El Centro City Council
September 1, 2026

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indirect recycled water use; no water placed in long-term storage; no water delivered to another urban supplier; no water delivered for agricultural use; and no significant process water use.

4.2 Water Use by Sector
Water Use Sectors Listed in Water Code
An agency’s water consumption can be projected by understanding the type of use and customer type creating the demand. Developing local water use profiles helps to identify quantity of water used, and by whom within the agency’s service area. Knowledge of water use by customer type enables the City to develop more effective water conservation programs and to project the future benefit of those programs.

Historical water use by sector for the City is shown in Table 4-1A. Metered residential water use has accounted for approximately 70 percent of total metered water use. Total water use, including unaccountedfor water, decreased by 12 percent between 2010 and 2015 and then gradually increased by 12 percent between 2015 and 2025. Estimated water loss for 2025 shows a significant increase, however, the value is preliminary as the water loss audit for 2025 has not been completed. The unaudited value is based on 2025 water supply volumes and customer billing data. The water loss audit, once completed for 2025, will account for unbilled usage including water usage during operation and maintenance activities, changes in storage, and other factors. Water loss, or non-revenue water, is further defined in Section 4.2.2, Table 4-1 A: Historical Water Use and Water Loss
Table 4-1 A: Historical Water Use and Water Loss

2010 Water
Use/Supply
2015 Water
Use/Supply
2020 Water
Use/Supply
2025 Water
Use/Supply
Single-Family Residential 4,399 3,870 4,039 3,464
Multi-Family Residential 822 848 1,048 1,021
Total Residential 5,221 4,719 5,087 4,485
Commercial 1,295 906 813 854
Institutional/Governmental 451 407 435 457
Industrial 5 1 0.6 1
Landscape 235 519 771 677
Fireline 0 0 0 7
Total Metered Use 7,207 6,552 7,107 6,481
Water Loss9 839 565 473 1,489
Total Water Supply 8,046 7,117 7,580 7,970
9 Non-Revenue Water for 2025 was calculated as follows: (total water production at the City’s Water Treatment Plant) – (water system sales through metered connections). Includes authorized but unbilled water use for fighting fires, flushing water mains, fire flow test, etc.

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Non-Revenue Water
Non-revenue water is defined by the International Water Association (IWA) and American Water Works Association (AWWA) as the difference between distribution systems input volume (i.e., production at the City’s Water Treatment Plant)) and billed authorized consumption. Non-revenue water consists of three components: unbilled authorized consumption (e.g., hydrant flushing and firefighting), real losses (e.g., leakage in mains and service lines), and apparent losses (unauthorized consumption and customer metering inaccuracies). An increase or decrease in treated water storage during the calendar year must also be accounted for when determining total non-revenue water volume. Refer to Section 4.3 for a detailed discussion of non-revenue water demands.

It should be noted, that while the City meters all water used in its public parks, it does not bill its Parks and Recreation Division for that water (a policy consistent with that of many other California municipalities).

However, while no direct revenue is generated from park water usage, the metered water usage data is taken into account when setting overall water rates. Since park water usage typically represents 4-5% of the City’s total water usage in most years, and since City residents and businesses benefit from recreational opportunities in those parks, it makes sense that those residents and businesses should be paying their fair share for park water. Thus, while no direct revenue is collected for park water usage, that water is considered “revenue” water in that the City’s residential and CII users are in effect subsidizing the cost of that water through the overall water rate structure.

Past and Current Water Use
Historical water use for the past five years, i.e., since the previous UWMP, is shown in Table 4-1B. The values in Table 4-1B are taken from the City’s Water Loss Audit reports for 2020 through 2024. The Water Loss Audit for 2025 has not been completed and values are based on total production into distribution and metered use. Total water use, including non-revenue water, has increased by 5% from 7,580 AF in 2020 to 7,970 AF in 2025.

Table 4-1 B: Historical Water Use
Table 4-1 B: Historical Water Use
2020 2021 2022 2023 2024 2025
Total Metered Use 7,107 6,951 7,065 6,755 6,702 6,481
Non-Revenue Water 473 1,317 1,378 908 1,341 1,489
Potable System Supply 7,580 8,268 8,443 7,663 8,044 7,970 Total Water Demand 7,580 8,268 8,443 7,663 8,044 7,970
Water Demand by Sector – 2025
All water system demands in the City are met by raw water surface water imported from the Colorado River and purchased from IID. This imported water is the sole water supply for the City of El Centro. The raw water is treated to potable water standards at the City’s water treatment plant before being distributed to the City’s water service area. There is no current and no projected recycled water supply and no indirect recycled water use projected for the City.

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Submittal Table 4-1 contains a summary of the City’s water demand in AF by use type for the calendar year 2025. Approximately 70% of the City’s metered water use in 2025 (excluding non-revenue water) was residential use. Commercial/Institutional, industrial, and landscape irrigation account for the remaining 30% of water demands.

Table 4-1 Retail: Demands for Potable and Raw Water – Actual 2025 Table 4-1 Retail: Demands for Potable and Raw Water – Actual 202510 Use Type 2025 Actual
Additional Description
(as needed)
Level of Treatment
When Delivered Volume
Single Family Potable 3,464
Multi-Family Potable 1,021
Commercial Potable 854
Institutional/Governmental Potable 457
Industrial Potable 1
Landscape Includes Parklands Potable 677
Other Potable Fireline Potable 7
Distribution System Water
Loss Potable 1,489
TOTAL 7,970

4.3 Projected Water Use
Demand projections were based on existing use data as well as projected land use, population, economic growth, and future passive and active conservation measures (baseline conservation). Baseline conservation assumes the implementation of future passive measures affecting new developments, including compliance with the State Model Water Efficient Landscape Ordinance, plumbing code efficiencies for toilets, and expected plumbing code requirements for high-efficiency clothes washers.

Demand Projection Methodology
To increase the accuracy of future demand projections, a water demand base-year was chosen to be the 2025 water use by user class. Available SCAG demographic population projections were used to drive the forecast. The major focus was on single-family (SF) and multifamily (MF) residential demand as the primary water demand in the City, given that (1) residential demand comprises roughly two-thirds of total consumption in most years and (2) the remaining commercial/institutional/industrial (CII) and landscape irrigation demands have been relatively consistent over the years. 10 Demands are based on the City's billing records for the period from January 1, 2025 through December 31, 2025.

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The base-year SF & MF residential demand and the associated indoor and outdoor per capita water usage demand factors for existing and new housing can therefore be calculated as follows:
 From Table 4-1, 4,485 AFY or 1,461 MGY. This demand was then divided by the total number of residential housing units (14,74611) and by 365 days per year, resulting in a demand of 273 gallons per day (gpd) per housing unit.
 To conform with the water efficiency standard prior to 2025, the existing baseline indoor water use was estimated to be 55 gallons per capita per day (GPCD) applied to the estimated 3.5 people per unit12 per residential housing unit (for both SF and MF housing).  Assuming the breakdown between SF and MF is 77.2% and 22.8%, respectively  SCAG projects an increase of 3,954 households in El Centro by 2050 (from 14,746 in 2025 to 18,700 in 2050).13 This is an increase of approximately 21% in total households over the next 25 years. These new housing units will all have to comply with new water efficiency standards as described below. Therefore, by 2050, 79% of all housing will be comprised of existing housing and 21% will be new housing.
 Assume the percentages of existing vs. new housing will gradually ramp up in a linear manner, from 100% existing housing and 0% new housing in 2025 to 79% existing (i.e., built prior to 2025) non-water efficient housing and 21% new water efficient housing by 2050. This linear increase equates to constructing approximately 791 new housing units every five years.  Per 2021 SCAG demographic data, 98.8% of all housing in El Centro was constructed prior to 201014 and therefore does not meet current water efficiency standards.  For purposes of estimating future demand projections, it will be assumed that all current housing (i.e., 100%) does not meet current new housing water efficiency standards; however, all new housing built over the next 25 years will meet the new standards. Using the 791 new housing units per five-year cycle referenced above yields an existing vs. new housing split as shown in Table 4- 2A.
11 Per SCAG Final RHNA Methodology Data Appendix, adopted by the SCAG Regional Council on March 5, 2020 - https://scag.ca.gov/sites/main/files/file-attachments/scag-final-rhna-data-appendix-030520.pdf?1602189406 (refer to third page of the 240 page file)
12 Per SCAG Profile of the City of El Centro, May 2019 - https://scag.ca.gov/sites/main/files/fileattachments/elcentro_localprofile.pdf?1605653707 (refer to page 3). 13 Per SCAG 6th Cycle Regional Housing Needs Assessment (RHNA) adopted on March 4, 2021- https://scag.ca.gov/rhna (Refer to file labeled RHNA Final Allocation Calculator).
14 Per SCAG’s April 2021 Pre-Certified Local Housing Data Report for the City of El Centro - https://scag.ca.gov/sites/default/files/old/file-attachments/el-centro-he-0421.pdf?1620798251=.

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Table 4-2 A: Projected Existing vs. New Housing Split in El Centro (2025 – 2050) Table 4-1 D: Projected Existing vs. New Housing Split in El Centro (2025 – 2050) Year
Existing
Housing Units
in 2025
New Housing
Units Added
Since 2025
Total Housing
Units
Existing
Housing % of
Total Housing
New Housing
% of Total
Housing
2025 14,746 0 14,746 100% 0%
2030 14,746 791 15,537 94.9% 5.1%
2035 14,746 1,582 16,328 90.3% 9.7%
2040 14,746 2,372 17,119 86.1% 13.9%
2045 14,746 3,164 17,910 82.3% 17.7%
2050 14,746 3,955 18,700 78.9% 21.1%
 As noted above, the 2025 baseline demand for the combined SF and MF housing units is 4,485 AF (or 1,461 MG). Given that the population in 2025 was 46,029, the average residential per capita usage for 2025 was therefore (1,461 MG)/46,029)/365 days/year = 87.0 GPCD.  To comply with current water efficiency standards, a further reduction in the indoor water usage demand for existing housing from 55 GPCD to 52.5 GPCD, will be assumed for the five years after 2030, with a further reduction to 50 GPCD for indoor water usage all years after 2035. These assumptions yield the following total per capita usage factors:
o For 2030, 87.0 GPCD;
o For 2035, 84.5 GPCD (87.0 – 2.5); and
o For 2040-2050, 82.0 GPCD (87.0 – 5.0).
 For all new housing units, a 50 GPCD indoor water usage demand factor will be assumed for all years going forward.
 The total outdoor usage demand for existing housing can be calculated by subtracting the indoor demand from the overall demand. That yields an outdoor demand of 32.0 GPCD (87.0 – 55). It is assumed this demand will remain constant through 2050.
 For all new housing, the indoor demand factor will be set at 50 GPCD, while the outdoor demand factor will reflect a 25% reduction from that of existing housing, thus conforming with water efficiency standards for new housing. This results in a total demand factor for new housing of 75.4 GPCD (50 + [0.75]) x [33.9]). This factor will be applied to all new housing constructed through 2050.

In summary:
 Total Existing Housing Residential Per Capita Usage through 2030 (from above) = 87.0 GPCD.  Total Existing Housing Residential Per Capita Usage from 2030 to 2035 = 84.5 GPCD.

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 Total Existing Housing Residential Per Capita Usage after 2035 = 82.0 GPCD  Total New Housing Residential Per Capita Use for 2030-2050 = 75.4 GPCD.

The City’s CII and landscape irrigation demands reflected in Table 4-2 assumed a 2025 base year and then increased them annually by the SCAG projected population increases between 2025 and 2050. Total and individual demands are as follows (the percentage breakdown between Commercial and Institutional/Governmental was assumed to be the same in 2019 (when no breakdown was available) as it was in 2018):
 Total CII + Landscape Demand = 854 AF + 457 AF + 1 AF + 677 AF = 1,989 AF  Total Commercial Base Year Demand = 854 AF
 Total Institutional/Governmental Base Year Demand = 457 AF  Total Industrial Base Year Demand = 1 AF
 Total Landscape Irrigation Base Year Demand = 677 AF
Projected distribution system losses were set equal to the average losses over the past five years (2020- 2024) of 13.4% as shown in Table 4-4A.
25-Year Projections
A key component of the 2025 UWMP is to provide insight into the City’s future water demand outlook. The City’s current potable demand (Table 4-1) is met entirely through raw water imported from IID. Water use was projected in five-year increments through 2050 for a 25-year planning horizon and is shown in Table 4-2. The projection was extended past the required 20-year horizon to bridge the gap in data between UWMP cycles. Submittal Table 4-2 is a projection of the City’s potable and raw water demand in AF for the next 25 years.

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Table 4-2 Retail: Demands for Potable and Raw Water – Projected (AFY) Table 4-2 Retail: Use for Potable and Non-Potable Water - Projected15 Use Type Additional
Description
Projected Water Use
2030 2035 2040 2045 2050
Single Family 3,480 3,536 3,592 3,744 3,896
Multi-Family 1,026 1,042 1,059 1,104 1,148
Commercial 860 883 904 924 944
Institutional/Government 460 473 484 494 507
Industrial 1 1 1 1 1
Landscape 682 700 716 732 749
Fireline 0 0 0 0 0
Distribution Losses 1,007 1,027 1,045 1,083 1,121
Total 7,516 7,662 7,801 8,082 8,366
Distribution losses are assumed to equal the average water loss over the past 5 years (2020 through 2024) of 13.4% based on Water Loss Audits. The demand data presented in this section accounts for passive and active savings in the future. Passive and active savings are anticipated to continue for the next 25 years and will result in continued water saving and reduced consumption levels. Confirmation that future water savings and demands for lower income households are included in demand projections is provided in Submittal Table 4-3.

Table 4-3: Inclusion in Water Use Projections
Table 4-5 Retail Only: Inclusion in Water Use Projections Are Future Water Savings Included in Projections? Yes
Section or page number where citations of the codes,
ordinances, etc., utilized in demand projections are found. Section 4.3 and Chapter 9 Are Lower Income Residential Demands Included in Projections? Yes

4.4 Preceding Five-Year Water Loss Audit Reporting
Water loss audits have been conducted annually since 2015 using AWWA methodology. These audits are intended to allow the City to better understand the relation between water loss and revenue losses. The methodology used in these audits was developed by the IWA Water Loss Task Force for universal 15 Demand projections are based on the population increases referenced in Table 3-1B, with applied residential conservation as described in Section 4.3.1 (Demand Projection Methodology).

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application to any water distribution system. The AWWA audit methodology meets the requirements of SB 1420 signed into law in September 2014. Understanding and controlling water loss from a distribution system is an effective way for the City to achieve regulatory standards and manage their existing resources.

The volume of water loss over the past five years (2020-2024), as quantified in Table 4-5A, averaged 13.4 percent as a percent of total supply. As shown in Table 4-5A, water losses have increased since 2020. The City is actively administering programs to reduce water loss including replacing old water meters with an AMR/AMI (Automatic Meter Reading/Advanced Metering Infrastructure) system, routine system maintenance, and pipeline replacement projects. The City of El Centro 2026 Water Master Plan Update identified 5.5 miles in pipeline replacement due to condition and capacity deficiencies.

Table 4-5A: Inclusion in Water Use Projections
Table 4-4A: Water Loss Audit Reporting Data
Reporting Period Water Supplied Volume of Water Loss % Water Loss 2020 7,580 473 6.20%
2021 8,268 1,316 16.00%
2022 8,441 1,379 16.30%
2023 7,665 907 11.80%
2024 8,044 1,340 16.70%
AVERAGE 2020-2024 8,000 1,083 13.40%
Submittal Table 4-5 confirms that the City has submitted the required Water Loss Audit Reports to DWR and provides a link to the WUEdata portal where the City reports can be found. The water loss quantification worksheet is based on the water system balance methodology developed by AWWA and approved by DWR through a public process. The individual water loss audit reports for each of these five years are included in Appendix F.

Table 4-5: Last Five Years of Water Loss (Non-Revenue Water) Reporting Table 4-5: Water Loss Audit Reporting
Public Water System ID # Reporting
Period
Submitted to DWR Water
Loss Audit Program (yes/no)
CA1310004
2020 Yes
2021 Yes
2022 Yes
2023 Yes
2024 Yes
NOTES: Water Loss Audit Reports may be found on the WUEdata Portal at the following link: https://wuedata.water.ca.gov/awwa_plans

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Signed in 2018 and adopted in 2024, the "Making Conservation a California Way of Life" legislation (SB 606 and Assembly Bill 1668) establishes a new framework for long-term improvements in urban water use efficiency and drought planning as California adapts to climate change impacts. Under the regulation, suppliers must annually calculate Urban Water Use Objectives based on standards applied at the service area scale, including the Water Loss Performance Standard developed by the State Water Resources Control Board to minimize water waste through system leaks. The Water Loss Performance Standard requires that suppliers must meet the real water loss standard and apparent water loss standard by 2028.

Submittal Table 4-6 presents the City's progress towards compliance with the 2028 Water Loss Standard, as of the time of writing this UWMP. The most recent American Water Works Association (AWWA) Water Loss Audit for CY 2024 was utilized for the calculations presented. As discussed above, the City is actively administering programs to reduce water loss. Additionally, the City is in the process of requesting an update to the Water Loss Standard calculated by the State Water Board to appropriately reflect the age of the City’s distribution system.

Table 4-6: Progress Towards 2028 Water Loss Standard
Progress Towards 2028 Water Loss Standard.

Real Water Loss
State Water Board
Standard
Most Recent AWWA Water Loss Audit
Real Water Loss Per
Connection per Day 2028 Real Water Loss
Standard per
Connection per day
Number of
Connections
Volume of Total Real
Loss (AF)

14.9 10,056 1,101 97.7
Apparent Water Loss
State Water Board
Standard Most Recent AWWA Water Loss Audit
Apparent Water Loss
Per Connection per
Day 2028 Apparent Water
Loss Standard per
Connection per Day
Number of
Connections
Volume of Total
Apparent Loss (AF)

9.1 10,056 239 21.2
NOTES: Uses the Water Board’s calculated water loss standards updated 1/30/26 and AWWA Water Loss Audit for CY 2024. Connection count differs from what is reported in Table 2-1 for CY 2025.

4.5 Water Use for Lower Income Households
The UWMP Act requires retail water suppliers to include water use projections for single-family and multifamily residential housing for lower income and affordable households. Identifying these needs will assist the City in complying with the requirement under Government Code Section 65589.7 granting priority for

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providing water service to lower income households. SCAG has defined lower income households as earning below 80 percent of the median household income (MHI) for the County. MHI is also sometimes referred to as HAMFI (Housing Urban Development Area Median Family Income) or simply as AMI (Area Median Income). These terms were originally developed by the US Department of Housing and Urban Development.

For planning and funding purposes, the State Department of Housing and Community Development (HCD) categorizes households into the following five income groups based on the County Area Median Income (AMI):
• Extremely Low Income – up to 30 percent of AMI
• Very Low Income – 31 to 50 percent of AMI
• Low Income – 51 to 80 percent of AMI
• Moderate Income – 81 to 120 percent of AMI
• Above Moderate Income – Greater than 120 percent of AMI Combined, extremely low, very low, and low income households are often referred to as lower income households.

State Housing Element law requires that a local jurisdiction accommodate a share of the region’s projected housing needs for the planning period. This share, called the Regional Housing Needs Allocation (RHNA), is important because State law mandates that a jurisdiction provide sufficient land to accommodate a variety of housing opportunities for all economic segments of the community. Compliance with this requirement is measured by the jurisdiction's ability in providing adequate land with adequate density and appropriate development standards to accommodate the RHNA. As the regional planning agency, SCAG is responsible for allocating the RHNA to individual jurisdictions within the region.

The Regional Housing Needs Assessment (RHNA) assists jurisdictions in updating their General Plan Housing Elements. The RHNA identifies housing needs and assesses households by income level using several major data sources including 2010 Census, 2013-2017 American Community Survey, California Department of Finance (DOF), California Employment Development Department (EDD), existing and General Plan Land Use Element, and SCAG growth forecasts. The sixth cycle of the RHNA covers the planning period of October 2021 to October 2029. SCAG approved and adopted the 6th Cycle Final RHNA Plan on March 4, 2021. The California Department of Housing and Community Development concluded the housing elements and data submitted by jurisdictions in the SCAG region met statutory requirements for the assessment of current housing needs and approved the plan on March 22, 2021.

Table 4-6A presents the household distribution within the City of El Centro based on AMI. The data indicates

50.5% of the City’s housing falls within the three lower income categories.

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Table 4-6A: Household Distribution Based on Area Median Income (AMI) Table 4-6 A: Household Distribution Based on Area Median Income (AMI) Income Categories
SCAG
2020
Data16
SCAG 2021
Adopted
RHNA Data17
Revised Figures
with RHNA
Extremely Low Income (< 30% of AMI) 2,180
1,001 3,054
Very Low Income (< 50% of AMI) 2,053
Low Income (50%-80% of AMI) 1,970 490 2,460
Moderate Income (80% - 120% of AMI) 1,014 462 1,476
Above Moderate Income (> 120% of AMI) 5,065 1,489 6,554 Total Households 12,282 3,442 13,544
SCAG assigned 3,442 housing units in the City of El Centro as part of its final 6th Cycle RHNA allocation for the 2021-2029 planning period.18 Of these designated units, 1,491 or 43.3% were Low Income units.

Table 4-6B provides the projected water needs for lower income single family and multifamily residential units. The projected water demands shown here represent 50.5 percent of the total projected water demand for the single-family and multifamily categories provided in Table 4-2. For example, the total lower income single-family residential demand is projected to be 1,757 AFY in 2030 and 1,967 AFY in 2050.

Table 4-6B: Projected Water Demands for Lower Income Households (AF) Table 4-6 B: Projected Water Demands for Lower Income Households (AF) Water Use Sector
Fiscal Year Ending
2030 2035 2040 2045 2050
Total Residential Demand 4,506 4,578 4,651 4,848 5,044
SFR Demand-Lower Income Households 1,757 1,786 1,814 1,891 1,967 MFR Demand-Lower Income Households 518 526 535 558 580
Total Lower Income Household Demand 2,276 2,312 2,349 2,448 2,547 16 Per SCAG’s August 2020 Pre-Certified Local Housing Data Report for the City of El Centro – https://scag.ca.gov/sites/default/files/old/file-attachments/el-centro-he-0421.pdf?1620798251 18 Per SCAG’s 6th Cycle RHNA adopted on March 4, 2021 and approved by CA DCH on March 22, 2021 - https://scag.ca.gov/sites/main/files/file-attachments/6th-cycle-rhna-final-allocation-plan.pdf?1616462966

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4.6 Climate Change Considerations
Changing climate patterns are expected to shift precipitation patterns and affect water supply.

Unpredictable weather patterns will make water supply planning more challenging. The areas of concern for California include a reduction in Sierra Nevada Mountain snowpack, increased intensity and frequency of extreme weather events, and rising sea levels causing increased risk of Delta levee failure, seawater intrusion of coastal groundwater basins, and potential cutbacks on the SWP and Central Valley Project (CVP). The major impact in California is that without additional surface storage, the earlier and heavier runoff (rather than snowpack retaining water in storage in the mountains), will result in more water being lost to the ocean. A heavy emphasis on storage is needed in the State of California.

Given the City of El Centro imports 100% of its water supply from IID and the Colorado River, the future impacts of climate change on the Colorado River Basin are of more concern to the City than the SWP or the CVP water supply infrastructure. Colorado River Basin supplies have been inconsistent since about the year 2000 with the U.S. Bureau of Reclamation estimating the 25-year period from 2000 to 2025 was the driest period in more than 100 years of record keeping. Climate models are predicting a continuation of this pattern whereby hotter and drier weather conditions will result in continuing lower runoff. The current operational guidelines that govern operations on the Colorado River expire in 2026 and negotiations to replace them remain ongoing. California will likely be required to reduce its supplies from the Colorado River, on average, under the new guidelines.

Climate change impacts have been analyzed by IID to understand the regional impacts within the service area and forecast the impacts climate change may have on the state’s and IID’s water resources. A study completed for IID found that by 2050 some likely climate changes for the Imperial Regional Water Management Plan (IRWMP) region include milder winters, warmer maximum temperatures for spring and fall, and hotter summers. As water resources are also affected by water demands, these forecasts of warmer climates point to the likely increase in demand.

However, as the Imperial Valley’s climate changes, so do the measures and preparations by IID. IID has continually and proactively tracked water usage and continues to implement their Water Conservation Plans. Furthermore, IID’s distribution system includes seven regulating and four interceptor reservoirs with a total water storage capacity of 4,372 acre-feet. These reservoirs allow increased delivery flexibility and provide conservation opportunities within the IID water service area. By implementing extraordinary conservation projects, developing innovative efficiency measures and utilizing progressive management tools, IID is working to ensure both the long-term viability of agriculture and the continued protection of water resources within its water service area. IID’s Colorado River water entitlement is significant, and as the agency in charge of these water rights IID continues to responsibly manage its Colorado River water supply and related resources.

Due to IID’s historic water rights, reductions in Colorado River water supply would be absorbed by junior water rights holders prior to affecting IID’s supply and the Imperial Region. Consequently, climate change poses a limited direct threat to the volume or timing of IID and Imperial Region water supply from the Colorado River. Since supply has been determined to not be an issue for the City due to its reliance on IID, focuses within the UWMP are shifted to climate change’s impact on user consumption. Water demand may increase in times of drought due to increased irrigation, and general and prolonged heat waves will also increase water usage in heat-related cooling activities like irrigation, pool use, and general consumption.

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However, during these times, conservation measures are typically put in place decreasing use and generally establishing a return to normalcy of what water consumption would be.

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5 CONSERVATION TARGET COMPLIANCE
The Water Conservation Act of 2009, also known as Senate Bill (SB)x7-7, signed into law on February 3, 2010, mandated a 20 percent reduction in urban per-capita water use across California by 2020. To achieve this goal, the Act required each retail water supplier to establish an urban water-use target, contributing to the State's collective efforts. The Legislature stated that the combined reductions from all retail suppliers would fulfill the statewide legislative mandate.

The goal of this chapter is for the City to report on its progress toward meeting its urban water-use targets in their Urban Water Management Plan (UWMP), pursuant to Water Code Section 10608.40. The City is required to comply with SB X7-7 individually or as a region in collaboration with other retail water suppliers.

The City is not part of a regional alliance and is required to comply with SB X7-7 individually or demonstrate they have a plan or have secured funding to comply, in order to be eligible for water related state grants and loans.

5.1 Reporting Requirements
The City’s established urban water-use target reported in the 2020 UWMP is equal to 198.2 GPCD. The 2020 UWMP demonstrated compliance with the final 2020 water use target. The City met the state's 20 percent by 2020 mandate by coordinating conservation efforts and by funding and implementing water use efficiency programs. The City is required to report its results in the UWMP. The City has complied with the SB X7-7 2020 Target as shown in Submittal Table 5.1. A discussion of programs implemented to support the achievement of the City's per capita water reduction goals is covered in Chapter 9, Demand Management Measures, of this UWMP.

Table 5-1: SBx7-7 Target Progress
SBx7-7 2020 Target Progress
Was Supplier part
of a merger or
consolidation since
2020?
Regional
Alliance Target
or Individual
Target?
2020
Target
Actual
2020
GPCD
Did Supplier
Achieve Targeted
Reduction for
2020?
No Individual Target 198.2 148 Yes
NOTES: 2020 Target and Actual 2020 GPCD from 2020 UWMP, SB X7-7 Compliance Form.

5.2 Regional Alliance
A retail supplier may choose to meet the SBx7-7 targets on its own, i.e., individually, or as part of a regional alliance formed with other retail suppliers. The City of El Centro is not participating in a regional alliance and is reporting compliance individually.

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6 WATER SUPPLY CHARACTERIZATION
Surface water imported from the Colorado River by IID is the primary water supply for the Imperial Region and the sole water supply for the City of El Centro. Colorado River water is used to meet all current agricultural and non-agricultural water demands in the IID water service area.

Rainfall is less than three inches per year and does not contribute to IID water delivery, although at times it does increase or reduce agricultural water demand. Groundwater in the Imperial Valley is of poor quality and is generally unsuitable for domestic or irrigation purposes, though some is pumped for industrial (geothermal) use.

6.1 Purchased Imported Water
All water supply for the City of El Centro is imported Colorado River water purchased from IID.

Approximately 97 percent of IID imported Colorado River water is used for agriculture in the Imperial Valley.19 However, non-agricultural water use is projected to increase as municipal water demand continues to rise due to population growth; as industrial (renewable energy) water demand increases due to increased geothermal energy production; and as feedlot, dairy, fishery, environmental and recreation uses all continue to increase.

