Napa City Council
June 16, 2026

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(D) Consider different levels of per capita water use according to plant water needs in different regions.
(E) Consider different levels of commercial, industrial, and institutional water use in different regions of the state.
(F) Avoid placing an undue hardship on communities that have implemented conservation measures or taken actions to keep per capita water use low.
(c) If the department adopts a regulation pursuant to paragraph (4) of subdivision (b) that results in a requirement that an urban retail water supplier achieve a reduction in daily per capita water use that is greater than 20 percent by December 31, 2020, an urban retail water supplier that adopted the method described in paragraph (4) of subdivision (b) may limit its urban water use target to a reduction of not more than 20 percent by December 31, 2020, by adopting the method described in paragraph (1) of subdivision (b). (d) The department shall update the method described in paragraph (4) of subdivision (b) and report to the Legislature by December 31, 2014. An urban retail water supplier that adopted the method described in paragraph (4) of subdivision (b) may adopt a new urban daily per capita water use target pursuant to this updated method.
(e) An urban retail water supplier shall include in its urban water management plan due in 2010 pursuant to Part 2.6 (commencing with Section 10610) the baseline daily per capita water use, urban water use target, interim urban water use target, and compliance daily per capita water use, along with the bases for determining those estimates, including references to supporting data.
(f) When calculating per capita values for the purposes of this chapter, an urban retail water supplier shall determine population using federal, state, and local population reports and projections.
(g) An urban retail water supplier may update its 2020 urban water use target in its 2015 urban water management plan required pursuant to Part 2.6 (commencing with Section 10610).
(h)
(1) The department, through a public process and in consultation with the California Urban Water Conservation Council, shall develop technical methodologies and criteria for the consistent implementation of this part, including, but not limited to, both of the following:
(A) Methodologies for calculating base daily per capita water use, baseline commercial, industrial, and institutional water use, compliance daily per capita water use, gross water use, service area ATTACHMENT 3

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population, indoor residential water use, and landscaped area water use.
(B) Criteria for adjustments pursuant to subdivisions (d) and (e) of Section 10608.24.
(2) The department shall post the methodologies and criteria developed pursuant to this subdivision on its internet website, and make written copies available, by October 1, 2010. An urban retail water supplier shall use the methods developed by the department in compliance with this part.
(h)
(1) The department shall adopt regulations for implementation of the provisions relating to process water in accordance with Section 10608.12, subdivision (e) of Section 10608.24, and subdivision (d) of Section 10608.26.
(2) The initial adoption of a regulation authorized by this subdivision is deemed to address an emergency, for purposes of Sections 11346.1 and 11349.6 of the Government Code, and the department is hereby exempted for that purpose from the requirements of subdivision (b) of Section 11346.1 of the Government Code. After the initial adoption of an emergency regulation pursuant to this subdivision, the department shall not request approval from the Office of Administrative Law to readopt the regulation as an emergency regulation pursuant to Section 11346.1 of the Government Code.
(j)
(1) An urban retail water supplier is granted an extension to July 1, 2011, for adoption of an urban water management plan pursuant to Part 2.6 (commencing with Section 10610) due in 2010 to allow the use of technical methodologies developed by the department pursuant to paragraph (4) of subdivision (b) and subdivision (h). An urban retail water supplier that adopts an urban water management plan due in 2010 that does not use the methodologies developed by the department pursuant to subdivision (h) shall amend the plan by July 1, 2011, to comply with this part.
(2) An urban wholesale water supplier whose urban water management plan prepared pursuant to Part 2.6 (commencing with Section 10610) was due and not submitted in 2010 is granted an extension to July 1, 2011, to permit coordination between an urban wholesale water supplier and urban retail water suppliers.

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Section 10608.22.

Notwithstanding the method adopted by an urban retail water supplier pursuant to Section 10608.20, an urban retail water supplier’s per capita daily water use reduction shall be no less than 5 percent of base daily per capita water use as defined in paragraph (3) of subdivision (c) of Section 10608.12. This section does not apply to an urban retail water supplier with a base daily per capita water use at or below 100 gallons per capita per day.

