial water allocation target will be calculated for each account by comparing the current billing period usage to the same period in the previous year. • If the commercial account uses more water than the water allocation target amount, said commercial account shall be subject to the penalties set forth herein. • Dedicated irrigation accounts must reduce their usage by 50 percent. The amount may be adjusted by a resolution of the City Council as deemed necessary to meet water supply demands.

An application may be made to the City Council for a variance from the water allocation target.

Enforcement procedures and penalties for water wasting continue as described in the City of Norco Municipal Code Chapter 14.04.220 - Emergency Water Conservation Program.

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Penalties, Charges, Other Enforcement of Prohibitions
A breakdown of the actions taken and/or violations and penalties in the event of water waste can be found in Norco Municipal Code Chapter 14.04.220 - Emergency Water Conservation Program.

8.4 Shortage Response Actions

8.4.1 Supply Augmentation
Table 8-2 summarizes the potential supply augmentation and other actions that can be taken.

CWC 10632
(a)(6) Penalties or charges for excessive use, where applicable Water Code Section 10632 (a)(4)
Shortage response actions that align with the defined shortage levels and include, at a minimum, all of the following:
(A) Locally appropriate supply augmentation actions.
(B) Locally appropriate demand reduction actionsto adequately respond to shortages. (C) Locally appropriate operational changes.
(D) Additional, mandatory prohibitions against specific water use practices that are in addition to state-mandated prohibitions and appropriate to the local conditions. (E) For each action, an estimate of the extent to which the gap between supplies and demand will be reduced by implementation of the action.

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Table 8-2 Retail: Supply Augmentation and Other Actions

8.4.2 Demand Reduction
CWC 10632
(a)(5) Consumption reduction methods in the most restrictive stages. Each urban water supplier may use any type of consumption reduction methodsin its watershortage contingency analysisthat would reduce water use, are appropriate for its area, and have the ability to achieve a water use reduction consistent with up to a 50 percent reduction in water supply.

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Table 8-3 Demand Reduction Actions
Consumption reduction methods are actions taken by the City in order to help reduce water consumption in its service area. These methods, briefly described in the narrative description above relative to each stage of the water conservation program, include ongoing public outreach and conservation activities described more completely as part of the discussion of DMMs in Chapter 9. Table 8-3 summarizes demand reduction actions that can be taken if necessary. The City’s Water Conservation Program uses several forms of public education to encourage water conservation on a continuous basis. In the event of a water shortage, some of these activities may be further augmented through supply actions as briefly described in Table 8-2.

8.4.3 Operational Changes
The City continues to explore regional water exchange opportunities and transfers. The City has created supply flexibility through purchase agreements, inter-connections and multiple groundwater basins.

CWC Section 10632(a)(2) requires an estimate of the minimum annual water supply availability during each of the next three water years (October 1 of the previous year to September 30 of 2016, 2017, and 2018) based on the driest three-year historical sequence for the agency’s water supply previously determined in Chapter 7.

The City of water supply has historically been 70 percent purchased reverse-osmosis treated groundwater and local groundwater. The reliability of the groundwater supply over a 3-year drought is assumed to be 100 percent. Even though regional groundwater levels have dropped slightly, no short-term groundwater supply problems are anticipated in the next three years, even if they remain dry. Recycled water for the next three years is based on the volume of wastewater treated, and available from the WRCRWA. As detailed in Chapter 7, a consistent

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reliable annual supply of 11,500 AF is anticipated.

8.4.4 Additional Mandatory Restrictions
The City has developed in-house restrictions regarding municipal park irrigation, facilities, and maintenance activity.

8.4.5 Emergency Response Plan
A catastrophic event that constitutes a proclamation of a water shortage is any event, either natural or manmade, that causes a severe shortage of water, synonymous with or with greater severity than the Stage III or Stage IV water conservation shortage conditions. The City has developed an SSMP for sewer operations includes appropriate personnel listings, resource inventories, locations for emergency operations centers, response procedures, and the steps necessary to resume normal operations.

The City maintains a sound preventative maintenance program for its distribution system.

Auxiliary generators are available and improvements to water facilities are made to minimize loss of these facilities during an earthquake or any disaster causing an electric power outage.

As described previously, the City has the ability to produce water from three individual groundwater basins creating water production flexibility.

8.4.6 Seismic Risk Assessment and Mitigation Plan
The City of Norco has completed requirements of the America’s Water Infrastructure Act of 2018. The City of Norco has created a general City-wide Emergency Response Plan which includes detailed water and wastewater emergency response plans.

Water Code Section 10632.5.(a)
In addition to the requirements of paragraph (3) of subdivision (a) of Section 10632, beginning January 1, 2020, the plan shall include a seismic risk assessment and mitigation plan to assess the vulnerability of each of the various facilities of a water system and mitigate those vulnerabilities. (b) An urban water supplier shall update the seismic risk assessment and mitigation plan when updating its urban water management plan as required by Section 10621. (c) An urban water supplier may comply with this section by submitting, pursuant to Section 10644, a copy of the most recent adopted local hazard mitigation plan or multi-hazard mitigation plan under the federal Disaster Mitigation Act of 2000 (Public Law 106-390) if the local hazard mitigation plan or multi-hazard mitigation plan addresses seismic risk.

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8.5 Communication Protocols
The City of Norco has multiple communication platforms in use. The City utilizes its own web site (www.norco.ca.us), a City App ([email protected]), Nixle (an emergency text alert platform) to communicate with the public. The City has a water billing portal that allows customers to manage their water bills and receive messages regarding water information. The City also uses social media platforms Facebook and Twitter. The City will coordinate with the County and other local agencies for the possible proclamation of a local emergency.

8.6 Compliance and Enforcement
Enforcement procedures and penalties for water wasting continue as described in the City of Norco Municipal Code Chapter 14.04.220 - Emergency Water Conservation Program. The Ordinance provides several definitions of the “waste of water,” outlines watering days and hours, describes the City’s enforcement procedures, and discusses the violations and infractions process.

The City has installed a system-wide automated meter reading system with access through the internet that allows the water department and customers to review and monitor their water usage.

Water Code Section 10632 (a)(5)
Communication protocols and procedures to inform customers, the public, interested parties, and local, regional, and state governments, regarding, at a minimum, all of the following:

Any current or predicted shortages as determined by the annual water supply and demand assessment described pursuant to Section 10632.1.

Any shortage response actions triggered or anticipated to be triggered by the annual water supply and demand assessment described pursuant to Section 10632.1. (C) Any other relevant communications
Water Code Section 10632 (a)(6)
For an urban retail water supplier, customer compliance, enforcement, appeal, and exemption procedures for triggered shortage response actions as determined pursuant to Section 10632.2.

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8.7 Legal Authorities
Section 10632(a)(8) of the CWC requires the inclusion of a water shortage contingency resolution or ordinance. The City of Norco has established an Emergency Water Conservation Program to determine and notify water customers that a water shortage existing and mandatory conservation measures must be enacted by City Council. If a water shortage is implemented by City Council, the following sample resolution would be used to formally enact any water shortage level prior to notifying water customers.

Water Code Section 10632 (a)(7)
(A) A description of the legal authorities that empower the urban water supplier to implement and enforce its shortage response actions specified in paragraph (4) that may include, but are not limited to, statutory authorities, ordinances, resolutions, and contract provisions. (B) A statement that an urban water supplier shall declare a water shortage emergency in accordance with Chapter 3 (commencing with Section 350) of Division 1. [see below] (C) A statement that an urban water supplier shall coordinate with any city or county within which it provides water supply services for the possible proclamation of a local emergency, as defined in Section 8558 of the Government Code.

Water Code Section Division 1, Section 350
Declaration of water shortage emergency condition. The governing body of a distributor of a public water supply, whether publicly or privately owned and including a mutual water company, shall declare a water shortage emergency condition to prevail within the area served by such distributor whenever it finds and determines that the ordinary demands and requirements of water consumers cannot be satisfied without depleting the water supply of the distributor to the extent that there would be insufficient water for human consumption, sanitation, and fire protection.

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RESOLUTION NO. 202X-XX

A RESOLUTION OF THE CITY COUNCIL OF THE CITY OF NORCO, CALIFORNIA,

ALLOWING THE DIRECTOR OF PUBLIC WORKS THE ABILITY TO INCREASE WATER

RESTRICTIONS DURING AN EMERGENCY WATER CONSERVATION EVENT LOCATED

IN NORCO CALIFORNIA
WHEREAS, Norco Municipal Code, Chapter 14.04.220 Article XXII Section, Emergency Water Conservation Program allows the Public Works Director to determine the degree of emergency and determine what additional restrictions of water use or other appropriate actions must be taken to protect the water system and the citizens of Norco; and WHEREAS, the City of Norco is experiencing water shortages, therefore; BE IT RESOLVED the City of Norco Council full support is given to the Public Works Director to make the appropriate recommendations which may include increased restrictions on watering days and hours, restrictions on washing vehicles, etc., restrictions on large water users, restrictions on flushing of water lines, restrictions on the filling of swimming pools, and increases in the current penalties for not complying with water conservation restrictions for the duration of the emergency, and urge full support and cooperation from the citizens of Norco.

PASSED AND ADOPTED by the City Council at a regular meeting held on , 20XX.

Mayor of the City of Norco, California
ATTEST:

XXXXX, City Clerk
City of Norco, California

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8.8 Financial Consequences of WSCP
Section 10632(a)(7) of the CWC requires an analysis of the impacts of the actions taken for conservation and water restriction on the revenues and expenditures of the water supplier, along with measures to overcomes these impacts.

With the implementation of the water conservation measures mandated by the 2015 Executive Order, expenditures are expected to increase due to the executed water purchase agreements requiring the City to “take or pay”. These agreements will require the City to continue purchasing the more expensive treated water in lieu of producing less expensive local groundwater. The City completed a rate study during 2025 and created a rate model that is adjusted annually to ensure an ongoing revenue stream that will adequately support operation of the utility. For a catastrophic shortage, the City would use financial reserves to support the operation of the utility in the short term. For a long-term shortage, such as a multi-year drought, the City would make rate adjustments or institute drought pricing as needed.

8.9 Monitoring and Reporting
Section 10632(a)(9) of the CWC requires that the urban suppliers include a mechanism for determining actual reductions in water use. For metered accounts, reductions in water use for each user can be determined based on meter readings. As described previously, the City installed an automated water meter system at all service connections.

In the event of a water shortage, the City will audit its production and consumption meters more frequently to detect potential water loss and/or individual usage increases.

Water Code Section 10632(a)(8)
A description of the financial consequences of, and responses for, drought conditions, including, but not limited to, all of the following:
(A) A description of potential revenue reductions and expense increases associated with activated shortage response actions described in paragraph (4).
(B) A description of mitigation actions needed to address revenue reductions and expense increases associated with activated shortage response actions described in paragraph (4). (C) A description of the cost of compliance with Chapter 3.3 (commencing with Section 365) of Division 1.

Water Code Section 10632(a)(9)
For an urban retail water supplier, monitoring and reporting requirements and procedures that ensure appropriate data is collected, tracked, and analyzed for purposes of monitoring customer compliance and to meet state reporting requirements.

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The City can track its water use reduction through the state’s DRINC portal, operated by the State Water Resources Control Board, which records the monthly usage by urban water suppliers made mandatory by drought emergency regulations. The website tracks water use reduction by comparing each supplier’s monthly total potable water production with prior monthly total production.

8.10 WSCP Refinement Procedures
A water shortage contingency plan is a strategic planning process that Norco will use to prepare for and respond to water shortages. A water shortage, when water supply availability is insufficient to meet the normally expected customer water use at a given point in time, may occur due to a number of reasons, such as water supply quality changes, climate change, drought, and catastrophic events (e.g., earthquake). The City of Norco WSCP will provide a water supply availability assessment and structured steps designed to respond to actual conditions. This level of detailed planning and preparation will help maintain reliable supplies and reduce the impacts of supply interruptions.

8.11 Special Water Feature Distinction
The City of Norco has developed a Water Efficient Landscaping Ordinance that is consistent with the legislative findings, the purpose of this ordinance is to promote the values and benefits of landscaping practices that integrate and go beyond the conservation and efficient use of water and establish a structure for planning, designing, installing, maintaining and managing water efficient landscapes in new construction and rehabilitated projects by encouraging the use of a watershed approach that requires cross-sector collaboration of industry, government and property owners to achieve as many benefits as possible. The ordinance is intended to implement the California Department of Water Resources Model Water Efficient Landscape Ordinance (MWELO) as adopted by the California Water Commission. This zoning code addresses special water features within the City’s water system.

Water Code Section 10632 (a)(10)
Reevaluation and improvement procedures for systematically monitoring and evaluating the functionality of the water shortage contingency plan in order to ensure shortage risk tolerance is adequate and appropriate water shortage mitigation strategies are implemented as needed.

Water Code Section 10632 (b)
For purposes of developing the watershortage contingency plan pursuant to subdivision (a), an urban water supplier shall analyze and define water features that are artificially supplied with water, including ponds, lakes, waterfalls, and fountains, separately from swimming pools and spas, as defined in subdivision (a) of Section 115921 of the Health and Safety Code.

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8.12 Plan Adoption, Submittal and Availability
The WSCP will serve as the operating manual that the City of Norco will use to prevent catastrophic service disruptions through proactive, rather than reactive, mitigation of water shortages. The WSCP will contain the processes and procedures that will be deployed when shortage conditions arise so that the Norco governing body, its staff, and its regional stakeholders can easily identify and efficiently implement pre-determined steps to mitigate a water shortage to the level appropriate to the degree of water shortfall anticipated.

Water Code Section 10632 (c)
The urban water supplier shall make available the water shortage contingency plan prepared pursuant to this article to its customers and any city or county within which it provides water supplies no later than 30 days after adoption of the water shortage contingency plan.

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CHAPTER 9

DEMAND MANAGEMENT MEASURES

9.1 Existing Demand Management Measures for Retail Suppliers The City actively encourages community participation in its water conservation efforts per City Municipal Code Chapter 18.55 – Water Efficient Landscaping. BMPs are water conservation practices that have been identified by the California Urban Water Conservation Council, conferences, BMP workshops, free publications, research regarding water management practices, leadership legislation, and networking with other agencies and special interest groups.

A description of the City’s recommended water demand measures that may be implemented, or are scheduled for analysis. The City has planned for a potable water and recycled water rate study, waste water prevention ordinances, development of public information programs, distribution system audits, recycled water programs, and regional partnerships. The City has attempted to institute and comply with all BMPs where applicable. The UWMP outlines water conservation programs and BMPs currently implemented and planned by the City.

Water Code Section 10631
(e) Provide a description of the supplier’s water demand management measures. This description shall include all of the following:
(1)(A) For an urban retail water supplier, as defined in Section 10608.12, a narrative description that addressesthe nature and extent of each water demand management measure implemented over the past five years. The narrative shall describe the water demand management measure that the supplier plans to implement to achieve its water use targets pursuant to Section 10608.20. (B) The narrative pursuant to this paragraph shall include descriptions of the following water demand management measures:
(i) Water waste prevention ordinances.
(ii) Metering.
(iii) Conservation pricing.
(iv) Public education and outreach.
(v) Programs to assess and manage distribution system real loss. (vi) Water conservation program coordination and staffing support. (vii) Other demand management measures that have a significant impact on water use as measured in gallons per capita per day, including innovative measures, if implemented.

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9.1.1 Water Waste Prevention Ordinances
The City’s ongoing Water Conservation Ordinance (Norco Municipal Code, Chapter 14.04 first implemented in 1977 with the most recent update going into effect in 2015, it defines water waste prohibitions for the City’s customers.

The Ordinance provides several definitions of the “waste of water,” outlines watering days and hours, describes the City’s enforcement procedures, and discusses the violations and infractions process.