Colorado River Rights
IID’s rights to appropriate Colorado River water are long-standing and the District holds legal title to all of its water and water rights in trust for landowners within the District.20 Beginning in 1885, a number of individuals, as well as the California Development Company, made a series of appropriations of Colorado River water under California law for use in the Imperial Valley. Pursuant to then-existing California laws, these appropriations were initiated by the posting of public notices for approximately 7 million acre-feet per year (MAFY) at the point of diversion and recording such notices in the office of the county recorder.

The individual appropriations were subsequently assigned to the California Development Company, whose entire assets, including its water rights, were later bought by the Southern Pacific Company. On June 22, 1916, the Southern Pacific Company conveyed all its water rights to IID.

IID’s predecessor water right holder made reasonable progress in putting its pre-1914 appropriative water rights to beneficial use. By 1929, the beneficial use was 424,145 acres out of the Imperial Valley’s approximately one million irrigable acres.

Colorado River water rights are governed by numerous compacts, state and federal laws, court decisions and decrees, contracts, and regulatory guidelines collectively known as the “Law of the River.” Together, these documents allocate the water, regulate land use, and manage the Colorado River water supply among the seven basin states and Mexico. The following legal and regulatory documents are among those that have significant bearing on IID.
19 Source: https://www.iid.com/water#:~:text=Of%20the%20water%20IID%20transports,top%2010%20agricultural%20regions%20nationwide 20 CWC §20529 and §22437; Bryant v. Yellen, 447 U.S. 352, 371 (1980), fn.23 - https://www.loc.gov/item/usrep447352/

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6.1.1.1 Colorado River Compact (1921)
With the authorization of their legislatures and at the urging of the federal government, representatives from the seven Colorado River basin states began negotiations regarding the distribution of water from the Colorado River in 1921. In November 1922, an interstate agreement, the Colorado River Compact, was signed by the representatives giving each basin perpetual rights to annual apportionments of 7.5 MAFY of Colorado River water. Arizona signed the Compact in 1922 but did not ratify it until 1944. Even after they ratified the Compact, they pursued litigation against the State of California, which eventually resulted in the United States Supreme Court granting Arizona 46% of the water in the Colorado River Basin (see Arizona v. California US Supreme Court Decision (1964, 1979) in Section 6.1.1.4.) The seven basin states (Wyoming, Colorado, Utah, Nevada, New Mexico, Arizona, California and Mexico) as well as the geographic location of the Upper and Lower Colorado River Basins are depicted in Figure 6-

1.21 6.1.1.2 Boulder Canyon Project Act (1928)
California was apportioned 4.4 MAFY out of the lower basin allocation of 7.5 MAFY, plus 50 percent of any available surplus water as a result of the Boulder Canyon Project Act, which Congress authorized in 1928, the California Limitation Act, and the Secretary’s contracts with the California water users.

The Secretary entered into contracts with California right holders to further apportion California’s share of Colorado River water and entered into a permanent service water delivery contract with IID on December 1, 1932. The District undertook to pay the cost of the works (Imperial Dam and the All-American Canal) and to include within itself certain public lands of the United States and other specific lands. The United States undertook to deliver to the Imperial Dam the water that would be carried by the new canal to the various lands to be served by it. IID’s contract with the Secretary incorporated the provisions of the Seven-Party Agreement. IID’s contract has no termination date. It is a contract for permanent water service.

6.1.1.3 California Seven-Party Agreement (1931)
On November 5, 1930, the Secretary of the Interior requested the California Division of Water Resources to recommend a proper method of apportioning the water that California was entitled to receive under the 1922 Colorado River Compact and the Boulder Canyon Project Act. Thereafter, a number of users and prospective users of Colorado River water entered into the Seven-Party Agreement on August 18, 1931.

As a result of the Seven-Party Agreement, IID agreed to limit its California pre-1914 appropriative water rights in quantity and priority to the apportionments and priorities contained in the Seven-Party Agreement.

The California Seven-Party Agreement (condensed and summarized in Table 6-0A) states:
“The Division of Water Resources to, in all respects, recognize said apportionments and priorities in all matters relating to State authority and to recommend the [apportionment and priority provisions] to the Secretary of the Interior of the United States for insertion in any and all contracts for water made by him (sic) pursuant to the terms of the Boulder Canyon Project Act.” 21 Source: https://www.usbr.gov/lc/region/programs/crbstudy/finalreport/index.html

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Figure 6-1: Colorado River Basin States

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Table 6-0 A: Seven-Party Agreement for Apportionments and Priorities Table 6-0 A: Seven-Party Agreement for Apportionments and Priorities22 Priority
Order
Description Annual
Apportionment
(Acre-feet)
Annual Present Perfected
Rights (PPRs) (Acre-feet)
1 Palo Verde Irrigation District – for use exclusively on a gross area of 104,500 acres of land within and adjoining the district
3,850,000 219,790
(or consumptive use for
33,604 acres)
2 Yuma Project (Reservation District) – for use on
California Division, not exceeding 25,000 acres of land 38,270
(or consumptive use for
6,294 acres)
3a Imperial Irrigation District - for use on lands served by All-American Canal in Imperial and Coachella Valleys
2,600,000
(or consumptive use for
424,145 acres) - (IID only)
3b Palo Verde Irrigation District – for use exclusively on an additional 16,000 acres of mesa lands
4 Metropolitan Water District and/or City of Los Angeles and/or others – for use by themselves and/or others on
Southern California coastal plain
550,000
Subtotal 4,400,000
5a Metropolitan Water District and/or City of Los Angeles and/or others on coastal plain
550,000
5b City and County of San Diego 112,000
6a Imperial Irrigation District - lands served by the AllAmerican Canal (AAC) in Imperial and Coachella Valleys 300,000 6b Palo Verde Irrigation District – for exclusive use on 16,000 acres of mesa lands
Total 5,362,000
7 California Agricultural Use - Colorado River Basin lands in California
All remaining
available water
IID State Applications and Permits
Following execution of the Seven-Party Agreement, IID filed eight applications with the California Division of Water Rights between 1933 and 1936 to appropriate water pursuant to the California Water Commission Act. These applications each reserved the pre-1914 appropriative rights. However, the applications also incorporated the terms of the Seven-Party Agreement (Table 6-0A), including the priority and apportionment parameters into IID’s California appropriative applications. Permits were granted on the applications in 1950.

Subordination by Coachella Valley Water District
Coachella Valley Water District (CVWD) was formed in 1918 to protect and conserve local water sources.

At the time IID entered into its contract with the Secretary of the Interior, it was anticipated the lands to be served with Colorado River water in the Coachella Valley to the north would also become a part of IID.

However, Coachella farmers eventually decided they preferred to have their own delivery contract with the 22 Source: https://www.iid.com/home/showpublisheddocument?id=16799 (refer to page 45)

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Secretary, and an action was brought by the CVWD to protest IID’s court validation of the 1932 IID water service and repayment contract with the Secretary of the Interior.

In 1934, IID and CVWD executed a compromise agreement that paved the way for CVWD to have its own contract with the Secretary, and which provided that CVWD would subordinate its Colorado River entitlement, in perpetuity, to IID’s entitlement. That is, within the third, sixth, and seventh priority order (Table 6-0 A), as set forth in the Seven-Party Agreement and California water delivery contracts, IID water use takes precedence over CVWD use. As a practical matter, under Priority 3, CVWD receives what is left of 3.85 MAFY after Palo Verde Irrigation District, Yuma Project, and IID uses are deducted.

In summary, when California is limited to 4.4 MAFY of Colorado River water, IID has senior water rights established under state law in the amount of 3.85 MAFY minus the amounts used by Priorities 1 and 2.

6.2 IID Present Perfected Rights, and Arizona v. California US Supreme Court Decision (1964, 1979)
The term “present perfected rights” first appeared in the Colorado River Compact executed on November 24, 1922. The Compact provided that present perfected rights to the beneficial use of waters of the Colorado River system are unimpaired by this Compact. The Boulder Canyon Project Act, Section 6, effective on June 25, 1929, recognized and protected these rights by providing, “the dam and reservoir ... shall be used; second, for irrigation and domestic uses and satisfaction of present perfected rights in pursuance of Article VIII of said Colorado River Compact ...” Pursuant to the terms of the Boulder Canyon Project Act, California’s 4.4 MAFY of mainstream water was to be used to satisfy “any rights which existed on December 21, 1928.” Such rights included present perfected rights within IID’s pre-1914 state-law appropriative rights.

The 1964 Supreme Court decision settled a 25-year disagreement between Arizona and California that stemmed from Arizona’s desire to build the Central Arizona Project to enable use of its full apportionment.

California’s argument was that as Arizona used water from the Gila River, which is a Colorado River tributary, it was using a portion of its annual Colorado River apportionment. An additional argument from California was that it had developed a historical use of some of Arizona’s apportionment, which, under the doctrine of prior appropriation, precluded Arizona from developing the project. California’s arguments were rejected by the U.S. Supreme Court. Under direction of the Supreme Court, the Secretary was restricted from delivering water outside of the framework of apportionments defined by law. Preparation of annual reports documenting consumptive use of water in the three lower basin states was also mandated by the Supreme Court.

Although the United States Supreme Court in Arizona v. California defined “perfected right” and “present perfected rights” in its 1964 Decree, IID’s present perfected rights were not quantified until the Supreme Court issued a Supplemental Decree in 1979. That Supplemental Decree defined IID’s present perfected rights as a right to Colorado River water: “In annual quantities not to exceed (i) 2,600,000 acre-feet of diversions from the mainstream or (ii) the consumptive use required for irrigation of 424,145 acres and for the satisfaction of related uses, whichever of (i) or (ii) is less, with a priority date of 1901.” IID’s present perfected rights are very important because Article II(B)(3) of the Supreme Court Decree provides that in any year in which there is less than 7.5 MAF of mainstream water available for release for consumptive use in Arizona, California, and Nevada, the Secretary of the Interior shall first provide for the

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satisfaction of present perfected rights in the order of their priority dates without regard to state lines before imposing shortage cutbacks on other junior water right holders.

Colorado River Basin Project Act (1968)
In 1968, Congress authorized various water development projects in both the upper and lower basins, including the Central Arizona Project (CAP). Under the Colorado River Basin Act of 1968, priority was given to California’s apportionment over the CAP water supply in times of shortage. Also, under the act, the Secretary was directed to prepare long-range criteria for the Colorado River reservoir system in consultation with the Colorado River Basin states.

Quantification Settlement Agreement & Related Agreements (2003) With completion of a large portion of the Central Arizona Project (CAP) infrastructure in 1994, creation of the Arizona Water Banking Authority in 1996, and the growth of Las Vegas in the 1990s, California encountered increasing pressure to live within its Priority 1-4 rights of 4.4 MAFY under the Law of the River.

After years of negotiating among Colorado River Compact States and affected California water delivery agencies, the Quantification Settlement Agreement (QSA) and Related Agreements and associated documents (QSA/Transfer Agreements) were signed by the Secretary of Interior, IID, CVWD, Metropolitan Water District of Southern California (MWDSC, MWD or Metropolitan), the San Diego County Water Authority (SDCWA), and other affected parties on October 10, 2003.

The Quantification Settlement Agreement and Related Agreements (QSA/Transfer Agreements) are a set of interrelated contracts that resolve certain disputes among the United States, the State of California, IID, MWD, CVWD and SDCWA, for a period of 35 to 75 years, regarding the reasonable and beneficial use of Colorado River water; the ability to conserve, transfer and acquire conserved Colorado River water; the quantification and priority of Priorities 3(a) and 6(a)23 within California for use of Colorado River water; and the obligation to implement and fund environmental impact mitigation.

Conserved water transfer agreements between IID and SDCWA, IID and CVWD, and IID and MWD are all part of the QSA/Transfer Agreements. For IID, these contracts identify conserved water volumes and establish transfer schedules along with price and payment terms. As specified in the agreements, IID will transfer nearly 415,000 AF annually over a 35-year period (or longer), as follows:
to MWD 110,000 AF [modified to 105,000 AF in 2007],
to SDCWA 200,000 AF,
to CVWD and MWD combined 103,000 AF, and
to certain San Luis Rey Indian Tribes 11,500 AFY of water.

All of the conserved water will ultimately come from IID system and on-farm efficiency conservation improvements. In the interim, IID has implemented a Fallowing Program to generate water associated with 23 Priorities 1, 2, 3(b), 6(b), and 7 of current Section 5 Contracts for the delivery of Colorado River water in the State of California and Indian and miscellaneous Present Perfected Rights within the State of California and other existing surplus water contracts are not affected by the QSA Agreement.

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Salton Sea mitigation related to the impacts of the IID/SDCWA water transfer, as required by the State Water Resources Control Board, which ran from 2003 through 2017. In return for its QSA/Transfer Agreements programs and deliveries, IID receives payments totaling billions of dollars to fund needed efficiency conservation measures and to pay growers for conserved on-farm water, so IID can transfer nearly 14.5 MAF of water without impacting local productivity. In addition, IID will transfer to SDCWA 67,700 AFY annually of water conserved from the lining of the AAC in exchange for payment of lining project costs and a grant to IID of certain rights to use the conserved water. In addition to the 105,000 acre-feet of water currently being conserved under the 1988 IID/MWD Conservation Program, these more recent agreements define an additional 303,000 AFY to be conserved by IID from on-farm and distribution system conservation projects for transfer to SDCWA, CVWD, and MWD.

6.2.2.1 Colorado River Water Delivery Agreement (CRWDA)24 As part of the 2003 QSA/Transfer Agreements among California and federal agencies, the CRWDA was entered into by the Secretary of the Interior, IID, CVWD, MWD and SDCWA. The CRWDA involves the federal government because of the change in place of Colorado River water from the All-American Canal to the Colorado River Aqueduct.

The CRWDA lays out how the California 4.4 Plan will be met by quantifying for a specific term of years deliveries of certain Colorado River entitlements within shared priorities, so that transfers may occur. In particular, for the term of the CRWDA, quantification of Priority 3(a) is effected through caps on consumptive use measured at Imperial Dam for IID (3.1 MAFY) and CVWD (330 KAFY). Quantification of Priority 6(a) is effected through quantifying consumptive use amounts to be made available in order of priority to MWD (38 KAFY), IID (63 KAFY), and CVWD (119 KAFY) with the provision that any additional water available to Priority 6(a) be delivered under IID and CVWD existing water delivery contracts with the Secretary. The CRWDA also provides a source of water to effect a San Luis Rey (SLR) Indian Water rights settlement.

The CRWDA provides that the underlying water delivery contract with the Secretary remain in full force and effect. (Colorado River Documents 2008, pages 6-12 and 6-13).

Under the terms of the CRWDA, the Secretary of the Interior shall deliver IID’s Priority 3(a) consumptive use entitlement pursuant to Exhibit A (Table 6-0B); and an annual water consumptive use limit is imposed on IID, pursuant to Exhibit B (Table 6-0C). Additionally, the CRWDA satisfies the 2001 Interim Surplus Guidelines requirement that a quantification settlement agreement be adopted as a prerequisite to an interim surplus determination by the Secretary.
24 Source: 2003 CRWDA: Federal QSA. http://www.usbr.gov/lc/region/g4000/crwda/crwda.pdf

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Table 6-0 B: Delivery of Priority 3(a) Consumptive Use Entitlement to IID (CRWDA Exhibit A)
Table 6-0 B: Delivery of Priority 3(a) Consumptive Use Entitlement to IID (CRWDA Exhibit A) Delivered to (Entity) At (Point of Diversion) Amount Not-to-Exceed (AFY) CVWD Imperial Dam 103,000
MWD 25, 26 Lake Havasu 110,00031
SDCWA 27 Lake Havasu 56,200
SDCWA28 Lake Havasu 200,000
SLR29 See SLR note See SLR note
Misc. & Indian PPRs30 Current points of delivery 11,500 For benefit of MWD/SDCWA31 Lake Havasu 145,000
IID Imperial Dam Remainder
IID’s Priority 3(a) Total 3,100,000

6.2.2.2 Inadvertent Overrun Payback Policy (IOPP)
The CRWDA Inadvertent Overrun Payback Policy (IOPP), adopted by the Secretary contemporaneously with the execution of the CRWDA, provides additional flexibility to Colorado River management and applies to entitlement holders in the Lower Division States.
32 The IOPP defines inadvertent overruns as “Colorado
River water diverted, pumped, or received by an entitlement holder of the Lower Division States that is in excess of the water users’ entitlement for the year.” An entitlement holder is allowed a maximum overrun of 10 percent of its Colorado River water entitlement.

In the event of an overrun, the IOPP provides a mechanism to payback the overrun. When the Secretary has declared a normal year for Colorado River diversions, a contractor has from one to three years to pay back its obligation, with a minimum annual payback equal to 20 percent of the entitlement holder’s maximum allowable cumulative overrun account or 33.3 percent of the total account balance, whichever is greater. However, when Lake Mead is below an elevation of 1125 feet on January 1, the terms of the IOPP require that the payment of the inadvertent overrun obligation be made in the calendar year after the overrun is imported in the USBR Lower Colorado Region Colorado River Accounting and Water Use Report [for] Arizona, California, and Nevada (Decree Accounting Report).33 25 Agreement for Implementation of a Water Conservation Program and Use of Conserved Water dated Dec 22, 1988; Approval Agreement, dated Dec 19, 1989. Of amount identified: up to 90 KAFY to MWD and 20 KAFY to CVWD 26 By IID/MWD agreement, the 1988 IID/MWD transfer was fixed at 105 KAFY, beginning with calendar year 2007. 27 Water conserved from construction of a new lined canal parallel to the AAC from Pilot Knob to Drop 3. 28 Agreement for Transfer of Conserved Water, dated Apr 29, 1998, as amended. As set forth in Exhibit B (Table 5-4), delivery amounts shall be 205 KAF in calendar year 2021 and 202.5 KAF in calendar year 2022. 29 Water conserved from AAC lining and made available for benefit of SLR Parties under applicable provisions of PL 100-675, as amended. Quantity may vary, not to exceed 16 KAFY, as may point of diversion, subject to terms of Allocation Agreement. 30 Water to be delivered to misc. and Indian PPRs identified in the Decree in AZ v. CA, as supplemented. Delivery of water will be to current points of delivery unless modified in accordance with applicable law. 31 As provided in CRWDA subsection 4(g).
32 Source: USBR. 2003 Colorado River Water Delivery Agreement ROD. Section IX. Implementing the Decision A. Inadvertent Overrun and Payback Policy. Pages 16-19 of 34. http://www.usbr.gov/lc/region/g4000/crwda/crwda_rod.pdf . 7 Feb 2013. 33 Source: 2003 ROD CRWDA IOPP: http://www.usbr.gov/lc/region/g4000/crwda/crwda_rod.pdf

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Table 6-0 C: IID Net Consumptive Use Schedule 2003-2077 (KAF, CRWDA Ex. B) Table 6-0 C: IID Net Consumptive Use Schedule 2003-2077 (KAF, CRWDA Exhibit B)34 IID Quantification and Transfers, Volumes in KAF at Imperial Dam 35 Col 1 2 3 4 5 6 7 8 9 10 11
Year
IID Priority 3(a)
IID
Quantified
Amount
IID Reductions IID Net
Available for
Consumptive
Use
(Col 2 - 10)
1988
MWD
Transfer36
2 SDCWA
Transfer
AAC
Lining
Salton Sea
Mitigation
SDCWA
Transfer37
IntraPriority 3
CVWD
Transfer
MWD
Transfer w\
Salton Sea
Restoration38
4 Misc.

PPRs
IID Total
Reduction
(Σ Cols 3-9)39
5 2003 3,100 105.1 10.0 0.0 0.0 0.0 0.0 11.5 126.6 2,978.2 2004 3,100 101.9 20.0 0.0 15.0 0.0 0.0 11.5 148.4 2,743.9 2005 3,100 101.9 30.0 0.0 15.0 0.0 0.0 11.5 158.4 2,756.8 2006 3,100 101.2 40.0 0.0 20.0 0.0 0.0 11.5 172.7 2,909.7 2007 3,100 105.0 50.0 0.0 25.0 0.0 0.0 11.5 191.5 2,872.7 2008 3,100 105.0 50.0 8.9 26.0 4.0 0.0 11.5 205.4 2,825.1 2009 3,100 105.0 60.0 65.5 30.1 8.0 0.0 11.5 280.1 2,566.7 2010 3,100 105.0 70.0 67.7 33.8 12.0 0.0 11.5 294.8 2,540.5 2011 3,100 103.9 63.3 67.7 0.0 16.0 0.0 11.5 262.4 2,915.8 2012 3,100 104.1 106.7 67.7 15.2 21.0 0.0 11.5 326.2 2,903.2 2013 3,100 105,0 100.0 67.7 71.4 26.0 0.0 11.5 381.6 2,554.9 2014 3,100 104.1 100.0 67.7 89.2 31.0 0.0 11.5 403.5 2,533.4 2015 3,100 107.8 100.0 67.7 153.3 36.0 0.0 11.5 476.3 2,480.9 2016 3,100 105.0 100.0 67.7 130.8 41.0 0.0 11.5 456.0 2,504.3 2017 3,100 105.0 100.0 67.7 105.3 45.0 0.0 9.9 434.5 2,548.2 2018 3,100 105.0 130 67.7 0.1 63 0.0 11.5 377.3 2,722.8 201940 3,100 105.0 160 67.7 46.55 68 0.0 11.5 458.8 2,687.8 2020 3,100 105.0 193 67.7 0.0 73 0.0 11.5 450.2 2,649.8 2021 3,100 105.0 205 67.7 0.0 78 0.0 11.5 467.2 2,632.8 2022 3,100 105.0 203 67.7 0.0 83 0.0 11.5 470.2 2,629.8 2023 3,100 105.0 200 67.7 0.0 88 0.0 11.5 472.2 2,627.8 2024 3,100 105.0 200 67.7 0.0 93 0.0 11.5 477.2 2,622.8 2025 3,100 105.0 200 67.7 0.0 98 0.0 11.5 482.2 2,617.8 2026 3,100 105.0 200 67.7 0.0 103 0.0 11.5 487.2 2,612.8 2027 3,100 105.0 200 67.7 0.0 103 0.0 11.5 487.2 2,612.8 2028 3,100 105.0 200 67.7 0.0 103 0.0 11.5 487.2 2,612.8 ’29-37 3,100 105.0 200 67.7 0.0 103 0.0 11.5 487.2 2,612.8 ‘38-4741 3,100 105.0 200 67.7 0.0 103 0.0 11.5 487.2 2,612.8 ‘48-7742 3,100 105.0 200 67.7 0.0 5043 0.0 11.5 434.2 2,665.8 34 Source: CRWDA: Federal QSA Exhibit B, p 13; updated values from 2019 QSA Implementation Report 35 2003 through 2020 volumes are adjusted for actual USBR Decree Accounting values; IID Total Reduction and Net Available for Consumptive Use may not equal Col 2 minus Col 10, if IID conservation/use was not included in Exhibit B 36 2014 Letter of Agreement provides that, effective January 2016 total amount of conserved water available is 105 KAFY 37 Salton Sea Mitigation volumes may vary based on conservation volumes and method of conservation. 38 This transfer is not likely given lack of progress on Salton Sea restoration as of 2018; shared entries represent volumes that may vary.
39 Reductions include conservation for 1988 IID/MWD Transfer, IID/SDCWA Transfer, AAC Lining; SDCWA Transfer Mitigation, MWD Transfer w/Salton Sea Restoration (if any), and Misc. PPRs. Amounts are independent of increases and reductions as allowed by IOPP.
40 In order, to resolve the outstanding 2010 Salton Sea mitigation water pre-delivery issue, IID left 46,546 AF of extraordinary conservation in Lake Mead. See IID’s December 19, 2019 water order and Reclamation’s March 10, 2020 approval letter. 41 Assumes SDCWA does not elect termination in year 35. 42 Assumes SDCWA and IID mutually consent to renewal term of 30 years. 43 Modified from 100 KAFY shown in CRWDA Exhibit B; starting in 2018 MWD will provide CVWD 50 KAFY of the 100 KAFY.

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6.2.2.3 Impacts on Water Supply
The annual water consumptive use limit imposed by CRWDA Exhibit B (Table 6-0C) creates complicated accounting for both IID and USBR and is still evolving. The record included herein represents IID efforts to consolidate USBR and IID numbers. As IID works with USBR to develop consolidated accounting formats, the presentation of these values is likely to be refined and updated. The 3.1 MAFY cap and the water efficiency conservation and transfer programs present unique challenges as data prior to 2003 cannot always be compared or averaged with QSA/Transfer Agreements data absent additional data rectification or benchmarking.

As a result of the QSA/Transfer Agreements, IID will be able to more efficiently deliver Colorado River water to the Imperial Valley. Imperial Valley agricultural water users will also be able to use their irrigation water more efficiently, thus, preserving Imperial Valley agricultural output while reducing their use of Colorado River water. The voluntary on-farm efficiency conservation program will financially compensate participants for the water they conserve. USBR will not challenge reasonable and beneficial use under the 43 C.F.R.

Part 417 as long as IID participates in the QSA/Transfer Agreements; thus, the Imperial Valley will be able to rely on the senior rights to a large volume of Colorado River water that IID possesses.

In short, the QSA/Transfer Agreements ensure that IID will receive Colorado River water as scheduled in CRWDA Exhibit B (Table 6-0C) and provide the means to allow IID and the customers it serves to elevate their Colorado River water use to efficient 21st Century standards and ensure the continued availability of this precious supply, while meeting delivery obligations as shown in Table 6-0D.

The impact of the QSA/Transfer Agreements on the Region’s water supply is a limitation of the amount of Colorado River water available for delivery by IID to its customers. IID has agreed to 45 years of large-scale water conservation and transfer, increasing from 120,000 AFY in 2003, to 408,000 AFY in year 24 (2026).

From 2026 through 2047, the IID reduction is stabilized at 408,000 AFY. The conserved amounts are to be delivered to urban areas in California’s Colorado River and Southern Coast Hydrologic Regions. As shown in Table 5-5, the conserved water will be delivered (volumes at Imperial Dam), as follows:
• 105,000 AFY to MWD, can be reduced by up to 3.5 KAFY subject to tailwater return systems performance and potable projects potentially funded by MWD • 200,000 AFY to SDCWA
• 103,000 AFY to CVWD
• 11,500 AFY of Miscellaneous PPRs
These transfers are to be achieved within the 3.1 MAFY cap of Colorado River water and without reducing agricultural productivity; thus, increasing productive water use. Under the QSA/Transfer Agreements, IID delivered mitigation water to Salton Sea in calendar years 2003-2017. Mitigation is being implemented to address impacts throughout the region with particular focus on the Salton Sea.

Table 6-0D presents the amounts to be delivered and the recipients of the conserved water. Table 6-0E shows the conservation practice that is planned to be employed during the period of transition from fallowing to full conservation efficiency (2003 through 2017). The purpose of the fallowing is to provide mitigation water to the Salton Sea. From 2018 on, all of the transferred water can be from efficiency conservation, should IID and the customers it serves decide to follow that course.