Section 10608.24.
(a) Each urban retail water supplier shall meet its interim urban water use target by December 31, 2015.
(b) Each urban retail water supplier shall meet its urban water use target by December 31, 2020.
(c) An urban retail water supplier’s compliance daily per capita water use shall be the measure of progress toward achievement of its urban water use target. (d)
(1) When determining compliance daily per capita water use, an urban retail water supplier may consider the following factors:
(A) Differences in evapotranspiration and rainfall in the baseline period compared to the compliance reporting period.
(B) Substantial changes to commercial or industrial water use resulting from increased business output and economic development that have occurred during the reporting period.
(C) Substantial changes to institutional water use resulting from fire suppression services or other extraordinary events, or from new or expanded operations, that have occurred during the reporting period. (2) If the urban retail water supplier elects to adjust its estimate of compliance daily per capita water use due to one or more of the factors described in paragraph (1), it shall provide the basis for, and data supporting, the adjustment in the report required by Section 10608.40.
(e) When developing the urban water use target pursuant to Section 10608.20, an urban retail water supplier that has a substantial percentage of industrial water use in its service area may exclude process water from the calculation of gross water use to avoid a disproportionate burden on another customer sector. (f)
(1) An urban retail water supplier that includes agricultural water use in an urban water management plan pursuant to Part 2.6 (commencing with Section 10610) may include the agricultural water use in determining ATTACHMENT 3

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gross water use. An urban retail water supplier that includes agricultural water use in determining gross water use and develops its urban water use target pursuant to paragraph (2) of subdivision (b) of Section 10608.20 shall use a water efficient standard for agricultural irrigation of 100 percent of reference evapotranspiration multiplied by the crop coefficient for irrigated acres.
(2) An urban retail water supplier, that is also an agricultural water supplier, is not subject to the requirements of Chapter 4 (commencing with Section 10608.48), if the agricultural water use is incorporated into its urban water use target pursuant to paragraph (1).

Section 10608.26.
(a) In complying with this part, an urban retail water supplier shall conduct at least one public hearing to accomplish all of the following:
(1) Allow community input regarding the urban retail water supplier’s implementation plan for complying with this part.
(2) Consider the economic impacts of the urban retail water supplier’s implementation plan for complying with this part.
(3) Adopt a method, pursuant to subdivision (b) of Section 10608.20, for determining its urban water use target.
(b) In complying with this part, an urban retail water supplier may meet its urban water use target through efficiency improvements in any combination among its customer sectors. An urban retail water supplier shall avoid placing a disproportionate burden on any customer sector.
(c) For an urban retail water supplier that supplies water to a United States Department of Defense military installation, the urban retail water supplier’s implementation plan for complying with this part shall consider the conservation of that military installation under federal Executive Order 13514. (d)
(1) Any ordinance or resolution adopted by an urban retail water supplier after the effective date of this section shall not require existing customers as of the effective date of this section, to undertake changes in product formulation, operations, or equipment that would reduce process water use, but may provide technical assistance and financial incentives to those customers to implement efficiency measures for process water. This section shall not limit an ordinance or resolution adopted pursuant to a declaration of drought emergency by an urban retail water supplier. (2) This part shall not be construed or enforced so as to interfere with the requirements of Chapter 4 (commencing with Section 113980) to Chapter 13 (commencing with Section 114380), inclusive, of Part 7 of ATTACHMENT 3

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Division 104 of the Health and Safety Code, or any requirement or standard for the protection of public health, public safety, or worker safety established by federal, state, or local government or recommended by recognized standard setting organizations or trade associations.

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

Section 10608.32.

All costs incurred pursuant to this part by a water utility regulated by the Public Utilities Commission may be recoverable in rates subject to review and approval by the Public Utilities Commission, and may be recorded in a memorandum account and reviewed for reasonableness by the Public Utilities Commission.

Section 10608.34.
(a)
(1) On or before January 1, 2017, the department shall adopt rules for all of the following:
(A) The conduct of standardized water loss audits by urban retail water suppliers in accordance with the method adopted by the American Water Works Association in the third edition of Water Audits and Loss ATTACHMENT 3