The effectiveness of the Water Conservation Ordinance can be determined by the overall reduction in water use. An effective way to evaluate the efforts of conservation is a periodic review of individual customer water use. Various studies have estimated water savings as a result of metering and commodity pricing. The City will continue to monitor the effectiveness of their DMM, through coordination with other DMMs, such as public education and outreach and water conservation programs. Combining customer education and outreach with this DMM is likely to improve its overall effectiveness. The City’s outreach efforts are described more thoroughly in the Public Education and Outreach section.

9.1.2 Metering
The City meters all potable water sources and wastewater discharges. The City also meters all potable water customers. The City has installed an automated meter reading system with access through the internet for customers to review and monitor their water usage.

9.1.3 Conservation Pricing
The City completed and adopted an updated water rate study in 2025. The water rate structure consists of a fixed monthly charge and uniform usage rates based on water usage. The usage rates are a flat charge per unit of water used. The fixed monthly charges and water usage rates are projected to increase gradually each year over the next five years.

Water Code Section 526
(a) Notwithstanding any other provisions of law, an urban water supplier that, on or after January 1, 2004, receives water from the federal Central Valley Project under a water service contract or subcontract... shall do both of the following:
(1) On or before January 1, 2013, install water meters on all service connections to residential and nonagricultural commercial buildings... located within its service area.

Water Code Section 527
(a) An urban water supplier that is not subject to Section 526 shall do both the following:
(1) Install water meters on all municipal and industrial service connections located within its service area on or before January 1, 2025.

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9.1.4 Public Education and Outreach
The City has actively encouraged community participation in its water management planning efforts. The City has an active website, participates in social media, and developed an APP called Nixle to facilitate messaging. The majority of public education and outreach programs are administered by WMWD for the benefit their member agencies which includes the City of Norco. This ensures thorough coverage and consistent messaging.

9.1.5 Programs to Assess and Manage Distribution System Real Loss The City has a five-year water capital improvement fund program designed to fund the replacement of distribution water lines, and other water infrastructure. The City installed an automated meter reading system in 2005 on all service connections.

9.1.6 Water Conservation Program Coordination and Staffing Support The City does not have a formal water conservation program division. The City utilizes staff from all departments to assist with water conservation activities. WMWD has a water conservation program staff administering the extensive programs for their member agencies.

The City is a member of Water Education Advisory Council (WEAC).

9.1.7 Other Demand Management Measures
The implementation of the majority of the demand management measures are administered by WMWD for its member agencies which includes the City. WMWD offers a variety of financial incentives and rebate programs. WMWD currently offers a variety of rebates through its Water Conservation Rebate Program to promote the retrofitting of residential plumbing fixtures.

Presently, on-going rebates are available for ultra-low flow toilets, low-flow shower heads, rain barrels, high-efficiency clothes washers, automatic sprinkler timers, hose bib manual timers, and insulated hot water blankets through an application and reimbursement system, and a turf replacement program when funds are available.

The City’s Building Code requires that all new residential and commercial construction and major remodels or renovation of existing homes install low flow plumbing fixtures and fittings, including low flow toilets and showerheads.

9.2 Reporting Implementation

9.2.1 Implementation over the Past Five Years
Water Code Section 10631
(e) Provide a description of the supplier’s water demand management measures. This description shall include all of the following:
(1)(A) For an urban retail water supplier, …a narrative description that addresses the nature and extent of each water demand management measure implemented over the past five years.

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The nature and extent of DMM implementation over the past five years was addressed in the individual sections describing each DMM above.

9.2.2 Implementation to Achieve Water Use Targets
The City utilizes strategic planning, capital improvement planning, water, wastewater, recycled water master planning and coordination with regional stakeholders to achieve its water use targets. These practices have been discussed throughout this document.

9.3 Water Use Objectives (Future Requirements)
The Water Code requires that Suppliers develop new water use objectives that are based on specific standards for certain water use sectors. Beginning in 2023, Urban water suppliers are required to calculate and report their annual urban water use objective (WUO), submit validated water audits annually, and to implement and report BMP performance measures. These water use objectives (WUO) will use the aggregate estimated efficient indoor residential water use, aggregate estimated efficient outdoor residential water use, aggregate estimated efficient outdoor irrigation landscape areas with dedicated irrigation meters or equivalent technology, aggregate estimated efficient water losses, aggregate estimated water use for variances approved by the State Water Board and allowable potable reuse water bonus incentive adjustments.

Water Code Section 10631
(e)(1)(A) For an urban retail water supplier, as defined in Section 10608.12, a narrative description that addresses the nature and extent of each water demand management measure implemented over the past five years. The narrative shall describe the water demand management measure that the supplier plans to implement to achieve its water use targets pursuant to Section 10608.20.

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CHAPTER 10

PLAN ADOPTION, SUBMITTAL, AND IMPLEMENTATION
This chapter discusses the UWMP adoption, submittal, and implementation process. It is organized in accordance with the 2025 UWMP Guidebook sections and requirements to assist DWR in its review.

10.1 Inclusion of All 2025 Data
Data provided in this UWMP reflects fiscal years ending June 30 or each year. Data utilized is current through the end of the last full year – June 30, 2025.

10.2 Notice of Public Hearing
To provide the public opportunities to participate in the UWMP process, the City provided notification of the preparation of the updated document and public noticing of the public hearing, as described here. These steps were consistent with all California Water Code requirements for notification of availability of this document in its draft and final forms.

10.2.1 Notice to Cities and Counties
During the preparation of this UWMP, the City notified regional water suppliers and cities that provide water of its UWMP preparation and public hearing date, 60 days prior to the public hearing. The public hearing was held June 3, 2026 at the regular City Council meeting. A draft version of the UWMP was made available on the City’s website approximately two weeks prior to the public hearing for review and comment. Notifications included the time and place of the public hearing.

Table 10-1 provides a list of the water agencies and cities that received the 60 day notice as well as the public hearing notification. The City notified the Jurupa Community Services District, City of Corona, Western Municipal Water District, City of Riverside, and Chino Basin Desalter Authority.

Water Code Section 10621
(b) Every urban water supplier required to prepare a plan shall…at least 60 days prior to the public hearing on the plan…notify any city or county within which the supplier provides waters supplies that the urban water supplier will be reviewing the plan and considering amendments or changes to the plan.

Water Code Section 10642
…The urban water supplier shall provide notice of the time and place of a hearing to any city or county within which the supplier provides water supplies. Notices by a local public agency pursuant to this section shall be provided pursuant to Chapter 17.5 (commencing with Section 7290) of Division 7 of Title 1 of the Government Code. A privately owned water supplier shall provide an equivalent notice within its service area…

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Table 10-1 Retail: Notification to Cities and Counties

10.2.2 Notice to the Public
Water Code Section 10642
…Prior to adopting either [the plan or water shortage contingency plan], the urban water supplier shall make both the plan and the water shortage contingency plan available for public inspection and shall hold a public hearing or hearings thereon. Prior to any of these hearings, notice of the time and place of the hearing shall be published within the jurisdiction of the publicly owned water supplier pursuant to Section 6066 of the Government Code [see below]. The urban water supplier shall provide notice of the time and place of a hearing to any city or county within which the supplier provides water supplies.

Government Code section 6066
Publication of notice pursuant to this section shall be once a week for two successive weeks. Two publications in a newspaper published once a week or oftener, with at least five days intervening between the respective publication dates not counting such publication dates, are sufficient. The period of notice commences upon the first day of publication and terminates at the end of the fourteenth day, including therein the first day.

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10.3 Public Hearing and Adoption
The City encouraged public participation in the UWMP development process through the noticing of the public hearing and by encouraging the review of the draft document. Availability of the draft UWMP and a legal notice of the public hearing was provided prior to the June 3, 2026 public hearing at a regular scheduled City Council meeting. The public hearing notice provided the time and place of the hearing as well as the location where the UWMP was available for public review (Norco City Hall) during normal business hours. This notice was published in a local newspaper once a week for two consecutive weeks with at least five days between each notice.

10.3.1 Adoption
The public hearing was held at a regular City Council meeting on June 3, 2026 at 7:00 p.m. located at the City of Norco City Council chambers. The adoption of the plan occurred following the public hearing. Documentation of the letters notifying the public and agencies, along with public notices of the hearing encouraging the involvement of the general public, letters of correspondence and the adoption resolution are included in Appendix B.

Water Code Section 10642
…Prior to adopting either, the [plan or water shortage contingency plan], the urban water supplier shall make both the plan and the water shortage contingency plan available for public inspection and shall hold a public hearing or hearings thereon.

Water Code Section 10608.26
(a) In complying with this part, an urban retail water supplier shall conduct at least one public hearing to accomplish all of the following:
(1) Allow community input regarding the urban retail water supplier’s implementation plan for complying with this part.
(2) Consider the economic impacts of the urban retail water supplier’s implementation plan for complying with this part.
(3) Adopt a method, pursuant to subdivision (b) of Section 10608.20 for determining its urban water use target.

Water Code Section 10642
…After the hearing or hearings, the plan or water shortage contingency plan shall be adopted as prepared or as modified after the hearing or hearings.

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Water Code Section 10621
(e) Each urban water supplier shall update and submit its 2025 plan to the department by July 1, 2026…
Water Code Section 10644
(a)(1) An urban water supplier shall submit to the department, the California State Library, and any city or county within which the supplier provides water supplies a copy of its plan no later than 30 days after adoption.

Water Code Section 10635
(c) The urban water supplier shall provide that portion of its urban water management plan prepared pursuant to this article to any city or county within which it provides water supplies no later than 60 days after the submission of its urban water management plan.

10.4 Plan Submittal

10.4.1 Electronic Data Submittal
The draft UWMP was made available for public review before the public hearing; the adopted plan was made available for public review during normal business hours for at least 30 days following adoption. The adoption resolution is provided in Appendix G. The final 2025 UWMP was provided electronically to DWR, California State Library, the water agencies and cities listed in Table 10-1. The report was provided within 30 days after adoption by July 1, 2026.

DWR received the adopted UWMP text and the data tables electronically through the WUE data online submittal tool that DWR developed.

10.5 Public Availability
Water Code Section 10645
Not later than 30 days after filing a copy of its plan with the department, the urban water supplier and the department shall make the plan available for public review during normal business hours.

Not later than 30 days after filing a copy of its water shortage contingency plan with the department, the urban water supplier and the department shall make the plan available for public review during normal business hours.

Water Code Section 10644 (a)(2)
The plan, or amendments to the plan, submitted to the department … shall be submitted electronically and shall include any standardized forms, tables, or displays specified by the department.

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10.6 Notification to Public Utilities Commission
The City of Norco complies with the filings required by the Public Utilities Commission.

10.7 Amending an Adopted UWMP or Water Shortage Contingency Plan If required, The City of Norco will submit amendments to the UWMP.

10.7.1 Amending a Water Shortage Contingency Plan
If required, The City of Norco will submit amendments to the WSCP.

Water Code Section 10621
(d) The amendments to, or changes in, the plan shall be adopted and filed in the manner set forth in Article 3 (commencing with Section 10640).

Water Code Section 10644
(a)(1) Copies of amendments or changes to the plans shall be submitted to the department, the California State Library, and any city or county within which the supplier provides water supplies within 30 days after adoption.

Water Code Section 10644 (b)
If an urban water supplier revises its water shortage contingency plan, the supplier shall submit to the department a copy of its water shortage contingency plan prepared…no later than 30 days after adoption, in accordance with protocolsforsubmission and using electronic reporting tools developed by the department.

Water Code Section 10621 (c)
An urban water supplier regulated by the Public Utilities Commission shall include its most recent plan and water shortage contingency plan as part of the supplier’s general rate case filings.

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APPENDIX A

URBAN WATER MANAGEMENT PLAN CHECKLIST

Retail
(x = required)
Wholesale
(x = required) Order 2025 Guidebook Location Water Code Section Summary as Applies to UWMP Subject Relevant Submittal Table 2025 UWMP Location x x 1 Chapter 1 10615 A plan shall describe and evaluate sources of supply, reasonable and practical efficient uses, reclamation and demand management activities. Introduction and overview n/a Section 1.1 x x 1 Chapter 1 10630.5
Each plan shall include a simple description of the Supplier’s plan including water availability, future requirements, a strategy for meeting needs, and other pertinent information. Additionally, a Supplier may also choose to include a simple description at the beginning of each chapter.

Plan preparation n/a Executive Summary
x x 2.1 Section 2.1 10620(b) Every person that becomes a Supplier shall adopt UWMP within one year after it has become a Supplier. Plan preparation n/a Section 2.1 x n/a 2.5 Section 2.5 10644 Supplier shall report the Public Water Systems number, volume of delivered water, and number of connections that are included in this UWMP. Plan preparation 2-1 Section 2.1 x x 2.5 Section 2.5 10644 Supplier shall report if this UWMP is an individual UWMP and whether the Supplier belongs to a regional UWMP or regional alliance. Plan preparation 2-2 Section 2.2 x x 2.5 Section 2.5 10644 Supplier shall report whether the data is in fiscal or calendar years and the units of measure used for reporting water volumes. Plan preparation 2-3 Section 2.3 x x 2.4 Section 2.4 10642
Provide supporting documentation that the Supplier has encouraged active involvement of diverse social, cultural, and economic elements of the population within the service area prior to and during the preparation of the plan and contingency plan.

Plan preparation n/a Section 2.4
x x 2.4 Section 2.4.2 10620(d)(3)
Coordinate the preparation of its plan with other appropriate agencies in the area, including other Suppliers that share a common source, water management agencies, and relevant public agencies, to the extent practicable.

Plan preparation n/a Section 2.4.2
x n/a 2.4 Section 2.4.1 10631(h) Retail Suppliers will include documentation that they have provided their Wholesale Supplier(s)—if any—with water use projections from that source. Plan preparation 2-4 R   Section 2.4.1 n/a x 2.4 Section 2.4.1 10631(h)
Wholesale Suppliers will provide their Suppliers with identification and quantification of the existing and planned sources of water available from the Wholesale Supplier to the Supplier during various water year types.

Plan preparation 2-4 W n/a
x x 3 Chapter 3.0 10631(a) Describe the Supplier service area. System description n/a Section 3.2 x x 3.3 Section 3.3 10631(a) Describe the climate of the Supplier’s service area. System description n/a Section 3.3 x x 3.4 Section 3.4.1 10631(a) Provide the current and projected service area populations for 2030, 2035, 2040, 2045 and optionally 2050. System description 3-1 Section 3.4
x x 3.4 Section 3.4.2 10631(a) Describe other social, economic, and demographic factors affecting the Supplier’s water management planning. System description n/a Section 3.4.1
x x 3.5 Section 3.5 10631(a)
Describe the land uses within the service area… include the current and projected land uses within the existing or anticipated service area affecting the Supplier’s water management planning. Describe the land uses within the service area.

System description and baselines n/a Section 3.5
x Optional 4.2 Sections 4.2.3 and 4.2.4 10631(d)(1) Quantify past, current, and projected water use, identifying the uses among water use sectors. System water use 4-1 and 4-2 Section 4.2 x Optional 4.3 Section 4.3.1 10631(d)(3)(A) Report the distribution system water loss for each of the five years preceding the plan update. System water use 4-5 Section 4.3 x n/a 4.3 Section 4.3.2 10631(d)(3)(C) Retail Suppliers shall provide data to show the distribution loss standards were met. System water use 4-6 Section 4.3.1 x n/a 4.2 Section 4.2.5.4 10631.1(a) Include projected water use needed for lower income housing projected in the service area of the Supplier. System water use 4-3 Section 4.4
x n/a 4.2 Section 4.2.5.3 10631(d)(4)(A) In projected water use, include estimates of water savings from adopted codes, plans, and other policies or laws. System water use 4-3 Section 4.2.5
x n/a 4.2 Section 4.2.5.3 10631(d)(4)(B) Provide citations of codes, standards, ordinances, or plans used to make water use projections. System water use 4-3 Section 4.2.5 x n/a 4.2 Section 4.2.5.3 10631(d)(4)(B)(ii)
To the extent that a Supplier reports the information described in subparagraph (A), an urban water Supplier shall… Indicate the extent that the water use projections consider savings from codes, standards, ordinances, or transportation and land use plans. Water use projections that do not account for these water savings shall be noted of that fact.