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Table 6-0 D: IID Conserved and Mitigation Water Delivery Schedule 2003-2077 (KAF, CRWDA Exhibit B)
Table 6-0 D: IID Conserved and Mitigation Water Delivery Schedule 2003-2077 (KAF, CRWDA Exhibit B) Delivery to:

QSA
Year
Calendar
Year
MWD SDCWA Salton Sea
Mitigation
(SDCWA)
CVWD44 MWD Total
Delivery
1 2003 110 10 5 0 0 120
2 2004 110 20 10 0 0 130
3 2005 110 30 15 0 0 140
4 2006 110 40 20 0 0 150
5 2007 105 50 25 0 0 155
6 2008 105 50 25 4 0 159
7 2009 105 60 30 8 0 173
8 2010 105 70 35 12 0 187
9 2011 105 80 40 16 0 201
10 2012 105 90 45 21 0 216
11 2013 105 100 70 26 0 231
12 2014 105 100 90 31 0 236
13 2015 105 100 110 36 0 241
14 2016 105 100 130 41 0 246
15 2017 105 100 150 45 0 250
16 2018 105 130 0.1 63 0 298
17 2019 105 160 46.55 68 0 333
18 2020 105 192.5 73 2.5 373
19 2021 105 205 78 5.0 393
20 2022 105 202.5 83 2.5 393
21 2023 105 200 88 0 393
22 2024 105 200 93 0 398
23 2025 105 200 98 0 403
24 2026 105 200 103 0 408
25 2027 105 200 103 0 408
26 2028 105 200 103 0 408
27·45 2029·204745 105 200 103 0 408
46·75 2048·207746 105 200 50 0 355
44 Or MWD if CVWD declines to acquire
45 Assumes SDCWA does not elect termination in year 35 when its wheeling agreement with MWD ends 46 Assumes SDCWA and IID mutually consent to renewal term of 30 years - http://www.usbr.gov/lc/region/g4000/QSA/crwda.pdf

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Table 6-0 E: Compromise IID QSA Delivery Schedule, 2003-2017 (KAF) Table 6-0 E: Compromise IID QSA Delivery Schedule, 2003-2017 (KAF)47 Delivery for Transfer Conservation Practice
1 2 3 4 5 6 7 8
Year to
SDCWA
to
CVWD
Total Transfer
(Col 2+3) or (Col 5+6)
Efficiency for
Delivery
Fallowing for
Delivery
Fallowing for
Mitigation
Total
Fallowing
(Col 6+7)
2003 10 0 10 0 10 5 15
2004 20 0 20 0 20 10 30
2005 30 0 30 0 30 15 45
2006 40 0 40 0 40 20 60
2007 50 0 50 0 50 25 75
2008 50 4 54 4 50 25 75
2009 60 8 68 8 60 30 90
2010 70 12 82 12 70 35 105
2011 80 16 96 16 80 40 120
2012 90 21 111 21 90 45 135
2013 100 26 126 46 80 70 150
2014 100 31 131 71 60 90 150
2015 100 36 136 96 40 110 150
2016 100 41 141 121 20 130 150
2017 100 45 145 145 0 150 150
Total 1,000 240 1,240 540 700 800 1,500
Other Colorado River Operating Policies and Agreements
A number of other federal operating policies could affect IID diversions, deliveries, and operations, and influence the reliability of the Imperial Valley’s Colorado River supply under different hydrologic conditions as described in the following sections.

6.2.3.1 Criteria for Coordinated Long-Range Operation of Colorado River Reservoirs These Operating Criteria48 control operation of the Colorado River reservoirs in compliance with requirements set forth in the Colorado River Compact of 1922, the United States-Mexico Water Treaty of 1944, the Colorado River Storage Project Act of 1956, the Boulder Canyon Projects Act (Lake Mead) and the Colorado River Basin Project Act (Upper Basin Reservoirs) of 1968, and other applicable federal laws.49 Under these Operating Criteria, the Secretary of the Interior makes annual determinations published in the USBR Annual Operating Plan for Colorado River Reservoirs (discussed below) regarding the release of Colorado River water for deliveries to the Lower Basin States. A requirement to equalize active storage between Lake Powell and Lake Mead when there is sufficient storage in the Upper Basin is included in these operating criteria.
47 Source: https://www.iid.com/home/showpublisheddocument?id=9571 48 Criteria for Coordinated Long-Range Operation of Colorado River reservoirs Pursuant to the Colorado River Basin Project Act of September 30, 1967 (P.L. 90-537). June 8, 1970 – http://www.usbr.gov/lc/region/pao/pdfiles/opcriter.pdf 49 Source: USBR website: The Law of the River, for Operating Criteria and other agreements; http://www.usbr.gov/lc/region/g1000/lawofrvr.html

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6.2.3.2 Annual Operating Plan (AOP) for Colorado River Reservoirs Annual operating plans are developed in accordance with Section 602 of the Colorado River Basin Project Act (Public Law 90-537); the Criteria for Coordinated Long-Range Operations of Colorado River Reservoirs Pursuant to the Colorado River Basin Project Act of 1968, as amended, promulgated by the Secretary of the Interior; and Section 1804(c)(3) of the Grand Canyon Protection Act (Public Law 102- 575). 50As part of the AOP process, the Secretary makes determinations regarding the availability of Colorado River water for deliveries to the Lower Basin States, including when normal, surplus, and shortage conditions occur on the lower portion of the Colorado River.

6.2.3.3 Interim Guidelines for Lower Basin Shortages
Circumstances that triggered the need for the 2007 guidelines are described by the USBR, as follows. The Colorado River Upper Basin experienced a protracted multi-year drought which began in October 1999 and ended in 2010. In the summer of 1999, Lake Powell was essentially full, with reservoir storage at 97 percent of capacity. However, it became evident with precipitation totals at only 30 percent of average for October, November, and December that the stage was set for the low runoff that occurred in 2000.

In the late 1990s, inflow to Lake Powell was above average and the lake stayed full, from 1995 through 1999. As late as September 1999, Lake Powell was still 95 percent full. Inflow into Lake Powell from water years 2000 through 2004 was about half of what is considered average as shown in Table 6-0 F. The 2002 inflow was the lowest recorded (24%) since Lake Powell began filling in 1963. However, by 2005, unregulated inflow into Lake Powell was 118% of average, and then hovered between 78% and 81% for three of the next five years before peaking at 147% of average inflow in 2011, then dropping to 45% in 2012. Unregulated inflow to Lake Powell as a percent of average between 1981 and 2000 was 111.9%, but the average inflow dropped significantly between 2001 and 2020 to 80.4%.

Table 6-0 F: Unregulated Inflow to Lake Powell, 1981-2025 (Percent of Historic Average)
Table 6-0 F: Unregulated Inflow to Lake Powell, 1981-2025 (Percent of Historic Average)51 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990
52% 118% 188% 192% 162% 171% 124% 74% 55% 49%
1991 1992 1993 1994 1995 1996 1997 1998 1999 2000
81% 68% 133% 63% 147% 96% 157% 125% 118% 64%
2001 2002 2003 2004 2005 2006 2007 2008 2009 2010
65% 24% 57% 55% 118% 80% 81% 112% 94% 78%
2011 2012 2013 2014 2015 2016 2017 2018 2019 2020
147% 45% 47% 96% 94% 89% 110% 43% 120% 54%
2021 2022 2023 2024 2025
33% 52% 112% 67% 43%
50 For the AOPs, visit http://www.usbr.gov/lc/region/g4000/aop/ 51 Source: Data provided in an email dated May 4, 2021 from Heather Patno (USBR Hydraulic Engineer/Hydrologist) to Harvey Gobas (Gobas Engineering Management Services, Inc., subconsultant to Psomas in the preparation of this UWMP)

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Average 1981-1990 Average 1991-2000 Average 2001-2010 Average 2011-2020 Average 1981-2020 118.5% 105.3% 76.3% 84.5% 96.1%
Whether a drought exists is determined by comparison with normal hydrology for an area. Normal is defined as a long-term average of annual precipitation data, which may include droughts and extremely wet periods.

No single year will ever be normal due to the complexity of weather patterns. Because the occurrence of a drought affects this average, the definition of normal for the American Southwest, will be altered for the next several decades.

In the midst of the drought period, USBR developed the 2007 Interim Guidelines for Lower Basin Shortages and Coordinated Operations for Lake Powell and Lake Mead. By consensus, the seven Basin States selected the Preferred Alternative52 as the new basis for USBR operation of the reservoirs, determining that it best meets all aspects of the purpose and need for the federal action.

The 2007 Interim Guidelines Preferred Alternative highlighted the following:

1. Need to remain in place for the extended period of the interim Guidelines

2. Desirability of the alternative based on facilitated consensus recommendation from Basin States

3. Likely durability of the mechanisms adopted in the Preferred Alternative in light of the extraordinary efforts that the Basin States and water users have undertaken to develop implementing agreements that will facilitate the water management tools (shortage sharing, forbearance, and conservation efforts) identified in the Preferred Alternative

4. Range of elements in the alternative that will enhance the Secretary’s ability to manage the Colorado River reservoirs in a manner that recognizes the inherent tradeoffs between water delivery and water storage.

Importantly for the long-term stable management of the Colorado River, adoption of this decision activates a legal agreement among the Basin States that contains a critically important provision: The Basin States have agreed to mandatory consultation provisions to address future controversies on the Colorado River through consultation and negotiation, as a requirement, before resorting to litigation. With respect to the various interests, positions, and views of each of the seven Basin States, this provision adds an important new element to the modern evolution of the legal framework for the prudent management of the Colorado River.

In June 2007, the USBR announced that a preferred alternative for Colorado River Interim Guidelines for Lower Basin Shortages and Coordinated Operations of Lake Powell and Lake Mead (Preferred Alternative) had been determined.53 The Preferred Alternative, based on the Basin States consensus alternative and an alternative submitted by the environmental interests called “Conservation Before Shortage,” was comprised of four key operational elements. These four key elements of the Preferred Alternative which would guide operations of Lake Powell and Lake Mead through 2026 are:
52 Source: https://www.usbr.gov/newsroom/newsroomold/newsrelease/detail.cfm?RecordID=17341 53 Source: USBR website: http://www.usbr.gov/newsroom/newsrelease/detail.cfm?RecordID=17341.

Description of the preferred alternative is available on Reclamation's Lower Colorado Region web site:
http://www.usbr.gov/lc/region/programs/strategies/documents.html

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1. Shortage strategy for Lake Mead and Lower Division states: The Preferred Alternative proposed discrete levels of shortage volumes associated with Lake Mead elevations to conserve reservoir storage and provide water users and managers in the Lower Basin with greater certainty to know when, and by how much, water deliveries will be reduced during low reservoir conditions.

2. Coordinated operations of Lake Powell and Lake Mead: The Preferred Alternative proposed a fully coordinated operation of the reservoirs to minimize shortages in the Lower Basin and to avoid risk of curtailments of water use in the Upper Basin.

3. Mechanism for storage and delivery of conserved water in Lake Mead: The Preferred Alternative proposed the Intentionally Created Surplus (ICS) mechanism to provide for the creation, accounting, and delivery of conserved system and non-system water thereby promoting water conservation in the Lower Basin. Credits for Colorado River or non-Colorado River water that has been conserved by users in the Lower Basin creating an ICS would be made available for release from Lake Mead at a later time. The total amount of credits would be 2.1 MAF, but this amount could be increased up to 4.2 MAF in future years.

4. Modifying and extending elements of the Interim Surplus Guidelines, which determine conditions under which surplus water is made available for use within the Lower Division states. These modifications eliminate the most liberal surplus conditions thereby leaving more water in storage to reduce the severity of future shortages.

The time span to 2026 provides an opportunity to gain operating experience for the management of Lake Powell and Lake Mead and to improve the basis for making additional future operational decisions, whether during the interim period or thereafter.

Figure 6-254 shows how the coordinated operation element allows for the adjustment of Lake Powell releases to respond to low reservoir storage conditions in either Lake Powell or Lake Mead. The ICS water conservation mechanism encourages efficient use and management of Colorado River water and enhances conservation opportunities in the Lower Basin and the retention of water in Lake Mead.

Importantly for long-term stable management of the Colorado River, adoption of the 2007 Interim Guidelines activates a critical provision in the legal agreement among the basin states: the basin states have agreed to mandatory provisions to address future controversies on the Colorado River through consultation and negotiation before resorting to litigation. With respect to the various interests, positions, and views of each of the seven basin states, this provision adds an important element to the evolution of the legal framework for the prudent management of the Colorado River.

Furthermore, the coordinated operation element allows for adjustment of Lake Powell releases to respond to low reservoir storage conditions in either Lake Powell or Lake Mead, while, keeping the 2007 Interim Guidelines in place through 2026 provides an opportunity to gain operating experience for the management of Lake Powell and Lake Mead and to improve the basis for making additional future operational decisions, whether during the interim period or thereafter.
54 Source: Colorado River Basin | Bureau of Reclamation (usbr.gov)

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The Intentionally Created Surplus (ICS) water conservation mechanism encourages efficient use and management of Colorado River water and enhances conservation opportunities in the Lower Basin and the retention of water in Lake Mead.

Figure 6-2: Prescribed Operations of Lake Powell and Lake Mead in the Interim Guidelines

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In 2016, Lake Mead’s water level fell just below 1075 feet, which is the level that signals a shortage necessitating rationing. For most of the past five years, Lake Mead has remained near 1075 feet, which is lower than at any time since 1937, two years after the lake began filling, and is 150 feet below the highest level of 1,225 feet reached in 1983. Historic Lake Mead elevation levels are shown in Figure 6-3.55 Figure 6-3: Historic Lake Mead Elevation Levels
1935 to 2026 in the Interim Guidelines

6.2.3.4 Annual 417 Process
Pursuant to the Code of Federal Regulations (CFR) Title 43 Part 417 (43 CFR part 417), prior to the beginning of each calendar year, USBR consults, as appropriate, with holders of Boulder Canyon Project Act Section 5 contracts (Contractors) for the delivery of water. IID is one such Contractor. Under these consultations, USBR makes recommendations related to water conservation measures and operating practices in the diversion, delivery, distribution, and use of Colorado River water as stated by USBR in the following the following excerpt:
“The Regional Director or his (sic) representative will, prior to the beginning of each calendar year, arrange for and conduct such consultations with each Contractor as the Regional Director may deem appropriate as to the making by the Regional Director of annual recommendations relating to water conservation measures and operating practices in the diversion, delivery, distribution and use of Colorado River water, and to the making by the Regional Director of annual determinations of each Contractor’s estimated water requirements for the ensuing calendar year to the end that deliveries of Colorado River water to each Contractor will not exceed those reasonably required for beneficial use 55 Source: https://arachnoid.com/NaturalResources/

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under the respective Boulder Canyon Project Act contract or other authorization for use of Colorado River water.”

6.3 Groundwater
The City does not treat or use groundwater. Similarly, IID does not use groundwater except for a small volume from Lower Colorado Water Supply Project (LCWSP). However, this volume is considered negligible to the amount of surface water received from the Colorado River.

All IID water service areas are underlain by the Imperial Valley groundwater basin. Imperial Valley groundwater basin consists of younger and older alluvium with a groundwater storage capacity of 14 MAF and encompasses the West Mesa, Imperial Valley, and East Mesa subbasins. However, the basin has no usable capacity for IID as it is highly saline water. Additionally, although a large amount of water is stored in the groundwater basin, few wells have been drilled for production purposes because the yield is low and of poor quality. The groundwater is also generally unusable for irrigation in the Imperial Valley as the salinity, or total dissolved solids count, is too high. In the central part of the Imperial Valley, the groundwater has a higher salinity than the Colorado River water, which has an approximate salinity of 750mg/L. Most wells had total dissolved solids concentrations of between 1,000 and 3,000 mg/L. The pH of these waters is usually slightly basic, with an occasional value less than seven.

As such, for purposes of the City’s UWMP, groundwater is not considered a water supply source.

Historically there has been little need to investigate and develop the groundwater in the Imperial Valley due to the availability and relatively higher quality of imported Colorado River water.

As the City of El Centro did not pump groundwater in the past five years, DWR Submittal Table 6-1 has been omitted from this section but is included in Appendix B with the 2025 Submittal Tables.

6.4 Surface Water
The City does not use, or plan to use, self-supplied surface water as part of its water supply. The City purchases surface water from IID, which is not self-supplied.

6.5 Stormwater
The City captures runoff in retention/detention basins, which discharge to IID drains. The City is currently not using stormwater to meet local water supply demands. At this time, there are no plans to utilize stormwater, but that could change in the future.

6.6 Wastewater and Recycled Water
The City owns and operates the El Centro Wastewater Treatment Plant but does not produce or use recycled water.

Wastewater Collection, Treatment, and Disposal
El Centro collects sanitary wastewater flows within the City’s water service area and conveys the flows to the municipal wastewater treatment plant located on La Brucherie Road in the northwest part of the City.

The City operates and maintains the wastewater collection system and the treatment plant. Metered

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wastewater flows averaged approximately 3.57 MGD (3,994 AFY) for 2025 as shown in Submittal Table 6-

2. This represents an approximate increase of 13% compared with 2020 wastewater volumes.

Table 6-2: Wastewater Collected Within Service Area in 2025 Table 6-2 Retail: Wastewater Collected Within Service Area in 2025 Wastewater Collection Recipient of Collected Wastewater Wastewater
Collection
Agency
Wastewater
Volume Metered
or Estimated?
Volume of
Wastewater Collected
in 2025 (AFY)
Wastewater
Treatment
Agency
Treatment
Plant
Name
Is WWTP
Located Within
UWMP Area?
City of El Centro Metered 3,994 City of El Centro El Centro Yes Total 3,994
The wastewater treatment plant, which has a plant capacity of 8.0 MGD (8,960 AFY), provides primary and secondary treatment with ultraviolet (UV) disinfection. The plant does not have tertiary treatment facilities and does not produce recycled water. All treated effluent is discharged to the Central Main Drain. Due to the poor percolation of local soils, high water table, old infrastructure, and depth of infrastructure, groundwater infiltration has become a problem. A Capital Improvement Plan has been completed but has not been implemented. The upgrades would be dependent upon development impact fees and reimbursement agreements.

Photo 6-1: El Centro Wastewater Treatment Plant

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Wastewater treatment and discharge characteristics associated with the City are shown in Submittal Table 6-3.

Table 6-3: Wastewater Treatment and Discharge Within Service Area in 2025 Table 6-3 Retail: Wastewater Treatment and Discharge Within Service Area in 2025 WW
Treatment
Plant
Name
Discharge
Location
Name or
Identifier
Discharge
Location
Description
Method
of
Disposal
Does This
Plant Treat
Wastewater
Generated
Outside the
Service
Area?
Treatment
Level
2025 Volumes
WW
Treated
Discharged
Treated
WW
Recycled
Within
Service
Area
Recycled
Outside
of
Service
Area
Instream
Flow Permit
Requirement
El Centro Central
Main
Drain
Drain Flows
8 Miles to
Alamo
River and
then 39
Miles to
Salton Sea
River or
Creek
Outfall
No Secondary,
Disinfected,
Title 22
3,994 3,994 0 0 No
Total 3,994 3,994 0 0
Recycled Water
The City of El Centro does not currently use recycled water nor does the city have future plans for recycled water. No community in the Imperial Region produces recycled water as studies have found the capital costs to construct recycled water facilities to be cost-prohibitive relative to the purchase of IID imported water. Also, there has been a lack of political acceptance for rate increases as ratepayers have a limited ability or willingness to pay. Most communities identified the need for State, federal, or private sector funding to upgrade wastewater treatment plants. Wastewater facilities within the Imperial Region ultimately discharge to the Salton Sea (via drains and/or the Alamo River or New River). The flows help sustain habitat along IID drains and the New and Alamo rivers. The Salton Sea depends on agricultural and IID system discharges, direct rainfall, and municipal wastewater inflows to offset the effect of evaporation on salinity levels.

While recycled water may not be cost-effective for individual communities since they can obtain less expensive water from IID, it may be a viable method to increase regional water supplies or may become more cost-effective as the cost of water for new users is factored into the planning process.

Regional recycled water opportunities were evaluated in the 2012 Imperial Integrated Regional Water Management Plan. Recycled water could be used to supplement or replace Colorado River water used to irrigate local golf courses, recreational areas, green spaces, or nearby agricultural land. Recycled water could be used to create or maintain habit features or for algae production. This would help to free Colorado River water for future industrial growth or other beneficial uses.

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However, there are concerns associated with recycled water development in the Imperial Region. Salinity is a particular concern in the region. Municipal water supplies of raw Colorado River water typically have salinity levels above 760 ppm, and municipal use typically adds 300 ppm. TDS levels of 1,000 ppm adversely affect most crops or require changes in irrigation practices (e.g., increased leaching). Thus, recycling for irrigation may require desalting, blending with other supplies, or changes in agricultural practices.

The Imperial County General Plan Water Element identifies the following major environmental issues expected to be of concern with local tertiary treatment systems:
• Reduction of flows in IID drains
• Reduction of flows to Salton Sea
• Increase in drain water salinity
• Impact on fish and wildlife, recreation, and aesthetic values Any diversion of flows may have environmental impacts on the drains, rivers and/or the Salton Sea, and related mitigation costs must be factored into reuse strategies. Directing treated discharges away from the Salton Sea may not be feasible until the Salton Sea salinity level impedes fish production or has been restored and is not dependent on the inflows (Salton Sea Authority, 2006). Also, additional treatment to facilitate recycling could result in the concentration of contaminants in the remaining flows discharged to the drains or rivers.

Imperial County and IID will work to advance recycled water use in the region by:
• Integrating the recycling municipal wastewater with a regional mitigation banking strategy. • Supporting wastewater facility plant upgrades that propose reclaiming municipal water for use in renewable energy projects planned or recently constructed in the communities of Seeley, Brawley, and Imperial and include as part of the near-term strategy. • Requiring mitigation to meet state and federal environmental requirements related to reduction in flows to IID drains and to the New and Alamo rivers and other waterways through development of a regional mitigation bank; seek to provide regional benefits, create partnerships, and meet multiple Imperial IRWMP goals by using reclaimed wastewater for this purpose where cost-effective and timely.
• Considering regional municipal water reclamation projects to increase cost-effectiveness of project development and operation, provide benefits to multiple parties, and improve opportunities to reuse the water.
• Providing policy and financial incentives for public/private partnerships to construct municipal recycling facilities and for crediting the produced water to sponsoring entities to allow for exchange of produced water for delivery of Colorado River water. • Continuing to evaluate the cost-effectiveness and political viability of regional municipal wastewater treatment facilities that include reclaiming wastewater as part of the mid- and long-term water management strategy.

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• Coordinating and adopting appropriate policies to encourage use of recycled municipal water inlieu of Colorado River water to mirror California Energy Commission (CEC) and SWRCB policy.

Note that DWR Tables 6-4, 6-5, and 6-6 show historical, existing, and projected recycled water use. As the City has not used recycled water in the past and does not project any such future use, these tables are omitted from this section but included in Appendix B, Submittal Tables.

6.7 Desalinated Water Opportunities
There are no plans for the City of El Centro to use and treat the brackish groundwater as a long-term supply in the Imperial Valley. There are no feasible opportunities for the City to independently develop desalinated water sources within the planning horizon of this 2025 UWMP, because of the supply availability and cost effectiveness of treating surface water from the Colorado River. If it becomes financially feasible in the future, there may be consideration for desalination of brackish groundwater and drain water on a regional basis.

6.8 Exchanges or Transfers
The City currently does not participate with other water agencies on water exchanges or transfers into or out of the City’s water service area and none are planned at this time. All agencies within the Imperial Valley utilize the same raw source water from IID.

6.9 Future Water Projects
DWR Submittal Table 6-7 is to show future water supply projects or programs that provide a quantifiable increase to an agency’s water supply. There are no future City water supply projects or programs that provide a quantifiable increase to City water supply at this time as indicated in Table 6-7 included in Appendix B, DWR Submittal Tables.

Although the City does not have any future water supply projects planned to increase the amount of the water supply available, the City of El Centro is a participant in the Imperial Water Forum. The Imperial IRWMP being developed by the Water Forum includes evaluation of potential future projects and programs that may be implemented to increase the amount of the water supply available in all types of years. The Imperial IRWMP will contain an implementation plan and listing of projects to be implemented to increase the water supply portfolio. As a participant in the IRWMP, the City is working within the larger Region through the collaborative IRWMP effort to increase the amount of supply within the Region.

6.10 Summary of Existing and Planned Sources of Water
Surface water imported from the Colorado River by IID is the primary water supply for the Imperial Region and the sole water supply for the City of El Centro. Colorado River water is used to meet all current agricultural and non-agricultural water demands in the IID water service area.

Rainfall is less than three inches per year and does not contribute to IID water delivery, although at times it does increase or reduce agricultural water demand. Groundwater in the Imperial Valley is of poor quality and is generally unsuitable for domestic or irrigation purposes, though some is pumped for industrial (geothermal) use.

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The City collects municipal wastewater and delivers it to their wastewater treatment plant via a network of 125 miles of sewer pipelines. The City’s wastewater treatment plant has a capacity of 8.0 MGD (8,960 AFY) and provides primary and secondary treatment with ultraviolet (UV) disinfection. The plant does not have tertiary treatment facilities and does not produce recycled water. All treated effluent is discharged to the Central Main Drain. At this time, no community in the Imperial Region produces recycled water as studies have found the capital costs to construct recycled water facilities to be cost-prohibitive relative to the purchase of IID imported water.

The City’s actual water supplies for 2025 are shown in Submittal Table 6-8 Table 6-8: Water Supplies – Actual (AF)
Table 6-8 Retail: Water Supplies — Actual
Water Supply Additional Detail on Water
Supply
2025
Actual Volume Water Quality
Purchased or Imported Water Imperial Irrigation District – Raw Colorado River Water 7,970 Other NonPotable Water
Total 7,970
The City’s projected supplies for 2030 through 2050 are shown in Submittal Table 6-9. Given that 100 percent of the City’s demand is met through Colorado River water purchased from IID, and given the extreme reliability of that water source, IID will be able to meet El Centro’s demands in all projected years through 2050. Therefore, the supply entries are equal to projected demand (Submittal Table 4-2) in each year resulting in a zero difference in all years through 2050.

Table 6-9: Water Supplies, Projected (AF)
Table 6-9: Water Supplies — Projected
Water Supply
Additional
Detail on
Water
Supply
Projected Water Supply
Report to the Extent Practicable
2030 2035 2040 2045 2050
Reasonably
Available
Volume
Reasonably
Available
Volume
Reasonably
Available
Volume
Reasonably
Available
Volume
Reasonably
Available
Volume
Purchased or
Imported
Water
Imperial
Irrigation
District
7,516 7,662 7,801 8,082 8,366
Total 7,516 7,662 7,801 8,082 8,366

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6.11 Energy Intensity
CWC Section 10631.256 requires water suppliers to provide information that can be used to calculate the energy intensity of their water service. Energy intensity is a ratio of energy consumed per unit (by volume) of water supplied. Required information is limited to that which is readily obtainable by the supplier for their operations, which includes acquiring, treating, and distributing water supplies.

The City of El Centro purchases all of its water supply from IID, which delivers raw Colorado River water to the City’s Water Treatment Plant at 1101 Danenberg Drive in El Centro via IID’s All-American Canal and Central Main Canal. Following treatment and storage in one of three potable water reservoirs at the plant site, the treated water is pumped directly into the City’s water distribution system via four 200 hp pumps.

The City also has a two 200 hp pumps located at the La Brucherie Reservoir site approximately two miles northwest of the WTP. The La Brucherie facility also pumps water directly into the City’s distribution system from a 5.0 MG steel tank located at that site.

Energy usage information for IID’s conveyance of raw Colorado River water to the City’s WTP is not readily available. Therefore, the energy usage intensity reported in Table 6-10 A was calculated using the total utility approach as described in Appendix O of the UWMP Guidebook57. The “Volume of Water Entering Process” is equal to the total volume of water entering the City’s distribution system from the WTP. The “Energy Consumed” is the total amount of kWh used at the City’s two previously referenced pumping stations at the WTP and the La Brucherie Reservoir site, as well as some additional process pumping at the WTP. The “Energy Intensity” is equal to the “Energy Consumed” in kWh divided by the “Water Entering the Process” with the result shown in kWh/AF.

Table 6-10 A: Energy Intensity – Total Utility Approach (for 2025) Table 6-10 A: Energy Intensity - Total Utility Approach (for 2025) Water Management Process Total Utility
Volume of Water Entering Process (AF and MG) 7,970 AF / 2,597 MG Energy Consumed
• 1101 Danenberg WTP Process Pumping (kWh) 1,992
• 8
th Street TP Pump Station (kWh) 6,012
• La Brucherie Reservoir Pump Station (kWh) 1,043
Total Energy Consumed (kWh) 9,047
Energy Intensity (kWh/AF) 1.14
Energy Intensity (kWh/MG) 3.48
56 Source: https://leginfo.legislature.ca.gov/faces/codes_displayText.xhtml?lawCode=WAT&division=6.&title=&part=2.6.&chapter=3.&article=2. 57 Source: https://water.ca.gov/-/media/DWR-Website/Web-Pages/Programs/Water-Use-And-Efficiency/Urban-Water-UseEfficiency/Urban-Water-Management-Plans/Final-2020-UWMP-Guidebook/Appendix-O---UWMP-2020.pdf

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6.12 Climate Change Impacts to Supply
Climate change impacts are discussed in Section 4.6 including potential impacts to water supply sources and water use trends.

Climate change is not viewed as an impacting factor in water source reliability for the City of El Centro as the City’s water demands are significantly lower than their available supply. The IID, who supplies the City with raw water, places the highest priority on drinking water supply, the quantity of which makes up a very small percentage of the IID’s total water rights. As such, for the foreseeable future, water supply impacts due to climate change are not at risk.

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7 WATER SUPPLY RELIABILITY ASSESSMENT

7.1 Overview
This chapter describes the City of El Centro’s water system reliability through a 25-year planning horizon.

This water service reliability includes the ability to maintain adequate service during various conditions including normal, single dry year, and five consecutive dry years. Included in this chapter is the Drought Risk Assessment required for this 2025 UWMP.