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Control Programs, Manual M36 and in the Free Water Audit Software, version 5.0.
(B) The process for validating a water loss audit report prior to submitting the report to the department. For the purposes of this section, “validating” is a process whereby an urban retail water supplier uses a technical expert to confirm the basis of all data entries in the urban retail water supplier’s water loss audit report and to appropriately characterize the quality of the reported data. The validation process shall follow the principles and terminology laid out by the American Water Works Association in the third edition of Water Audits and Loss Control Programs, Manual M36 and in the Free Water Audit Software, version 5.0. A validated water loss audit report shall include the name and technical qualifications of the person engaged for validation.
(C) The technical qualifications required of a person to engage in validation, as described in subparagraph (B).
(D) The certification requirements for a person selected by an urban retail water supplier to provide validation of its own water loss audit report.
(E) The method of submitting a water loss audit report to the department.
(2) The department shall update rules adopted pursuant to paragraph (1) no later than six months after the release of subsequent editions of the American Water Works Association’s Water Audits and Loss Control Programs, Manual M36. Except as provided by the department, until the department adopts updated rules pursuant to this paragraph, an urban retail water supplier may rely upon a subsequent edition of the American Water Works Association’s Water Audits and Loss Control Programs, Manual M36 or the Free Water Audit Software.
(b)
(1) On or before October 1 of each year until October 1, 2023, each urban retail water supplier reporting on a calendar year basis shall submit a completed and validated water loss audit report for the previous calendar year or the previous fiscal year as prescribed by the department pursuant to subdivision (a).
(2) On or before January 1 of each year until January 1, 2024, each urban retail water supplier reporting on a fiscal year basis shall submit a completed and validated water loss audit report for the previous fiscal year as prescribed by the department pursuant to subdivision (a). (3) On or before January 1, 2024, and on or before January 1 of each year thereafter, each urban retail water supplier shall submit a completed and ATTACHMENT 3

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validated water loss audit report for the previous calendar year or previous fiscal year as part of the report submitted to the department pursuant to subdivision (a) of Section 10609.24 and as prescribed by the department pursuant to subdivision (a).
(4) Water loss audit reports submitted on or before October 1, 2017, may be completed and validated with assistance as described in subdivision (c). (c) Using funds available for the 2016–17 fiscal year, the board shall contribute up to four hundred thousand dollars ($400,000) towards procuring water loss audit report validation assistance for urban retail water suppliers. (d) Each water loss audit report submitted to the department shall be accompanied by information, in a form specified by the department, identifying steps taken in the preceding year to increase the validity of data entered into the final audit, reduce the volume of apparent losses, and reduce the volume of real losses.
(e) At least one of the following employees of an urban retail water supplier shall attest to each water loss audit report submitted to the department:
(1) The chief financial officer.
(2) The chief engineer.
(3) The general manager.
(f) The department shall deem incomplete and return to the urban retail water supplier any final water loss audit report found by the department to be incomplete, not validated, unattested, or incongruent with known characteristics of water system operations. A water supplier shall resubmit a completed water loss audit report within 90 days of an audit being returned by the department.
(g) The department shall post all validated water loss audit reports on its internet website in a manner that allows for comparisons across water suppliers. The department shall make the validated water loss audit reports available for public viewing in a timely manner after their receipt.
(h) Using available funds, the department shall provide technical assistance to guide urban retail water suppliers’ water loss detection programs, including, but not limited to, metering techniques, pressure management techniques, condition-based assessment techniques for transmission and distribution pipelines, and utilization of portable and permanent water loss detection devices.
(i) No earlier than January 1, 2019, and no later than July 1, 2020, the board shall adopt rules requiring urban retail water suppliers to meet performance standards for the volume of water losses. In adopting these rules, the board shall employ full life-cycle cost accounting to evaluate the costs of meeting the performance standards. The board may consider establishing a minimum ATTACHMENT 3

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allowable water loss threshold that, if reached and maintained by an urban water supplier, would exempt the urban water supplier from further water loss reduction requirements.

Section 10608.35.
(a) The department, in coordination with the board, shall conduct necessary studies and investigations and make a recommendation to the Legislature, by January 1, 2020, on the feasibility of developing and enacting water loss reporting requirements for urban wholesale water suppliers. (b) The studies and investigations shall include an evaluation of the suitability of applying the processes and requirements of Section 10608.34 to urban wholesale water suppliers.
(c) In conducting necessary studies and investigations and developing its recommendation, the department shall solicit broad public participation from stakeholders and other interested persons.

Section 10608.36.

Urban wholesale water suppliers shall include in the urban water management plans required pursuant to Part 2.6 (commencing with Section 10610) an assessment of their present and proposed future measures, programs, and policies to help achieve the water use reductions required by this part.

Section 10608.40.

Urban water retail suppliers shall report to the department on their progress in meeting their urban water use targets as part of their urban water management plans submitted pursuant to Section 10631. The data shall be reported using a standardized form developed pursuant to Section 10608.52.

Section 10608.42.
(a) The department shall review the 2015 urban water management plans and report to the Legislature by July 1, 2017, on progress towards achieving a 20- percent reduction in urban water use by December 31, 2020. The report shall include recommendations on changes to water efficiency standards or urban water use targets to achieve the 20- percent reduction and to reflect updated efficiency information and technology changes.
(b) A report to be submitted pursuant to subdivision (a) shall be submitted in compliance with Section 9795 of the Government Code.