System water use 4-3 Section 4.2.5
x x 4.2 Section 4.2.5.6 10635(b) Demands under climate change considerations must be included as part of the drought risk assessment. System water use n/a Section 4.5 n/a x 5.1 Section 5.1 10608.36 Wholesale Suppliers shall include an assessment of present and proposed future measures, programs, and policies to help their Retail Suppliers achieve targeted water use reductions. Baselines and targets n/a n/a x n/a 5.2 Section 5.2 10608.4
Retail Suppliers shall report on their compliance in meeting their water use targets. Reporting requirements will vary depending on whether the Supplier:
-    Was considered an urban retail water supplier in 2020, -    Met its 2020 target in 2020, or
-    Was part of a merger or consolidation since 2020.

Chapter 5 Subsections 5.2.1, 5.2.2, and 5.2.3 address each of these situations.

Baselines and targets 5-1 Section 5.4
x x 6.1 Section 6.1 10631(b)(2) When multiple sources of water supply are identified, describe the management of each supply in relationship to other identified supplies. System supplies n/a Section 6.1 x x 6.1 Sections 6.1 and 6.2 10631(b)(1)
Provide a discussion of anticipated supply availability under a normal, single dry year, and a drought lasting five years, as well as more frequent and severe periods of drought, including changes in supply due to climate change.

System supplies n/a Section 6.2.2
x x 6.2 Section 6.2.2 10631(b)(4)(C)
Indicate whether groundwater is an existing or planned source of water available to the Supplier. If groundwater is identified as an existing or planned source of water… (include) a detailed description and analysis of the location, amount and sufficiency of groundwater pumped by the Supplier for the past five years.

Water supplies and recycled water 6-1 Section 6.2.4
x x 6.2 Section 6.2.2 10631(b)(4)(A)
Indicate whether a groundwater sustainability plan or groundwater management plan has been adopted by the Supplier or if there is any other specific authorization for groundwater management. Include a copy of the plan or authorization.

System supplies n/a Section 6.2.2
x x 6.2 Section 6.2.2 10631(b)(4)(B) Describe the groundwater basin. System supplies n/a Section 6.2.1 x x 6.2 Section 6.2.2 10631(b)(4)(B) Indicate if the basin has been adjudicated and include a copy of the court order or decree and a description of the amount of water the Supplier has the legal right to pump. System supplies n/a Section 6.2.2 x x 6.2 Section 6.2.2 10631(b)(4)(B) For unadjudicated basins… (include) information as to whether DWR has identified the basin as a high- or medium-priority basin in the most current official departmental bulletin… Water supplies and recycled water n/a Section 6.2.2 x x 6.2 Section 6.2.2 10631(b)(4)(B) For unadjudicated basins… describe efforts by the Supplier to coordinate with sustainability or groundwater agencies to achieve sustainable groundwater conditions. Water supplies and recycled water n/a Section 6.2.2 x x 6.2 Section 6.2.2. 10631(b)(4)(C)
If groundwater is identified as an existing or planned source of water… (include) a detailed description and analysis of the location, amount and sufficiency of groundwater pumped by the Supplier for the past five years.

System supplies n/a Section 6.2.4

x
x 6.2 Section 6.2.2 10631(b)(4)(D) Provide a detailed description and analysis of the amount and location of groundwater that is projected to be pumped. System supplies 6-9 Section 6.2.18
xx 6.1 Section 6.1 10631(b) Identify and quantify the existing and planned sources of water available for 2025, 2030, 2035, 2040, 2045 and optionally 2050. System supplies 6-8 and 6-9 Section 6.2.18 xx 6.2 Section 6.2.7 10631(c) Describe the opportunities for exchanges or transfers of water on a short-term or long-term basis. System supplies n/a Section 6.2.15 x n/a 6.2 Section 6.2.5 10633(a) Describe the wastewater collection and treatment systems in the Supplier’s service area with quantified amount of collection and treatment and the disposal methods. System supplies (recycled water) 6-2 Section 6.2.9 xx 6.2 Section 6.2.5 10633(b) Describe the quantity of treated wastewater that meets recycled water standards, is being discharged, and is otherwise available for use in a recycled water project. System supplies (recycled water) 6-3 Section 6.2.7 xx 6.2 Section 6.2.5 10633(c) Describe the recycled water currently being used in the Supplier's service area. System supplies (recycled water) 6-4 Section 6.2.7, 6.2.10 xx 6.2 Section 6.2.5 10633(d) Describe and quantify the potential uses of recycled water and provide a determination of the technical and economic feasibility of those uses. System supplies (recycled water) 6-4 Section 6.2.7 xx 6.2 Section 6.2.5 10633(e) Describe the projected use of recycled water within the Supplier's service area at the end of 5, 10, 15, and 20 years, and describe the actual use of recycled water in comparison to uses previously projected. System supplies (recycled water) 6-4 and 6-5 Section 6.2.11 xx 6.2 Section 6.2.5 10633(f) Describe the actions that may be taken to encourage the use of recycled water and the projected results of these actions in terms of acre-feet of recycled water used per year. System supplies (recycled water) 6-6 Section 6.2.13 xx 6.2 Section 6.2.5 10633(g) Provide a plan for optimizing the use of recycled water in the Supplier's service area. System supplies (recycled water) n/a Section 6.2.13 xx 6.2 Section 6.2.6 10631(g) Describe desalinated water project opportunities for long-term supply. System supplies 6-7 Section 6.2.14 xx 6.2 Section 6.2.10 10631(f)
Describe the expected future water supply projects and programs that may be undertaken by the water Supplier to address water supply reliability in average, single-dry, and for a period of drought lasting five consecutive water years.

System supplies 6-7 Section 6.2.17
xx 6.3 Section 6.3 and Appendix O 10631.2(a) The UWMP must include energy information, as stated in the code, that a Supplier can readily obtain. System suppliers, energy intensity O-1A, O-1B, O-1C, and O-2 Section 6.3
x 7.1 Section 7.1 10634 Provide information on the quality of existing sources of water available to the Supplier and the manner in which water quality affects water management strategies and supply reliability.

Water supply reliability
assessment n/a Section 7.1
xx 7.2 Section 7.2 10635(a)
Service Reliability Assessment: Assess the water supply reliability during normal, dry, and a drought lasting five consecutive water years by comparing the total water supply sources available to the Supplier with the total projected water use over the next 20 years.

Water supply reliability
assessment 7-2, 7-3, and 7-4 Section 7.2.3
xx 7.2 Section 7.2.3 10620(f) Describe water management tools and options to maximize resources and minimize the need to import water from other regions.

Water supply reliability
assessment n/a Section 7.2.4
xx 7.3 Section 7.3 10635(b) Provide a drought risk assessment as part of information considered in developing the demand management measures and water supply projects.

Water supply reliability
assessment n/a Section 7.3
xx 7.3 Section 7.3 10635(b)(1)
Include a description of the data, methodology, and basis for one or more supply shortage conditions that are necessary to conduct a drought risk assessment for a drought period that lasts five consecutive years.

Water supply reliability
assessment n/a Section 7.3.1
xx 7.3 Section 7.3 10635(b)(2) Include a determination of the reliability of each source of supply under a variety of water shortage conditions.

Water supply reliability
assessment n/a Section 7.3.2
xx 7.3 Section 7.3 10635(b)(3) Include a comparison of the total water supply sources available to the Supplier with the total projected water use for the drought period.

Water supply reliability
assessment 7-5 Section 7.3
xx 7.3 Section 7.3 10635(b)(4)
Include considerations of the historical drought hydrology, plausible changes on projected supplies and demands under climate change conditions, anticipated regulatory changes, and other locally applicable criteria.

Water supply reliability
assessment n/a Section 7.3
xx8 Chapter 8 10632(a) Provide a water shortage contingency plan (WSCP) with specified elements below. Water shortage contingency planning n/a Chapter 8
xx8 Chapter 8 10632(a)(1) Provide an analysis of water supply reliability (from Guidebook Chapter 7) in the WSCP. Water shortage contingency planning n/a Serction 8.1
xx 8.2 Section 8.2 10632(a)(2)(A) Provide the written decision-making process and other methods that the Supplier will use each year to determine its water reliability.

Water shortage contingency
planning n/a Section 8.2
xx 8.2 Section 8.2 10632(a)(2)(B) Provide data and methodology to evaluate the Supplier’s water reliability for the current year and one dry year pursuant to factors in the code.

Water shortage contingency
planning n/a Section 8.1, 8.2
xx 8.3 Section 8.3 10632(a)(3)(A)
Define six standard water shortage levels of 10%, 20%, 30%, 40%, 50% shortage, and greater than 50% shortage. These levels shall be based on supply conditions, including percent reductions in supply, changes in groundwater levels, changes in surface elevation, or other conditions. The shortage levels shall also apply to a catastrophic interruption of supply.

Water shortage contingency
planning n/a Section 8.3
xx 8.3 Section 8.3 10632(a)(3)(B) Suppliers with an existing WSCP that uses different water shortage levels must cross reference their categories with the six standard categories.

Water shortage contingency
planning 8-1 Section 8.3
xx 8.4 Section 8.4 10632(a)(4)(A) Suppliers with WSCPs that align with the defined shortage levels must specify locally appropriate supply augmentation actions.

Water shortage contingency
planning 8-2 Section 8.4.1
xx 8.4 Section 8.4 10632(a)(4)(B) Specify locally appropriate demand reduction actions to adequately respond to shortages. Water shortage contingency planning 8-3 Section 8.4.2
xx 8.4 Section 8.4 10632(a)(4)(C) Specify locally appropriate operational changes. Water shortage contingency planning 8-2 Section 8.4.3
xx 8.4 Section 8.4 10632(a)(4)(D) Specify additional mandatory prohibitions against specific water use practices that are in addition to Statemandated prohibitions are appropriate to local conditions.

Water shortage contingency
planning Table 8-3 Section 8.4.4
xx 8.4 Section 8.4 10632(a)(4)(E) Estimate the extent to which the gap between supplies and demand will be reduced by implementation of the action.

Water shortage contingency
planning 8-2 and 8-3 Section 8.4
xx 8.4 Section 8.4.6 10632.5 The UWMP shall include a seismic risk assessment and mitigation plan. Water shortage contingency plan n/a Section 8.4.6 xx 8.5 Section 8.5 10632(a)(5)(A) Suppliers must describe that they will inform customers, the public and others regarding any current or predicted water shortages.

Water shortage contingency
planning n/a Section 8.5
xx 8.5 Section 8.5 10632(a)(5)(B),
10632(a)(5)(C)
Suppliers must describe that they will inform customers, the public and others regarding any shortage response actions triggered or anticipated to be triggered and other relevant communications.

Water shortage contingency
planning n/a Section 8.5
x n/a 8.6 Section 8.6 10632(a)(6) Retail Supplier must describe how it will ensure compliance with and enforce provisions of the WSCP. Water shortage contingency planning n/a Section 8.6
xx 8.7 Section 8.7 10632(a)(7)(A) Describe the legal authority that empowers the Supplier to enforce shortage response actions. Water shortage contingency planning n/a Section 8.7
xx 8.7 Section 8.7 10632(a)(7)(B) Provide a statement that the Supplier will declare a water shortage emergency per Water Code Chapter 3. Water Shortage Emergencies.

Water shortage contingency
planning n/a Section 8.7

x
x 8.7 Section 8.7 10632(a)(7)(C) Provide a statement that the Supplier will coordinate with any city or county within which it provides water for the possible proclamation of a local emergency.

Water shortage contingency
planning n/a Section 8.5
xx 8.8 Section 8.8 10632(a)(8)(A) Describe the potential revenue reductions and expense increases associated with activated shortage response actions.

Water shortage contingency
planning n/a Section 8.8
xx 8.8 Section 8.8 10632(a)(8)(B) Provide a description of mitigation actions needed to address revenue reductions and expense increases associated with activated shortage response actions.

Water shortage contingency
planning n/a Section 8.8
x n/a 8.8 Section 8.8 10632(a)(8)(C) Retail Suppliers must describe the cost of compliance with Water Code Chapter 3.3, Excessive Residential Water Use During Drought.

Water shortage contingency
planning n/a Section 8.8
x n/a 8.9 Section 8.9 10632(a)(9) Retail Suppliers must describe the monitoring and reporting requirements and procedures that ensure appropriate data are collected, tracked, and analyzed for purposes of monitoring customer compliance.

Water shortage contingency
planning n/a Section 8.9
xx 8.10 Section 8.10 10632(a)(10) Describe reevaluation and improvement procedures for monitoring and evaluation the WSCP to ensure risk tolerance is adequate and appropriate water shortage mitigation strategies are implemented.

Water shortage contingency
planning n/a Section 8.10
x n/a 8.11 Section 8.11 10632(b) Analyze and define water features that are artificially supplied with water, including ponds, lakes, waterfalls, and fountains, separately from swimming pools and spas.

Water shortage contingency
planning n/a Section 8.11
xx 8.12 Section 8.12 10632(c) Make available the WSCP to customers and any city or county where it provides water within 30 days after adoption of the plan.

Water shortage contingency
planning n/a Section 8.12
x n/a 9.1 Sections 9.1 10631(e)(1)
Retail Suppliers shall provide a description of the nature and extent of each demand management measure implemented over the past five years. The description will address specific measures listed in code.

Demand management measures n/a Chapter 9
n/ax 9.2 Sections 9.2 10631(e)(2) Wholesale Suppliers shall describe specific demand management measures listed in code, their distribution system asset management program, and Supplier assistance program. Demand management measures n/a n/a x n/a 10 Chapter 10 10608.26(a) Retail Suppliers shall conduct a public hearing to discuss adoption, implementation, and economic impact of water use targets (recommended to discuss compliance).

Plan adoption, submittal, and
implementation n/a Section 10.2
xx 10.2 Section 10.2.1 10621(b) Notify, at least 60 days prior to the public hearing, any city or county within which the Supplier provides water that the Supplier will be reviewing the UWMP and considering amendments or changes to the plan.

Plan adoption, submittal, and
implementation 10-1 Section 10.2.1
xx 10.4 Section 10.4 10621(f) Each urban water Supplier shall update and submit its 2025 plan   to DWR by July 1, 202  6. Plan adoption, submittal, and implementation n/a Section 10.4.1
xx 10.2 Sections 10.2.2, 10.3, and 10.5 10642 Provide supporting documentation that the Supplier made the UWMP and WSCP available for public inspection, published notice of the public hearing, and held a public hearing about the UWMP and WSCP.

Plan adoption, submittal, and
implementation n/a Section 10.3
xx 10.2 Section 10.2.2 10642 The Supplier is to provide the time and place of the hearing to any city or county within which the Supplier provides water.

Plan adoption, submittal, and
implementation 10-1 Section 10.2.2
xx 10.3 Section 10.3.2 10642 Provide supporting documentation that the UWMP and WSCP has been adopted as prepared or modified. Plan adoption, submittal, and implementation n/a Section 10.3
xx 10.4 Section 10.4 10644(a) Provide supporting documentation that the Supplier has submitted their UWMP to the California State Library.

Plan adoption, submittal, and
implementation n/a Section 10.4.1
xx 10.4 Section 10.4 10644(a)(1) Provide supporting documentation that the Supplier has submitted their UWMP to any city or county within which the Supplier provides water no later than 30 days after adoption.

Plan adoption, submittal, and
implementation n/a Section 10.5
xx 10.4 Sections 10.4.1 and 10.4.2 10644(a)(2) The UWMP, or amendments to the UWMP, submitted to DWR shall be submitted electronically. Plan adoption, submittal, and implementation n/a Section 10.4.1
xx 10.7 Section 10.7.2 10644(b) If revised, submit a copy of the WSCP to DWR within 30 days of adoption. Plan adoption, submittal, and implementation n/a Section 10.7
xx 10.5 Section 10.5 10645(a) Provide supporting documentation that, not later than 30 days after filing a copy of its UWMP with DWR, the Supplier has or will make the plan available for public review during normal business hours.