Reliability of Colorado River Surface Water Supplies
As discussed in Chapter 6 of this 2025 UWMP, the City of El Centro receives 100 percent of its water supply from the Imperial Irrigation District (IID), whose Colorado River supplies are supported by a framework of federal laws, interstate compacts, court decrees, and water rights agreements collectively known as the Law of the River. Key elements include the Colorado River Compact of 1922, the Seven-Party Agreement, Arizona v. California, and the Quantification Settlement Agreement (QSA).

IID possesses some of the most senior and secure Colorado River water rights in the Lower Basin. Under the QSA and related transfer agreements, IID holds Priority 3(a) rights to up to 3.1 million acre-feet (MAF) of Colorado River water annually and maintains present perfected rights of approximately 2.6 MAF per year. These present perfected rights are afforded among the highest priorities under the Law of the River and are generally protected before reductions are imposed on more junior water users.

Historically, Colorado River operations have been managed through coordinated reservoir operations at Lake Powell and Lake Mead, with shortages determined by reservoir storage conditions. Since 2000, the Colorado River Basin has experienced prolonged drought, declining reservoir storage, and reduced runoff associated with aridification and climate change. These conditions have resulted in shortage declarations and delivery reductions for some Colorado River water users.

The Colorado River operating guidelines that governed reservoir operations through 2026 are being replaced by a new federal operational framework for 2027 through 2036. The new framework is intended to address long-term hydrologic uncertainty, protect critical reservoir elevations, and maintain water delivery capabilities under a range of future conditions. While future operating requirements may result in additional reductions for some Colorado River users, IID's senior water rights position continues to provide a high degree of supply reliability relative to many other basin water users.

Accordingly, IID is expected to maintain reliable deliveries to its municipal customers, including the City of El Centro. Nevertheless, future Colorado River operations remain subject to changing hydrologic conditions, regulatory requirements, and federal reservoir management policies, which will continue to be monitored as part of future water supply planning efforts.

Equitable Distribution Plan Water Apportionment
IID is subject to the 3.1 million acre-foot annual consumptive use cap under the Quantification Settlement Agreement and the rules of the federal Inadvertent Overrun and Payback Policy, which set forth the limitations under which IID may exceed its annual consumptive use cap, including payback requirements, and the circumstances under which IID cannot exceed its annual consumptive use cap.

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In some years IID’s total annual consumptive use may exceed its Colorado River entitlement, resulting in inadvertent overruns (annual use that exceeds the capped amount of supply), which IID must pay back in subsequent years from extraordinary conservation practices.58 Forecasted increases in Municipal and industrial (M&I) demand are expected to exacerbate this condition. Any time annual consumptive use exceeds the threshold, an inadvertent overrun is charged to IID.

IID manages its Colorado River water supplies pursuant to the Equitable Distribution Plan (EDP), which was most recently revised and adopted by the IID Board of Directors on July 26, 2023.59 The EDP provides a framework for equitably allocating IID's available water supply among agricultural, municipal, commercial, industrial, and other authorized water users when annual water demands approach or exceed the District's available Colorado River supply. The EDP is intended to ensure compliance with IID's annual Colorado River water entitlement and consumptive use limitations while providing a transparent process for allocating available supplies among water-user categories.

The 2023 EDP establishes annual apportionments for District water users and requires IID to provide notice of apportionments prior to the applicable water year. Available water supplies are distributed among categories of water users through a structured apportionment process that considers water supply conditions, operational requirements, conservation commitments, and reasonable and beneficial use requirements. The EDP is implemented on a calendar-year basis and is designed to equitably distribute available water supplies throughout the District while maintaining flexibility to respond to changing hydrologic and operational conditions.

A key component of the 2023 EDP is the Clearinghouse, which facilitates transfers of apportioned water among eligible water users in accordance with EDP requirements. The July 2023 revisions expanded wateruser flexibility by allowing additional transfer opportunities, including direct transfers within water-user categories. These provisions help improve the efficient use of available supplies and provide water users with greater operational flexibility while maintaining the overall objectives of equitable distribution and water conservation.

The EDP operates in conjunction with IID's water conservation and Colorado River management programs and reflects the ongoing challenges associated with drought conditions and water supply reliability within the Colorado River Basin. Through implementation of the EDP, IID seeks to manage its available water supply in a manner that supports agricultural production, municipal and industrial water needs, environmental obligations, and long-term water supply sustainability.

Legal
As presented in Chapter 6 and summarized above in Chapter 7 of this UWMP, numerous federal laws, interstate compacts, court decrees, contracts, and agreements collectively known as the Law of the River establish and protect IID's Colorado River water rights and provide the legal foundation for IID's Colorado River water supply and support a high degree of long-term supply reliability.

Beginning in 2027, Colorado River reservoir operations are governed by a new federal operating framework developed in response to prolonged drought, declining reservoir storage, and hydrologic uncertainty across 58 Per terms of the USBR Inadvertent Overrun and Payback Policy - https://www.usbr.gov/lc/region/g4000/4200Rpts/DecreeRpt/2019/32.pdf 59 EDP, IID, Adopted 2007, Last Revised 2023 – iid.com/home/showpublisheddocument/20254/638313266942930000

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the basin. While future operational requirements and shortage-sharing provisions may affect some Colorado River users, IID's senior water rights position continues to provide substantial protection relative to many other basin contractors. Nevertheless, Colorado River operations will continue to be influenced by evolving hydrologic conditions, regulatory requirements, and federal water management policies Environmental
Construction of most of the Colorado River’s water supply infrastructure predated major federal environmental protection statutes, such as the National Environmental Policy Act (NEPA; 42 U.S.C. §§4321 et seq.) and the Endangered Species Act (ESA; 87 Stat. 884, 16 U.S.C. §§1531-1544). Thus, many of the environmental impacts associated with the development of basin resources were not originally taken into account. Over time, multiple efforts have been initiated to mitigate these effects. Some of the highest-profile efforts have been associated with water quality (in particular, salinity control) and the effects of facility operations on endangered species.60
Several fish species and other wildlife species either directly or indirectly have the potential to affect Colorado River options, thus changing power operations and the amount of water deliveries to the lower basin. A number of species that are on either endangered or threatened lists under the Endangered Species Act are present in the Lower Colorado River, including among others, the bonytail chub, razorback sucker, southwestern willow flycatcher and Yuma clapper rail. To address this issue, a broad-based State/Federal/tribal/private regional partnership has been formed, which includes water, hydroelectric power and wildlife management agencies in Arizona, California and Nevada. The objective is to accommodate current water diversions and power production and optimize opportunities for future water and power development while working toward the conservation of habitat and toward recovery of the endangered species. These efforts also have the objective of reducing the likelihood of additional “threatened/endangered” species listings.

As basin species became listed in accordance with the ESA, which was enacted in 1973, 50 federal agencies and nonfederal stakeholders consulted with the U.S. Fish and Wildlife Service (FWS) to address the conservation of the listed species. As a result of these consultations, several major programs have been developed to protect and restore endangered fish species in the Colorado River and its tributaries.

Summaries of these key programs are presented below.

7.1.4.1 Upper Colorado Endangered Fish Recovery Program The Upper Colorado River Endangered Fish Recovery Program was established in 1988 to recover four native fish species listed under the federal Endangered Species Act (ESA): the Colorado pikeminnow, humpback chub, razorback sucker, and bonytail. The program is a cooperative partnership among federal agencies, the states of Colorado, Utah, and Wyoming, water users, power customers, and environmental organizations. Recovery actions include restoring habitat, providing instream flows, constructing fish passage facilities, managing nonnative fish species, and supporting propagation and stocking programs.

The program is designed to promote species recovery while allowing continued water development and 60 Source: Information on Endangered species was extracted from a U.S. Congressional Research Service Report entitled “Management of the Colorado River: Allocations, Drought and the Federal Role, Updated December 15, 2020 – https://crsreports.congress.gov/product/pdf/R/R45546

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management activities consistent with federal and state water laws and interstate compacts. Congress authorized federal funding for the program through Public Law 106-392.

7.1.4.2 San Juan River Basin Recovery Implementation Program The San Juan River Basin Recovery Implementation Program was established in 1992 to recover the endangered Colorado pikeminnow and razorback sucker in the San Juan River Basin while accommodating existing and future water development. The program is a cooperative effort involving federal agencies, the states of Colorado and New Mexico, the Navajo Nation, Jicarilla Apache Nation, Southern Ute Indian Tribe, Ute Mountain Ute Tribe, water users, and conservation organizations. Recovery measures include flow management, habitat restoration, propagation and stocking of native fish, control of nonnative species, and long-term monitoring. The program also provides a framework for ESA compliance for water development and management projects within the basin.

7.1.4.3 Glen Canyon Dam Adaptive Management Program
The Glen Canyon Dam Adaptive Management Program was established in 1997 to implement the environmental protection and monitoring requirements of the Grand Canyon Protection Act of 1992. The program evaluates the effects of Glen Canyon Dam operations on natural, cultural, and recreational resources in Glen Canyon National Recreation Area and Grand Canyon National Park. Through scientific monitoring, research, and experimental dam releases, the program seeks to improve understanding of river ecosystem conditions and support informed management decisions. Key areas of focus include habitat maintenance, sediment and sandbar restoration, native fish conservation, management of nonnative species, and protection of cultural resources downstream of Glen Canyon Dam.

7.1.4.4 Lower Colorado Multi-Species Conservation Program (MSCP) The Lower Colorado River Multi-Species Conservation Program (LCR MSCP) is a 50-year cooperative conservation program that began in 2005 to balance the use of Colorado River water resources with the conservation of native species and habitats along the Lower Colorado River. The program covers 27 species, including several federally listed threatened and endangered species. Program activities include creation and restoration of riparian, marsh, and backwater habitats; monitoring and research; and augmentation of native fish populations. The LCR MSCP provides ESA compliance coverage for participating federal and nonfederal water and power activities while supporting continued operation of Colorado River water delivery and hydropower facilities. The program extends from Lake Mead to the United States-Mexico border and is funded jointly by the federal government and Lower Basin water and power users.

7.1.4.5 Colorado River Delta Environmental Restoration Program The Colorado River Delta Environmental Restoration Program consists of binational restoration activities implemented under Minutes 319 and 323 to the 1944 Water Treaty between the United States and Mexico. The program is intended to restore and enhance riparian and wetland habitats within the Colorado River Delta through environmental flows, habitat restoration, scientific monitoring, and cooperative water conservation efforts. Participating entities include the U.S. Bureau of Reclamation, the

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International Boundary and Water Commission, Mexican federal agencies, water agencies, and nongovernmental organizations. The program contributes to the conservation of native fish and wildlife species and supports broader ecosystem restoration objectives in the lower Colorado River region.

Water Quality
Salinity is the primary water quality concern in the Colorado River Basin. Salinity concentrations increase downstream due to natural geologic conditions, evaporation, and agricultural return flows.

To address salinity impacts and meet U.S. obligations under Minute 242 of the 1944 U.S.-Mexico Water Treaty, federal and interstate salinity control programs have been implemented throughout the basin, including projects authorized under the Colorado River Basin Salinity Control Act of 1974.

In 1974, the seven basin states also established water quality standards for salinity through the Colorado River Basin Salinity Control Forum. Salinity management remains an active basin-wide program and the Colorado River Basin Salinity Control Forum continues to review and update salinity standards and implementation programs.

Another basin water quality problem is Quagga mussels, which are an invasive species first detected in 2007 in Lake Mead. This species of mussels forms massive colonies in short periods of time, disrupting ecosystems and blocking water intakes. They can also cause significant disruption and damage to water distribution systems. Quagga mussels remain established throughout much of the Lower Colorado River system and continue to require monitoring and management by water agencies. Controlling the spread and impacts of this invasive species within the CRA requires extensive maintenance and results in reduced operational flexibility.

Water agencies throughout California are increasingly focused on emerging contaminants, including PFAS, microplastics, pharmaceuticals, and other constituents of emerging concern. Regulatory requirements and monitoring programs for these constituents continue to evolve. IID conducts ongoing source-water monitoring in coordination with the State Water Resources Control Board Division of Drinking Water and provides water quality data to participating agencies. While salinity remains the principal Colorado River water quality concern, emerging contaminants may influence future monitoring and treatment requirements for potable water systems.

7.1.5.1 Imported Water
IID annually coordinates with a state certified laboratory for the collection and analysis of Title 22 (of the California Code of Regulations) source water samples as a service to local public water treatment systems in facilitating the annual production of Consumer Confidence Reports (CCR).61 The data and a share of the incurred costs are forwarded to all of participants in the Title 22 Joint Watershed Monitoring Program.

The All-American Canal (AAC) and three main supply canals (East Highline, Central Main, and Westside Main) are sampled each year for numerous constituents as required by law and in coordination with the State Water Resources Control Board’s Division of Drinking Water. 61 The City’s most recent published CCR is available on their website:
https://www.cityofelcentro.org/ArchiveCenter/ViewFile/Item/101

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In 2018, IID implemented an enhanced source-water monitoring program under the direction of the State Water Resources Control Board Division of Drinking Water. The program expanded monitoring to include 21 additional sampling locations to further characterize Colorado River source water quality and support Consumer Confidence Report requirements.62
Climate Change
Climate change is expected to affect water resources throughout the western United States by increasing temperatures, altering precipitation patterns, reducing snowpack, increasing evapotranspiration, and increasing the frequency and severity of droughts and extreme weather events. These changes create uncertainty for long-term water supply planning and may affect both water availability and water demand.

As a result, water suppliers increasingly incorporate climate resilience and adaptive management strategies into water resource planning.

The City of El Centro receives its entire potable water supply from the Colorado River through the Imperial Irrigation District (IID). The Colorado River Basin has experienced persistent drought and aridification since 2000, resulting in historically low storage levels in Lakes Mead and Powell and prompting ongoing interstate and federal efforts to develop new operating guidelines for the river after 2026. Recent studies and planning efforts indicate that climate change may reduce long-term Colorado River runoff and increase pressure on basin water supplies.

Despite these basin-wide challenges, IID's water supply reliability remains relatively strong due to its senior Colorado River water rights and high priority under the Law of the River. Under current interstate agreements and water allocation priorities, shortages are generally absorbed first by users with more junior water rights and by Lower Basin shortage-sharing mechanisms. Nevertheless, climate change may affect future Colorado River operations, reservoir management, conservation requirements, and water management policies throughout the basin.

Consequently, while climate change is not currently expected to significantly affect the City's access to Colorado River supplies delivered through IID, continued drought, declining reservoir storage, evolving operational guidelines, and changing hydrologic conditions introduce uncertainty that warrants ongoing monitoring and adaptive water management planning.
62 Source: Information in this Section has been extracted from the IID website – https://www.iid.com/water/water-supply/water-quality

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7.2 Water Service Reliability
This section builds on Chapter 6 and serves to reflect the City’s ability to meet the water needs of its customers based on its water sources during varying hydrologic conditions. Within the City’s service area, demand is significantly lower than the City’s day-to-day storage volumes and production capacity. Outside of the City’s production, is the amount provided by IID from whom the City receives all its raw water.

Although it has been determined that IID’s water supply is significant compared to the needs of the City, this reliability assessment focuses on IID’s supply to the City and to identify whether there are any potential disruptions to the City in the near future.

Through coordination with IID staff in preparing this 2025 UWMP and per IID’s most recent base Water Supply Assessment Document, the water availability from IID to the City during a single-dry and multipledry year scenarios is no different from water availability during in a normal year. This is partially due to the small effect rainfall has on water availability in IID’s arid environment along with IID’s entitlements to Colorado River water supply. Local rainfall does have some impact on how much water is consumed (i.e. if rain falls on agricultural lands, those lands will not demand as much irrigation) but does not impact the definition of a normal year, a single-dry year or a multiple-dry year scenario from a supply perspective.

The main factors that can cause water supply shortages for the City are water quality or pollution, earthquakes, and long-term energy outages at the treatment and pumping facilities. Since IID is the only supplier of water to the City, there is no alternative source water.

The City receives water from the All-American and Central Main Canals. If either the All-American Canal or Central Main Canal were shut down, water could not be delivered to the treatment plant. Potential shutdown causes include scheduled maintenance or because of an emergency, such as an earthquake. In October 1979, an earthquake caused levee and slope failures along the All-American Canal east of El Centro, severely limiting water flow. This is the only time during the last 45 years that the All-American Canal was shut down.

To perform maintenance on the Central Main Canal, the water level is lowered but service is not completely interrupted. According to plant operators, this is done every five to ten years. Similarly, maintenance on the All-American Canal is generally performed while the canal remains in operation by reducing flows, isolating canal reaches, and scheduling work during periods of lower water demand. Full canal shutdowns are rare and are carefully planned to minimize impacts on water deliveries. There are no known upcoming factors that will result in inconsistency of supply.

IID continuously monitors Colorado River conditions and communicates with its customers regarding water supply conditions and conservation measures as appropriate. In the event of significant shortages or operational changes affecting Colorado River supplies, IID and its municipal customers would implement applicable water shortage response and demand management measures consistent with their Water Shortage Contingency Plans and other adopted policies.

Average Year and Dry Year Supply and Demand Reliability Comparison Over the last decade, the Colorado River Basin has remained in a prolonged “megadrought” that began around 2000 and became especially acute in the 2010s and early 2020s. The period from roughly 2000 through 2021 has been identified as the driest multi-decade interval in more than a century of recorded data. Within this period, basin-wide runoff remained persistently below average and reservoir storage

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declined to historically low levels. By the early 2020s, these cumulative deficits resulted in the first federally declared shortage conditions on the Colorado River system and the implementation of mandatory delivery reductions in the Lower Basin.

A transition to wetter conditions did not occur until 2023 (October 2022–September 2023), when a series of strong winter storms and atmospheric rivers generated above-average precipitation and near-record mountain snowpack across much of the basin. This wet year improved runoff and temporarily boosted reservoir storage, providing short-term relief; however, it did not eliminate the long-term deficit created by more than two decades of drought. Subsequent winter seasons (2023–2024) continued to produce nearto above-average precipitation in parts of the West, further recovering and stabilizing basin storage.

According to Western Regional Climate Center (WRCC) Data, Calendar year 2008 had an annual rainfall of 2.60 inches – the closest over the past two decades to the 89-year average of 2.54 inches63. For this reason, 2008 has been selected as the “Normal” or “Average” year for this 2025 UWMP.

A single-dry year is defined as a single year of no to minimal rainfall within a period of average precipitation.

The year 2006 was selected as the “Single Dry-Year” because it had the lowest annual rainfall over the past two decades (0.42 inches) and was also well below the 89-year average. This coupled with the relatively high IID consumptive use of Colorado River water in 2006 is therefore deemed a “dry” water year.

Multiple-dry years are defined as five or more consecutive years with minimal rainfall within a period of average precipitation. A review of El Centro rainfall records dating back to 1975 identified the five-year period (2000 to 2004) during which rainfall fell below the 2.54-inch average for five consecutive years. This period was also one of the driest periods in the Colorado River Basin with inflows dropping to a fraction of the historical mean.

It is noteworthy to address that an analysis of a normal, single dry, and multiple dry water years was performed by IID to determine that adequate water is available under these various climate scenarios.

When drought conditions exist within the IID water service area, as has been the case for most of the past two decades, the water supply available to meet agricultural and non-agricultural water demands remains reliable. Nevertheless, recent drought conditions have required increased reliance on conservation, demand management, and operational measures to maintain compliance with Colorado River water use obligations while preserving long-term supply reliability. Programs such as deficit irrigation and system conservation agreements have reduced consumptive use to help offset declining basin supplies.

Comparison of Average, Single-Dry and Five Consecutive Dry Years As discussed above, 2006 was identified as the best representative for a single-dry year with the 2000- 2005 interval identified as the driest consecutive five-year sequence while 2008 was selected to represent an average year hydrology.

Under the 2023 EDP, IID apportions water annually (based on calendar year) to its water users, including the City of El Centro. Each year’s apportionment is passed on the previous three year average water demand. If cumulative municipal demands exceed the sector allocation, IID will make additional supplies 63 Source: Data obtained from Western Regional Climate Center (WRCC), Desert Research Institute, Reno, Nevada (http://www.wrcc.dri.edu/cgi-bin/cliMAIN.pl?ca2713 ); WRCC program administered by the National Oceanic and Atmospheric Administration (NOAA); data extracted from monitoring Station 042713 at El Centro 2 SSW, CA for period 3/01/1932 through 4/20/2021 (Refer to link for monthly precipitation listings/monthly totals)

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available in accordance with the EDP to meet reasonable and beneficial municipal demands. IID does not restrict the amount of water the City may purchase above that year’s apportionment. As a result, the City expects sufficient supplies from IID to meet projected demands under normal and shortage conditions. M&I users would be expected to implement conservation and demand management measures before any reduction in municipal water deliveries is considered.

Basis of water year data and percent of average supply available for an average year, dry year, and multiple dry-year conditions are shown in submittal Table 7-1. The percent of average supply is based on the City’s actual per capita water supply for each of the historical periods indicated. The historical periods selected are prior to state mandated conservation under SBx7-7 which became effective February 3, 2010. As such, the water use is representative of the baseline use under the various hydrologic conditions and not impacted by required reductions. It is important to note that the available supply shown in Table 7-1 does not represent limits on supply availability through IID but is rather the supply to meet projected demands based on projected 100 percent supply reliability from IID as discussed Section 7.2.1.

Table 7-1 Retail: Basis of Water Year Data (Reliability Assessment) Submittal Table 7-1 Retail: Basis of Water Year Data (Reliability Assessment) Year Type Base Year
Available Supplies if Year Type Repeats
Quantification of available supplies is
not compatible with this table and is
provided elsewhere in the UWMP.

Quantification of available supplies is
provided in this table as either volume
only, percent only, or both.

Base Year
Supply64 (AFY) % of Average Supply
Average Year 2008 100%
Single-Dry Year 2006 109%
Consecutive Dry Years 1st Year 2000 105%
Consecutive Dry Years 2nd Year 2001 103%
Consecutive Dry Years 3rd Year 2002 105%
Consecutive Dry Years 4th Year 2003 103%
Consecutive Dry Years 5th Year 2004 105%
64 Base year supply to the City is provided here for reference in calculating the projected percentage of average supply available during single-dry and five consecutive dry year periods. The volumes do not necessarily represent the supply available in future years.

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7.3 Supply and Demand Assessment
A comparison between the supply and demand for projected years between 2030 and 2050 is shown in Submittal Table 7.2. Given that 100 percent of the City’s demand is met through Colorado River water purchased from IID, and given the extreme reliability of that water source, IID will be able to meet El Centro’s demands in all projected years through 2050. Therefore, the Supply and Demand entries are the same in each year resulting in a zero difference in all years through 2050.

Table 7-2: Normal Year Supply and Demand Comparison (AF) Submittal Table 7-2 Retail: Normal Year Supply and Demand Comparison (AF) 2030 2035 2040 2045 2050
Supply totals (from Table 6-9) 7,516 7,662 7,801 8,082 8,366 Demand totals (from Table 4-3) 7,516 7,662 7,801 8,082 8,366 Difference 0 0 0 0 0
Comparisons between supply and demand in a single dry year and multiple dry years are shown in Submittal Tables 7-3 and 7-4 respectively. Again, due to the extreme reliability of IID’s Colorado River water source, available supplies purchased from IID will meet projected demands in all years through 2045.

Table 7-3: Single Dry Year Supply and Demand Comparison (AF) Table 7-3: Single Dry Year Supply and Demand Comparison 2030 2035 2040 2045 2050
Supply totals 8,193 8,351 8,504 8,809 9,119
Demand totals 8,193 8,351 8,504 8,809 9,119
Difference 0 0 0 0 0

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Table 7-4: Multiple Dry Years Supply and Demand Comparison (AF) Table 7-4: Multiple Dry Years Supply and Demand Comparison 2030 2035 2040 2045 2050
First year
Supply totals 7,892 8,045 8,191 8,486 8,784
Demand totals 7,892 8,045 8,191 8,486 8,784
Difference 0 0 0 0 0
Second year
Supply totals 7,742 7,892 8,035 8,324 8,617
Demand totals 7,742 7,892 8,035 8,324 8,617
Difference 0 0 0 0 0
Third year
Supply totals 7,892 8,045 8,191 8,486 8,784
Demand totals 7,892 8,045 8,191 8,486 8,784
Difference 0 0 0 0 0
Fourth year
Supply totals 7,742 7,892 8,035 8,324 8,617
Demand totals 7,742 7,892 8,035 8,324 8,617
Difference 0 0 0 0 0
Fifth year
Supply totals 7,892 8,045 8,191 8,486 8,784
Demand totals 7,892 8,045 8,191 8,486 8,784
Difference 0 0 0 0 0

7.4 Drought Risk Assessment
The CWC requires every urban water supplier to include, as part of its UWMP, a drought risk assessment (DRA) for its water service area. This water supplier can then consider this information when developing its demand management measures and water supply projects and programs. The DRA allows suppliers to consider how to manage water supplies during dry hydrologic conditions while taking variation in demand into account. This process helps a supplier evaluate its WSCP and anticipate appropriate shortage response actions prior to experiencing an actual extended drought period.

The CWC requires the DRA to be based on the driest five-year historic sequence for the agency’s water supply. By code, the analysis must also consider plausible changes in projected supplies and demands due to climate change, anticipated regulatory changes, and other applicable criteria.

The five-year drought period for the DRA is estimated in the same manner as the multiple dry year analysis in the Supply and Demand Assessment presented in Section 7.4. The drought is represented based on the five driest years shown in Table 7-1 (1998-2002). The dry year unconstrained demand is estimated as a percentage of the normal year demand for the same period. The normal year demand forecast is described in Chapter 4 and is based on SCAG and DOF demographic projections and baseline conservation. The Normal or Average year demands for the intermediate years between 2025 and 2030 were calculated by interpolation between actual 2025 data and 2030 projections.

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Table 7-5 A shows a summary of supply and demand for the DRA period from 2026 to 2030.

Table 7-5 A: DRA Supply and Demand by Source (AFY)
Table 7-5A: DRA Supply and Demand by Source (AFY)
Demand 2026 2027 2028 2029 2030
Average Year Potable 7,879 7,788 7,698 7,607 7,516
Dry-Year Potable 8,273 8,022 8,083 7,835 7,892
Recycled 0 0 0 0 0
DRA Demand 8,273 8,022 8,083 7,835 7,892
Supply 2026 2027 2028 2029 2030
Imported Water 8,273 8,022 8,083 7,835 7,892
Recycled 0 0 0 0 0
DRA Supply 8,273 8,022 8,083 7,835 7,892
IID projects sufficient supply to meet all demands over the next five years under both normal conditions and drought conditions. The City’s DRA presented in Table 7-5 demonstrates water supply reliability during a long-term drought scenario occurring over the next five years. No water shortage is projected that would trigger Water Shortage Contingency Plan Actions (discussed in Chapter 8). Although unlikely, this DRA will be modified between UWMP cycles, if necessary, should a change in forecasted supplies be projected.

Table 7-5 presents the Five-Year Drought Risk Assessments for the next five years, i.e., 2026-2030. The total water use for each year was extracted from the DRA Demand entries in Table 7-5 A and the percent of average demands for each of the five consecutive drought years (i.e., 105%, 103%, 105%, 103% and 105%, for years, 1-5, respectively) as presented in Table 7-1. In other words, in Year 1 (assumed to be 2026) of the five-year drought period, the demand would be (average demand of 7,913 AFY) x (105% of average demand in drought year 1) = 7,186 AFY, while Year 2 = (7,710 x 95%) or 7,325 AFY, etc.

As was the case in Table 7-5 A, DRA supplies equal DRA demands in all cases (i.e., Years 1-5) because of the extreme reliability of the IID supplies. Thus, there are no projected shortfalls or planned WSCP action through 2050.