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Section 10608.43.

The department, in conjunction with the California Urban Water Conservation Council, by April 1, 2010, shall convene a representative task force consisting of academic experts, urban retail water suppliers, environmental organizations, commercial water users, industrial water users, and institutional water users to develop alternative best management practices for commercial, industrial, and institutional users and an assessment of the potential statewide water use efficiency improvement in the commercial, industrial, and institutional sectors that would result from implementation of these best management practices. The taskforce, in conjunction with the department, shall submit a report to the Legislature by April 1, 2012, that shall include a review of multiple sectors within commercial, industrial, and institutional users and that shall recommend water use efficiency standards for commercial, industrial, and institutional users among various sectors of water use.

The report shall include, but not be limited to, the following:
(a) Appropriate metrics for evaluating commercial, industrial, and institutional water use.
(b) Evaluation of water demands for manufacturing processes, goods, and cooling. (c) Evaluation of public infrastructure necessary for delivery of recycled water to the commercial, industrial, and institutional sectors.
(d) Evaluation of institutional and economic barriers to increased recycled water use within the commercial, industrial, and institutional sectors. (e) Identification of technical feasibility and cost of the best management practices to achieve more efficient water use statewide in the commercial, industrial, and institutional sectors that is consistent with the public interest and reflects past investments in water use efficiency.

Section 10608.44.

Each state agency shall reduce water use at facilities it operates to support urban retail water suppliers in meeting the target identified in Section 10608.16.

Chapter 5. Sustainable Water Management,
Section 10608.50
Section 10608.50.
(a) The department, in consultation with the board, shall promote implementation of regional water resources management practices through increased incentives and removal of barriers consistent with state and federal law.

Potential changes may include, but are not limited to, all of the following:

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(1) Revisions to the requirements for urban and agricultural water management plans.
(2) Revisions to the requirements for integrated regional water management plans.
(3) Revisions to the eligibility for state water management grants and loans. (4) Revisions to state or local permitting requirements that increase water supply opportunities, but do not weaken water quality protection under state and federal law.
(5) Increased funding for research, feasibility studies, and project construction.
(6) Expanding technical and educational support for local land use and water management agencies.
(b) No later than January 1, 2011, and updated as part of the California Water Plan, the department, in consultation with the board, and with public input, shall propose new statewide targets, or review and update existing statewide targets, for regional water resources management practices, including, but not limited to, recycled water, brackish groundwater desalination, and infiltration and direct use of urban stormwater runoff.

Chapter 6. Standardized Data Collection,
Section 10608.52
Section 10608.52.
(a) The department, in consultation with the board, the California Bay-Delta Authority or its successor agency, the State Department of Public Health, and the Public Utilities Commission, shall develop a single standardized water use reporting form to meet the water use information needs of each agency, including the needs of urban water suppliers that elect to determine and report progress toward achieving targets on a regional basis as provided in subdivision (a) of Section 10608.28.
(b) At a minimum, the form shall be developed to accommodate information sufficient to assess an urban water supplier’s compliance with conservation targets pursuant to Section 10608.24 and an agricultural water supplier’s compliance with implementation of efficient water management practices pursuant to subdivision (a) of Section 10608.48. The form shall accommodate reporting by urban water suppliers on an individual or regional basis as provided in subdivision (a) of Section 10608.28.

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Chapter 7. Funding Provisions, Sections 10608.56–
10608.60
Section 10608.56.
(a) On and after July 1, 2016, an urban retail water supplier is not eligible for a water grant or loan awarded or administered by the state unless the supplier complies with this part.
(b) On and after July 1, 2013, an agricultural water supplier is not eligible for a water grant or loan awarded or administered by the state unless the supplier complies with this part.
(c) Notwithstanding subdivision (a), the department shall determine that an urban retail water supplier is eligible for a water grant or loan even though the supplier has not met the per capita reductions required pursuant to Section 10608.24, if the urban retail water supplier has submitted to the department for approval a schedule, financing plan, and budget, to be included in the grant or loan agreement, for achieving the per capita reductions. The supplier may request grant or loan funds to achieve the per capita reductions to the extent the request is consistent with the eligibility requirements applicable to the water funds.
(d) Notwithstanding subdivision (b), the department shall determine that an agricultural water supplier is eligible for a water grant or loan even though the supplier is not implementing all of the efficient water management practices described in Section 10608.48, if the agricultural water supplier has submitted to the department for approval a schedule, financing plan, and budget, to be included in the grant or loan agreement, for implementation of the efficient water management practices. The supplier may request grant or loan funds to implement the efficient water management practices to the extent the request is consistent with the eligibility requirements applicable to the water funds. (e) Notwithstanding subdivision (a), the department shall determine that an urban retail water supplier is eligible for a water grant or loan even though the supplier has not met the per capita reductions required pursuant to Section 10608.24, if the urban retail water supplier has submitted to the department for approval documentation demonstrating that its entire service area qualifies as a disadvantaged community.
(f) The department shall not deny eligibility to an urban retail water supplier or agricultural water supplier in compliance with the requirements of this part and Part 2.8 (commencing with Section 10800), that is participating in a multiagency water project, or an integrated regional water management plan, developed pursuant to Section 75026 of the Public Resources Code, solely on the basis that one or more of the agencies participating in the project or plan ATTACHMENT 3