Plan adoption, submittal, and
implementation n/a Section 10.5
xx 10.5 Section 10.5 10645(b) Provide supporting documentation that, not later than 30 days after filing a copy of its WSCP with DWR, the Supplier has or will make the plan available for public review during normal business hours.

Plan adoption, submittal, and
implementation n/a Section 10.5
xx 10.6 Section 10.6 10621(c) If Supplier is regulated by the Public Utilities Commission, include its plan and contingency plan as part of its general rate case filings.

Plan adoption, submittal, and
implementation n/a Section 10.6

Urban Water Management
Plan
City of Norco

APPENDIX B

NOTIFICATION LETTERS

CITY OF NORCO

PUBLIC HEARING NOTICE
2025 URBAN WATER MANAGEMENT PLAN
March 24, 2026
Thomas O’Neill - General Manager/CEO
Chino Basin Desalter Authority
3550 E. Philadelphia Street, Suite 170
Ontario, CA 91761
Subject: City of Norco 2025 Urban Water Management Plan Update The City of Norco is in the process of preparing their Urban Water Management Plan. The California Water Code requires urban water suppliers within the state of California to prepare and adopt Urban Water Management Plans (UWMPs) for submission to the California Department of Water Resources (DWR). The UWMPs, which must be filed every five (5) years, must satisfy the requirements of the Urban Water Management Planning Act (UWMPA) of 1983 including amendments that have been made to the Act. The UWMPA requires urban water suppliers servicing 3,000 or more connections, or supplying more than 3,000 acre-feet (aft) of water annually, to prepare an UWMP.

A public hearing is scheduled for June 3, 2026 at 7:00 pm in the Norco City Council Chambers, 2820 Clark Avenue, Norco, CA 92860. All interested parties are invited to attend the public hearing and provide comments regarding the Draft 2025 UWMP. The draft plan will be available at least two weeks prior to the scheduled public hearing on the City's web site (http://www.norco.ca.us) and at City Hall located at 2870 Clark Avenue, Norco, CA 92860. The final UWMP will be submitted to the DWR after adoption.

If you have any input for the matters contained in this notice letter, require additional information, or would like to set up a meeting to discuss these issues, please contact me at (951) 270-5677 or by email at [email protected].

Respectfully,
Sam Nelson
Public Works Director
City of Norco

CITY OF NORCO

PUBLIC HEARING NOTICE
2025 URBAN WATER MANAGEMENT PLAN
March 24, 2026
Tom Moody - General Manager
City of Corona
755 Public Safety Way
Corona, CA 92880
Subject: City of Norco 2025 Urban Water Management Plan Update The City of Norco is in the process of preparing their Urban Water Management Plan. The California Water Code requires urban water suppliers within the state of California to prepare and adopt Urban Water Management Plans (UWMPs) for submission to the California Department of Water Resources (DWR). The UWMPs, which must be filed every five (5) years, must satisfy the requirements of the Urban Water Management Planning Act (UWMPA) of 1983 including amendments that have been made to the Act. The UWMPA requires urban water suppliers servicing 3,000 or more connections, or supplying more than 3,000 acre-feet (aft) of water annually, to prepare an UWMP.

A public hearing is scheduled for June 3, 2026 at 7:00 pm in the Norco City Council Chambers, 2820 Clark Avenue, Norco, CA 92860. All interested parties are invited to attend the public hearing and provide comments regarding the Draft 2025 UWMP. The draft plan will be available at least two weeks prior to the scheduled public hearing on the City's web site (http://www.norco.ca.us) and at City Hall located at 2870 Clark Avenue, Norco, CA 92860. The final UWMP will be submitted to the DWR after adoption.

If you have any input for the matters contained in this notice letter, require additional information, or would like to set up a meeting to discuss these issues, please contact me at (951) 270-5677 or by email at [email protected].

Respectfully,
Sam Nelson
Public Works Director
City of Norco

CITY OF NORCO

PUBLIC HEARING NOTICE
2025 URBAN WATER MANAGEMENT PLAN
March 24, 2026
Chris Berch - General Manager
Jurupa Community Services District
11201 Harrel Street
Jurupa Valley, CA 91752
Subject: City of Norco 2025 Urban Water Management Plan Update The City of Norco is in the process of preparing their Urban Water Management Plan. The California Water Code requires urban water suppliers within the state of California to prepare and adopt Urban Water Management Plans (UWMPs) for submission to the California Department of Water Resources (DWR). The UWMPs, which must be filed every five (5) years, must satisfy the requirements of the Urban Water Management Planning Act (UWMPA) of 1983 including amendments that have been made to the Act. The UWMPA requires urban water suppliers servicing 3,000 or more connections, or supplying more than 3,000 acre-feet (aft) of water annually, to prepare an UWMP.

A public hearing is scheduled for June 3, 2026 at 7:00 pm in the Norco City Council Chambers, 2820 Clark Avenue, Norco, CA 92860. All interested parties are invited to attend the public hearing and provide comments regarding the Draft 2025 UWMP. The draft plan will be available at least two weeks prior to the scheduled public hearing on the City's web site (http://www.norco.ca.us) and at City Hall located at 2870 Clark Avenue, Norco, CA 92860. The final UWMP will be submitted to the DWR after adoption.

If you have any input for the matters contained in this notice letter, require additional information, or would like to set up a meeting to discuss these issues, please contact me at (951) 270-5677 or by email at [email protected].

Respectfully,
Sam Nelson
Public Works Director
City of Norco

CITY OF NORCO

PUBLIC HEARING NOTICE
2025 URBAN WATER MANAGEMENT PLAN
March 24, 2026
David Garcia - General Manager
Riverside Public Utilities
3750 University Avenue, 3rd Floor
Riverside, CA 92501
Subject: City of Norco 2025 Urban Water Management Plan Update The City of Norco is in the process of preparing their Urban Water Management Plan. The California Water Code requires urban water suppliers within the state of California to prepare and adopt Urban Water Management Plans (UWMPs) for submission to the California Department of Water Resources (DWR). The UWMPs, which must be filed every five (5) years, must satisfy the requirements of the Urban Water Management Planning Act (UWMPA) of 1983 including amendments that have been made to the Act. The UWMPA requires urban water suppliers servicing 3,000 or more connections, or supplying more than 3,000 acre-feet (aft) of water annually, to prepare an UWMP.

A public hearing is scheduled for June 3, 2026 at 7:00 pm in the Norco City Council Chambers, 2820 Clark Avenue, Norco, CA 92860. All interested parties are invited to attend the public hearing and provide comments regarding the Draft 2025 UWMP. The draft plan will be available at least two weeks prior to the scheduled public hearing on the City's web site (http://www.norco.ca.us) and at City Hall located at 2870 Clark Avenue, Norco, CA 92860. The final UWMP will be submitted to the DWR after adoption.

If you have any input for the matters contained in this notice letter, require additional information, or would like to set up a meeting to discuss these issues, please contact me at (951) 270-5677 or by email at [email protected].

Respectfully,
Sam Nelson
Public Works Director
City of Norco

CITY OF NORCO

PUBLIC HEARING NOTICE
2025 URBAN WATER MANAGEMENT PLAN
March 24, 2026
Craig Miller - General Manager
Western Municipal Water District
14205 Meridian Pkwy.

Riverside, CA 92508
Subject: City of Norco 2025 Urban Water Management Plan Update The City of Norco is in the process of preparing their Urban Water Management Plan. The California Water Code requires urban water suppliers within the state of California to prepare and adopt Urban Water Management Plans (UWMPs) for submission to the California Department of Water Resources (DWR). The UWMPs, which must be filed every five (5) years, must satisfy the requirements of the Urban Water Management Planning Act (UWMPA) of 1983 including amendments that have been made to the Act. The UWMPA requires urban water suppliers servicing 3,000 or more connections, or supplying more than 3,000 acre-feet (aft) of water annually, to prepare an UWMP.

A public hearing is scheduled for June 3, 2026 at 7:00 pm in the Norco City Council Chambers, 2820 Clark Avenue, Norco, CA 92860. All interested parties are invited to attend the public hearing and provide comments regarding the Draft 2025 UWMP. The draft plan will be available at least two weeks prior to the scheduled public hearing on the City's web site (http://www.norco.ca.us) and at City Hall located at 2870 Clark Avenue, Norco, CA 92860. The final UWMP will be submitted to the DWR after adoption.

If you have any input for the matters contained in this notice letter, require additional information, or would like to set up a meeting to discuss these issues, please contact me at (951) 270-5677 or by email at [email protected].

Respectfully,
Sam Nelson
Public Works Director
City of Norco

Urban Water Management
Plan
City of Norco

APPENDIX C

CLIMATE CHANGE VULNERABILITY ASSESSMENT

Urban Water Management
Plan
City of Norco

CLIMATE CHANGE VULNERABILITY ASSESSMENT
The Climate Change Vulnerability Assessment is taken from the Climate Change Handbook for Regional Water Planning, USEPA and DWR, 2011. The vulnerability assessment highlights those water-related resources that are important to a region and are sensitive to climate change.

I. Water Demand
Are there major industries that require cooling/process water in your planning region? Response: No
Does water use vary by more than 50% seasonally in parts of your region? Response: No
Are crops grown in your region climate-sensitive? Would shifts in daily heat patterns, such as how long heat lingers before night-time cooling, be prohibitive for some crops? Response: No
Do groundwater supplies in your region lack resiliency after drought events? Response: No
Are water use curtailment measures effective in your region? Response: Yes Are some instream flow requirements in your region either currently insufficient to support aquatic life, or occasionally unmet?
Response: No
II. Water Supply
Does a portion of the water supply in your region come from snowmelt? Response: Yes
Does part of your region rely on water diverted from the Delta, imported from the Colorado River, or imported from other climate-sensitive systems outside your region? Response: Yes
Does part of your region rely on coastal aquifers? Has salt intrusion been a problem in the past?
Response: No
Would your region have difficulty in storing carryover supply surpluses from year to year? Response: No
Has your region faced a drought in the past during which it failed to meet local water demands? Response: No Does your region have invasive species management issues at your facilities, along conveyance structures, or in habitat areas?
Response: No

Urban Water Management
Plan
City of Norco
III. Water Quality
Are increased wildfires a threat in your region? If so, does your region include reservoirs with fire-susceptible vegetation nearby which could pose a water quality concern from increased erosion?
Response: No
Does part of your region rely on surface water bodies with current or recurrent water quality issues related to eutrophication, such as low dissolved oxygen or algal blooms? Are there other water quality constituents potentially exacerbated by climate change? Response: No
Are seasonal low flows decreasing for some waterbodies in your region? If so, are the reduced low flows limiting the waterbodies’ assimilative capacity? Response: No
Are there beneficial uses designated for some water bodies in your region that cannot always be met due to water quality issues?
Response: Yes
Does part of your region currently observe water quality shifts during rain events that impact treatment facility operation?
Response: No
IV. Sea Level Rise
Has coastal erosion already been observed in your region? Response: No
Are there coastal structures, such as levees or breakwaters, in your region? Response: No
Is there significant coastal infrastructure, such as residences, recreation, water and wastewater treatment, tourism, and transportation) at less than six feet above mean sea level in your region?
Response: No
Are there climate-sensitive low-lying coastal habitats in your region? Response: No
Are there areas in your region that currently flood during extreme high tides or storm surges? Response: No Is there land subsidence in the coastal areas of your region? Response: No
Do tidal gauges along the coastal parts of your region show an increase over the past several decades?

Urban Water Management
Plan
City of Norco
Response: No
V. Flooding
Does critical infrastructure in your region lie within the 200-year floodplain? DWR’s best available floodplain maps are available at:
http://www.water.ca.gov/floodmgmt/lrafmo/fmb/fes/best_available_maps/ Response: No
Does part of your region lie within the Sacramento-San Joaquin Drainage District? Response: No
Does aging critical flood protection infrastructure exist in your region? Response: No Have flood control facilities (such as impoundment structures) been insufficient in the past? Response: No
Are wildfires a concern in parts of your region?
Response: No
VI. Ecosystem and Habitat Vulnerability
Does your region include inland or coastal aquatic habitats vulnerable to erosion and sedimentation issues?
Response: No
Does your region include estuarine habitats which rely on seasonal freshwater flow patterns? Response: No
Do climate-sensitive fauna or flora populations live in your region? Response: No
Do endangered or threatened species exist in your region? Are changes in species distribution already being observed in parts of your region?
Response: Yes
Does the region rely on aquatic or water-dependent habitats for recreation or other economic activities?
Response: No
Are there rivers in your region with quantified environmental flow requirements or known water quality/quantity stressors to aquatic life?
Response: No
Do estuaries, coastal dunes, wetlands, marshes, or exposed beaches exist in your region? If so, are coastal storms possible/frequent in your region? Response: No

Urban Water Management
Plan
City of Norco
Does your region include one or more of the habitats described in the Endangered Species Coalition’s Top 10 habitats vulnerable to climate change https://www.endangered.org/campaigns/annual-top-ten-report/its-getting-hot-out-there/ Response: No
Are there areas of fragmented estuarine, aquatic, or wetland wildlife habitat within your region? Are there movement corridors for species to naturally migrate? Are there infrastructure projects planned that might preclude species movement?
Response: No
VII. Hydropower
Is hydropower a source of electricity in your region?
Response: No
Are energy needs in your region expected to increase in the future? If so, are there future plans for hydropower generation facilities or conditions for hydropower generation in your region? Response: Yes; No

Urban Water Management
Plan
City of Norco

APPENDIX D

WATER CONSERVATION AUDIT

Level 1 Validation Summary Notes
Call Information
Utility Validator
Utility Name: City of Norco Validator: Bill Christiansen Utility PWSID: CA3310025
Utility Participants: Jacob Vogenberg, Melody Nguyen, Sam Nelson
Call Date: 12/22/2025
Water Audit Year: CY2024
Audit Input Profile Derivation Comments
Volume from Own
Sources
A total of 5 wells but only 2 contributed to the
audit values for this CY (12 and 13 . All wells
are individually metered. Water from wells
13 and 15 (when operated) flow through an
iron and manganese treatment plant.

There is a treatment plant that wells flow to.

Unsure if there is a finished water meter
after the treatment plant.

SCADA reads from production
meters as archived
Volume from Own
Sources Master Meter
and Supply Error
Adjustment

14.5 MG of storage in distribution system.

Tanks cycle up and down every week. Daily
manual reads are compared against SCADA
reads. Continuously monitored via SCADA.

Other (include details in additional
notes)
Accuracy test for well 13 was 99.1%. No adjustment
made. No test documentation for well 12 but it was
reportedly tested.

This document includes detailed notes about utility practices as reviewed during third-party level-one water audit validation.

This document is not a required submission to the California Department of Water Resources. It is meant to provide background and documentation of the validation process.

Water Audit Validator Certificate from the AWWA
California Nevada Section
Validation Call Notes
Validator
Qualifications:

Audit Input Profile Derivation Comments
Water Imported
Arlington (3 turnout meters), Corona (1
meter), Chino Desalter Authority (CDA) (1
meter), and Riverside (1 meter) connections.

The Arlington (turnouts #1-3), CDA and
Riverside connections were used to import
water in CY2024.

Arlington needs to be broken out into
separate meters for future audits.

Invoices received from exporter
daily; Arlington provided by
WMWD
Norco staff reads the import meters daily. Values
included in the audit are taken directly from the
importer as reported. Testing methods not clearly
indicated on the test repots. Test results for three
Norco turnouts provided (100.3%, 100.2%, 100.1%).

Test results from CDA (listed as Norco Turnout A
tested at 99.7%). CDA connection (Norco Turnout A)
was calibrated in the audit period. The other three
Arlington meters were not.