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Table 7-5: Five-Year Drought Risk Assessment Tables
Submittal Table 7-5: Five-Year Drought Risk Assessment Tables to address Water Code Section 10635(b) 2026 Total
Total Water Use 8,273
Total Supplies 8,273
Surplus/Shortfall w/o WSCP Action 0
Planned WSCP Actions (use reduction and supply augmentation) WSCP - supply augmentation benefit 0
WSCP - use reduction savings benefit 0
Revised Surplus/(shortfall) 0
Resulting % Use Reduction from WSCP action 0%
2027 Total
Total Water Use 8,022
Total Supplies 8,022
Surplus/Shortfall w/o WSCP Action 0
Planned WSCP Actions (use reduction and supply augmentation) WSCP - supply augmentation benefit 0
WSCP - use reduction savings benefit 0
Revised Surplus/(shortfall) 0
Resulting % Use Reduction from WSCP action 0%
2028 Total
Total Water Use 8,083
Total Supplies 8,083
Surplus/Shortfall w/o WSCP Action 0
Planned WSCP Actions (use reduction and supply augmentation) WSCP - supply augmentation benefit 0
WSCP - use reduction savings benefit 0
Revised Surplus/(shortfall) 0
Resulting % Use Reduction from WSCP action 0%
2029 Total
Total Water Use 7,835
Total Supplies 7,835
Surplus/Shortfall w/o WSCP Action 0
Planned WSCP Actions (use reduction and supply augmentation) WSCP - supply augmentation benefit 0
WSCP - use reduction savings benefit 0
Revised Surplus/(shortfall) 0
Resulting % Use Reduction from WSCP action 0%
2030 Total
Total Water Use 7,892
Total Supplies 7,892
Surplus/Shortfall w/o WSCP Action 0
Planned WSCP Actions (use reduction and supply augmentation) WSCP - supply augmentation benefit 0
WSCP - use reduction savings benefit 0
Revised Surplus/(shortfall) 0
Resulting % Use Reduction from WSCP action 0%

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8 WATER SHORTAGE CONTINGENCY PLAN
California Water Code Section 10632 requires suppliers to prepare and adopt a Water Shortage Contingency Plan (WSCP) consisting of each of the following elements:

8.1 Water Supply Reliability Analysis

8.2 Annual Water Supply and Demand Assessment Procedures

8.3 Six Standard Water Shortage Stages

8.4 Shortage Response Actions

8.5 Communication Protocols

8.6 Compliance and Enforcement

8.7 Legal Authorities

8.8 Financial Consequences of WSCP Activation

8.9 Monitoring and Reporting

8.10 WSCP Refinement Procedures

8.11 Special Water Feature Distinction
The WSCP presented in this Chapter follows this outline.

8.1 Water Supply Reliability Analysis
Water supplies may be interrupted or reduced by droughts, earthquakes, and power outages which hinder a water agency’s ability to effectively deliver water. Drought impacts increase with the length of a drought, as supplies in reservoirs and other storage programs are depleted and water levels in groundwater basins (where present) decline. The ability to manage water supplies in times of drought or other emergencies is an important part of water resource management for a community. In anticipation of such water supply challenges; the Water Code requires suppliers to prepare and adopt a Water Shortage Contingency Plan (WSCP), which includes water shortage response actions they would take in response to six standard levels of water shortage. This WSCP describes the water supply shortage policies the City has in place to respond to events including reductions and catastrophic interruption in water supply.

Every urban water supplier is required to assess the reliability of their water service to its customers under normal, dry, and multiple dry water years. The City depends solely on imported Colorado River water supplies, purchased from IID, to fully meet its demands. While there are various factors that could potentially impact Colorado River supplies (e.g., legal, environmental, water quality and climatic, all of which are discussed in Section 7.2 of this 2025 UWMP), IID has taken many proactive steps over the years to protect the integrity and legal authority of its Colorado River entitlements under the Law of the River provisions dating back for almost a century.

The long-term supply and demand assessment to year 2050 is included in Section 7.4 of this UWMP. As noted in Section 7.4, the City anticipates being able to meet all water demands with adequate supplies through the year 2050 under normal, dry, and multiple dry year conditions.

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The Drought Risk Assessment (DRA) for the next five years is included in Section 7.5 of this UWMP. As noted in Section 7.5, there are no shortages projected if a drought were to occur over the next five years, thus, no shortfall mitigation measures are anticipated.

8.2 Annual Water Supply and Demand Assessment Procedures Beginning in 2022, each supplier is required to prepare and submit to DWR an Annual Water Supply and Demand Assessment (AWSDA or Annual Assessment) on or before July 1 of each year. The Annual Assessment and associated reporting are to be conducted based on procedures outlined in this section.

Decision-Making Process
The Annual Assessment will be prepared by the Public Works Department and presented to the City Manager for formal approval. In the event there are projected water shortages, a presentation will be given to the City Council and recommendations will be made for water shortage response actions, if appropriate.

During the Annual Assessment, or during any subsequent unexpected water shortage period, Public Works will determine the extent of the conservation required based on water supply availability from IID’s Colorado River imported supplies. The City Manager will be requested to approve the Annual Assessment and any associated actions. In the event of a water shortage, the City Manager will request the City Council adopt a Water Reduction Plan, and any associated recommended actions, that are necessary to address the level of water shortage. The City’s shortage levels and corresponding Water Reduction Plan response actions are outlined in Section 8.4 of this WSCP and adopted in the City’s water conservation Ordinance 17-0165.

The Annual Assessment process will begin in January each year with the evaluation of supply and demand data along with current water supply conditions. A preliminary report will be presented to the City Manager and other appropriate Division Heads for their review by late March. A revised Draft Assessment will be prepared by late April, based on input from the City Manager and other key City staff members. The City Manager and Division Heads will determine any necessary shortage response actions and prepare a Final Draft Assessment by the end of May. If shortage levels are required, the City Council will be asked to set the appropriate level and response actions, as needed. Once approved, the Annual Assessment Report must be submitted to DWR by the July 1 deadline. Table 8-1A presents a timeline and summary of these steps.

Data and Methodologies
The purpose of the Annual Assessment is to evaluate the reliability of water supply for the coming year by assuming conditions will be dry and to determine how a perceived shortage may relate to WSCP shortage stage response actions. This information will be based on information available to the City at the time of the analysis. The Annual Assessment will utilize information from IID on the expected supply of imported Colorado River water and will also consider the unconstrained water demand, planned water use, and infrastructure conditions. The analysis will look at current year water supply and demand conditions and assumed dry year conditions for the following year. The conditions of what defines a dry year will be determined based on current information from available sources including IID, WRCC, USBR and other 65 Source: Ordinance No. 17-01 | Code of Ordinances | El Centro, CA | Municode Library

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applicable sources. The subsequent evaluation will likely involve historic hydrology typically used in the dryyear analysis for UWMPs. The balance between projected water supplies and anticipated demand will be used to determine what, if any, shortage stage is expected under the WSCP framework.

The following steps outline the procedures for completing the dry year supply and demand assessment.

1. Water Supply – Quantify water supply by each source for the current year and anticipated supply for the subsequent year. The City will rely on coordination with IID for projected supply availability.

2. Unconstrained Water Demands - Quantify unconstrained customer demand for the current year and one year to follow. Use current year water demand by sector (available from monthly billing data) and adjust as needed to account for weather, prior-year conditions, anticipated new demands for the coming year, and any other factors pertinent to the land use and customer use patterns.

3. Subsequent Dry Year Analysis - Determine how the following year’s supply and demand quantities will be impacted anticipating the year will be dry. Determine dry year conditions using methods similar to those used in the UWMP, which consider historical hydrology, data from IID and any additional applicable sources.

4. Infrastructure Considerations - Evaluate infrastructure capabilities and any constraints within the City that may affect the ability to deliver supplies to meet expected demand in the coming year, including delays in constructing anticipated capital improvement projects.

5. Other Factors - Address any other applicable factors that may influence or disrupt supplies.

6. Evaluation - Compare the anticipated supply and demand that have been calculated for the following year assuming dry conditions to determine any potential shortage in supply and the appropriate response action as developed in the WSCP.

The above steps will be documented with supporting text including coordination with IID and other agencies, data sources, and assumptions.

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Table 8-1A: AWSDA Timeline and Recommended Actions
Table 8-1A: AWSDA Timeline and Recommended Actions
Month(s) Recommended Actions
Data Gathering and Analysis Phase
Jan Assemble WSCP Team
Jan - Feb Collect water supply by source data for current year; describe and quantify sources by provider along with any current constraints and related adjustments Jan - Feb
Determine unconstrained water demand for current year; describe and quantify demand and any influencing factors on demand along with related adjustments
February Quantify "Dry Year" supplies and demands based on historical hydrologic data and input from IID
February Calculate the water supply reliability by comparing expected dry year supplies and demands to identify potential shortage. Utilize reporting spreadsheet.

March Determine any shortage and related actions
March Prepare and present preliminary report to City Manager and Division Heads for review and approval
Decision Phase
April Update Assessment based on input from City Manager and Division Heads; obtain final water supply data and other input from IID May If shortages are determined, use WSCP to determine protocol; recommend Water Reduction Plan based on shortage level
May Prepare Final Draft Annual Water Shortage Assessment Report including Water Reduction Plan as needed
June Present AWSDA Report to the City Manager for approval By July 1 Send Final Annual Water Supply and Demand Assessment Report to DWR As Needed Implement WSCP Water Reduction Plan as needed and approved by City Council

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8.3 Six Standard Water Shortage Stages
The WSCP is framed around six standard shortage levels set forth in California Water Code Section 10632(a)(3).66 Those six standard shortage levels correspond to progressive ranges of up to 10, 20, 30, 40, and 50 percent shortages, and greater than 50 percent shortages. Each of the six shortage levels represents an increasing gap between the City’s estimated supplies and the unconstrained demand as determined in the Annual Assessment or the gap between supply and demand at any time due to an unforeseen event that interrupts water supplies. A supplier’s existing WSCP may use different water shortage levels, providing they develop a cross-reference relating the supplier’s existing categories to the six standard water shortage levels specified in the CWC.

The City has established five water shortage levels as presented in Table 8-1B. Table 8-1B also references the water supply conditions, which lead to a declaration of the individual water shortage stages and the response actions taken following that declaration. The five water shortage levels used in this WSCP are referenced in Table 8-1B and graphically cross-referenced to the six CWC standard levels in Figure 8-1.

The cross-reference is also included in Submittal Table 8-1.

Table 8-1B: Water Shortage Contingency Plan Levels
Table 8-1B: Water Shortage Contingency Plan Levels
Shortage
Level
Percent
Shortage Shortage Response Actions
1 ≤ 10%
Projected supply is adequate or projected supply is insufficient to provide 90% of normal demand or contamination of 5% of water supply.

Actions:

1. Landscape runoff prohibited

2. CII lodging must offer to opt out of linen service

3. Restaurants may only serve water upon request

4. Water features must recirculate

5. Customers must repair leaks in a timely manner

6. Automatic shutoff of hoses

7. Prohibit use of potable water for washing hard surfaces

8. Expand public information campaign

9. Voluntary plumbing fixture replacement
2 20%
Projected supply insufficient to provide 80% of normal demand or contamination of 10% of water supply.

Actions (All Shortage Level 1 Restrictions plus these added actions):

1. Limit landscaping irrigation to specific times (< 10 a.m. or after 6 p.m.)

2. Limit landscape irrigation to specific days (3 days/week June 1-Sept 15; 2 days other times)

3. Watering of permanent trees allowed as necessary to keep them alive

4. Prohibit use of potable water for construction and dust control

5. Implement water allocations based on 2013 usage minus conservation

6. Improve customer billing

7. Provide rebates on plumbing fixtures, landscape irrigation and turf replacement as funding allows

8. Decrease line flushing

9. Increase water waste patrols

10. Implement drought surcharges and penalties
66 Source: https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?lawCode=WAT&sectionNum=10632

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3 30%
Projected supply insufficient to provide 70% of normal demand or contamination of 20% of water supply.

Actions (All Shortage Level 1-2 Restrictions plus these added actions):

1. Water features may not be filled or replenished

2. Prohibit vehicle washing except at facilities using recycled or recirculating water

3. Implement or modify drought rate structure (25% rate increase)

4. Require flow restrictors for washers
4 40%
Projected supply insufficient to provide 60% of normal demand or contamination of 30% of water supply.

Actions (All Shortage Level 1-3 Restrictions plus these added actions):

1. No watering of lawns or irrigation

2. No issuance of new construction meters

3. Moratorium or net zero demand increase on new connections

4. 50% rate increase and penalties for excess use
5 ≥ 50%
Projected supply insufficient to provide 50% of normal demand or contamination of 40% of water supply,
Actions (All Shortage Level 1-4 Restrictions plus these added actions):

1. 100% rate increase and penalties for excess use

2. Revise water allocations and rate structures as needed Figure 8-1: Corresponding Relationships Between El Centro’s WSCP Shortage Levels and CWC’s 2020 WSCP Standard Shortage Levels
El Centro’s
2020 WSCP
Stage
Supply
Condition/Shortage
CWC 2020
WSCP Standard
Shortage Levels
Shortage
Levels
1 ≤ 10% 1 ≤ 10%
2 20% 2 10 – 20%
3 30% 3 20 – 30%
4 40% 4 30 – 40%
5 ≥ 50% 5 40 – 50%
6 > 50%

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Table 8-1: Water Shortage Contingency Plan Levels
Table 8-1: Cross-reference for Standard vs Supplier
Shortage Levels
Standard
Shortage
Levels
Percent
Shortage
Range
Suppliers
Shortage
Levels
Percent Shortage
Range
1 Up to 10% 1 Up to 10%
2 Up to 20% 2 10 - 20%
3 Up to 30% 3 20 - 30%
4 Up to 40% 4 30 - 50%
5 Up to 50% 4 30 - 50%
6 >50% 5 Greater than or
equal to 50%

8.4 Shortage Response Actions
CWC requires the WSCP to contain shortage response actions that align with the defined shortage levels, and include:
• Demand reduction actions
• Supply augmentation actions
• Operational changes
• Mandatory prohibitions against specific water use practices that are in addition to state-mandated prohibitions and appropriate to the local conditions
• An estimate of the extent to which the gap between supplies and demand will be reduced by implementation of each action
City’s Supply Augmentation Actions
The City has only one source of supply, i.e., imported Colorado River water purchased from IID; however, as documented in Chapter 7 of this UWMP, that supply is extremely reliable based on IID’s Law of the River entitlements. If there is a specified shortage in supply as referenced in Table 8-1B, then it is assumed the City’s Colorado River water supply has either been inexplicably impacted or there is a catastrophic event (either natural or man-made) impacting the transmission of Colorado River water to El Centro.

Submittal Table 8-2 lists actions the City can take to augment its water supply. The table includes three specific actions the City can take including:
• Expanding the Public Information Campaign during Shortage Level 1

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• Improving Customer Billing during Shortage Level 2
• Implementing or Modifying the Drought Rate Structure or Surcharge during Shortage Levels 2, 3, 4 and 5.

Table 8-2: Supply Augmentation and Other Actions
Table 8-2: Supply Augmentation and Other Actions
Shortage
Level
Supply Augmentation Methods and Other
Actions by Water Supplier
How Much is this
Going to Reduce
the Shortage Gap?
Additional Explanation or
Reference
1 Expand Public Information Campaign 3.0%
2 Improve Customer Billing 0.5%
2 Implement or Modify Drought Rate
Structure or Surcharge 1.0%
3 Implement or Modify Drought Rate
Structure or Surcharge 6.0% Includes 25% Rate Increase
4 Implement or Modify Drought Rate
Structure or Surcharge 2.0% Includes 50% Rate Increase
5 Implement or Modify Drought Rate
Structure or Surcharge 5.0% Includes 100% Rate Increase City’s Demand Reduction Actions
When a Water Reduction Plan is not in effect, the City encourages all persons and entities within the service area to practice good potable water use by avoiding wasteful activities on a voluntary basis as specified in the City’s water conservation Ordinance 17-0167 and as further detailed in Chapter 28, Article III, Sections 28-50 through 28-55 of the El Centro City Code.68
A Water Reduction Plan will be implemented under water shortage conditions corresponding to the various shortage levels noted in Table 8-1B. When necessary, City staff will make appropriate recommendations to the City Council regarding the adoption of a Water Reduction Plan if needed to address the level of water shortage, under Ordinance No. 17-01, based on the Annual Water Supply Assessment or other pertinent water shortage events.

Submittal Table 8-3 summarizes the City’s demand reduction actions for each water shortage stage and provides an estimate of how much (by percentage of total water use) that action will reduce the overall shortage gap. Table 8-3 also notes whether a penalty, charge or other enforcement action will be assessed for non-compliance with the water restriction or prohibition.

67 Source: Ordinance No. 17-01 | Code of Ordinances | El Centro, CA | Municode Library 68 Source: https://library.municode.com/ca/el_centro/codes/code_of_ordinances?nodeId=CHCOTA_CH28WA

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Table 8-3: Demand Reduction Actions
Table 8-3: Demand Reduction Actions
Shortage
Level Demand Reduction Actions
How much is
this Going to
Reduce the
Shortage Gap?
Additional Explanation or
Reference
Penalty,
Charge, or
Other
Enforcement?
1 Landscape - Restrict or prohibit
runoff from landscape irrigation 1.0% Yes
1 CII - Lodging establishment must
offer opt out of linen service 0.5% Yes
1 CII - Restaurants may only serve
water upon request

0.5% Yes
1 Water Features - Restrict water
use for decorative water features,
such as fountains

1.0% Must use recycled or
recirculated water Yes
1 Other - Customers must repair
leaks, breaks, and malfunctions in
a timely manner

1.5% Yes
1 Other - Require automatic shut of
hoses 0.5% Yes
1 Other - Prohibit use of potable
water for washing hard surfaces 2.0% Yes
1 Expand Public Info Campaign 3.0% Yes
2 Landscape - Limit landscape
irrigation to specific times 1.0% Watering only allowed < 10 a.m. or > 6 p.m. Yes 2 Landscape - Limit landscape
irrigation to specific days 1.0%
3 days/wk. from June 1 to
September 15; 2 days/wk.
the rest of the year
Yes
2 Other - Prohibit use of potable
water for construction and dust
control

1.0% Yes
2 Other 1.0%
Implement Water
allocations based on
average 2013 usage minus
conservation savings
Yes
2 Improve Customer Billing 0.5% Yes
2 Provide Rebates on Plumbing
Fixtures and Devices 0.5% Yes
2 Provide Rebates for Landscape
Irrigation Efficiency 1.0% Yes
2 Provide Rebates for Turf
Replacement 1.0% Yes
2 Decrease Line Flushing 1.0% Yes
2 Increase Water Waste Patrols 1.0% Yes
2 Implement or Modify Drought
Rate Structure or Surcharge 1.0% Yes

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The City's Water Conservation Ordinance No. 17-01 lists conservation requirements that will take effect upon implementation by the City Council. These prohibitions will promote the efficient use of water, reduce, or eliminate water waste, and enable implementation of the City's Water Shortage Contingency Measures.

Water conservation measures become more restrictive with each progressive stage to address the increasing differential between water supply and customer demand.

Additional demand reduction actions, which are addressed in more detail in other sections of this WSCP, include the establishment of water conservation penalty rates and expanded public information efforts.

City’s Operational Changes
Operational response actions for a non-catastrophic water shortage, which are more fully described in other sections of this WSCP, may include the following:
• Improved water system monitoring and analysis
• More frequent tracking of customer water usage to aid in locating waste • Increased frequency of reporting
Table 8-3: Demand Reduction Actions (continued from prior page) Shortage
Level Demand Reduction Actions
How Much is
this Going to
Reduce the
Shortage Gap?
Additional Explanation or
Reference
Penalty,
Charge, or
Other
Enforcement?
3 Other water feature or swimming
pool restriction 2.0% Yes
3 Other - Prohibit vehicle washing
except at facilities using recycled
or recirculating water

2.0% Yes
3 Implement or Modify Drought
Rate Structure or Surcharge 6.0% 25% Rate Increase Yes
4 Landscape - Prohibit all landscape
irrigation 5.0% Yes
4 Other 1.0% No issuance of new
construction meters Yes
4 Moratorium or Net Zero Demand
Increase on New Connections 2.0% 50% rate increase and penalties for excessive use Yes 4 Other 2.0%
50% Rate Increase and
Higher Stage 4 penalties
for excessive use
Yes
5 Other 5.0% Higher Stage 5 penalties
for excessive use Yes
5 Other 5.0%
Revise Water Allocations
and Rate Structure as
Needed Including 100%
rate increase
Yes

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City’s Additional Mandatory Restrictions
There are no additional mandatory restrictions other than those outlined in Tables 8-1A and 8-3 and more fully detailed in Chapter 28, Article III, Sections 28-50 through 28-55 of the El Centro City Code.

Stages of Action to Respond to a Water Shortage Event
As previously noted, Table 8-1B summarizes the City’s five water shortage levels established by Ordinance 17-01. The City’s specific actions in responding to a declared shortage stage are described in more detail in the following sections.

8.4.5.1 Stages of Water Use Restrictions
Each stage shall remain in effect until conditions indicate a more or less restrictive stage is necessary, and action is taken by the City Council based on supply criteria identified in Table 8-1B. The City Council may enact any stage and need not proceed in order through the stages.

1. Enacting Water Rate Restrictions:

Stages 2-5 of the WSCP shall be enacted by the El Centro City Council declaring an emergency water restriction. Water supply conditions and goals for each restriction stage are outlined in Table 8-1B.

2. Modifying and Ending Water Use Restrictions:

For each month customer water use restrictions are in effect at Stage 2, 3, 4, or 5 under this WSCP, the City Manager shall report to the City Council on the status of the shortage and water use changes in the El Centro Water system, including a recommendation to maintain, change or end the water use restrictions. A water shortage event can be terminated by the City Council upon determination that “normal year” supplies have been secured by rainfall or other new supplies. A water shortage event involving sudden, unforeseen emergencies can be terminated by the City Manager or their designee upon a determination the emergency no longer exists. As soon as practicably possible, or at the next scheduled Council meeting, the City Manager or their designee shall share this termination decision with the City Council.

3. Water Rate Structure:

Water rates will return to the rate structure prior to the water shortage event upon the termination of the event.

8.4.5.2 Priority by Use
Priorities for use of available potable water during shortages were based on input from the City Emergency Response Team, citizen groups, and legal requirements set forth in the California Water Code, Sections 350-358. These priorities, which were originally established during development of the City’s 2010 UWMP, are still reasonable and have therefore been carried over into this WSCP. Water allocations are established for all customers according to the following ranking system:

1. Minimum health and safety allocations for interior residential needs (including single family, multi-family, hospitals and convalescent facilities, retirement and mobile home communities, student housing, firefighting, and public safety);

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2. Commercial, industrial, and institutional/governmental operations (where water is used for manufacturing and for minimum health and safety allocations for employees and visitors), to maintain jobs and economic base of the community (not for landscape uses);

3. Existing landscaping; and

4. New customers and proposed projects, which were without permits when a shortage is declared.

8.4.5.3 Health and Safety Requirements
Table 8-4A displays per-capita health and safety water requirements. In Stages 1, 2 and 3 shortages, customers may adjust either interior or outdoor water use (or both), to meet voluntary and mandatory water reduction goals.

Table 8-4A: Per Capita Health and Safety Water Quantity Calculations Table 8-4A: Per-Capita Health and Safety Water Quantity Calculations Fixture Non-Conserving Fixtures Habit Changes69 Conserving Fixtures70 Toilets 4 flushes x 3.5 GPF 14.0 3 flush x 3.5 GPF 10.5 4 flush x 1.6 GPF 6.4 Shower 5 min x 3.0 GPM 15.0 4 min x 3.0 GPM 12.0 5 min x 2.0 10.0 Washer 12.0 GPCD 12.0 11.0 GPCD 11.0 10.0 GPCD 10.0
Kitchen 4.0 GPCD 4.0 4.0 GPCD 3.0 4.0 GPCD 3.0
Other 4.0 GPCD 4.0 4.0 GPCD 4.0 4.0 GPCD 4.0
Gallons per person per day 49.0 40.5 33.4
CCF per person per year 24.0 20.0 16.0
However, under Stage 4 and Stage 5 mandatory rationing programs, the City has established a health and safety allotment of 50 GPCD (which translates to 18 billing Units per person per year, each billing Unit being 1,000 U.S. Gallons), because that amount of water is sufficient for essential interior water with no habit or plumbing fixture changes. If customers wish to change water use habits or plumbing fixtures, 50 GPCD is sufficient to provide for limited non-essential (i.e., outdoor) uses. Stage 5 mandatory rationing, which is likely to be declared only as the result of a prolonged water shortage or due to a disaster, would require that customers make changes in their interior water use habits (e.g., not flushing toilets unless “necessary” or taking less frequent showers).

Prohibitions on End Users
The City has prohibitions on end uses related to each stage of the WSCP as shown in Tables 8-1 and 8-2.

As previously noted, Table 8-3 also provides an estimate of how the noted demand reduction actions in the 69 Reduced shower use results from shorter length of shower and reduced flow. Reduced washer use results from fuller loads 70 Fixtures include ULF 1.6 GPF toilets, 2.0 GPM showerheads, faucet aerators and efficient clothes washers

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various stages will reduce the overall supply gap. Additionally, the table notes whether there is a penalty, charge, or other enforcement action for violation of the water restriction or prohibition.

8.4.6.1 Landscape Irrigation
Key water savings can be realized from restrictions involving landscape irrigation. Depending on the stage of action identified, the City of El Centro will be enforcing restrictions on irrigation including:
• Lawn and landscape watering restricted to specific days and times • Runoff from landscape irrigation is prohibited
• Certain types of landscape irrigation are prohibited

8.4.6.2 Commercial, Industrial, and Institutional (CII) Depending on the stage, CII restrictions include:
• Restaurants may serve water only upon request
• Lodging establishments must offer patrons an opportunity to opt out of linen service

8.4.6.3 Water Features and Swimming Pools
Depending on the water shortage stage, swimming pools are not to be filled.71

8.4.6.4 Other
Other prohibitions are enforced depending on the stage of action. Table 8-3 includes prohibitions categorized as “other” along with the appropriate action.

Consumption Reduction Methods
The methods used by the City to reduce consumption at each stage of WSCP enforcement are shown in Table 8-3. Additional information on those methods is provided below.

8.4.7.1 Water Allocations
The City of El Centro measures water in thousands of gallons where one Unit equals 1,000 U.S. gallons.

Section 8.4.6.3 establishes health and safety allotments of 50 GPCD. Specific water allocations by Stages are as follows:

Stages 2 and 3 Allocations:

The water allocation program for residential customers is based on average residential customer usage in base year 2013 for each month, less the percentage of conservation being required.

For example:
71 Water features are defined in greater detail in Section 8.11 of this WSCP.

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• During the 2015 drought, the percentage reduction for El Centro customers was 20% percent, so the drought allocation was 80 percent of year 2013 average monthly residential usage.

Stages 4 and 5 Allocations
In the event severe water allocations are required, single-family account allocations may be determined as follows: Assuming four persons or less per home, every account would receive 6 billing Units per month (50 GPCD x 4 persons), plus a percentage of their five-year average historic use based on the declared stage.

Percent allocations per declared water shortage stage are as follows: Stage 4: 20%; Stage 5: 10% For example:
• For an account that used 14 Units per month on average over a 5-year period and the City has declared a Stage 4 shortage:
• 6 billing Units + (14 Units x 20%) = 8.5 Units per month (rounded down to nearest 0.5). • Appeals would be available for additional people. For each additional person at a home, the allotment is increased by 1.5 Units per billing period (50 GPCD).

For all stages, Commercial, Industrial, and Institutional would receive a percentage reduction from historical use. The historical use period used to determine the baseline amount may vary based on specific factors.

Appeals would be available for increased business, changes in census data or other factors.

Individual customer allotments are based on a five-year period. This gives the City a more accurate view of the usual water needs of each customer and provides additional flexibility in determining allotments and reviewing appeals. However, no allotment may be greater than the amount used in the most recent year of the five-year base period, nor less than the public health and safety amount as determined in Section

8.4.6.3. The Finance Director will classify each customer and calculate each customer’s allotment according to the guidelines set forth in this section of the WSCP. The allotment shall reflect seasonal patterns. Each customer shall be notified of their classification and allotment by mail before the effective date of the Water Shortage Emergency. New customers will be notified at the time their application for service is made. During a disaster, it may not be possible to provide prior notice of allotment. In such an instance, notice will be provided by other means. Any customer may appeal the Finance Director’s classification on the basis of use or the allotment on the basis of an incorrect calculation.

Catastrophic Supply Interruption

8.4.8.1 Imperial Irrigation District Emergency Preparedness Plan During or immediately after any water supply emergency, IID staff implements the Emergency Preparedness Plan. The Emergency Preparedness Plan includes required actions and procedures by IID staff to respond to events that impair water operation of canals, laterals, drains, dams, and other facilities.

These responses are not normal operation and maintenance activities. Generally, any occurrence that requires an immediate response is classified as an extreme event or emergency.