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is not implementing all of the requirements of this part or Part 2.8 (commencing with Section 10800).

Section 10608.60.
(a) It is the intent of the Legislature that funds made available by Section 75026 of the Public Resources Code should be expended, consistent with Division 43 (commencing with Section 75001) of the Public Resources Code and upon appropriation by the Legislature, for grants to implement this part. In the allocation of funding, it is the intent of the Legislature that the department give consideration to disadvantaged communities to assist in implementing the requirements of this part.
(b) It is the intent of the Legislature that funds made available by Section 75041 of the Public Resources Code, should be expended, consistent with Division 43 (commencing with Section 75001) of the Public Resources Code and upon appropriation by the Legislature, for direct expenditures to implement this part.

Chapter 9. Urban Water Use Objectives and Water Use
Reporting, Sections 10609–10609.38
Section 10609.
(a) The Legislature finds and declares that this chapter establishes a method to estimate the aggregate amount of water that would have been delivered the previous year by an urban retail water supplier if all that water had been used efficiently. This estimated aggregate water use is the urban retail water supplier’s urban water use objective. The method is based on water use efficiency standards and local service area characteristics for that year. By comparing the amount of water actually used in the previous year with the urban water use objective, local urban water suppliers will be in a better position to help eliminate unnecessary use of water; that is, water used in excess of that needed to accomplish the intended beneficial use. (b) The Legislature further finds and declares all of the following:
(1) This chapter establishes standards and practices for the following water uses:
(A) Indoor residential use.
(B) Outdoor residential use.
(C) CII water use.
(D) Water losses.

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(E) Other unique local uses and situations that can have a material effect on an urban water supplier’s total water use.
(2) This chapter further does all of the following:
(A) Establishes a method to calculate each urban water use objective. (B) Considers recycled water quality in establishing efficient irrigation standards.
(C) Requires the department to provide or otherwise identify data regarding the unique local conditions to support the calculation of an urban water use objective.
(D) Provides for the use of alternative sources of data if alternative sources are shown to be as accurate as, or more accurate than, the data provided by the department.
(E) Requires annual reporting of the previous year’s water use with the urban water use objective.
(F) Provides a bonus incentive for the amount of potable recycled water used the previous year when comparing the previous year’s water use with the urban water use objective, of up to 10 percent of the urban water use objective.
(3) This chapter requires the department and the board to solicit broad public participation from stakeholders and other interested persons in the development of the standards and the adoption of regulations pursuant to this chapter.
(4) This chapter preserves the Legislature’s authority over long- term water use efficiency target setting and ensures appropriate legislative oversight of the implementation of this chapter by doing all of the following:
(A) Requiring the Legislative Analyst to conduct a review of the implementation of this chapter, including compliance with the adopted standards and regulations, accuracy of the data, use of alternate data, and other issues the Legislative Analyst deems appropriate.
(B) Stating legislative intent that the director of the department and the chairperson of the board appear before the appropriate Senate and Assembly policy committees to report on progress in implementing this chapter.
(C) Providing one-time-only authority to the department and board to adopt water use efficiency standards, except as explicitly provided in this chapter. Authorization to update the standards shall require separate legislation.