Water Imported Master
Meter and Supply Error
Adjustment
All import meters tested annually Other (include details in additional notes)
Test results all indicat that meters are performing
within 1% of 100% accurate
Water Exported n/a n/a n/a
Water Exported Master
Meter and Supply Error
Adjustment
n/a n/a n/a
Billed Metered
Authorized
Consumption
Data pulled for billing once a month. Bills are
processed on 4 "routes". All meters are
connected to AMI with Sensus endpoints.

Meters signal hourly data back to the city.

Most meters are Sensus but the
configuration of teh system allows for any
meter manufacturer to be used in the
system.

AMI, but on several billing cycles. Roughly
monthly billing.

Pre-Existing Summary Table of
Monthly Consumption by Bill Date
Proration of consumption not needed as hourly AMI
reads are available
Answered "Yes" to pro-rating. Caculated usage of
meters based on actual consumption time period
using AMI. Used billed consumption data as a check.

Billed Unmetered
Authorized
Consumption
n/a n/a n/a
Unbilled Metered
Authorized
Consumption
n/a n/a n/a

Audit Input Profile Derivation Comments
Unbilled Unmetered
Authorized
Consumption
Flushing (upon complaints), fire department
usage, hydrant maintenance (very low use),
street sweepers
Default value No additional comments.

Unauthorized
Consumption
Default value used Default value No additional comments.

Customer Metering
Inaccuracies
Reactive testing of small and large customer
meters.

In 2024 - Performed a proacive small testing
program. Did 50 small customer meters.

Calculated as simple average
from analysis of test data No additional comments.

Systematic Data
Handling Errors
Default value used Default value No additional comments.

Length of Mains
Length of main + hydrant laterals (see
comments).

Derived Directly from Mains
Inventory (GIS, ledger, etc.)
Hydrant lateral length added during the CY2022
validation meeting: 36196 ft pulled from GIS. Number
of reported mains is consistant with the CY2022 input
Number of Service
Connections
Count of meters, includes inactive. Extracted from Services inventory (GIS, billing system, etc) No additional comments.

Average Operating
Pressure
5 pressure zones. Wells, pump stations,
prvs. Data logged at wells, pump stations,
prvs.

Calculated from field data as a
simple average No additional comments.

Annual Operating Cost
Total operating cost for potable distribution
system. From official financial reports
Customer Retail Unit
Cost
Uniform rate structure.

Used average of the two FY's to create an
average CRUC
Rate structure has only a single
volumetric rate, and this was used
as the input
For the CY2023 audit the following was
discussed...The city charges commercial customers
a volumetric rate for sewer. It was discussed that the
city could use this rate multiplied by the water
supplied to the commercial customers to better
reflect the CRUC value. It was decided that the water
rate was sufficient for the water audit input.

Audit Input Profile Derivation Comments
Variable Production
Cost
Own Source and Purchased Water. VPC
calculated using primary costs of electricity
and purchased water.

Multiple sources of water exist,
and a volume-weighted average
was calculated for all sources
Calculated by staff member who left, derivation
based on previous years' methods. Will revisit
mehtod for next audit.

Urban Water Management
Plan
City of Norco

APPENDIX E
SB X7-7 VERIFICATION FORMS

SB X7-7 Table 0: Units of Measure Used in UWMP (select one from the drop down list)
Acre Feet
DWR NOTES: The unit of measure must be consistent with Submittal Table 2-3
NOTES:

Parameter Value Units
2008 total water deliveries 9,948 Acre Feet
2008 total volume of delivered recycled water - Acre Feet 2008 recycled water as a percent of total deliveries 0% See Note 1 Number of years in baseline period 10 Years
Year beginning baseline period range 2001
Year ending baseline period range 2010
Number of years in baseline period 5 Years
Year beginning baseline period range 2005
Year ending baseline period range 2009

2. The Water Code requires that the baseline period is between 10 and 15 years. However, DWR recognizes that some water suppliers may not have the minimum 10 years of baseline data.

SB X7-7 Table-1: Baseline Period Ranges
DWR NOTES: 1. If the 2008 recycled water delivery is less than 10 percent of total water deliveries, then the 10-15year baseline period is a continuous 10- year period. If the amount of recycled water delivered in 2008 is 10 percent or greater of total deliveries, the 10-15 year baseline period is a continuous 10- to 15-year period.

3. The ending year for the 10-15 year baseline period must be between December 31, 2004 and December 31, 2010.

4. The ending year for the 5 year baseline period must be between December 31, 2007 and December 31, 2010. 5-year
baseline period
Baseline
10- to 15-year
baseline period
NOTES:

NOTES:

SB X7-7 Table 2: Method for Population Estimates
Method Used to Determine Population
(may check more than one)

1. Department of Finance (DOF) or American Community
Survey (ACS)

4. Other
DWR recommends pre-review

2. Persons-per-Connection Method

3. DWR Population Tool

Population
Year 1 2001 24,157
Year 2 2002 24,157
Year 3 2003 24,157
Year 4 2004 24,157
Year 5 2005 24,157
Year 6 2006 24,157
Year 7 2007 24,157
Year 8 2008 24,157
Year 9 2009 24,157
Year 10 2010 27,063
Year 11
Year 12
Year 13
Year 14
Year 15
Year 1 2005 24,157
Year 2 2006 24,157
Year 3 2007 24,157
Year 4 2008 24,157
Year 5 2009 24,157
SB X7-7 Table 3: Service Area Population
10 to 15 Year Baseline Population
5 Year Baseline Population
NOTES:

Year

Acre Feet
Exported
Water
Change in
Dist.

System
Storage
(+/-)
Indirect
Recycled
Water
This column will
remain blank
until SB X7-7
Table 4-B is
completed.

Water
Delivered for
Agricultural
Use
Process
Water
This column
will remain
blank until SB
X7-7 Table 4-
D is
completed.

Annual Gross
Water Use
Year 1 2001 7,568 - - 7,568
Year 2 2002 8,419 - - 8,419
Year 3 2003 8,619 - - 8,619
Year 4 2004 9,669 - - 9,669
Year 5 2005 9,472 - - 9,472
Year 6 2006 9,322 - - 9,322
Year 7 2007 10,488 - - 10,488
Year 8 2008 9,948 - - 9,948
Year 9 2009 9,621 - - 9,621
Year 10 2010 8,627 - - 8,627
Year 11 0 - - - -
Year 12 0 - - - -
Year 13 0 - - - -
Year 14 0 - - - -
Year 15 0 - - - -
9,175
Year 1 2005 9,472 - - 9,472
Year 2 2006 9,322 - - 9,322
Year 3 2007 10,488 - - 10,488
Year 4 2008 9,948 - - 9,948
Year 5 2009 9,621 - - 9,621
9,770
DWR NOTES: Units of measure (AF, MG , or CCF) must remain consistent throughout the UWMP, as reported in Submittal Table 2-3.

NOTES:

SB X7-7 Table 4: Annual Gross Water Use
10 to 15 Year Baseline - Gross Water Use
10 - 15 year baseline average gross water use
5 Year Baseline - Gross Water Use
5 year baseline average gross water use
Baseline Year
Fm SB X7-7 Table 3
Volume Into
Distribution
System
This column
will remain
blank until SB
X7-7 Table 4-A
is completed.

Deductions

Volume Entering
Distribution
System
Meter Error
Adjustment
Optional
(+/-)
Corrected
Volume Entering
Distribution
System
Year 1 2001 4,812 4,812
Year 2 2002 4,462 4,462
Year 3 2003 4,219 4,219
Year 4 2004 4,016 4,016
Year 5 2005 3,588 3,588
Year 6 2006 3,439 3,439
Year 7 2007 3,100 3,100
Year 8 2008 2,363 2,363
Year 9 2009 1,977 1,977
Year 10 2010 1,481 1,481
Year 11 0 -
Year 12 0 -
Year 13 0 -
Year 14 0 -
Year 15 0 -
Year 1 2005 3,588 3,588
Year 2 2006 3,439 3,439
Year 3 2007 3,100 3,100
Year 4 2008 2,363 2,363
Year 5 2009 1,977 1,977
SB X7-7 Table 4-A: Volume Entering the Distribution System(s) Complete one table for each source.
10 to 15 Year Baseline - Water into Distribution System 5 Year Baseline - Water into Distribution System
Name of Source
Baseline Year
Fm SB X7-7 Table 3
DWR NOTES: Units of measure (AF, MG , or CCF) must remain consistent throughout the UWMP, as reported in Submittal Table 2-3.

Meter Error Adjustment - See guidance in Methodology 1, Step 3 of Methodologies Document NOTES:

This water source is:

The supplier's own water source
A purchased or imported source
Temescal Wells

Volume Entering
Distribution
System
Meter Error
Adjustment
Optional
(+/-)
Corrected
Volume Entering
Distribution
System
Year 1 2001 84.4 84
Year 2 2002 93.9 94
Year 3 2003 141.1 141
Year 4 2004 0 0
Year 5 2005 0 0
Year 6 2006 0 0
Year 7 2007 0 0
Year 8 2008 0 0
Year 9 2009 0 0
Year 10 2010 0 0
Year 11 0 0
Year 12 0 0
Year 13 0 0
Year 14 0 0
Year 15 0 0
Year 1 2005 0 0
Year 2 2006 0 0
Year 3 2007 0 0
Year 4 2008 0 0
Year 5 2009 0 0
Name of Source Chino Basin Wells
SB X7-7 Table 4-A: Volume Entering the Distribution System(s) Complete one table for each source.

Baseline Year
Fm SB X7-7 Table 3
NOTES:

This water source is:

The supplier's own water source
A purchased or imported source
10 to 15 Year Baseline - Water into Distribution System 5 Year Baseline - Water into Distribution System
DWR NOTES: Units of measure (AF, MG , or CCF) must remain consistent throughout the UWMP, as reported in Table 2-3.

Meter Error Adjustment - See guidance in Methodology 1, Step 3 of Methodologies Document

Volume Entering
Distribution
System
Meter Error
Adjustment
Optional
(+/-)
Corrected
Volume Entering
Distribution
System
Year 1 2001 1724.9 1,725
Year 2 2002 2700.6 2,701
Year 3 2003 2957.9 2,958
Year 4 2004 2006 2,006
Year 5 2005 980.6 981
Year 6 2006 1131.1 1,131
Year 7 2007 1362.9 1,363
Year 8 2008 1402 1,402
Year 9 2009 1271.4 1,271
Year 10 2010 1180.4 1,180
Year 11 0 0
Year 12 0 0
Year 13 0 0
Year 14 0 0
Year 15 0 0
Year 1 2005 980.6 981
Year 2 2006 1131.1 1,131
Year 3 2007 1362.9 1,363
Year 4 2008 1402 1,402
Year 5 2009 1271.4 1,271
City of Corona
10 to 15 Year Baseline - Water into Distribution System 5 Year Baseline - Water into Distribution System
Name of Source
NOTES:

SB X7-7 Table 4-A: Volume Entering the Distribution System(s) Complete one table for each source.

Baseline Year
Fm SB X7-7 Table 3
A purchased or imported source
This water source is:

The supplier's own water source
DWR NOTES: Units of measure (AF, MG , or CCF) must remain consistent throughout the UWMP, as reported in Table 2-3.

Meter Error Adjustment - See guidance in Methodology 1, Step 3 of Methodologies Document

Volume Entering
Distribution
System
Meter Error
Adjustment
Optional
(+/-)
Corrected
Volume Entering
Distribution
System
Year 1 2001 127.8 128
Year 2 2002 369.1 369
Year 3 2003 397.7 398
Year 4 2004 276.4 276
Year 5 2005 83.8 84
Year 6 2006 0 0
Year 7 2007 0 0
Year 8 2008 0 0
Year 9 2009 0 0
Year 10 2010 0 0
Year 11 0 0
Year 12 0 0
Year 13 0 0
Year 14 0 0
Year 15 0 0
Year 1 2005 83.8 84
Year 2 2006 0 0
Year 3 2007 0 0
Year 4 2008 0 0
Year 5 2009 0 0
DWR NOTES: Units of measure (AF, MG , or CCF) must remain consistent throughout the UWMP, as reported in Table 2-3.

Meter Error Adjustment - See guidance in Methodology 1, Step 3 of Methodologies Document JCSD
This water source is:

A purchased or imported source
SB X7-7 Table 4-A: Volume Entering the Distribution System(s) Complete one table for each source.

Baseline Year
Fm SB X7-7 Table 3
NOTES:

Name of Source
10 to 15 Year Baseline - Water into Distribution System 5 Year Baseline - Water into Distribution System
The supplier's own water source

Volume Entering
Distribution
System
Meter Error
Adjustment
Optional
(+/-)
Corrected
Volume Entering
Distribution
System
Year 1 2001 0 0
Year 2 2002 0 0
Year 3 2003 0 0
Year 4 2004 2420.6 2,421
Year 5 2005 4379.8 4,380
Year 6 2006 4186.9 4,187
Year 7 2007 5060.2 5,060
Year 8 2008 5017.8 5,018
Year 9 2009 5393.1 5,393
Year 10 2010 4931.2 4,931
Year 11 0 0
Year 12 0 0
Year 13 0 0
Year 14 0 0
Year 15 0 0
Year 1 2005 4379.8 4,380
Year 2 2006 4186.9 4,187
Year 3 2007 5060.2 5,060
Year 4 2008 5017.5 5,018
Year 5 2009 5393.1 5,393
DWR NOTES: Units of measure (AF, MG , or CCF) must remain consistent throughout the UWMP, as reported in Table 2-3.

Meter Error Adjustment - See guidance in Methodology 1, Step 3 of Methodologies Document 10 to 15 Year Baseline - Water into Distribution System NOTES:
5 Year Baseline - Water into Distribution System
Baseline Year
Fm SB X7-7 Table 3
A purchased or imported source
SB X7-7 Table 4-A: Volume Entering the Distribution System(s) Complete one table for each source.

Name of Source Arlington Desalter
This water source is:

The supplier's own water source

Volume Entering
Distribution
System
Meter Error
Adjustment
Optional
(+/-)
Corrected
Volume Entering
Distribution
System
Year 1 2001 818.8 819
Year 2 2002 739.2 739
Year 3 2003 902.7 903
Year 4 2004 949.71 950
Year 5 2005 439.93 440
Year 6 2006 568.1 568
Year 7 2007 964.6 965
Year 8 2008 1165.13 1,165
Year 9 2009 979.2 979
Year 10 2010 1034.3 1,034
Year 11 0 0
Year 12 0 0
Year 13 0 0
Year 14 0 0
Year 15 0 0
Year 1 2005 439.93 440
Year 2 2006 568.1 568
Year 3 2007 964.6 965
Year 4 2008 1165.13 1,165
Year 5 2009 979.2 979
DWR NOTES: Units of measure (AF, MG , or CCF) must remain consistent throughout the UWMP, as reported in Table 2-3.

Meter Error Adjustment - See guidance in Methodology 1, Step 3 of Methodologies Document NOTES:

Baseline Year
Fm SB X7-7 Table 3
Name of Source Chino Desalter Authority
SB X7-7 Table 4-A: Volume Entering the Distribution System(s) Complete one table for each source.