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The Emergency Preparedness Plan defines the role each responsible employee will play during an emergency. Water Department staff conducts emergency and/or disaster response planning in the Water Control Center. Coordination of staffs with other departments will take place in the General Manager's conference room. All-American Canal River Division staff planning will be centered in the Imperial Dam Control House. Other staffs meet and coordinate actions at designated areas.

Established actions and procedures exist for extreme events and emergencies that endanger operation of the water system. Possible emergencies/extreme events that endanger operation of the water system could include earthquakes, storms, rain, run-off from desert washes, flooding, facility or structure damage, power outages, fire, vehicles in canals, equipment theft/vandalism, or other disaster. The Imperial Irrigation District's water delivery and drainage systems do not totally shut down during an emergency.

The Imperial Irrigation District's water delivery and drainage systems do not totally shut down during an emergency. The Imperial Irrigation District has conducted Emergency Preparedness Exercises in the past.

Emergency preparedness exercises will be updated with the development of new emergency preparedness exercises. Water Department staffs trained and participated with the U.S. Department of the Interior Bureau of Reclamation's Tabletop Exercise for emergency preparedness.

The cities in the Imperial Unit have a ten-day storage holding capacity requirement. The Imperial County Office of Emergency Services requires this storage holding capacity for cities (Imperial Irrigation District, 1998, p.22).

IID is considered a special district in the eyes of the state and the federal government. A special district must meet the same requirements as a local city pertaining to emergency preparedness and emergency management. As such, IID is required to go through the appropriate channels regarding mutual aid.

In the event of a natural and or man-made disaster, IID would open its Emergency Operations Center (EOC) located at headquarters in Imperial, California. IID would then notify the Operational Area, which is the Imperial County Office of Emergency Services located in Heber at the Imperial County Fire Department Station #2. If the event called for mutual aid IID, the EOC would request assistance from the OA. If the OA was unable to fulfill this request it would go to the next highest level, which would be the Regional Emergency Operations Center (REOC), located in Los Alamitos.

In the event the REOC was unable to fill the request it would go to the State Operations Center located in Sacramento, which would fill the request or ask for federal assistance from the Federal Emergency Management Agency a subsection of the Federal Department of Homeland Security.

8.4.8.2 City Response to Catastrophic Water Supply Reduction The City’s Emergency Response Plan (ERP), initially prepared in 2000 and updated seven times, was updated most recently by Risk Management Professionals, Inc. in July 2016. The 278-page document addresses all types of emergencies including fires, earthquakes, criminal acts, civil disorder, chemical and other hazardous spills as well as water system contamination and chlorine release. The ERP identifies specific responses to be implemented in each type of emergency and identifies individuals in various City departments and divisions who are responsible for implementing those actions. Water Division staff are specifically tasked with the following responsibilities following an emergency event:
• Act to protect life

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• Preserve water in storage
• Where water levels are high enough to threaten liquefaction after a seismic even, pump and store water in surface facilities
• Consider which facilities can be saved and which can be sacrificed • Isolate those areas that will take the longest to restore and arrange for emergency water distribution
• Establish collection points and ration water
• Place plastic bottles at various locations to serve immediate needs • Provide trucks with water tanks
• Start reserve pumping facilities
• Identify area that can be served with minimal repairs • Set priorities for repair
• Plan to restore service area-by-area
• Obtain input from the Emergency Operations Center on essential uses including pipeline condition
• Determine whether imported water remains available
Many of the above actions are specific to the immediate aftermath of a water disaster emergency; however, City Water Division personnel who are already trained in these responses will be better able to respond to water supply emergencies due to drought.

Upon a catastrophic water supply reduction, mandatory provisions to reduce individual urban consumer water use will be placed into effect. During a shortage, the City would increase media attention to the water supply situation and would step up public water education programs, encourage property owners to apply for landscape and interior water use surveys and continue to advertise the importance of customers installing efficient plumbing fixtures.

In the event of extended regional power outages, the City will use standby diesel generators to power critical functions at the water treatment plant. The fuel will be brought in as needed. In this way the residents of EI Centro would not lose their supply of potable water.

In the event of an earthquake that damages critical components of the water treatment plant, the City will divert irrigation water into the potable water distribution system. Under this scenario non-potable water would be delivered to City customers and the water would have to be boiled by each customer prior to potable water use. Boil orders would be issued in accordance with directives provided in the City’s ERP.

Water from the treatment plant could be delivered by diesel powered pumps to the City’s distribution system. If the All-American or Central Main Canal is damaged and unable to transmit water, the City will declare a water shortage emergency and will implement the appropriate conservation measures. The City will have approximately ten days of raw water storage to rely on from initiation of the emergency with these conservation measures in place.

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Seismic Risk Assessment and Mitigation Plan
As the result of legislation signed into law by former Governor Brown on October 9, 2015, Section 10632.572 of the California Water Code now includes the following language regarding UWMPs:
(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 multihazard mitigation plan under the federal Disaster Mitigation Act of 2000 (Public Law 106-390) if the local hazard mitigation plan or multihazard mitigation plan addresses seismic risk.

Recognizing that conducting a seismic risk assessment can be a lengthy and complex process, Section 10632.5(c) allows water suppliers to comply with the new Water Code requirement by submitting the relevant local hazard mitigation plan or multihazard mitigation plan, if available.

8.4.9.1 Imperial County Multi-Jurisdictional Hazard Mitigation Plan (MHMP) El Centro is complying with CWC Section 10632.5 by referencing Imperial County’s Multi-Jurisdictional Hazard Mitigation Plan Update (MHMP) dated January 2021. This 420-page Plan was adopted by the El Centro City Council on and by the Imperial County Board of Supervisors. Section 5.2 of this report addresses Seismic Risks73. The MHMP Update also addresses Seismic Risks in both Imperial County and El Centro, noting the probability of an earthquake occurring in the City is “Very High” and the likelihood that such an event will be of “High” severity. Several additional quotes extracted from the January 2021 Update are referenced in the paragraphs below.

As noted on page 125 of the report, “Over the last 100 years, the area has experienced eleven earthquakes of magnitude 6.0 or greater on the Richter scale with the strongest being a magnitude of 7.2 in 2010. The

7.2 earthquake of April 4, 2010 caused extensive damage to the Imperial County Administration Center and its equipment, when the suspended ceiling system collapsed. Had the building been occupied at the time of the earthquake, there is a high likelihood that injuries and/or deaths would have occurred.” The report also notes (page 125), “A moderate to severe incident with intense ground shaking in the populated areas of Imperial County could reasonably be expected to cause numerous casualties, extensive property damage, fire, road closures, disruption of rail systems, communication systems (particularly telephone systems), the County's extensive canal system, and utilities. In addition, health hazards would be posed by damaged sewer systems, waste treatment facilities, and the possible contamination of the County's potable water supply. Medical treatment facilities would most likely be overtaxed. Theft and looting would likely occur as well. The resultant disruption of the agricultural community would affect the local economy.”
72 Source: Bill Text - SB-664 Water: urban water management planning. (ca.gov) 73 Source: https://firedept.imperialcounty.org/wp-content/uploads/2019/10/ICMHMP.pdf

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Commenting on a previous significant El Centro earthquake (page 125), the report notes, “In 1940, an earthquake along the Imperial Fault registered 7.1 on the Richter scale. The epicenter was located east of El Centro. The ground was ruptured for 40 miles from Volcano Lake in Baja California to a point near the City of Imperial. Seven deaths occurred and property loss was in excess of $5 million. Eighty percent of the buildings in Imperial were destroyed; fifty percent of Brawley's structures were damaged. Indirect damage to crops was substantial due to the subsequent disruption of drainage and the occurrence of flooding.

Horizontal displacement across the completed but unfilled International Canal was 14 feet, 10 inches and the U.S.- Mexico boundary was permanently changed. The Alamo Canal in Baja California was also offset, and a local flood resulted from water spilling out of the broken channel.” The October 15, 1979 Imperial Valley Earthquake measuring 6.6 on the Richter Scale, caused damage to IID’s All American Canal, which brings Colorado River water into Imperial County and to El Centro.

With respect to seismic faults, the MHMP notes (pages 136-137) “There are nine fault zones, primarily northwest-trending, within Imperial County: San Andreas, Imperial, Algodones Sand Dunes, Calipatria, Boundary, Superstition Hills, Superstition Mountain, Laguna Salada, and Elsinore. The most significant fault within the County is the San Andreas, which extends from Mexico into northern California, and the maximum earthquake intensity predicted for this fault is a magnitude 8.3. This fault is located about 28 miles east of the Imperial Fault Zone. Within a few miles to the north of El Centro, there are several faults which have been active historically. Some of these are associated with the recorded 1951 earthquake involving the Superstition Hills fault, a well-documented quake, showing surface faulting.” The MHMP (page 140) notes, “Earthquakes are the principal geologic activity affecting public safety in Imperial County. They are a triggering event which permit the force of gravity to operate and create many secondary hazards from ground shaking, including: (1) differential ground settlement, soil liquefaction, rock and mudslides, ground lurching, and avalanches; (2) ground displacement along the fault; (3) floods from dam and levee failure, and seiches; (4) fires; and (5) the various adverse results of disruption of essential facilities and systems - water, sewer, gas, electricity, transportation, and communication (and notably in Imperial Valley, the irrigation and drainage system).”
With respect to Risk Assessment, the MHMP concludes (page 142) “Imperial County is clearly at high risk for a significant earthquake causing catastrophic damage and strains on response and mitigation resources.

Both property and human life are at high risk. The County experiences hundreds of minor quakes and tremblers each month from the myriad of faults in the area. As noted above, it is difficult to predict the severity of casualties and property damage that could result from an earthquake. The severity of casualties and property damage depend on the intensity of the earthquake, location of the epicenter to populated areas, and the time of day of the occurrence.”

8.4.9.2 April 4, 2010 Earthquake Impacts on El Centro’s Water and Wastewater Facilities
The Imperial Valley Press reported the following specific information regarding the impact of the 2010 Easter Sunday earthquake on El Centro’s water and wastewater infrastructure:74 74 Source: https://www.ivpressonline.com/news/reminders-of-imperial-valleys-2010-easter-earthquake-linger/article_c7ff262ae4b5-5e65-b866- acd762d65d02.html#:~:text=Aside%20from%20the%20shuttering%20of,Public%20Works%20Director%20Terry%20Hagen.

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“Aside from the shuttering of the city’s public library, the city of El Centro sustained significant damage to its water infrastructure. A 5-million gallon water tank on La Brucherie Road suffered a significant amount of damage.

The quake had shut down the old potable water treatment plant located near Eighth Street and Danenberg Road. The emergency prompted the state to grant the city approval to get its new water treatment plant online. What normally may have taken a couple of weeks was able to get approval within 48 hours….

The bolts that had anchored a water tower located near Eighth and Vine streets were also torn loose by the April 4, 2010, quake. It was approved for demolition after officials deemed it in danger of falling atop the nearby condominiums.

The wastewater plant fared a little better and didn’t require a complete shutdown.

All told, an estimated $5.1 million was spent on repairs to public facilities…. with part of the funding provided by the Federal Emergency Management Agency.”

8.4.9.3 Seismic Risk Assessment Conclusions
El Centro is located in a seismically active region underlain by multiple earthquake faults. Numerous seismic events have occurred over the past century, and it is highly probable such events will continue to occur in future years. Nevertheless, the City of El Centro has promptly replaced water infrastructure damaged during past seismic events and continues to maintain its facilities in good operational conditions.

8.4.9.4 Recent Seismic Analyses and Retrofits
The City has also been proactive in initiating seismic analyses of critical water infrastructure including a recent assessment of the chlorination system at the Water Treatment Plant.75 That report was commissioned to evaluate the capacity of the seismic support structures of the chlorination equipment to withstand a major seismic event. The report concluded:
“Overall, the chlorine process and storage equipment, and its structural support systems, were observed to have been designed using good engineering principles. The support configurations include lateral force-resisting structures or anchors to resist lateral forces that would be induced by earthquake forces. At this time there are no recommendations for the chlorine storage and distribution system, and it is considered to meet current CalARP (California Accidental Release Program) seismic requirements. The chlorine system is regarded as capable of withstanding the design level peak seismic ground motion forces for the site with a low risk of release of a regulated substance.”
In addition to the seismic analysis of the WTP Chlorination system, the City also seismically retrofitted its La Brucherie Reservoir following the April 2010 Earthquake. Other than these two facilities, the City has no other specific knowledge suggesting any of its water infrastructure requires structural seismic retrofitting. 75 City of El Centro Water Treatment Plant Seismic Assessment prepared by Olweny & Associates as a subconsultant to Risk Management Professionals, Inc., December 2019.

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8.5 Communication Protocols
In the event of a water shortage, the City Manager will direct City personnel to provide public education and notices to all water users within the City’s service area, advising them of the water supply conditions and required actions.

The City Manager is also authorized to monitor compliance among users, including a review of customer usage records and field observation or any other steps deemed necessary to enforce mandatory water conservation. Violations are subject to criminal, civil, and administrative penalties, and remedies, which are defined under this plan and in the City of El Centro Water Conservation Regulations and Restrictions. The City may penalize those who continue to willfully waste water by using an escalating series of remedies, up to discontinuing water service or installing flow-restricting devices. Remedies, in order of issuance, are:
• Warning letter
• Notice of Violation
• Administrative Citations with penalties of $100, $200, and up to $500 • Referral to the City Attorney and City Manager for civil or criminal prosecution • Water service restricted or shut off
Water waste violators will receive a Notice of Violation. A Notice of Violation does not carry a monetary penalty. Notices are followed by a site visit from a City code enforcement officer to verify if the issue has been resolved. If the problem has not been corrected, the code enforcement officer can issue an Administrative Citation. Each violation is treated on a per property basis, and not a per incident basis. For example, if a property owner has received Notice of Violation for a broken sprinkler head, the next observed violation on the property can result in an Administrative Citation, even if it is for a different fixture. If the problem persists, the case may be referred to the City Attorney and the offender’s water service may be restricted or shut off. Terminating a customer’s water service is not taken lightly and would occur only when other enforcement measures have not been effective. The City will consider the following factors as part of a decision regarding appropriate remedies:
• Is a drought response level in effect?
• Have prior enforcement remedies been applied?
• Is the violation affecting public health and safety?
• Is the amount of water being used in violation of adopted standards, restrictions, or prohibitions? • What is the impact of the violation?

8.6 Compliance and Enforcement
Wasting water is illegal at all times, even when no drought response levels are in effect. Additionally, the City’s Water Conservation Regulations and Restrictions prohibit all water waste. The regulations define violations of both the permanent water conservation measures and mandatory conservation measures for Drought Response Stages 1 through 5.

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As noted in Section 8.5, violations are subject to criminal, civil, and administrative penalties, and remedies, including administrative citations ranging from $100 to $500 as defined under this plan and in the City of El Centro’s Water Conservation Regulations and Restrictions. Suspected violators will be notified in accordance with the protocol set forth in Section 8.5 of this WSCP. Additional penalties or charges associated with a violation of the WSCP under a given stage of enforcement are shown in Table 8-4B.

Table 8-4B: WSCP Penalties and Charges
Table 8-4B: WSCP Penalties and Charges
Penalty or Charges Stage When Penalty Takes Effect
25% Rate Increase 3
50% Rate Increase 4
100% Rate Increase 5
Penalty for Excess Use
(1% surcharge for each 1% over allocation) 2
Penalty for Excess Use
(2% surcharge for each 1% over allocation) 3
Penalty for Excess Use
(3% surcharge for each 1% over allocation) 4
Penalty for Excess Use
(4% surcharge for each 1% over allocation) 5

8.7 Legal Authorities
California Water Code Section 10632(a)(7)76 requires the City to provide:

A. A description of the legal authorities that empower the urban water supplier to implement and enforce its shortage response actions that may include, but is 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 of the CWC.

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.

Legal Authority to Regulate a Municipal Water Utility
Section 28-10 of the El Centro Municipal Code77 provides the City Council with the legal authority and administrative power to regulate its municipal water utility service through the following codification:
76 Source: https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?lawCode=WAT&sectionNum=10632 77 For a full reading of the City’s Water Code including its water conservation provisions, please refer to:
https://library.municode.com/ca/el_centro/codes/code_of_ordinances?nodeId=CHCOTA_CH28WA

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“The city council reserves the right and power to, and may from time to time by resolution adopt rules and regulations for the operation and maintenance of the water department of the city, and for furnishing water to users; and by resolution may establish and modify from time to time the rates, charges, deposits, and collections including penalties and procedures all relating to the installation, maintenance and termination of water service; and may from time to time by resolution prescribe rules for the extension of water mains within the boundaries and outside the boundaries of the city.”
Legal Authority to Implement Water Shortage Response Actions Chapter 28, Article III of the City’s Municipal Code, Water Conservation Regulations and Restrictions, Sections 28-50 through 28-59 provide the City Council with the authority to establish water conservation regulations and restrictions during times of drought or other water emergencies. Specifically, Section 28- 51 states:
“The water department shall monitor and evaluate the projected supply and demand for water by its customers and any state proclamations regarding drought conditions. In the event of a water shortage and/or statewide drought, the water department shall recommend that the council make a determination, by resolution, that a water shortage exists and that the appropriate water conservation plan shall take effect, as provided in this article. The city council may discontinue any stage or may implement another stage as necessary. Upon a finding by the city council that a water shortage no longer exists, any water shortage stage then in effect shall terminate.”
Additionally, the City’s legal authority to enforce water shortage response actions comes from Section 1009 of the Water Code. More specifically, Water Code Sections 370-37478 deal with allocation-based pricing and Water Code Sections 375-37879 deal with water conservation. Any supplier of water in this state for municipal use, including the state, or any city, county, city and county, district, individual, partnership, corporation, or any other entity, may undertake a water conservation program to reduce water use and may require, as a condition of new service, that reasonable water-saving devices and water reclamation devices be installed to reduce water use.

Legal Authority to Declare a Water Shortage Emergency
Section 28-51 of the Municipal Code (referenced above) also allows the City Council to determine in conjunction with State drought proclamations, that a water shortage exists and implement an appropriate stage of its water conservation plan, thus complying with the Water Shortage Emergency provisions of California Water Code, Chapter 3 (commencing with Section 350) of Division 1.80 78 Source: https://leginfo.legislature.ca.gov/faces/codes_displayText.xhtml?lawCode=WAT&division=1.&title=&part=&chapter=3.4.&article= 79 Source: https://leginfo.legislature.ca.gov/faces/codes_displayText.xhtml?lawCode=WAT&division=1.&title=&part=&chapter=3.5.&article= 80 Source: Law section (ca.gov)

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8.8 Financial Consequences of WSCP Activation

8.8.1.1 Drought Rate Structure and Surcharges
Drought Rate increases will be necessary during a prolonged water shortage. As described in this WSCP, a Stage 2 shortage will be accompanied by a 20% reduction in water deliveries while Stages 3, 4 and 5 shortages will be accompanied by 30%, 40% and 50% (or greater) reductions, respectively. When a Water Shortage Emergency is declared, the supply shortage will trigger the appropriate Rationing Stage and rate increase. All surplus revenues the City collects are currently used to fund the Rate Stabilization Fund, conservation, and other capital improvements. The City has estimated projected ranges of water sales by shortage stage to better understand the impact each level of shortage will have on projected revenues and expenditures by each shortage stage. Based on that analysis, the water conservation penalties and charges set forth in Table 8-2 A were established.

In anticipation of reduced sales after a declared shortage ends, the City's rates will be set for one year at 115% of the pre-shortage rates. Any excess revenues collected, which result from this rate adjustment will be redirected to the Rate Stabilization Fund.

8.8.1.2 Use of Financial Reserves
To mitigate the financial impacts of a water shortage, the City has established an Emergency Fund. The goal is to maintain the fund at 75% of normal annual water department revenue. This fund will be used to stabilize rates during periods of water shortages or disasters affecting the water supply. The City will not have to increase rates as much or as often during a prolonged or severe shortage with this fund in place.

8.8.1.3 Other Measures
One measure used to help overcome revenue and expenditure impacts is implementing a decrease in capital expenditures. This will result in an increase in savings to the General Fund, but it could also cause a delay of system rehabilitation and a decrease the quality of future system facilities.

Another proposed measure to overcome revenue and expenditure impacts is decreasing O&M expenditures. This will provide increased savings to the General Fund but may also result in less staff available to respond to emergencies and reduced maintenance frequency of system facilities.

8.9 Monitoring and Reporting
Reporting Protocol
Under normal water supply conditions, potable water production figures are recorded daily. Totals are reported weekly to the Water Treatment Facility Supervisor. Totals are reported monthly to the Public Works Director and incorporated into the water supply report.

During a Stage 1 Water Conservation Declaration, daily production figures are reported on a monthly basis to the Supervisor and compared against targets. During Stage 2 water shortage, daily production figures are reported to the Supervisor. The Supervisor compares the monthly production to the target monthly production to verify the reduction goal is being met. Monthly reports are forwarded to the Finance Director

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to implement appropriate actions and the Water Shortage Response Team (Department heads and City Manager). Reports are sent to the City Council as needed; however, for catastrophic water failures, reporting frequency will be increased as needed for adequate response. If reduction goals are not met, the Manager will notify the City Council so corrective action can be taken.

During a Stage 3 water shortage, daily production figures are reported to the Supervisor. The Supervisor compares the weekly production to the target weekly production to verify the reduction goal is being met.

Weekly reports are forwarded to the Finance Director and the Water Shortage Response Team. Monthly reports are sent to the City Council; however, for catastrophic water failures, reporting frequency will be increased as needed for adequate response. If reduction goals are not met, the Manager will notify the City Council so corrective action can be taken. During a Stage 4 or Stage 5 water shortage, the procedure listed above will be followed, with the addition of a daily production report to the City Manager.

During emergency shortages, production figures are reported to the Supervisor hourly and to the Manager and the Water Shortage Response Team daily. Daily reports will also be provided to the City Council and the Imperial County Office of Emergency Services.

Determining Water Shortage Reductions
The City uses meters to monitor the effectiveness of each stage of action or drought response level. The City meters both water supplies entering the distribution system, and water consumed by individual customers. The City can compare this meter data with usage in prior months and during non-drought years to determine if it is achieving specific percentage reduction goals for water consumption associated with the drought response levels. If the goals are not being met, the City can implement additional consumption reduction methods. The City is also required to report total monthly production to the SWRCB in compliance with California Executive Orders B-29-15 and B-36-15.

The City is also in the process of completing the replacement of all existing water meters with smart meters which will allow real-time tracking of individual water service consumption and allow customers to better track their own usage and savings (this project is currently about 95% complete).

8.10 WSCP Refinement Procedures
The WSCP is a dynamic document prepared and implemented as an adaptive management plan. Based on the monitoring and reporting program presented in Section 8.9, the City will evaluate the need to revise its WSCP. The WSCP will be refined as needed to ensure the shortage response actions are effective and produce the desired results. If potential refinements or new actions are identified, the City will evaluate their effectiveness and incorporate them into the WSCP, if deemed appropriate. The action will be identified and implemented at the appropriate water shortage level. Refinements to the WSCP will be presented by the Water Division Manager and to the City Council for approval and adoption, including any necessary additions or revisions to the Municipal Code.

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8.11 Special Water Feature Distinction
Water Code Definition of Water Features
Section 10632(10)(b) of the CWC81 defines water features as follows:
“For purposes of developing the water shortage 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.” Health and Safety Code Water Feature Provisions
Section 1159219(a) of the California Health and Safety Code82 includes the following defining language:
“Swimming pool” or “pool” means any structure intended for swimming or recreational bathing that contains water over 18 inches deep. “Swimming pool” includes in-ground and aboveground structures and includes, but is not limited to, hot tubs, spas, portable spas, and nonportable wading pools.”
Depending on the City of El Centro Water Conservation Stage, decorative ponds, fountains, and other waterscape features are not to be filled or replenished. Fountain pumps should remain off to minimize evaporation.
81 Source: https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?lawCode=WAT&sectionNum=10632 82 Source: https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?sectionNum=115921.&lawCode=HSC

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9 DEMAND MANAGEMENT MEASURES
The goal of the Demand Management Measures (DMM) section is to provide a comprehensive description of the water conservation programs that a supplier has implemented, is currently implementing, or plans to implement to meet its urban water use reduction targets. The reporting requirements for DMM was significantly modified and streamlined in 2014 by Assembly Bill 2067. For a retail agency such as the City, the requirements changed from having 14 specific measures to six more general requirements plus an “other” category, as set forth in CWC Sections 10631(e)(1)(A) and (B) which reads:83 CWC 10631(e)(1)
(A) The narrative shall describe the water demand management measure that the supplier plans to implement to achieve its water use targets pursuant to 0608.20. (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.

9.1 Water Waste Prevention Ordinances
In response to the 2014-2015 drought, the El Centro City Council adopted Resolution 14-78 on July 29, 2014 approving Water Conservation Measures in compliance with SWRCB 2014-38. This Resolution established prohibitions on a series of wasteful water uses and established fines varying from warnings to $500/day for first through fifth violation offenses.

On June 16, 2015, the City Council passed Resolution No. 15-55 repealing Resolution No. 14-78, which no longer met new regulations specified in SWRCB Water Conservation Resolution No. 2015-0032. The new Resolution declared a Water Shortage existed and implemented a Level 2 Water Conservation Plan.

On the same day Resolution 14-78 was repealed and replaced with Resolution 15-55, the City Council also adopted Ordinance No. 15-07 establishing Water Conservation Regulations and Restrictions and Levels of Water Conservation Plans, which became effective immediately. Ordinance No. 15-07 amended Chapter 28 of the El Centro Municipal Code by adding Article III entitled “Water Conservation Regulations and Restrictions.” Newly adopted Section 28-50 of the City Code stated:
83 Source: https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?lawCode=WAT&sectionNum=10631

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“It is hereby resolved by the City Council that in order to conserve the City' s water supply for the greatest public benefit and to reduce the quantity of water used by the City' s customers, wasteful use of water should be eliminated. It shall be unlawful for any person, firm, partnership, association, corporation, political entity (including the city) or any other water department customer to use water in a manner inconsistent with this regulation.” On February 21, 2017, the City Council adopted Ordinance No. 17-01 repealing in its entirety SECTION 1, Chapter 28, Article III, Sections 28-50 through 28-55 of the El Centro City Code and readopted revised and updated language relating to Water Conservation and Water Shortage Contingency Rules and Regulations.

Ordinance No. 17-01 also established provisions for prohibitions against water waste and water supply shortage contingency implementation plans. The new Ordinance established five Stages of Water Reduction Plans, ranging from voluntary measures in Stage 1 to a series of increasingly stricter mandatory prohibition measures in Stages 2 through 5. The provisions and water conservation measures to be implemented in response to each shortage phase are described in Section 8 of this UWMP. A copy of Ordinance No. 17-01 is included in Appendix C.

9.2 Metering
The City of El Centro is fully metered as required by Chapter 28 (Water), Article I, Section 28-1 of the Municipal Code.84 Generally, meters older than 10 years are inspected and replaced if necessary. The City reads the meters and bills customers monthly based on the volume of water used, the size of the meter and the type of connection. The City keeps records of the historical usage, meter size and type of connection.

In 2016, the City began replacing old existing water meters at their current in-service location with an AMR/AMI (Automatic Meter Reading/Advanced Metering Infrastructure) system. This replacement program has improved the City’s operational efficiency through improved customer service and allows for the early identification of water leaks thus resulting in a more reliable supply.

This replacement program provides the following benefits:
• Improved customer service
• Improved data collection and billing accuracy
• Reduced customer complaints
• Improved billing with real-time data
• Early identification of customer water leaks
• Reduction in theft of service
• A customer information system website
• Remote shut-off and turn-on of service for late-payment • Cost savings in meter reading
84 Source: https://library.municode.com/ca/el_centro/codes/code_of_ordinances?nodeId=CHCOTA_CH28WA

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• Improved staff monitoring of citywide water consumption

9.3 Conservation Pricing
The City encourages its residents and businesses to implement voluntary water conservation practices as described in Section 28-50 of the Municipal Code. Examples of good water conservation practices regarding irrigation watering hours, water runoff, car washing, cleaning driveways and sidewalks, and use of water features are also posted on the City’s website.85 The City does not have a tiered rate structure (sometimes also referred to as a water conservation rate structure) whereby customers are charged higher unit rates for increasing levels (or tiers) of usage.

However, by encouraging customers to employ good water conservation practices, the City is in essence offering a form of conservation pricing because using less water translates directly into lower monthly water bills.