This water source is:

The supplier's own water source
A purchased or imported source
10 to 15 Year Baseline - Water into Distribution System 5 Year Baseline - Water into Distribution System

Service Area
Population
Fm SB X7-7
Table 3
Annual Gross
Water Use
Fm SB X7-7
Table 4
Daily Per
Capita Water
Use (GPCD)
Year 1 2001 24,157 7,568 280
Year 2 2002 24,157 8,419 311
Year 3 2003 24,157 8,619 319
Year 4 2004 24,157 9,669 357
Year 5 2005 24,157 9,472 350
Year 6 2006 24,157 9,322 345
Year 7 2007 24,157 10,488 388
Year 8 2008 24,157 9,948 368
Year 9 2009 24,157 9,621 356
Year 10 2010 27,063 8,627 285
Year 11 0 - -
Year 12 0 - -
Year 13 0 - -
Year 14 0 - -
Year 15 0 - -
336
Service Area
Population
Fm SB X7-7
Table 3
Gross Water Use
Fm SB X7-7
Table 4
Daily Per
Capita Water
Use
Year 1 2005 24,157 9,472 350
Year 2 2006 24,157 9,322 345
Year 3 2007 24,157 10,488 388
Year 4 2008 24,157 9,948 368
Year 5 2009 24,157 9,621 356
361
NOTES:
5 Year Average Baseline GPCD
Baseline Year
Fm SB X7-7 Table 3
SB X7-7 Table 5: Baseline Gallons Per Capita Per Day (GPCD) Baseline Year
Fm SB X7-7 Table 3
10 to 15 Year Baseline GPCD
10-15 Year Average Baseline GPCD
5 Year Baseline GPCD

336
361
SB X7-7 Table 6: Baseline GPCD | Summary from
SB X7-7 Table 5
10-15 Year Baseline GPCD
5 Year Baseline GPCD
NOTES:

Supporting Tables
Method 1 SB X7-7 Table 7-A
Method 2 SB X7-7 Tables 7-B, 7-C, and 7-D
Method 3 SB X7-7 Table 7-E
Method 4
Method 4 Calculator
Located in the WUE Data Portal at
wuedata.water.ca.gov Resources
button
SB X7-7 Table 7: 2020 Target Method
Select Only One
Target Method
NOTES:

10-15 Year Baseline
GPCD
2020 Target
GPCD
336 269
SB X7-7 Table 7-A: Target Method 1
20% Reduction
NOTES:

Urban Water Management
Plan
City of Norco

APPENDIX F

PURCHASED WATER AGREEMENTS

Urban Water Management
Plan
City of Norco

APPENDIX G

RESOLUTION ADOPTION OF UWMP

RESOLUTION NO. 2026-44

A RESOLUTION OF THE CITY COUNCIL OF THE CITY OF NORCO,
CALIFORNIA ADOPTING THE 2025 URBAN WATER MANAGEMENT
PLAN
WHEREAS, the Urban Water Management Planning Act (California Water Code Sections 10610, et seq.) requires urban water suppliers to prepare and adopt an Urban Water Management Plan; and
WHEREAS, the Urban Water Management Planning Act requires that urban water management plans are to be prepared every five years by urban water suppliers with 3,000 or more service connections or supplying 3,000 or more acre-feet of water per year; and
WHEREAS, an Urban Water Management Plan generally describes the existing and projected potable water and recycled water supply and demands, water conservation measures, implementation, water supply reliability and water shortage contingency measures over a 20-year planning horizon; and WHEREAS, as an urban water supplier, the City of Norco has prepared its urban water management plan (UWMP) as required by the Urban Water Management Planning Act; and
WHEREAS, the primary goals in the UWMP are to identify long-term reliable water supplies, and continue to develop its recycled water system to reduce the reliability of potable water for irrigation; and
WHEREAS, the Water Conservation Act of 2009 (Senate Bill X7-7) which was enacted in November 2009 and requires that urban retail water suppliers, such as the City, develop per capita water use targets to be met by 2020; and WHEREAS, the City consulted with, and requested comments from, regional water and wastewater agencies such as the City of Corona, Jurupa Community Services District, Chino Desalter Authority, City of Riverside, and Western Municipal Water District, as required by Water Code Section 10641; and WHEREAS, prior to the public hearing the City made the draft UWMP available for public inspection and placed copies for public review at the City of Norco Department of Public Works, the City website, as well as making electronic copies available to agencies and the public, as required by Water Code Section 10642; and WHEREAS, on May 21, 2026, the City published notice in the Press Enterprise that on June 3, 2026 at 7:00 p.m. a public hearing regarding the draft UWMP would be held in Council Chambers at which time public comment on the plan would be received.

Additionally, notices of the date and time of the public hearing were sent to regional stakeholders as required by Water Code Section 10642; and

WHEREAS, on June 3, 2026 at 7:00 p.m. the public hearing was conducted in Council Chambers at which the public was provided the opportunity to comment on the UWMP.

NOW, THEREFORE, BE IT RESOLVED by the Council of the City of Norco as follows:

1. The City hereby adopts the 2025 Urban Water Management Plan

2. The Director of Public Works is hereby authorized and directed to file the City of Norco 2025 Urban Water Management Plan with the California Department of Water Resources, the California State Library and the County of Riverside within 30 days after adoption.

PASSED AND ADOPTED by the City Council at a regular meeting held on June 3, 2026.
_________________________
Robin Grundmeyer, Mayor
City of Norco, California
ATTEST:
________
Dayna Williams-Hunter, CMC, City Clerk
City of Norco, California
I, Dayna Williams-Hunter, CMC, City Clerk of the City of Norco, do hereby certify that the foregoing Resolution was adopted by the City Council of the City of Norco, California at a regular meeting thereof held on June 3, 2026 by the following vote of the City Council:

AYES:

NOES:

ABSENT:

ABSTAIN:

IN WITNESS WHEREOF, I have hereunto set my hand and affixed the official seal of the City of Norco, California, on June 3, 2026. ___
Dayna Williams-Hunter, CMC, City Clerk
City of Norco, California

RESOLUTION NO. 2026-52

A RESOLUTION OF THE CITY COUNCIL OF THE CITY OF NORCO,
CALIFORNIA ADOPTING THE 2025 WATER SHORTAGE

CONTINGENCY PLAN INCLUDED IN THE URBAN WATER

MANAGEMENT PLAN
WHEREAS, the Urban Water Management Planning Act (California Water Code Sections 10610, et seq.) requires urban water suppliers to prepare and adopt an Urban Water Management Plan; and
WHEREAS, the Urban Water Management Planning Act requires that urban water management plans are to be prepared every five years by urban water suppliers with 3,000 or more service connections or supplying 3,000 or more acre-feet of water per year; and
WHEREAS, an Urban Water Management Plan generally describes the existing and projected potable water and recycled water supply and demands, water conservation measures, implementation, water supply reliability and water shortage contingency measures over a 20-year planning horizon; and WHEREAS, the California Water Code requires urban water suppliers to prepare a Water Shortage Contingency Plan (WSCP) to be included in its UWMP; and WHEREAS, as an urban water supplier, the City of Norco has prepared its urban water management plan (UWMP) and a Water Shortage Contingency Plan (WSCP) as required by the Urban Water Management Planning Act; and WHEREAS, the primary goals in the WSCP are to identify long-term reliable water supplies, and continue to develop its recycled water system to reduce the reliability of potable water for irrigation; and
WHEREAS, the Water Conservation Act of 2009 (Senate Bill X7-7) which was enacted in November 2009 and requires that urban retail water suppliers, such as the City, develop per capita water use targets to be met by 2020; and WHEREAS, the City consulted with, and requested comments from, regional water and wastewater agencies such as the City of Corona, Jurupa Community Services District, Chino Desalter Authority, City of Riverside, and Western Municipal Water District, as required by Water Code Section 10641; and WHEREAS, prior to the public hearing the City made the draft WSCP available for public inspection and placed copies for public review at the City of Norco Department of Public Works, the City website, as well as making electronic copies available to agencies and the public, as required by Water Code Section 10642; and WHEREAS, on May 21, 2026, the City published notice in the Press Enterprise that on June 3, 2026 at 7:00 p.m. a public hearing regarding the draft WSCP would be held in Council Chambers at which time public comment on the plan would be received.

Additionally, notices of the date and time of the public hearing were sent to regional stakeholders as required by Water Code Section 10642; and Page 371 of 494 WHEREAS, on June 3, 2026 at 7:00 p.m. the public hearing was conducted in Council Chambers at which the public was provided the opportunity to comment on the WSCP.

NOW, THEREFORE, BE IT RESOLVED by the Council of the City of Norco as follows:

1. The City hereby adopts the 2025 Water Shortage Contingency Plan

2. The Director of Public Works is hereby authorized and directed to file the City of Norco 2025 Water Shortage Contingency Plan with the California Department of Water Resources, the California State Library and the County of Riverside within 30 days after adoption.

PASSED AND ADOPTED by the City Council at a regular meeting held on June 3, 2026.
_________________________
Robin Grundmeyer, Mayor
City of Norco, California
ATTEST:
________
Dayna Williams-Hunter, CMC, City Clerk
City of Norco, California
I, Dayna Williams-Hunter, CMC, City Clerk of the City of Norco, do hereby certify that the foregoing Resolution was adopted by the City Council of the City of Norco, California at a regular meeting thereof held on June 3, 2026 by the following vote of the City Council:

AYES:

NOES:

ABSENT:

ABSTAIN:

IN WITNESS WHEREOF, I have hereunto set my hand and affixed the official seal of the City of Norco, California, on June 3, 2026. ___
Dayna Williams-Hunter, CMC, City Clerk
City of Norco, California

NOTICE OF PUBLIC HEARING
PUBLIC NOTICE IS HEREBY GIVEN that the City Council for the City of Norco, California, will conduct a public hearing in the Council Chambers, at 2820 Clark Avenue, in said City on Wednesday, June 3, 2026, at 7:00 p.m., or thereafter to consider the item listed below:

RESOLUTION NO 2026-43

A RESOLUTION OF THE CITY COUNCIL OF THE CITY OF NORCO,
CALIFORNIA ADOPTING THE 2025 URBAN WATER MANAGEMENT
PLAN
Authorizing and directing The Director of Public Works to file the City of Norco 2025 Urban Water Management Plan with the California Department of Water Resources, the California State Library and the County of Riverside within 30 days of adoption.

Please contact the Norco City Clerk’s Office at (951) 270-5617 for more information regarding said item. Any person desiring may appear at said public hearing and be heard. Any person unable to attend said public hearing may submit written comments to the Norco City Clerk’s office by 3:00 p.m. on the above hearing date at Norco City Hall, 2870 Clark Avenue, Norco, California 92860 or email cityclerk@ ci.norco.ca.us.
______/S/________
Dayna Williams-Hunter, CMC
City Clerk
Posted May 18, 2026
The Press-Enterprise
Published: 5/21/26 Page 373 of 494
City Council

STAFF REPORT
Date: June 3, 2026 Agenda Item:

6.C.

To: Honorable Mayor and City Council Members
From: Amanda Hamilton, Deputy City Manager /
Community Operations Director
Prepared By: Amanda Hamilton, Deputy City Manager /
Community Operations Director
Department: Community Operations
SUBJECT:

Ordering the Continuation of Landscape Maintenance Districts, Confirming a Diagram, Assessment, and Annual Assessment Levy for Districts No. 1 – Beazer, Tract 28765; No. 2 – Western Pacific, Tract 25779; No. 3 – Centex, Tract 28626; No. 4 – Norco Ridge Ranch, Tracts 29588 and 29589; and No. 5 – Hawk’s Crest, Tract 30230 RECOMMENDATION:

Open the Public Hearing, hear public testimony, and adopt Resolution No. 2026-45, LMD No.1 (Beazer); Resolution No. 2026-46, LMD No. 2 (Western Pacific); Resolution No. 2026-47, LMD No. 3 (Centex); Resolution 2026-48, LMD No. 4 (Norco Ridge Ranch); Resolution No. 2026-49, LMD No. 5 (Hawks Crest), providing for an Annual Assessment Levy necessary to maintain the Landscape Maintenance Districts.

SUMMARY:

The “Landscaping and Lighting Act" of 1972 requires that an Engineer’s Report for existing Landscape Maintenance Districts (LMDs) must be reviewed and approved annually to continue assessments for the Districts. The Engineer’s Report includes the estimated fund balance for the fiscal year ending June 30, 2027, and the cash flow funding needs. At no time, will any district be assessed an amount greater than the Maximum Assessment Rate.

BACKGROUND:

The “Landscaping and Lighting Act" of 1972 requires that an Engineer’s Report for existing landscape maintenance districts (LMDs) must be reviewed and approved annually to continue assessments for the districts. The formation of LMD No. 1 allows the Maximum Assessment Rate to increase by 5% annually. The Maximum Assessment Rates for the remaining four districts increase annually by the percentage increase of the Local Consumer Price Index (“CPI”) for the Riverside-San Bernardino-Ontario

California Area for All Urban Consumers from March to March. The Annual CPI increase for March 2026 is 3.09%.

Each district will only assess the amount necessary to cover the costs in that district, so levying at the Maximum Assessment Rate may or may not be required during any fiscal year. The tables below show both the current year and the prior year Maximum Assessment Rate, as well as the rate that will be applied for the current fiscal year. At no time, will any district be assessed an amount greater than the Maximum Assessment Rate.

Maximum Allowable Assessment Rates
District FY 25-26 FY 26-27 FY 26-27
% Increase
LMD No. 1 $200.82 $210.86 5.00%
LMD No. 2 $893.28 $920.87 3.09%
LMD No. 3 $1,337.91 $1,379.24 3.09%
LMD No. 4 $1,422.39 $1,466.33 3.09%
LMD No. 4 (Mt.

Shasta - 25 Parcels) $1,422.39 $1,466.33 3.09%
LMD No. 5 $1,496.51 $1,542.74 3.09%
Applied Rate
District FY 25-26 FY 26-27 Difference FY 26-27
% Increase
LMD No. 1 $200.82 $210.86 $10.04 5.00%
LMD No. 2 $893.28 $920.86 $27.58 3.09%
LMD No. 3 $1,337.90 $1,379.24 $41.34 3.09%
LMD No. 4 $943.98 $1,126.54 $182.56 19.34%
LMD No. 4 (Mt.

Shasta - 25
Parcels)
$207.32 $247.42 $40.10 19.34%
LMD No. 5 $1,419.78 $1,514.78 $95.00 6.69%
The following information applies to each Landscape Maintenance District as designated:

Landscape Maintenance District No. 1
On February 3, 1999, City Council adopted Landscape Maintenance District No. 1 for Tract 28765 (Beazer Homes) comprised of 67 lots. The District was formed to maintain landscaping along the River Road frontage of the tract. The maximum assessment rate will be applied to this district due to the lack of reserves. Capital Improvement Projects (CIP) will not be scheduled for this district at this time.

Landscape Maintenance District No. 2
On January 27, 2000, the City Council established Landscape Maintenance District No. 2 for Tract No. 25799 (Western Pacific), consisting of 219 assessable lots. The district

provides for the maintenance and preservation of landscaping improvements along Norco Hills Road and Hidden Valley Parkway, as well as selected interior slopes, wetlands, equestrian trails, and Norco Hills Park, helping to maintain the district’s aesthetic appeal and recreational amenities.

In 2023, the Proposition 218 ballot measure to increase funding for the district was not approved. In response, the City implemented several cost-management measures to maintain the long-term financial stability of the district, including the removal of playground equipment at Norco Hills Park that had exceeded its useful life, as well as the removal of the temporary restroom facility to reduce ongoing operational and incidental costs.

To support continued maintenance services and improve the district’s financial position, the maximum allowable assessment rate will be levied this year. While Capital Improvement Projects (CIP) are not currently scheduled, the district is taking important steps toward future improvements. In 2025, a traffic study determined that certain landscaped areas within the district provide a general benefit to the broader community and should therefore be funded by the City’s General Fund. The identified general benefit areas include the landscaped slopes and parkway along Hidden Valley Parkway, as well as the landscaped frontage along Norco Hills Road between Hidden Valley Parkway and Parkview Drive. This determination does not include equestrian trail maintenance. As a result, $91,864 will be funded from the City's General Fund for the shared community benefit. Beginning this fiscal year, the district will begin gradually rebuilding Operating and Capital reserves to support future capital improvement projects and enhance long-term service sustainability.

Landscape Maintenance District No. 3
On June 6, 2001, the City Council established Landscape Maintenance District No. 3 for Tract 28626 (Centex), consisting of 82 lots. The district was created to ensure the longterm care and enhancement of landscaping improvements along Norco Hills Road, designated interior slopes, and equestrian trails, contributing to the overall aesthetics, functionality, and character of the district.

In 2023, a Proposition 218 ballot measure to increase funding for the district was conducted but was not approved. To maintain service levels and support long-term financial sustainability, the City completed a traffic study in 2025. The study determined that a portion of the district’s landscape maintenance costs provides a general benefit to the broader community; accordingly, those costs are appropriately supported by the City’s General Fund.

The general benefit area includes the landscaped parkway and slope along Norco Hills Road between Parkview Drive and Valley Drive. As a result, $32,270 will be funded from the City's General Fund for the shared community benefit. Beginning this fiscal year, the district will begin gradually rebuilding Operating and Capital reserves to support future capital improvement projects and enhance long-term service sustainability. Given current reserve levels, the maximum allowable assessment rate will be applied, and CIP projects are not currently scheduled; however, this approach establishes a more stable foundation for future CIP projects and long-term district sustainability.

Landscape Maintenance District No. 4
On October 2, 2002, the City Council established Landscape Maintenance District No. 4 for Tracts 29588 and 29589 (Norco Ridge Ranch), consisting of 557 developed singlefamily residential lots, including 25 lots that receive trail maintenance-only benefits, as well as five undeveloped lots, for a total of 562 assessable lots. The District was formed to provide for the ongoing maintenance, operation, and enhancement of landscaped and open space improvements throughout the District, including irrigated and nonirrigated slopes, fuel modification areas, parkway landscaping, equestrian trails, natural open space and wetland areas, and Ridge Ranch Park. These improvements contribute to the District’s aesthetic character, public safety, environmental sustainability, and overall quality of life.

The Acacia plant material located on the Crestview Drive and Valley Drive slopes is now more than 25 years old and has exceeded its anticipated useful life. The existing vegetation is experiencing substantial decline, including dieback and excessive woody growth, resulting in increased maintenance demands associated with trimming, vegetation management, and irrigation inefficiencies. As the plant material continues to deteriorate, the associated irrigation infrastructure has also become less effective and more costly to maintain.

To address these conditions, the City has initiated planning efforts for a phased slope rehabilitation program. The proposed approach includes the systematic removal of deteriorated vegetation in manageable sections, repair and enhancement of irrigation infrastructure where necessary, and restoration of the slopes through hydroseeding utilizing a California native plant palette. This rehabilitation strategy is intended to improve long-term slope stability and health, reduce ongoing maintenance requirements, increase irrigation efficiency, and establish a more sustainable and drought-tolerant landscape environment.

In support of these future improvements, the District will begin establishing reserve funding for the upcoming Capital Improvement Project known as the Crestview Drive and Valley Drive Slope Revitalization Project. Although the maximum allowable assessment rate will not be levied, an assessment increase of 19.34% is proposed for Fiscal Year 2026-27 to begin funding this long-term infrastructure and landscape rehabilitation effort. This proactive funding approach will assist in preserving District assets, improving operational efficiency, and ensuring the continued maintenance and enhancement of District improvements in a fiscally responsible manner.

Landscape Maintenance District No. 5
On January 7, 2004, the City Council established Landscape Maintenance District No. 5 for Tract 30230 (Hawks Crest), consisting of 50 assessable lots. The District was formed to provide for the ongoing maintenance, operation, and enhancement of exterior slopes, parkway landscaping, equestrian trails, two park parcels, and Hawks Crest Park. These improvements contribute to the District’s overall aesthetic character, functionality, and recreational amenities.

To support the continued maintenance and enhancement of District assets, the City will begin setting aside Capital Improvement Project (CIP) reserves during the upcoming

fiscal year. These reserves are intended to fund future parkway irrigation improvements, including the conversion of portions of the existing irrigation system to drip irrigation technology to improve water efficiency, reduce maintenance demands, and support long-term landscape sustainability.

The proposed Capital Improvement Project also includes the removal and replacement of existing fencing with new commercial-grade white vinyl fencing, modifications and upgrades to existing irrigation infrastructure, installation of drip irrigation components, and restoration of all disturbed areas upon project completion. Collectively, these improvements are intended to enhance operational efficiency, improve the long-term sustainability of landscaped areas, and preserve the visual character and appearance of the District.

Although the maximum allowable assessment rate will not be levied, an assessment increase of 6.69% is proposed for Fiscal Year 2026-27 to begin funding the planned white vinyl fencing and irrigation improvement projects.

Below is a summary of the Operating and CIP Reserve fund information for all five Districts:

District FY 26-27
Budget
Beginning
Reserve & CIP
Fund Balance
Reserve & CIP
Fund
Collection &
Contribution
Ending
Reserve & CIP
Fund Balance
LMD No. 1 $14,128 (7,500) $189 ($7,311)
LMD No. 2 $201,671 $20,177 $124,891 $145,068
LMD No. 3 $113,099 $17,781 $41,224 $59,005
LMD No. 4 $605,507 $329,398 $75,000 $404,398
LMD No. 5 $75,739 $67,675 $22,546 $90,221
The Engineer’s Report includes the estimated fund balance for Fiscal Year ending June 30, 2026, and the cash flow funding needs. Each district requires a six-month cash flow reserve to sustain the District from the beginning of the fiscal year (July 1) until the City receives from the County of Riverside, its first assessment payment, six months later. If the City does not have this reserve, the general fund reserves must “carry” the District.

The “estimated unfunded needs” is the difference between the “fund balance” and the “needs.”
Below is a summary of the services provided in each maintenance district:

District Trails Parkway
Maintenance
Slope
Maintenance
Park
Maintenance
Wetland
Maintenance
LMD No. 1*
LMD No. 2 X X** X X
LMD No. 3 X Some X
LMD No. 4 X Some X X X
LMD No. X

4***
LMD No. 5 X X X X
*River Road Landscaping Only
**Slope on Hidden Valley Parkway
***Lots TR 29588-1 (Mt. Shasta - 25 Parcels) Receive Trail & Slope Maintenance Only. This subdivision is not contiguous with the majority of Norco Ridge Ranch.

The observation line item for each District funds the LMD Inspector. The observation line item is broken into percentages based on the size and demand of the District. The breakdown is as follows:

Landscape Maintenance District Percentage of Observance Cost LMD No. 1 5%
LMD No. 2 25%
LMD No. 3 20%
LMD No. 4 35%
LMD No. 5 15%
The City’s Landscape Maintenance Districts continue to provide essential, long-term maintenance and enhancement of landscaped areas, equestrian trails, and open space in the districts. The Preliminary Engineer’s Reports for each district have been prepared to support the continued delivery of these services in a transparent, equitable, and fiscally responsible manner.

FISCAL IMPACT:

The General Fund will contribute $91,864 for Landscape Maintenance District No. 2 and $32,270 for Landscape Maintenance District No. 3, for a total fiscal impact of $124,134.

These amounts reflect the portion of landscape maintenance costs determined to provide a general benefit to the broader community. The total General Fund contribution will be reflected in the Park Maintenance Budget (737 – Contractual Services).

RELATIONSHIP TO STRATEGIC PLAN:

This agenda item is consistent with Strategic Direction No. 3, "Economic Development and Financial Stability"
REVIEWED AND APPROVED BY:

Certified as to Availability of Funds: Joshua Calhoun, Finance Director Approved by: Lisette Free, City Manager
Approved as to Form: Harper and Burns, LLP, City Attorney ATTACHMENT(S):

Resolution No. 2026-45 Ordering Continuation of LMD 1
Resolution No. 2026-46 Ordering Continuation of LMD 2
Resolution No. 2026-47 Ordering Continuation of LMD 3

Resolution No. 2026-48 Ordering Continuation of LMD 4
Resolution No. 2026-49 Ordering Continuation of LMD 5
FY 26-27 Norco LMD No. 1 Engineer's Report
FY 26-27 Norco LMD No. 2 Engineer's Report
FY 26-27 Norco LMD No. 3 Engineer's Report
FY 26-27 Norco LMD No. 4 Engineer's Report
FY 26-27 Norco LMD No. 5 Engineer's Report

RESOLUTION NO. 2026-45

A RESOLUTION OF THE CITY COUNCIL OF THE CITY OF NORCO,

CALIFORNIA ORDERING THE CONTINUATION OF A LANDSCAPING

MAINTENANCE DISTRICT AND CONFIRMING A DIAGRAM AND

ASSESSMENT AND PROVIDING FOR ANNUAL ASSESSMENT LEVY
WHEREAS, the City Council of the City of Norco, California, has initiated proceedings for the continuation of a Landscape Maintenance District and the annual levy of said assessments for said District pursuant to the terms and provisions of the “Landscaping and Street Lighting Act of 1972,” being Division 15, Part 2 of the Streets and Highways Code of the State of California, in a district known and designated as:

CITY OF NORCO
LANDSCAPING MAINTENANCE DISTRICT NO. 1 (BEAZER, TRACT 28765) (Hereinafter referred to as the “District”); and
WHEREAS, the City Council has ordered the preparation of a report and the City Engineer has prepared and filed with this City Council a report pursuant to law for its consideration and subsequently thereto this City Council did adopt its Resolution of Intent to levy and collect assessments for the next ensuing fiscal year relating to the above-referenced District, and further did proceed to give notice of the time and place for a Public Hearing on all matters relating thereto; and, WHEREAS, at this time this City Council has heard all testimony and evidence, and desires to proceed with the annual levy of assessments.

NOW, THEREFORE, BE IT RESOLVED as follows:

SECTION 1: That the above recitals are all true and correct.

SECTION 2: That this City Council hereby confirms the diagram and assessment as submitted and orders the annual levy of the assessment for the fiscal year and in the amounts as set forth in the Engineer’s Report and as referred to in the Resolution of Intent as previously adopted relating to said annual assessment levy.

SECTION 3: That the diagram and assessment as set forth and contained in said Report are hereby confirmed and adopted by this City Council.

SECTION 4: That the adoption of this Resolution constitutes the levy of the assessment for the fiscal year.

Resolution No. 2026-45, LMD No. 1 - Beazer

June 3, 2026
SECTION 5: That the estimates of costs, the assessment diagram, the assessments and all other matters, as set forth in the Engineer’s Report, pursuant to said “Landscaping and Street Lighting Act of 1972”, as submitted, are hereby approved, adopted by this City Council and hereby confirmed.

SECTION 6: That the maintenance works and/or improvements are contemplated by the Resolution of Intent shall be performed pursuant to law and the County Auditor shall enter on the County Assessment Roll the amount of the assessment and said assessment shall then be collected at the same time and in the same manner that County taxes are collected. After collection by said County, the net amount of the assessment shall be paid to the City Treasurer of said City.

SECTION 7: That the City Treasurer has previously established a special fund known as the CITY OF NORCO LANDSCAPING MAINTENANCE DISTRICT NO. 1, (BEAZER, TRACT NO. 28765) into which the City Treasurer shall place all monies collected by the Tax Collector pursuant to the provisions of this Resolution and law and including any surplus amounts in those funds established for the existing Districts and said transfer shall be made and accomplished soon as said monies have been made available to said City Treasurer.

SECTION 8: That the City Engineer is hereby ordered and directed to file a certified copy of the diagram and assessment roll with the County Auditor, together with a certified copy of this Resolution upon its adoption.

SECTION 9: That a certified copy of the assessment and diagram shall be filed in the office of the City Engineer, with a duplicate copy on file in the Office of the City Clerk and open for public inspection.

Resolution No. 2026-45, LMD No. 1 - Beazer

June 3, 2026
PASSED AND ADOPTED by the City Council of the City of Norco at a regular meeting held on June 3, 2026.
___________________________
Robin Grundmeyer, Mayor
City of Norco, California
ATTEST:
_________________________
Dayna Williams-Hunter, CMC, City Clerk
City of Norco, California
I, Dayna Williams-Hunter, City Clerk of the City of Norco, California, do hereby certify that the foregoing Resolution was adopted by the City Council of the City of Norco, California, at a regular meeting thereof held on June 3, 2026, by the following vote of the City Council:

AYES:

NOES:

ABSENT:

ABSTAIN:

IN WITNESS WHEREOF, I have hereunto set my hand affixed the official seal of the City of Norco, California, held on June 3, 2026.
_________________________
Dayna Williams-Hunter, CMC, City Clerk
City of Norco, California

RESOLUTION NO. 2026-46

A RESOLUTION OF THE CITY COUNCIL OF THE CITY OF NORCO

ORDERING THE CONTINUATION OF A LANDSCAPING

MAINTENANCE DISTRICT AND CONFIRMING A DIAGRAM AND

ASSESSMENT AND PROVIDING FOR ANNUAL ASSESSMENT LEVY
WHEREAS, The City Council has initiated proceedings for the continuation of a Landscaping Maintenance District and the annual levy of assessments for said District pursuant to the terms and provision of the “Landscaping and Street Lighting Act of 1972,” being Part 2 of Division 15 of the Streets and Highways Code of the State of California, in a district known and designated as:

CITY OF NORCO
LANDSCAPING MAINTENANCE DISTRICT NO. 2
(WESTERN PACIFIC, TRACT 25779)
WHEREAS, the City Council has ordered the preparation of a report and the City Engineer has prepared and filed with this City Council a report pursuant to law for its consideration and subsequently thereto this City Council did adopt its Resolution of Intention to levy and collect assessments for the next ensuing fiscal year relating to the above-referenced District, and further did proceed to give notice of the time and place for a Public Hearing on all matters relating thereto; and, WHEREAS, at this time, this City Council has heard all testimony and evidence, and desires to proceed with the annual levy of assessments.

NOW, THEREFORE, BE IT RESOLVED as follows:

SECTION 1. That the above-recitals are all true and correct.

SECTION 2. That this City Council hereby confirms the diagram and assessment as submitted and orders the annual levy of the assessment for the fiscal year and in the amounts as set forth in the Engineer's Report and as referred to in the Resolution of Intention as previously adopted relating to said annual assessment levy.

SECTION 3. That the assessment as set forth and contained in said Report are hereby confirmed and adopted by this City Council.

SECTION 4. That the adoption of this Resolution constitutes the levy of the assessment for the fiscal year.

SECTION 5. That the estimates of costs, the assessment diagram, the assessments and all other matters, as set forth in Engineer's “Report,” pursuant to said

Resolution No. 2026-46, LMD No. 2 - Western Pacific

June 3, 2026
"Landscaping and Street Lighting Act of 1972,” as submitted, are hereby approved, adopted by this City Council and hereby confirmed.

SECTION 6. That the maintenance works and/or improvements contemplated by the Resolution of Intention shall be performed pursuant to law and the County Auditor shall enter on the County Assessment Roll the amount of the assessment and said assessment shall then be collected at the same time and in the same manner as the County taxes are collected. After collection by said County, the net amount of the assessment shall be paid to the City Treasurer of said City.

SECTION 7. That the City Treasurer has previously established a special fund known as the CITY OF NORCO LANDSCAPING MAINTENANCE DISTRICT NO. 2, (WESTERN PACIFIC, TRACT 25779) into which the City Treasurer shall place all monies collected by the Tax Collector pursuant to the provisions of this Resolution and law and including any surplus amounts in those funds established for the existing Districts and said transfer shall be made and accomplished as soon as said monies have been made available to said City Treasurer.

SECTION 8. That the City Engineer is hereby ordered and directed to file a certified copy of the diagram and assessment roll with the County Auditor, together with a certified copy of this Resolution upon its adoption.

SECTION 9. That a certified copy of the assessment and diagram shall be filed in the office of the City Engineer, with a duplicate copy on file in the Office of the City Clerk and open for public inspection.