As noted in Chapter 8, during a Stage 3, 4 or 5 Water Shortage, the City will implement 25%, 50% and 100% penalties on top of basic water charges. Additionally, the City will levy a surcharge 1%, 2%, 3% or 4% for each 1% over a customer’s allotted water allocation during Stages 2, 3, 4 and 5, respectively. Taken as a whole, these charges represent Water Conservation Pricing during a drought emergency.

9.4 Public Education and Outreach
City Programs
The City has traditionally participated in various education and outreach programs to inform the public of water conservation goals and methods. Traditionally, the City promotes water conservation through its participation in the following activities:
• Offering rebates on water conserving plumbing fixtures • Communicating water usage information via water bills (e.g., comparing a customer’s water with that of other similar customers)
• Issuing water conservation related press releases
• Publishing newspaper articles relating to the benefits of water conservation • Incorporating water conservation news into City Newsletters • Posting informative water conservation information on the City’s website (refer to the “Save Our Water” link cited in the previous footnote
• Using social media and other online tools to promote water conservation • Providing school education programs
• Staffing information booths at fairs and public events 85 Source: http://www.cityofelcentro.org/pworks/index.asp?m=1&page=66&subpage=24

City of El Centro
Chapter 9 2025 Urban Water Management Plan
9-4
Regional Programs
IID is the Regional Water Purveyor for Imperial County. In recognition of the importance of water conservation to the region, IID Board of Directors established a Water Conservation Advisory Board (WCAB)86 in July 1979. The WCAB was created to provide information and input related to water use efficiencies, for both system and on-farm water management practices, to the IID Board of Directors and the public. The WCAB consists of a total of 15 water users, three from each division, who are appointed by the five IID Directors. Additionally, IID provides grants to the water purveyors they serve for water conservation projects such as pipeline replacement and leak detection. IID additionally maintains a detailed Water Conservation page on its website.

The Water Conservation page cites the following specific activities, which comprise important elements of IID’s overall water conservation program:
• Water Apportionment – IID manages its Colorado River water supply through its Equitable Distribution Plan (EDP), which provides an annual apportionment framework for agricultural water users. The EDP is intended to promote the equitable distribution of available water supplies, support long-term resource management, and encourage efficient water use throughout the Imperial Valley. Under the EDP, agricultural water users receive annual water apportionments and may utilize approved transfer and conservation mechanisms to help manage water supplies while maintaining operational flexibility. The EDP was most recently revised and adopted by the IID Board of Directors on July 26, 2023
• Fallowing and On-Farm Conservation Programs – IID implements a variety of voluntary agricultural conservation programs that reduce consumptive use while providing operational flexibility to participating growers. These programs have included farm unit fallowing, deficit irrigation, and onfarm efficiency improvements designed to conserve Colorado River water. Conserved water generated through these programs may be used to support water transfer obligations, Colorado River system conservation efforts, or other water management objectives authorized under applicable agreements. Conservation program participation and water savings vary from year to year based on water supply conditions, funding availability, and program requirements. • System Conservation – IID continues to implement system conservation measures that improve the efficiency, reliability, and operational flexibility of its water delivery system. These efforts include canal and distribution system improvements, operational enhancements, automation, water measurement technologies, and projects designed to reduce operational losses and improve water management. System conservation projects remain an important component of IID's overall conservation program and contribute to regional efforts to improve Colorado River water supply reliability
• The All-American Canal Lining Project – The All-American Canal Lining Project is a major longterm conservation project that reduces canal seepage losses and generates conserved water for use within Southern California. Through this project, approximately 67,700 acre-feet of water are conserved annually, thereby improving the reliability of Colorado River water supplies and contributing to regional conservation objectives
86 Information on the WCAB is available on IID’s website: https://www.iid.com/government/water-conservation-advisory-board

City of El Centro
2025 Urban Water Management Plan Chapter 9
9-5
• IID-MWD Water Conservation Agreement – IID and the Metropolitan Water District of Southern California (MWD) continue to implement the water conservation agreement originally executed in 1988 and subsequently amended. Under this program, MWD funds specific water conservation projects within IID's water delivery system in exchange for conserved water generated by those projects. The agreement currently provides for the transfer of approximately 105,000 acre-feet of conserved water annually and remains an important component of IID's long-term water conservation portfolio.

And lastly, IID also provides water conservation tips on its California Drought Information page to the seven cities it serves (including El Centro) in Imperial County.87

9.5 Programs to Assess and Manage Distribution System Real Loss The City provides routine and planned system maintenance to prevent system water losses. As previously noted, the City’s AMR/AMI installation program allows better management of the production, storage, and distribution of water. This replacement program also assists the City in substantially decreasing nonrevenue water by detecting water loss both in the distribution network and at customer endpoints.

Additionally, the City has identified pipeline replacement projects in the City of El Centro 2026 Water Master Plan Update totaling 5.5 miles.

9.6 Water Conservation Program Coordination and Staffing Support The City’s water conservation efforts are being coordinated through the stormwater program, which is being administered by the Environmental Compliance Division of the Public Works Department and headed by a staff Environmental Specialist.

9.7 Other Demand Management Measures Implemented Over the Past Five Years
In addition to the previously referenced AMR/AMI meter program, the City has also repaired pipelines and other water system appurtenances over the past five years, as required to limit system leakage and to allow for the collection of more accurate water usage data.
87 Source: https://www.iid.com/water/ca-drought-information

City of El Centro
2025 Urban Water Management Plan Chapter 10
10-1
10 PLAN ADOPTION, SUBMITTAL, AND IMPLEMENTATION
Recognizing that close coordination among other relevant public agencies is key to the success of its UWMP, the City worked closely with IID, its wholesaler, in the development and updating of this planning document. The City also encouraged public involvement by holding a public hearing for residents to learn and ask questions about their water supply.

This section provides the information required in Article 3 of the Water Code related to adoption and implementation of the UWMP. Table 2-4 A, included in Chapter 2 of this UWMP, summarized external coordination and outreach activities carried out by the City and the corresponding levels of participation by those parties. A copy of the UWMP checklist, which was used to confirm compliance with the Water Code, is provided in Appendix A.

10.1 Inclusion of All 2025 Data
All water usage and planning data referenced in this report for the current year is for the calendar year beginning on January 1, 2025 and ending on December 31, 2025.

10.2 Notice of Public Hearing
Table 10-1 provides information on the notification process used by the City to inform its own internal staff as well as the Imperial Irrigation District and Imperial County of the preparation of this UWMP and the date of the public hearing. Please note the City of El Centro does not serve water to any other cities outside its jurisdictional boundaries.

Notification of the public hearing was also provided to the public via two separate notices published in the Imperial Valley Press on August 18, 2026 and August 25, 2026. A copy of the proof of publication is included in Appendix D. A copy of the Final Draft of El Centro’s 2025 UWMP was also posted on the City’s website.

Table 10-1 Retail: Notification to Cities and Counties
Table 10-1 Retail: Notification to Cities and Counties
City Name 60 Day Notice Notice of Public Hearing
El Centro Yes Yes
Imperial Irrigation District Yes Yes
County Name 60 Day Notice Notice of Public Hearing
Imperial County Yes Yes

10.3 Public Hearing and Adoption
A public hearing was held in the City of El Centro Council Chambers on September 1, 2026 at the City Council meeting, which began at 6:00 p.m. At the conclusion of that public hearing, the City Council adopted this UWMP along with the WSCP by Resolution No. 26-XX. A copy of the Resolution is included in Appendix E.

City of El Centro
Chapter 10 2025 Urban Water Management Plan
10-2

10.4 Plan Submittal
Following its adoption, the 2025 UWMP, including its accompanying WSCP, will be submitted electronically to DWR through the WUE Data Portal. A copy of all required DWR Tables included in this UWMP (all tables not having a letter designation) is also included in Appendix B.

A CD containing a digital copy of the 2025 UWMP and WSCP will also be submitted to the California State Library, Imperial County, and the Imperial Irrigation District within 30 days of the date of adoption.

10.5 Public Availability
The 2025 UWMP and WSCP will be posted on the City’s website and made available to the public within 30 days of the date of adoption.

10.6 Amending an Adopted UWMP or WSCP
Should the City amend this adopted UWMP and/or WSCP, it will follow each of the steps for notification, public hearing, adoption, and submittal referenced in this Chapter.

City of El Centro
2025 Urban Water Management Plan References
References Page 1

REFERENCES
Arachnoid.com, Current Lake Mead Water Levels – Historical and Current (1935 – 2026), https://arachnoid.com/NaturalResources/
California Department of Water Resources, State Water Resources Control Board, California Bay Delta Authority, California Energy Commission, California Department of Public Health, California Public Utilities Commission and California Air Resources Board, 20x2020 Water Conservation Plan, February 2010, https://www.waterboards.ca.gov/water_issues/hot_topics/20x2020/docs/20x2020plan.pdf California Irrigation Management Information System (CIMIS) website (http://www.wrcc.dri.edu/cgibin/cliMAIN.pl?ca2713) California Legislative Information, CWC, Chapter 3, Water Shortage Emergencies, Law section (ca.gov) California Legislative Information, CWC, Urban Water Management Planning, https://leginfo.legislature.ca.gov/faces/codes_displayText.xhtml?lawCode=WAT&division=6.&title=&part=2.6.&chapter=3.&article=2 California Legislative Information, Government Code, Chapter 7, California Emergency Services Act, https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?lawCode=GOV&sectionNum=8558 California Legislative Information, Health and Safety Code, Division 104, Part 10, Chapter 5, Article 2.5, The Swimming Pool Safety Act,
https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?lawCode=WAT&sectionNum=10632 California Legislative Information, Senate Bill 664, Chapter 681, Water Code Section 10632.5, Bill Text - SB664 Water: urban water management planning. (ca.gov) California, The Natural Resources Agency, Department of Water Resources, Division of Regional Assistance, Water Use Efficiency Branch – Urban Water Management Plan Guidebook 2025, Final January 2026, Final 2025 Urban Water Management Plan Guidebook California, The Natural Resources Agency, Department of Water Resources, Division of Regional Assistance, Water Use Efficiency Branch – Urban Water Management Plan Guidebook 2025, Final January 2026, Appendix O, Energy Information Reporting, https://water.ca.gov/-/media/DWR-Website/WebPages/Programs/Water-Use-And-Efficiency/Urban-Water-Use-Efficiency/Urban-Water-Management-Plans/Final-2020- UWMP-Guidebook/Appendix-O---UWMP-2020.pdf
City of El Centro, 2025 Consumer Confidence Report, PW-Water Quality Report-2025 City of El Centro, Final Vision 2050 Strategic Plan, Adopted December 1, 2015, Vision-2050-Strategic-Plan-PDF City of El Centro, Final General Plan, February 2004, Planning Documents | El Centro, CA City of El Centro, General Plan 2040, Land Use Element, June 2021, Prepared by City Place Planning, Land-Use-Element-PDF
City of El Centro, General Plan Update, Draft Program Environmental Impact Report, prepared by Harris & Associates, March 2021, El-Centro-General-Plan-Update-Draft-Program-Environmental-Impact-Report-PDF City of El Centro 2021-2029 Housing Element, August 2021, City of El Centro 2021-2029 Housing Element City of El Centro, Municipal Code, Chapter 28, Water, Code of Ordinances | El Centro, CA | Municode Library

City of El Centro
References 2025 Urban Water Management Plan
References Page 2
City of El Centro, Ordinance No. 15-07, Water Conservation Regulations, https://library.municode.com/ca/el_centro/ordinances/code_of_ordinances?nodeId=719375 City of El Centro, Ordinance No. 17-01, Water Conservation Regulations and Restrictions, Ordinance No. 17- 01 | Code of Ordinances | El Centro, CA | Municode Library City of El Centro, Public Works Department Website, Water Conservation, Save Our Water, http://www.cityofelcentro.org/pworks/index.asp?m=1&page=66&subpage=24 City of El Centro, Service Area Plan (SAP), Prepared by Rick Engineering, February 2016, http://www.cityofelcentro.org/userfiles/file/Planning/Final%20Service%20Area%20Plan%20(3-28-16)%20Reduced.pdf City of El Centro, 2020 Urban Water Management Plan, prepared by Psomas, June 2026, Urban-WaterManagement-Plan-PDF City of El Centro, Water Treatment Plant Seismic Assessment, prepared by Olweny & Associates, subconsultant to Risk Management Professionals, Inc., December 2019 City of El Centro, Water System Master Plan, Prepared by Dudek, Final Report, January 2026, CITY OF EL

CENTRO / WATER MASTER PLAN UPDATE
Congressional Research Service, Management of the Colorado River: Water Allocations, Drought, and the Federal Role, Updated December 15, 2020, https://crsreports.congress.gov/product/pdf/R/R45546 Imperial County, Multi-Jurisdictional Hazard Mitigation Plan, January 2021.

Imperial_County_MHMP_2021_Plan_Update_2021_01_11.pdf
Imperial Irrigation District, California Drought Information, https://www.iid.com/water/ca-drought-information Imperial Irrigation District, Equitable Distribution Plan, last Revised July 26, 2023, https://www.iid.com/home/showpublisheddocument/20254/638313266942930000 Imperial Irrigation District, Integrated Regional Water Management Plan, GEI Consultants, Inc., October 2012, Imperial Integrated Regional Water Management Plan | Imperial Irrigation District Imperial Irrigation District, Law of the River Resource Guide, January 2018, https://www.iid.com/home/showpublisheddocument?id=16799 Imperial Irrigation District, Quantification Settlement Agreement, 2016 Implementation Report, 2019 QSA Implementation Report
Imperial Irrigation District Website, Water Subpage and numerous other pages, https://www.iid.com/water#:~:text=Of%20the%20water%20IID%20transports,top%2010%20agricultural%20regions%20nationwide Imperial Irrigation District Website, Water Quality Subpage, https://www.iid.com/water/water-supply/water-quality SCAG (Southern California Association of Governments), Local Data Exchange Data/Map Book, Draft April 2026, 26-416-RDPLDX-0056-El-Centro.pdf
SCAG, Demographics and Growth Forecast, Technical Report, Adopted September 3, 2020, https://scag.ca.gov/sites/main/files/file-attachments/0903fconnectsocal_demographics-and-growthforecast.pdf?1606001579#:~:text=While%20the%20region's%20growth%20rate,%2C%20domestic%20migration%2C%20a nd%20immigration.

SCAG, Final RHNA (Regional Housing Needs Assessment) Methodology Data Appendix, adopted March 5, 2020, https://scag.ca.gov/sites/main/files/file-attachments/scag-final-rhna-data-appendix-030520.pdf?1602189406

City of El Centro
2025 Urban Water Management Plan References
References Page 3
SCAG, 6th Cycle RHNA adopted March 4, 2021, adopted March 4, 2021, https://scag.ca.gov/sites/main/files/fileattachments/6th-cycle-rhna-final-allocation-plan.pdf?1616462966 SCAG, Pre-Certified Local Housing Data Report for the City of El Centro, https://scag.ca.gov/sites/default/files/old/file-attachments/el-centro-he-0421.pdf?1620798251 SCAG, Profile of the City of El Centro, May 2019, https://scag.ca.gov/sites/main/files/fileattachments/elcentro_localprofile.pdf?1605653707 U.S. Bureau of Reclamation, Colorado River Basin, Final Report of the Review of the 2007 Interim Guidelines, December 18, 2020, Colorado River Basin | Bureau of Reclamation (usbr.gov) U.S. Bureau of Reclamation, Colorado River Accounting and Water Use Report – Arizona, California and Nevada, Calendar Year 2006 – Revised,
https://www.usbr.gov/lc/region/g4000/4200Rpts/DecreeRpt/2006/2006.pdf U.S. Bureau of Reclamation, Criteria for Coordinated Long Range Operation of Colorado River Reservoirs Pursuant to the Colorado River Basin Project Act of September 30, 1967 (P.L. 90-537), June 8, 1970, http://www.usbr.gov/lc/region/pao/pdfiles/opcriter.pdf U.S. Bureau of Reclamation, Discussion and Comments on Inadvertent Overrun and Payback Policy, https://www.usbr.gov/lc/region/g4000/4200Rpts/DecreeRpt/2019/32.pdf U.S. Bureau of Reclamation, Lower Colorado Region, Colorado River Basin Water Supply and Demand Study, December 2012, https://www.usbr.gov/lc/region/programs/crbstudy/finalreport/index.html U.S. Bureau of Reclamation, Lower Colorado River Region, Annual Operating Plans for Colorado River Reservoirs, http://www.usbr.gov/lc/region/g4000/aop/
U.S. Bureau of Reclamation, News and Multimedia, News Release Archive, Reclamation Announces Preferred Alternative for Colorado River Interim Guidelines for Lower Basin Shortages and Coordinated Operations of Lake Powell and Lake Mead, June 18, 2007, https://www.usbr.gov/newsroom/newsroomold/newsrelease/detail.cfm?RecordID=17341 U.S. Bureau of Reclamation, Post-2026 Operation Guidelines and Strategies for Lake Powell and Lake Mead – Final Environmental Impact Statement, July 2026, Final Environmental Impact Statement | Bureau of Reclamation
U.S. Department of the Interior, Colorado River Water Delivery Agreement: Federal Quantification Settlement Agreement, October 10, 2003, http://www.usbr.gov/lc/region/g4000/crwda/crwda.pdf U.S. Department of the Interior, Record of Decision, Colorado River Water Delivery Agreement, Implementation Agreement, Inadvertent Overrun and Payback Policy, and Related Federal Actions Final Environmental Impact Statement, October 10, 2003, http://www.usbr.gov/lc/region/g4000/crwda/crwda_rod.pdf U.S, Library of Congress, Reports: Bryant v. Yellen, 447 U.S., 352 (1980), https://tile.loc.gov/storageservices/service/ll/usrep/usrep447/usrep447352/usrep447352.pdf Western Regional Climate Center (WRCC) website, http://www.wrcc.dri.edu/cgi-bin/cliMAIN.pl?ca2713

CITY OF EL CENTRO
2025 UWMP

APPENDICES

APPENDIX A
UWMP Checklist

Retail
(x = required) Order 2025 Guidebook Location Water Code Section Summary as Applies to UWMP Subject Relevant Submittal Table 2025 UWMP Location 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 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 Section 1.2
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 2.1x 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 2.1x 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 2.2x 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 2.3x 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 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
x 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 Section 2.4x 3 Chapter 3.0 10631(a) Describe the Supplier service area. System description N/A Sections 3.1 and 3.2x 3.3 Section 3.3 10631(a) Describe the climate of the Supplier’s service area. System description N/A Section 3.3x 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 3.4x 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 3.4x 3.5 Section 3.5 10631(a) Describe the land uses within the service area… include the current and projected land uses within theexisting 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 3.4
x 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 Chapter 4x 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 4-2 and 4-5 Section 4.4x 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 4-2 and 4-5 Section 4.4x 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 4-2 Section 4.3 x 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 4-4 Section 4.3x 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 4-2 Section 4.3 x 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 4-4 Sections 4.3 and 9.1
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 Sections 4.6 and 7.4x 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 Chapter 5
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 N/Ax 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 droughtlasting five years, as well as more frequent and severe periods of drought, including changes in supply due to climate change.

System supplies 7-1 Chapters 6 and 7
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 6.3
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 N/A
x 6.2 Section 6.2.2 10631(b)(4)(B) Describe the groundwater basin. System supplies N/A Section 6.3x 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 N/Ax 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 N/A 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 N/Ax 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 N/A
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 6-1 N/Ax 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 6.10x 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 6.8 x 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 and 6-3 Section 6.6 x 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 6.6 x 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 6.6x 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 6.6

Retail
(x = required) Order 2025 Guidebook Location Water Code Section Summary as Applies to UWMP Subject Relevant Submittal Table 2025 UWMP Location x 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 N/A
x 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 6.6x 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 6.6x 6.2 Section 6.2.6 10631(g) Describe desalinated water project opportunities for long-term supply. System supplies 6-8DS Section 6.7 x 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 droughtlasting five consecutive water years.

System supplies 6-7 Section 6.9
x 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 6.11 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 Chapters 6 and 7x 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, 7-4, and 7-5 Chapter 7 x 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 Chapters 6 and 7 x 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 7-5 Section 7.4x 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 7.4
x 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 Sections 7.3 and 7.4 x 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 7-4 and 7-5 Sections 7.3 and 7.4x 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 Chapter 7
x 8 Chapter 8 10632(a) Provide a water shortage contingency plan (WSCP) with specified elements below. Water shortage contingency  planning N/A Chapter 8 x 8 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 Section 8.1x 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 8.2x 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 8.2x 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 8-1 Section 8.3
x 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 x 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 8.4x 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 8.4x 8.4 Section 8.4 10632(a)(4)(C) Specify locally appropriate operational changes. Water shortage contingency  planning 8-2 Section 8.4x 8.4 Section 8.4 10632(a)(4)(D) Specify additional mandatory prohibitions against specific water use practices that are in addition to State-mandated prohibitions are appropriate to local conditions. Water shortage contingency  planning Table 8-3 Section 8.4x 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 8.4x 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 8.4.10x 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 8.5x 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 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 x 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 8.7x 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 8.7x 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 8.7x 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 8.8x 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 8.8x 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 8.8x 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
x 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 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 x 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 Sections 8.12 and 10.5

Retail
(x = required) Order 2025 Guidebook Location Water Code Section Summary as Applies to UWMP Subject Relevant Submittal Table 2025 UWMP Location x 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 incode.

Demand management measures N/A Chapter 9
N/A 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 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 x 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 x 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 10.2 x 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 Sections 10.2 and 10.3 and  Appendix D x 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 x 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 and Appendix Dx 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 10.4x 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 10.4x 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 10.4x 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 10.6x 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 x 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 Sections 8.12 and 10.5 x 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 N/A

APPENDIX B
Standardized Tables

CA1310004 City of El Centro 10,149 7,970
10,149 7,970
Submittal Table 2-1 Retail: Public Water Systems
Add additional rows as needed
NOTES: Volume of water is in AF
Volume of Water
Supplied 2025 (AF)
DWR NOTES:

Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Submittal Table 2-3. This table identifies the unit of measure selected in Submittal Table 2-3.

Total
Public Water System
Number
Public Water System
Name
Number of Municipal
Connections 2025

Select
One
Name of Regional Alliance or
RUWMP (Drop Down List)
NOTES:

Submittal Table 2-2: Plan Identification
Type of Plan
Individual UWMP
If Water Supplier is also a member of a SB X7-7
Regional Alliance, select name from the drop-down.

Regional Urban Water Management Plan (RUWMP)
If Supplier selected RUWMP, select name from the
drop-down.

Supplier is a wholesale supplier
Supplier is a retail supplier
UWMP Tables are in calendar years
UWMP Tables are in fiscal years
Unit AF
Submittal Table 2-3: Supplier Identification
Type of Supplier (select one or both)
Fiscal or Calendar Year (select one)
If using fiscal years provide month and date that the fiscal year begins (mm/dd)
Units of measure used in UWMP
(Select from the drop down list).

DWR NOTES:

Units of measure (AF, CCF, MG) must remain consistent
throughout the UWMP as reported in Submittal Table 2-3.

NOTES:

Submittal Table 2-4 Retail: Water Supplier Information Exchange Water Code Section 10631(h)
The retail Supplier has informed the following wholesale supplier(s) of projected water use.

Wholesale Water Supplier Name
Add additional rows as needed
Imperial Irrigation District
NOTES:

2025 2030 2035 2040 2045 2050(opt)
46,029 46,350 47,600 48,700 49,800 50,900
Submittal Table 3-1 Retail: Population - Current and Projected Water Code Section 10631(a)
Population
Served
NOTES: Population projections provided to the City of El Centro by the Southern California Association of Government’s (SCAG)

Use Type
Drop down list
May select each use multiple times
These are the only use types that will be recognized by the WUEdata online submittal tool
Potable or Non-Potable
(OPTIONAL)
Drop down list
Volume (AF)
Single Family Potable 3,464Multi-Family Potable 1,021Commercial Potable 854Institutional/Governmental Potable 457Industrial Potable 1Landscape Includes Park Lands Potable 677Other (optional) Firewater Potable 7Distribution System Water Loss Potable 1,489 7970
0 Total 7,970
Submittal Table 4-1 Retail: Total Uses for Potable and Non-Potable Water — ActualWater Code Section 10631(d)(1) NOTES:DWR NOTES: Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Submittal Table 2-3. This table identifies the unit of measure selected in Submittal Table 2-3. 2025 Actual Water Use
Add additional rows as needed
Subtotal Potable
Subtotal Non-Potable
Additional Description
(as needed)

Use Type
Drop down list
May select each use multiple times
These are the only Use Types that will be recognized
by the WUEdata online submittal tool
Potable or Non-Potable
(OPTIONAL)
Drop down list
2030 (AF) 2035 (AF) 2040 (AF) 2045 (AF) 2050 opt (AF)
Single Family Potable 3,480 3,536 3,592 3,744 3,896Multi-Family Potable 1,026 1,042 1,059 1,104 1,148Commercial Potable 860 883 904 924 944Institutional/Governmental Potable 460 473 484 494 507Industrial Potable 1 1 1 1 1Landscape Includes Parklands Potable 682 700 716 732 749Other (optional) Firewater Potable 0 0 0 0 0Distribution System Water Loss Potable 1,007 1,027 1,045 1,083 1,121 7,516 7,662 7,801 8,082 8,366
0 0 0 0 0
7,516 7,662 7,801 8,082 8,366
Add additional rows as needed.

Submittal Table 4-2 Retail: Total Uses for Potable, and Non-Potable Water — Projected Water Code Section 10631(d)(1)
Projected Water Use
(Report To the Extent that Records are Available)
Additional Description
(as needed)
NOTES:

Total
DWR NOTES: Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Submittal Table 2-3. This table identifies the unit of measure selected in Submittal Table 2-3.

Subtotal Non-Potable
Subtotal Potable

Are Future Water Savings Included in Projections?
Drop down list (y/n) Yes
If "Yes" to above, state the section or page number, in the cell to the right, where citations of the codes, ordinances, or otherwise are utilized in demand projections are found.

Optional Suppliers may complete Optional Submittal Table 4-4 R to quantify the expected savings.

Section 4.3 and
Chapter 9
Are Lower Income Residential Demands Included In Projections? Drop down list (y/n) Yes
Optional If the method for accounting Lower Income Residential Demands has been included, provide page number where this accounting can be found.

Section 4.5 (page
4-10)
Submittal Table 4-3 Retail: Inclusion in Water Use Projections Water Code Section 10631 (a), 10631 (d)(4)(A), and 10631 (d)(4)(B) NOTES:

DWR NOTES: Additional guidance is provided in Appendix K.

2030 (AF) 2035 (AF) 2040 (AF) 2045 (AF) 2050 opt (AF)
NOTES:

Optional Submittal Table 4-4 Retail: Passive Water Savings ProjectionsWater Code Section 10631(d)(4)(A) Passive savings
DWR NOTES: Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Submittal Table 2-3. This table identifies the unit of measure selected in Submittal Table 2-3.

Description
(Codes, Standards, Ordinances, or Plans)

Public Water System ID # Reported
in Table 2-1 R Reporting Period Submitted to DWR Water Loss Audit Program (yes/no) 2020 Yes
2021 Yes
2022 Yes
2023 Yes
2024 Yes
Submittal Table 4-5 Retail: Water Loss Audit Reporting
Water Code Section 10631(d)(3)(A)
CA1310004
NOTES: Water Loss Audit Reports may be found on the WUEdata Portal at the following link: https://wuedata.water.ca.gov/awwa_plans Report submittal status for all five years for each Public Water System as available.

Add rows as needed

2028 Real Water Loss
Standard per Unit per
day
Units for Real
Water Loss
Drop down list
Number of Units
(Connections or Miles
corresponding with
units selected)
Volume of Total Real
Loss
(from AWWA Water
Loss Audit)
(AF)
2028 Apparent Water
Loss Standard per
Unit per Day
Units for
Apparent Water
Loss
Number of
Connections
Volume of Total
Apparent Loss
(from AWWA Water
Loss Audit)
(AF)
CA1310004 Yes 14.9
Gallons per
Service
Connection per
Day (GPSCD)
10056 1101 97.7 9.1
Gallons per
Service
Connection per
Day (GPSCD)
10056 239 21.2
Gallons per
Service
Connection per
Day (GPSCD)
Gallons per
Service
Connection per
Day (GPSCD)
Submittal Table 4-6 Retail: Progress Towards 2028 Water Loss Standard Water Code Section 10631(d)(3)(C) NOTES: Data from 2024 Water Loss Audit Apparent Water Loss
Did the Water Board Calculate a
Water Loss Standard for this
Public Water System? (y/n)
If no, Supplier will not complete
this row.