Resolution No. 2026-46, LMD No. 2 - Western Pacific

June 3, 2026
PASSED and ADOPTED by the City Council of the City of Norco at a regular meeting held on June 3, 2026.
__________________________
Robin Grundmeyer, Mayor
City of Norco, California
ATTEST:
__________________________
Dayna Williams-Hunter, CMC, City Clerk
City of Norco, California
I, Dayna Williams-Hunter, City Clerk of the City of Norco, California, do hereby certify that the foregoing Resolution was regularly introduced and adopted by the City Council of the City of Norco, California, at a regular meeting thereof held on June 3, 2026, by the following vote of the City Council:

AYES:

NOES:

ABSENT:

ABSTAIN:

IN WITNESS WHEREOF, I have hereunto set my hand and affixed the official seal of the City of Norco, California on June 3, 2026.
__________________________
Dayna Williams-Hunter, CMC, City Clerk
City of Norco, California

RESOLUTION NO. 2026-47

A RESOLUTION OF THE CITY COUNCIL OF THE CITY OF NORCO,

CALIFORNIA ORDERING THE CONTINUATION OF A LANDSCAPING

MAINTENANCE DISTRICT AND CONFIRMING A DIAGRAM AND

ASSESSMENT AND PROVIDING FOR ANNUAL ASSESSMENT LEVY
WHEREAS, the City Council of the City of Norco, California, has initiated proceedings for the continuation of a Landscape Maintenance District and the annual levy of said assessments for said District pursuant to the terms and provisions of the “Landscaping and Street Lighting Act of 1972,” being Division 15, Part 2 of the Streets and Highways Code of the State of California, in a district known and designated as:

CITY OF NORCO
LANDSCAPING MAINTENANCE DISTRICT NO. 3
(CENTEX, TRACT 28626)
(hereinafter referred to as the “District”); and
WHEREAS, the City Council has ordered the preparation of a report and the City Engineer has prepared and filed with this City Council a report pursuant to law for its consideration and subsequently thereto this City Council did adopt its Resolution of Intent to levy and collect assessments for the next ensuing fiscal year relating to the above-referenced District, and further did proceed to give notice of the time and place for a Public Hearing on all matters relating thereto; and, WHEREAS, at this time this City Council has heard all testimony and evidence, and desires to proceed with the annual levy of assessments.

NOW, THEREFORE, BE IT RESOLVED as follows:

SECTION 1: That the above recitals are all true and correct.

SECTION 2: That this City Council hereby confirms the diagram and assessment as submitted and orders the annual levy of the assessment for the fiscal year and in the amounts as set forth in the Engineer’s Report and as referred to in the Resolution of Intent as previously adopted relating to said annual assessment levy.

SECTION 3: That the diagram and assessment as set forth and contained in said Report are hereby confirmed and adopted by this City Council.

SECTION 4: That the adoption of this Resolution constitutes the levy of the assessment for the fiscal year.

Resolution No. 2026-47, LMD No.3 - Centex

June 3, 2026
SECTION 5: That the estimates of costs, the assessment diagram, the assessments and all other matters, as set forth in the Engineer’s Report, pursuant to said “Landscaping and Street Lighting Act of 1972”, as submitted, are hereby approved, adopted by this City Council and hereby confirmed.

SECTION 6: That the maintenance works and/or improvements are contemplated by the Resolution of Intent shall be performed pursuant to law and the County Auditor shall enter on the County Assessment Roll the amount of the assessment and said assessment shall then be collected at the same time and in the same manner that County taxes are collected. After collection by said County, the net amount of the assessment shall be paid to the City Treasurer of said City.

SECTION 7: That the City Treasurer has previously established a special fund known as the CITY OF NORCO LANDSCAPING MAINTENANCE DISTRICT NO. 3, (CENTEX, TRACT NO. 28626) into which the City Treasurer shall place all monies collected by the Tax Collector pursuant to the provisions of this Resolution and law and including any surplus amounts in those funds established for the existing Districts and said transfer shall be made and accomplished soon as said monies have been made available to said City Treasurer.

SECTION 8: That the City Engineer is hereby ordered and directed to file a certified copy of the diagram and assessment roll with the County Auditor, together with a certified copy of this Resolution upon its adoption.

SECTION 9: That a certified copy of the assessment and diagram shall be filed in the office of the City Engineer, with a duplicate copy on file in the Office of the City Clerk and open for public inspection.

Resolution No. 2026-47, LMD No.3 - Centex

June 3, 2026
PASSED AND ADOPTED by the City Council of the City of Norco at a regular meeting held on June 3, 2026.
__________________________
Robin Grundmeyer, Mayor
City of Norco, California
ATTEST:
_________________________
Dayna Williams-Hunter, CMC, City Clerk
City of Norco, California
I, Dayna Williams-Hunter, City Clerk of the City of Norco, California, do hereby certify that the foregoing Resolution was adopted by the City Council of the City of Norco, California, at a regular meeting thereof held on June 3, 2026, by the following vote of the City Council:

AYES:

NOES:

ABSENT:

ABSTAIN:

IN WITNESS WHEREOF, I have hereunto set my hand affixed the official seal of the City of Norco, California, held on June 3, 2026.
_________________________
Dayna Williams-Hunter, CMC, City Clerk
City of Norco, California

RESOLUTION NO. 2026-48

A RESOLUTION OF THE CITY COUNCIL OF THE CITY OF NORCO

ORDERING THE CONTINUATION OF A LANDSCAPING

MAINTENANCE DISTRICT AND CONFIRMING A DIAGRAM AND

ASSESSMENT AND PROVIDING FOR ANNUAL ASSESSMENT LEVY
WHEREAS, The City Council has initiated proceedings for the continuation of a Landscaping Maintenance District and the annual levy of assessments for said District pursuant to the terms and provision of the “Landscaping and Street Lighting Act of 1972,” being Part 2 of Division 15 of the Streets and Highways Code of the State of California, in a district known and designated as:

CITY OF NORCO
LANDSCAPING MAINTENANCE DISTRICT NO. 4
(NORCO RIDGE RANCH, TRACT 29588 AND 29589)
WHEREAS, the City Council has ordered the preparation of a report and the City Engineer has prepared and filed with this City Council a report pursuant to law for its consideration and subsequently thereto this City Council did adopt its Resolution of Intention to levy and collect assessments for the next ensuing fiscal year relating to the above-referenced District, and further did proceed to give notice of the time and place for a Public Hearing on all matters relating thereto; and, WHEREAS, at this time, this City Council has heard all testimony and evidence, and desires to proceed with the annual levy of assessments.

NOW, THEREFORE, BE IT RESOLVED as follows:

SECTION 1. That the above-recitals are all true and correct.

SECTION 2. That this City Council hereby confirms the diagram and assessment as submitted and orders the annual levy of the assessment for the fiscal year and in the amounts as set forth in the Engineer's Report and as referred to in the Resolution of Intention as previously adopted relating to said annual assessment levy.

SECTION 3. That the diagram and assessment as set forth and contained in said Report are hereby confirmed and adopted by this City Council.

SECTION 4. That the adoption of this Resolution constitutes the levy of the assessment for the fiscal year.

SECTION 5. That the estimates of costs, the assessment diagram, the assessments and all other matters, as set forth in Engineer's “Report,” pursuant to said

Resolution No. 2026-48, LMD No. 4 - Norco Ridge Ranch

June 3, 2026
"Landscaping and Street Lighting Act of 1972,” as submitted, are hereby approved, adopted by this City Council and hereby confirmed.

SECTION 6. That the maintenance works and/or improvements contemplated by the Resolution of Intention shall be performed pursuant to law and the County Auditor shall enter on the County Assessment Roll the amount of the assessment and said assessment shall then be collected at the same time and in the same manner as the County taxes are collected. After collection by said County, the net amount of the assessment shall be paid to the City Treasurer of said City.

SECTION 7. That the City Treasurer has previously established a special fund known as the CITY OF NORCO LANDSCAPING MAINTENANCE DISTRICT NO. 4, (NORCO RIDGE RANCH, TRACT 29588 AND 29589) into which the City Treasurer shall place all monies collected by the Tax Collector pursuant to the provisions of this Resolution and law and including any surplus amounts in those funds established for the existing Districts and said transfer shall be made and accomplished as soon as said monies have been made available to said City Treasurer.

SECTION 8. That the City Engineer is hereby ordered and directed to file a certified copy of the diagram and assessment roll with the County Auditor, together with a certified copy of this Resolution upon its adoption.

SECTION 9. That a certified copy of the assessment and diagram shall be filed in the office of the City Engineer, with a duplicate copy on file in the Office of the City Clerk and open for public inspection.

Resolution No. 2026-48, LMD No. 4 - Norco Ridge Ranch

June 3, 2026
PASSED and ADOPTED by the City Council of the City of Norco at a regular meeting held on June 3, 2026.
___________________________
Robin Grundmeyer, Mayor
City of Norco, California
ATTEST:
__________________________
Dayna Williams-Hunter, CMC, City Clerk
City of Norco, California
I, Dayna William-Hunter, City Clerk of the City of Norco, California, do hereby certify that the foregoing Resolution was regularly introduced and adopted by the City Council of the City of Norco, California, at a regular meeting thereof held on June 3, 2026, by the following vote of the City Council:

AYES:

NOES:

ABSENT:

ABSTAIN:

IN WITNESS WHEREOF, I have hereunto set my hand and affixed the official seal of the City of Norco, California on June 3, 2026.
__________________________
Dayna Williams-Hunter, CMC, City Clerk
City of Norco, California

RESOLUTION NO. 2026-49

A RESOLUTION OF THE CITY COUNCIL OF THE CITY OF NORCO,

CALIFORNIA ORDERING THE CONTINUATION OF A LANDSCAPING

MAINTENANCE DISTRICT AND CONFIRMING A DIAGRAM AND

ASSESSMENT AND PROVIDING FOR ANNUAL ASSESSMENT LEVY
WHEREAS, the City Council of the City of Norco, California, has initiated proceedings for the continuation of a Landscape Maintenance District and the annual levy of said assessments for said District pursuant to the terms and provisions of the “Landscaping and Street Lighting Act of 1972,” being Division 15, Part 2 of the Streets and Highways Code of the State of California, in a district known and designated as:

CITY OF NORCO
LANDSCAPING MAINTENANCE DISTRICT NO. 5
(HAWKS CREST – KB HOME)
(hereinafter referred to as the “District”); and
WHEREAS, the City Council has ordered the preparation of a report and the City Engineer has prepared and filed with this City Council a report pursuant to law for its consideration and subsequently thereto this City Council did adopt its Resolution of Intent to levy and collect assessments for the next ensuing fiscal year relating to the above-referenced District, and further did proceed to give notice of the time and place for a Public Hearing on all matters relating thereto; and, WHEREAS, at this time this City Council has heard all testimony and evidence, and desires to proceed with the annual levy of assessments.

NOW, THEREFORE, BE IT RESOLVED as follows:

SECTION 1: That the above recitals are all true and correct.

SECTION 2: That this City Council hereby confirms the diagram and assessment as submitted and orders the annual levy of the assessment for the fiscal year and in the amounts as set forth in the Engineer’s Report and as referred to in the Resolution of Intent as previously adopted relating to said annual assessment levy.

SECTION 3: That the diagram and assessment as set forth and contained in said Report are hereby confirmed and adopted by this City Council.

SECTION 4: That the adoption of this Resolution constitutes the levy of the assessment for the fiscal year.

Resolution No. 2026-49, LMD No. 5 - Hawks Crest

June 3, 2026
SECTION 5: That the estimates of costs, the assessment diagram, the assessments and all other matters, as set forth in the Engineer’s Report, pursuant to said “Landscaping and Street Lighting Act of 1972”, as submitted, are hereby approved, adopted by this City Council and hereby confirmed.

SECTION 6: That the maintenance works and/or improvements are contemplated by the Resolution of Intent shall be performed pursuant to law and the County Auditor shall enter on the County Assessment Roll the amount of the assessment and said assessment shall then be collected at the same time and in the same manner that County taxes are collected. After collection by said County, the net amount of the assessment shall be paid to the City Treasurer of said City.

SECTION 7: That the City Treasurer has previously established a special fund known as the CITY OF NORCO LANDSCAPING MAINTENANCE DISTRICT NO. 5, (HAWKS CREST – KB HOME) into which the City Treasurer shall place all monies collected by the Tax Collector pursuant to the provisions of this Resolution and law and including any surplus amounts in those funds established for the existing Districts and said transfer shall be made and accomplished soon as said monies have been made available to said City Treasurer.

SECTION 8: That the City Engineer is hereby ordered and directed to file a certified copy of the diagram and assessment roll with the County Auditor, together with a certified copy of this Resolution upon its adoption.

SECTION 9: That a certified copy of the assessment and diagram shall be filed in the office of the City Engineer, with a duplicate copy on file in the Office of the City Clerk and open for public inspection.

Resolution No. 2026-49, LMD No. 5 - Hawks Crest

June 3, 2026
PASSED AND ADOPTED by the City Council of the City of Norco at a regular meeting held on June 3, 2026.
__________________________
Robin Grundmeyer, Mayor
City of Norco, California
ATTEST:
_________________________
Dayna Williams-Hunter, CMC, City Clerk
City of Norco, California
I, Dayna Williams-Hunter, City Clerk of the City of Norco, California, do hereby certify that the foregoing Resolution was adopted by the City Council of the City of Norco, California, at a regular meeting thereof held on June 3, 2026, by the following vote of the City Council:

AYES:

NOES:

ABSENT:

ABSTAIN:

IN WITNESS WHEREOF, I have hereunto set my hand affixed the official seal of the City of Norco, California, held on June 3, 2026.
_________________________
Dayna Williams-Hunter, CMC, City Clerk
City of Norco, California

Engineer’s Report
Fiscal Year 2026-2027
City of Norco
Landscape Maintenance District No. 1 (Beazer)
Prepared For
June 2026

Table of Contents
Sections
Section i. Engineer’s Statement ________________________________________________________ i Section 1. Plans and Specifications ______________________________________________________1 Section 2. Cost Estimate ______________________________________________________________2 Section 3. Method of Apportionment ___________________________________________________4 Section 4. Assessment________________________________________________________________7 Section 5. Assessment Diagram ________________________________________________________8 Tables
Table 2-1. Budget Details _____________________________________________________________3 Appendices
Appendix A. Assessment Roll __________________________________________________________A-1 Appendix B. Assessment Diagram ______________________________________________________ B-1

i. Engineer’s Statement
City of Norco Landscape Maintenance District No. 1
Engineer’s Report for Fiscal Year 2026-2027 i
AGENCY: CITY OF NORCO
PROJECT: LANDSCAPE MAINTENANCE DISTRICT NO. 1
TO: CITY COUNCIL

CITY OF NORCO

STATE OF CALIFORNIA
Report Pursuant to "Landscaping and Lighting Act of 1972" Pursuant to direction from the City Council (the “City Council”) of the City of Norco (the “City”), State of California, submitted herewith is the Engineer’s Report for Landscape Maintenance District No. 1 (the "Report"), consisting of the following parts, pursuant to the provisions of Division 15, Part 2 of the Streets and Highways Code of the State of California, being the "Landscaping and Lighting Act of 1972" (the “1972 Act”), as amended, commencing with Section 22500, and which is in accordance with Resolution No. 2026-13 adopted by the City Council, Riverside County, California ordering the preparation of the Report for Landscape Maintenance District No. 1 (the “District” or “LMD No. 1”). This Report is applicable for the ensuing 12-month period, being the Fiscal Year commencing July 1, 2026, to June 30, 2027.

SECTION 1 PLANS AND SPECIFICATIONS of the improvements to be maintained and/or improved for Fiscal Year 2026-2027. The plans and specifications show and describe the existing improvements and are sufficient in showing and describing the general nature, location, and extent of the improvements.

SECTION 2 A COST ESTIMATE of the improvements to be maintained and-or improved for the mentioned Fiscal Year.

SECTION 3 The METHOD OF APPORTIONMENT showing the proportionate amount of the assessment to be charged in proportion to the benefits to be received by each lot or parcel within the exterior boundaries as shown in Appendix B.

SECTION 4 An ASSESSMENT showing the proportionate amount of the assessment to be charged in proportion to the benefits to be received by each lot or parcel within the boundaries of the District, as shown in Appendix B.

SECTION 5 An ASSESSMENT DIAGRAM of the District. Said Diagrams shall show the boundaries of the District.

Reference is made to the Riverside County (the “County”) Assessor's Maps for a detailed description of the lines and dimensions of any lots or parcels. The lines and dimensions of each lot shall conform to those shown on the County Assessor's Maps for the Fiscal Year to which the Report applies.