Real Water Loss
Water Board's Calculated Water Loss Standards
DWR NOTES: Units of measure (AF, CCF, MG) for Water Loss MUST remain consistent with units reported in Submittal Table 2-3. The units reported in Submittal Table 2-3 are used in this table's calculations.

Public Water
System ID #
Reported in
Submittal Table 2-1
R
Add additional rows as needed.

Most Recent AWWA Water Loss Audit
Real Water
Loss Per Unit
per Day
Most Recent AWWA Water Loss Audit
Apparent Water
Loss Per Unit per
Day
State Water Board Standard State Water Board Standard

Actual 2025 GPCD
(From SB X7-7
Compliance Form)
Did Supplier meet the
2020 Target in 2025?
No Individual Target 198 148 Yes NA
Submittal Table 5-1 Retail: SB X7-7 2020 Target ProgressWater Code Section 10608.40NOTES:

Did Supplier
Achieve Targeted
Reduction for
2020?
Actual 2020 GPCD2020 Target
Regional Alliance
Target or
Individual
Target?
Drop down list
DWR NOTES: Suppliers calculating a 2025 GPCD will need to complete and submit SB X 7-7 Compliance Tables to verify the use of SB X7-7 Methodologies. Suppliers that were part of a merger or consolidation since 2020 see Chapter 5 and Appendix P for guidance.

NA=Not Applicable
Check the box if the Supplier was not an Urban Water Supplier during or before the 2020 UWMP reporting cycle. Proceed to the next table.

Only for suppliers that did not meet the
Target in 2020
See DWR NOTES below.

Was Supplier part of a
merger or
consolidation since
2020?

Groundwater Type
Drop Down List
May use each category
multiple times
Potable or
Non-Potable
(OPTIONAL)
Drop down list
Location or Basin Name 2021 (AF) 2022 (AF) 2023 (AF) 2024 (AF) 2025 (AF) 0 0 0 0 0
Add additional rows as needed
Submittal Table 6-1 Retail: Groundwater Volume PumpedWater Code Section 10631(4) and 10631(4)(c) DWR NOTES: Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Submittal Table 2-3. This table identifies the unit of measure selected in Submittal Table 2-3.NOTES
Total
Check the box if the Supplier does not pump groundwater. Proceed to the next table. Check the box if all or part of the groundwater described below is desalinated. (OPTIONAL)

Name of Wastewater
Collection Agency
Wastewater
Volume Metered
or Estimated?

OPTIONAL
Drop Down List
Volume of Wastewater
Collected from UWMP
Service Area 2025 (AF)
Name of Wastewater
Treatment Plant (WWTP) and
Place ID Number
Drop down list
Is WWTP Located
Within UWMP
Area?
Drop Down List
City of El Centro Metered 3,994 El Centro City WWTP, Place ID 222407 Yes 3,994
Check the box if there is no wastewater collection system. Proceed to the next table.

NOTES:

Submittal Table 6-2 Retail: Wastewater Collected Within Service AreaWater Code Section 10633(a) Percentage of 2025 service area population served by wastewater collection system (OPTIONAL)Percentage of 2025 service area served by wastewater collection system (OPTIONAL) DWR NOTES: Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Submittal Table 2-3. This table identifies the unit of measure selected in Submittal Table 2-3.Additional Guidance: See Appendix M, Section M.21 for detailed guidance on this table.

Wastewater Collection Recipient of Collected Wastewater Total Wastewater Received from UWMP
Service Area in 2025:

Add additional rows as needed

Treatment Level
Drop down list
Volume
(AF)
Treatment Level
Drop down list
Volume
(AF)
Treatment Level
Drop down list
Volume
(AF)
Treatment Level
Drop down list
Volume
(AF)
Treatment Level
Drop down list
Volume
(AF)
Name of other
entity
El Centro City WWTP,
Place ID 222407 No 3994 3,994 Secondary, Disinfected - 23 3,994 3,994 3,994 0 0 3,994 0 0
Submittal Table 6-3 Retail: Wastewater Treatment and Outcomes Within UWMP Service AreaWater Code Section 10633(b)DWR NOTES:Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Submittal Table 2-3. This table identifies the unit of measure selected in Submittal Table 2-3.

IPR: Indirect Potable Reuse would have the treatment level of its end use requirement in the Level of Treatment drop-down.

Additional Guidance: See Appendix M, Section M.21 for detailed guidance on this table.

Water Recycled Outside
of UWMP Service Area
(enter data as applicable)
Effluent Discharge that is not a
Permitted Recycled Water Use
(enter data as applicable)
Required Discharge for
Instream Flow
(enter data as applicable)
Delivered to Another Entity for Additional
Treatment
(enter data as applicable)
Add additional rows as needed
2025 Outcomes of Treated Wastewater
Check the box if no wastewater is treated or disposed of within the UWMP service area. Proceed to the next table.

Does This Plant
Treat
Wastewater
Generated
Outside the
UWMP Service
Area?
(OPTIONAL)
Drop down list
Wastewater Treatment
Plant Name and Place
ID Number
Drop down list
Total 2025
Volume of
Water
Treated
(AF)
NOTES:

Total
2025 Volume of
Wastewater
Received from
UWMP Service
Area
(As Reported in
Submittal Table
6-2 R) (AF)
Water Recycled Within
UWMP Service Area
(enter data as applicable)

Volume Narrative page number (OPTIONAL)

0 0 0 0 0 0 00 0 0 0 0 0 0
Total 0 0 0 0 0 0 0 0
Use Type
Drop down list
Potable or Non-Potable
(after treatment if treated)
(OPTIONAL)
Drop down list
Additional Information
(as needed)
Add additional rows as neededDWR NOTES: Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Submittal Table 2-3. This table identifies the unit of measure selected in Submittal Table 2-3. Additional Guidance: See Appendix M, Section M.21 for detailed guidance on this table.

Potential recycled water use: a description of the feasibility of these uses must be included in the narrative.

Multiple Producers: If you have multiple recycled water producers, submit a separate table for each.

NOTES:

AF) 2050 (AF)2025 (AF) 2030 (AF) 2035 (AF) 2040 (AF) 2045 ( Subtotal Potable
Subtotal Non-Potable
Check box if recycled water is not used and is not planned for use within the service area of the supplier. The supplier will only complete the column on "Potential Recycled Water Use" and submit an accompanying narrative on the feasibility of that potential recycled water use.

Submittal Table 6-4 Retail: Recycled Water Direct Beneficial Uses Within Service AreaWater Code Section 10633 (c),(d),(e) Potential Recycled Water Use
Name(s) of Facility/ies Producing (Treating) the Recycled Water (OPTIONAL) :Name of Supplier Operating the Recycled Water Distribution System (OPTIONAL) :Volume of Supplemental Water Added in 2025 (OPTIONAL) :Source of 2025 Supplemental Water (OPTIONAL) :

2020 Projection
for 2025 (AF)
2025 Actual
Use (AF)
0 0
NOTES:

Total
DWR NOTES:

Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Submittal Table 2-3. This table identifies the unit of measure reported in Submittal Table 2-3 Additional Guidance: See Appendix M, Section M.21 for detailed guidance on this table.

Use Type
Drop Down list
Submittal Table 6-5 Retail: 2020 UWMP Recycled Water Use Projection Compared to 2025 Actual
Water Code Section 10633(e)
Check the box if recycled water was not used in 2025 nor previously projected for use in 2020.

Proceed to the next table.

Add additional rows as needed

Name of Action Description Expected Increase in Recycled Water Use (AF) 00 Total (AF)
DWR NOTES: Units of measure (AF, CCF, MG) MUST remain consistent with units reported in Submittal Table 2-3. This table identifies the unit of measure selected in Submittal Table 2-3.The unit conversion to Acre Feet addresses the Water Code's requirement that this value be provided in acre-feet.

NOTES:

Submittal Table 6-6 Retail: Methods to Encourage Future Recycled Water UseWater Code Section 10633(f) Check the box if the Supplier does not plan to expand recycled water use in the future. Supplier will not complete the table below but will provide narrative explanation. Provide page location of narrative in the UWMP Add additional rows as needed
Unit Conversion to AF
Planned Implementation Year

Drop Down
List
(yes/no)
If Yes, Supplier Name
Planned for Use in
Year Type
Drop Down List
NOTES:

Submittal Table 6-7 Retail: Expected Future Water Supply Projects or ProgramsWater Code Section 10631(f) DWR NOTES: Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Submittal Table 2-3. This table identifies the unit of measure reported in Submittal Table 2-3.

Check the box if some or all of the supplier's future water supply projects or programs are not compatible with this table and are described in a narrative format. Check the box if there are no expected future water supply projects or programs that provide a quantifiable increase to the agency's water supply.Proceed to the next table.

Planned
Implementation
Year
Add additional rows as needed
Joint Project with other suppliers? Expected
Increase in
Water Supply
to Supplier
(This may be a
range) (AF)
Provide page location of narrative in the UWMP
Name of Future Projects
or Programs
Additional Description
(as needed)
Potable or Non-Potable
(after treatment if treated)
(OPTIONAL)
Drop Down list

Water Supply
Drop down list
May use each category multiple times.

These are the only water supply
categories that will be recognized by the
WUEdata online submittal tool
Potable or Non-Potable
(after treatment if treated)
(OPTIONAL)
Drop Down list
Actual Volume
(AF)
Total Entitlement
(OPTIONAL)
See 'DWR Notes' below
(AF)
Purchased or Imported Water Imperial Irrigation District - Raw Colorado River Water Potable 7,970 7,970 0
0 0
7,970 0
Submittal Table 6-8 Retail: Water Supplies — ActualWater Code Section 10631(b) 2025
NOTES: IID supplies non-potable water that is treated at the City's WTP. Volume of supply shown is water supplied into distribution from the City's WTP.DWR NOTES: Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Submittal Table 2-3. This table identifies the unit of measure selected in Submittal Table 2-3.Total Entitlement: e.g. Water Right, Groundwater Allocation, Contracted Amount.

Add additional rows as needed
Total
Subtotal Potable
Subtotal Non-Potable
Additional Description
(as needed)

2021 (AF) 2022 (AF) 2023 (AF) 2024 (AF) 2025 (AF) Total 0 0 0 0 0 NOTES:

Optional Table 6-8DS: Source Water Desalination by Urban Water Supplier Check the box if the Supplier does not reduce salinity in either groundwater or surface water prior to distribution.

Volume of Water Desalinated
DWR NOTES: Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Submital Table 2-3. This table identifies the units of measure reported in Submittal Table 2-3.

Add additional rows as needed
Desalination Facility
Drop Down list
Plant
Capacity
Intake Type
Drop down list
Source Water Type
Drop down list
Influent
TDS
Brine Discharge
Drop down list
Name(s) of Agencies
that Receive this Water

Water Supply
Reasonably
Available
Volume (AF)
Total Entitlement
(OPTIONAL)
See 'DWR Notes'
below (AF)
Reasonably
Available
Volume (AF)
Total Entitlement
(OPTIONAL)
See 'DWR Notes'
below (AF)
Reasonably
Available
Volume (AF)
Total Entitlement
(OPTIONAL)
See 'DWR Notes'
below (AF)
Reasonably
Available
Volume (AF)
Total Entitlement
(OPTIONAL)
See 'DWR Notes'
below (AF)
Reasonably
Available
Volume (AF)
Total Entitlement
(OPTIONAL)
See 'DWR Notes'
below (AF)
Purchased or Imported Water
Imperial
Irrigation
District
Potable 7,516 7,662 7,801 8,082 8,366
7,516 0 7,662 0 7,801 0 8,082 0 8,366 0
0 0 0 0 0 0 0 0 0 0
7,516 0 7,662 0 7,801 0 8,082 0 8,366 0
Submittal Table 6-9 Retail: Water Supplies — ProjectedWater Code Section 10631 (b) Projected Water Supply (Report to the Extent Practicable) Drop down list
May use each category multiple
times. These are the only water
supply categories that will be
recognized by the WUEdata online
submittal tool
Additional
Detail on
Water Supply
Potable or Non-Potable
(after treatment if treated)
(OPTIONAL)
Drop Down list
2050 (opt)
Add additional rows as needed
Total
NOTES: IID has indicated full reliability to meet demands. Imported supply is set equal to projected demand given 100% reliability from IID. Additional supply is avaiable, as needed, to meet City demands. 2030 2035 2040 2045
Subtotal Non-Potable
Subtotal Potable
DWR NOTES: Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Submittal Table 2-3. Total Entitlement: e.g. Water Right, Groundwater Allocation, Contracted Amount.

Units for
Water
Volume
Extract and
Divert
Place into
Storage Conveyance Treatment Distribution Total Utility See DWR NOTES Hydropower Net Utility 0 N/A 0 0N/A 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.00
Optional Submittal Table O-1A: Recommended Energy Reporting - SINGLE DELIVERY PRODUCT - WATER SUPPLY PROCESS APPROACH Water Delivery Product
drop down list
(If delivering more than one type of product recommend using Table O1C) Only for Water Delivery Products Under the Urban Water Supplier's Operational Control Start Date of Reporting Period
Water Management Process Non-Consequential Hydropower (if applicable) End Date of Reporting Period Is upstream embedded energy included in the values reported? Volume of Water Entering Process
Energy Consumed (kWh)
Energy Intensity (kWh/vol. converted to MG)
DWR NOTES: Total Utility:The volume of water entered in the “Total Utility” column should equal the volume of water entering the distribution system (excluding recycled water); in most cases, this is the total volume calculated in UWMP Table 4-1: 2025 Actual Total Uses for Potable and Non-Potable Water. Note if recycled water is included in your Submittal Table 4-1, you must exclude it from your volume in this table.

Water Delivery Product
drop down list
(If delivering more than one type of product recommend using Table O-1C)
Retail Potable
Deliveries
Start Date of Reporting Period 1/1/2025
End Date of Reporting Period 12/31/2025
Is upstream embedded energy in the values reported? No
Units of Measure for Water AF Total Utility
See DWR NOTES Hydropower Net Utility
7,970 7,970 9,047 9,047
3 - 3
Optional Submittal Table O-1B: Recommended Energy Reporting - SINGLE DELIVERY PRODUCT - TOTAL UTILITY APPROACH Only for Water Delivery Products Under the Urban Water Supplier's Operational Control Sum of All Water Management
Processes Non-Consequential Hydropower
DWR NOTES: Total Utility:The volume of water entered in the “Total Utility” column should equal the volume of water entering the distribution system (excluding recycled water); in most cases, this is the total volume calculated in UWMP Table 4-1: 2025 Actual Total Uses for Potable and Non-Potable Water. Note if recycled water is included in your Submittal Table 4-1, you must exclude it from your volume in this table.

Volume of Water Entering Process
Energy Consumed (kWh)
Energy Intensity (kWh/vol. converted to MG)

Start Date of Reporting Period
End Date of Reporting Period
Is upstream embedded energy in the values reported? Units of Measure for Water Extract and Divert Place into Storage Conveyance Treatment Distribution Total Utility See DWR NOTES Hydropower Net Utility N/A
0% 0% 0% 0% 0% N/A 0% N/A
0 0

0.0 0.0 0.0 0.0 0.0 N/A 0.0 N/A
Total Percentage [must equal 100%]
Total Energy Consumed by Each Process for All Product Types (kWh) Energy Intensity (kWh/vol. converted to MG)
DWR NOTES: The volume of water entered in the “Total Utility” column should equal the volume of water entering the distribution system (excluding recycled water); in most cases, this is the total volume calculated in UWMP Table 4-1: 2025 Actual Total Uses for Potable and Non-Potable Water. Note if recycled water is included in your Submittal Table 4-1, you must exclude it from your volume in this table.

Retail Potable Deliveries (%)
Enter in Column C
of table below
Retail Non-Potable Deliveries (%)
Wholesale Potable Deliveries(%)
Wholesale Non-Potable Deliveries (%)
Agricultural Deliveries (%)
Environmental Deliveries (%)
Other (%)
Total Volume of Water Entering Each Process for All Product Types Optional Submittal Table O-1C: Recommended Energy Reporting - MULTIPLE WATER DELIVERY PRODUCTS - WATER PROCESS APPROACH Only for Water Delivery Products Under the Urban Water Supplier's Operational Control Water Management Processes Non-Consequential Hydropower (if applicable)

Start Date of Reporting Period
End Date of Reporting Period
Is upstream embedded energy in the values reported?
Units of Measure for Water Collection /
Conveyance
Treatment Discharge / Distribution Total
00 0.0 0.0 0.0 0.0
00 0.0 0.0 0.0 0.0
Quantity of Self-Generated Renewable Energy related to recycled water and wastewater operations kWh
Data Quality (drop down)Data Quality Narrative:Narrative:

Optional Submittal Table O-2: Recommended Energy Reporting - WASTEWATER AND RECYCLED WATER Only for Water Delivery Products Under the Urban Water
Supplier's Operational Control
Water Management Process
NOTES:

Volume of Wastewater Entering Process (volume units selected above) Wastewater Energy Consumed (kWh)
Volume of Recycled Water Entering Process (volume units selected above) Recycled Water Energy Consumed (kWh)
Wastewater Energy Intensity (kWh/volume converted to MG) Recycled Water Energy Intensity (kWh/volume converted to MG)

% of Average Supply
Average Year 2008 100%
Single-Dry Year 2006 109%
Consecutive Dry Years 1st Year 2000 105%
Consecutive Dry Years 2nd Year 2001 103%
Consecutive Dry Years 3rd Year 2002 105%
Consecutive Dry Years 4th Year 2003 103%
Consecutive Dry Years 5th Year 2004 105%
Year Type
Base Year
If not using a calendar
year, type in the last
year of the fiscal,
water year, or range
of years, for example,
water year 2024-
2025, use 2025
Optional Submittal Table 7-1 Retail: Basis of Water Year Data (Reliability Assessment) Available Supplies if
Year Type Repeats
Check the box if quantification of available supplies is not compatible with this table and is provided elsewhere in the UWMP.

Location: [insert location from UWMP]
Volume Available (AF)
Quantification of available supplies is provided in this table as either volume only, percent only, or both.

NOTES: The City receives its water supply from IID with no restrictions on the amount needed. As such, dry years do not impact the City's supply. Dry year supply is set equal to dry year demand based on historical use.

DWR NOTES: Supplier may use multiple versions of Submittal Table 7-1 R if different water sources have different base years and the supplier chooses to report the base years for each water source separately. If a Supplier uses multiple versions of Submittal Table 7-1 R, in the "Note" section of each submittal table, state that multiple versions of Submittal Table 7-1 R are being used and identify the particular water source that is being reported in each submittal table.

Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Submittal Table 2-3. This table reports the units of measure reported in Submittal Table 2-3.

2030 (AF) 2035 (AF) 2040 (AF) 2045 (AF) 2050 (AF)
Supply totals
(autofill from Submittal Table 6-
9 R)
7,516 7,662 7,801 8,082 8,366
Use totals
(autofill from Submittal Table 4-
2 R)
7,516 7,662 7,801 8,082 8,366
Surplus/(shortfall) 0 0 0 0 0
WSCP - supply augmentation
benefit
WSCP - use reduction savings
benefit
Revised Surplus/(shortfall)
OPTIONAL Planned WSCP Actions
Submittal Table 7-2 Retail: Normal Year Supply and Use Comparison Water Code Section 10635 (a)
NOTES:

DWR NOTES : Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Submittal Table 2-3.

Supply totals 8,193 8,351 8,504 8,809 9,119
Use totals 8,193 8,351 8,504 8,809 9,119
Surplus/(shortfall) 0 0 0 0 0
WSCP - supply
augmentation benefit
WSCP - use reduction
savings benefit
Revised Surplus/(shortfall)
2050 (AF)
DWR NOTES : Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Submittal Table 2-3.

NOTES
Submittal Table 7-3 Retail: Single Dry Year Supply and Use Comparison Water Code Section 10635(a)
OPTIONAL Planned WSCP Actions
2030 (AF) 2035 (AF) 2040 (AF) 2045 (AF)

2030 (AF) 2035 (AF) 2040 (AF) 2045 (AF) 2050 (AF)
Supply totals 7,892 8,045 8,191 8,486 8,784
Use totals 7,892 8,045 8,191 8,486 8,784
Surplus/(shortfall) 0 0 0 0 0
WSCP - supply augmentation benefit
WSCP - use reduction savings benefit
Revised Surplus/(shortfall)
Supply totals 7,742 7,892 8,035 8,324 8,617
Use totals 7,742 7,892 8,035 8,324 8,617
Surplus/(shortfall) 0 0 0 0 0
WSCP - supply augmentation benefit
WSCP - use reduction savings benefit
Revised Surplus/(shortfall)
Supply totals 7,892 8,045 8,191 8,486 8,784
Use totals 7,892 8,045 8,191 8,486 8,784
Surplus/(shortfall) 0 0 0 0 0
WSCP - supply augmentation benefit
WSCP - use reduction savings benefit
Revised Surplus/(shortfall)
Supply totals 7,742 7,892 8,035 8,324 8,617
Use totals 7,742 7,892 8,035 8,324 8,617
Surplus/(shortfall) 0 0 0 0 0
WSCP - supply augmentation benefit
WSCP - use reduction savings benefit
Revised Surplus/(shortfall)
Supply totals 7,892 8,045 8,191 8,486 8,784
Use totals 7,892 8,045 8,191 8,486 8,784
Surplus/(shortfall) 0 0 0 0 0
WSCP - supply augmentation benefit
WSCP - use reduction savings benefit
Revised Surplus/(shortfall)
Submittal Table 7-4 Retail: Multiple Dry Years Supply and Use Comparison Water Code Section 10635(a)
OPTIONAL Planned WSCP Actions
Third year
Fifth year
DWR NOTES: Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Submittal Table 2-3.

OPTIONAL Planned WSCP Actions
OPTIONAL Planned WSCP Actions
Fourth year OPTIONAL Planned WSCP Actions
NOTES:

First year
Second year OPTIONAL WSCP Actions

2026 Total
Total Water Use (AF) 8,273
Total Supplies (AF) 8,273
Surplus/Shortfall w/o WSCP Action 0
WSCP - supply augmentation benefit (AF)
WSCP - use reduction savings benefit (AF)
Revised Surplus/(shortfall)
2027 Total
Total Water Use (AF) 8,022
Total Supplies (AF) 8,022
Surplus/Shortfall w/o WSCP Action 0
WSCP - supply augmentation benefit (AF)
WSCP - use reduction savings benefit (AF)
Revised Surplus/(shortfall)
2028 Total
Total Water Use (AF) 8,083
Total Supplies (AF) 8,083
Surplus/Shortfall w/o WSCP Action 0
WSCP - supply augmentation benefit (AF)
WSCP - use reduction savings benefit (AF)
Revised Surplus/(shortfall)
2029 Total
Total Water Use (AF) 7,835
Total Supplies (AF) 7,835
Surplus/Shortfall w/o WSCP Action 0
WSCP - supply augmentation benefit (AF)
WSCP - use reduction savings benefit (AF)
Revised Surplus/(shortfall)
2030 Total
Total Water Use (AF) 7,892
Total Supplies (AF) 7,892
Surplus/Shortfall w/o WSCP Action 0
WSCP - supply augmentation benefit (AF)
WSCP - use reduction savings benefit (AF)
Revised Surplus/(shortfall)
NOTES:

DWR NOTES: Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Submittal Table 2-3.

Submittal Table 7-5 Retail: Five-Year Drought Risk Assessment Water Code Section 10635(b)(3)
OPTIONAL Planned WSCP Actions (use reduction and supply augmentation)
OPTIONAL Planned WSCP Actions (use reduction and supply augmentation)
OPTIONAL Planned WSCP Actions (use reduction and supply augmentation)
OPTIONAL Planned WSCP Actions (use reduction and supply augmentation)
OPTIONAL Planned WSCP Actions (use reduction and supply augmentation)

Standard
Shortage
Levels
Percent Shortage
Range
Suppliers
Shortage Levels
Percent Shortage
Range
1 Up to 10% 1 Up to 10%
2 Up to 20% 2 10 - 20%
3 Up to 30% 3 20 - 30%
4 Up to 40% 4 30 - 50%
5 Up to 50% 4 30 - 50%
6 >50% 5
Greater than or equal
to 50%
Submittal Table 8-1: Cross-reference for Standard vs Supplier Shortage Levels
Water Code Section 10632(a)(3)(B)
Check the box if the Supplier uses the Standard six
levels of water shortage.

Proceed to the next table.

NOTES:

Yes
Volume or
Percentage
Drop down
Shortage Gap
Reduction Value
(May be a range) (AF)
1 Expand Public Information Campaign Percentage 3 2 Improve Customer Billing Percentage 1 2 Implement or Modify Drought Rate Structure or Surcharge Percentage 1 3 Implement or Modify Drought Rate Structure or Surcharge Percentage 6 Includes 25% rate increase 4 Implement or Modify Drought Rate Structure or Surcharge Percentage 2 Includes 50% rate increase 5 Implement or Modify Drought Rate Structure or Surcharge Percentage 5 Includes 100% rate increase Submittal Table 8-2 Retail: Supply Augmentation and Other ActionsWater Code Section 10632(a)(4)(A),(C) and (E) Add additional rows as needed
NOTES:

Is the Supplier completing this table using the standard six levels? (yes/no) How much is this going to reduce the
shortage gap?
DWR NOTES: Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Submittal Table 2-3.

Shortage
Level
Supply Augmentation Methods and
Other Actions by Water Supplier
Drop down list
These are the only categories that will be
accepted by the WUEdata online submittal tool
Additional Explanation or Reference
(OPTIONAL)

Yes
Volume or Percentage
Drop down
Shortage Gap
Reduction Value
(May be a range) (AF)
1 Landscape - Restrict or prohibit runoff from landscape irrigation Percentage 1 Yes 1 CII - Lodging establishment must offer opt out of linen service Percentage 1 Yes 1 CII - Restaurants may only serve water
upon request Percentage 1 Yes
1 Water Features - Restrict water use for
decorative water features, such as
fountains
Percentage 1 Must use recycled or recirculated water. Yes 1 Other - Customers must repair leaks,
breaks, and malfunctions in a timely
manner
Percentage 2 Yes
1 Other - Require automatic shut of hoses Percentage 1 Yes 1 Other - Prohibit use of potable water for washing hard surfaces Percentage 2 Yes 1 Expand Public Info Campaign Percentage 3 Yes2 Landscape - Limit landscape irrigation to specific times Percentage 1 Watering only allowed <10 a.m. or >6 p.m. Yes 2 Landscape - Limit landscape irrigation to specific days Percentage 1 3 days/wd from June 1 to September 15; 2 days/wk the rest of the year. Yes 2 Other - Prohibit use of potable water for construction and dust control Percentage 1 Yes 2 Other Percentage 1 Implement water allocations based on average 2013 usage minus conservation savings Yes2 Improve Customer Billing Percentage 1 Yes2 Provide Rebates on Plumbing Fixtures and Devices Percentage 1 Yes 2 Provide Rebates for Landscape Irrigation Efficiency Percentage 1 Yes 2 Provide Rebates for Turf Replacement Percentage 1 Yes2 Decrease Line Flushing Percentage 1 Yes2 Increase Water Waste Patrols Percentage 1 Yes2 Implement or Modify Drought Rate Structure or Surcharge Percentage 1 Yes 3 Other water feature or swimming pool
restriction Percentage 2 Yes
3 Other - Prohibit vehicle washing except
at facilities using recycled or
recirculating water
Percentage 2 Yes
3 Implement or Modify Drought Rate Structure or Surcharge Percentage 6 25% rate increase Yes 4 Landscape - Prohibit all landscape
irrigation Percentage 5 Yes
4 Other Percentage 1 No issuance of new construction meters Yes4 Moratorium or Net Zero Demand
Increase on New Connections Percentage 2 50% rate increase and penalties for excessive use Yes 4 Other Percentage 2 50% Rate Increase and Higher Stage 4 penalties for excessive use Yes 5 Other Percentage 5 Higher Stage 5 penalties for excessive use Yes5 Other Percentage 5 Revise Water Allocations and Rate Structure as Needed Including 100% rate increase Yes Is the Supplier completing this table using the standard six levels? (yes/no) Submittal Table 8-3 Retail: Demand Reduction ActionsWater Code Section 10632(a)(4)(B),(D), and (E) Add additional rows as needed
How much is this going to reduce the shortage
gap?
Shortage
Level
Demand Reduction Actions
Drop down list
These are the only categories that will be
accepted by the WUEdata online submittal
tool. Select those that apply.

Additional Explanation or Reference
(OPTIONAL)
NOTES:

Penalty, Charge, or
Other
Enforcement?
For Retail Suppliers Only
Drop Down List
DWR NOTES: Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Submittal Table 2-3.