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(c) It is the intent of the Legislature that the following principles apply to the development and implementation of long-term standards and urban water use objectives:
(1) Local urban retail water suppliers should have primary responsibility for meeting standards-based water use targets, and they shall retain the flexibility to develop their water supply portfolios, design and implement water conservation strategies, educate their customers, and enforce their rules.
(2) Long-term standards and urban water use objectives should advance the state’s goals to mitigate and adapt to climate change.
(3) Long-term standards and urban water use objectives should acknowledge the shade, air quality, and heat-island reduction benefits provided to communities by trees through the support of water-efficient irrigation practices that keep trees healthy.
(4) The state should identify opportunities for streamlined reporting, eliminate redundant data submissions, and incentivize open access to data collected by urban and agricultural water suppliers.

Section 10609.2.
(a) The board, in coordination with the department, shall adopt long-term standards for the efficient use of water pursuant to this chapter on or before June 30, 2022.
(b) Standards shall be adopted for all of the following:
(1) Outdoor residential water use.
(2) Outdoor irrigation of landscape areas with dedicated irrigation meters in connection with CII water use.
(3) A volume for water loss.
(c) When adopting the standards under this section, the board shall consider the policies of this chapter and the proposed efficiency standards’ effects on local wastewater management, developed and natural parklands, and urban tree health. The standards and potential effects shall be identified by May 30, 2022.

The board shall allow for public comment on potential effects identified by the board under this subdivision.
(d) The long-term standards shall be set at a level designed so that the water use objectives, together with other demands excluded from the long-term standards such as CII indoor water use and CII outdoor water use not connected to a dedicated landscape meter, would exceed the statewide conservation targets required pursuant to Chapter 3 (commencing with Section 10608.16).

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(e) The board, in coordination with the department, shall adopt by regulation variances recommended by the department pursuant to Section 10609.14 and guidelines and methodologies pertaining to the calculation of an urban retail water supplier’s urban water use objective recommended by the department pursuant to Section 10609.16.

Section 10609.4.
(a)
(1) Until January 1, 2025, the standard for indoor residential water use shall be 55 gallons per capita daily.
(2) Beginning January 1, 2025, and until January 1, 2030, the standard for indoor residential water use shall be 47 gallons per capita daily. (3) Beginning January 1, 2030, the standard for indoor residential water use shall be 42 gallons per capita daily.
(b)
(1) The department, in coordination with the board, shall conduct necessary studies and investigations to assess and quantify the economic benefits and impacts of the 2030 indoor residential use standard on water, wastewater, and recycled water systems and shall include saturation end- use studies. The studies and investigations shall build on the standards and potential effects identified pursuant to subdivision (c) of Section 10609.2 and shall also consider, and as appropriate incorporate, other regional and statewide studies that quantify the impacts on water, wastewater, and recycled water systems, and evaluate the long-term effects of telework. To facilitate these studies and investigations, the board may request necessary and relevant information from wastewater agencies, including monthly influent flow, actions taken to reassess treatment processes, and the impact of the implementation of this chapter on wastewater operations, maintenance, and capital investment.

The department, in coordination with the board, shall summarize the findings of these studies and investigations in a report to the Legislature on or before October 1, 2028. The report shall be submitted in compliance with Section 9795 of the Government Code.
(2) If the department, in coordination with the board, determines that the 2030 indoor residential use standard is likely to unduly impact affordability of water and wastewater services, the department and the board may jointly recommend to the Legislature an alternate date on which the 2030 indoor residential use standard shall take effect. This determination shall be made using at least two years of data reflecting application of the 2025 indoor residential use standard.

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(3) Based upon the studies and investigations conducted pursuant to paragraph (1), the department shall consider whether to recommend, for adoption by the board, additional variances to accommodate unique challenges related to residential indoor water use pursuant to Section 10609.2. Variance options may include, but are not limited to, stranded assets, impacts on disadvantaged communities, impacts to environmental flows, or adverse impacts to wastewater or recycled water operations.
(4) The studies, investigations, and report described in paragraph (1) shall include timely and inclusive collaboration with, and input from, a broad group of stakeholders, including, but not limited to, environmental groups, experts in indoor plumbing, water, wastewater, and recycled water agencies.
(c) An urban retail water supplier shall not be subject to enforcement pursuant to this chapter solely for failing to meet the indoor residential use standard.

Section 10609.6.
(a)
(1) The department, in coordination with the board, shall conduct necessary studies and investigations and recommend, no later than October 1, 2021, standards for outdoor residential use for adoption by the board in accordance with this chapter.
(2)
(A) The standards shall incorporate the principles of the model water efficient landscape ordinance adopted by the department pursuant to the Water Conservation in Landscaping Act (Article 10.8 (commencing with Section 65591) of Chapter 3 of Division 1 of Title 7 of the Government Code).
(B) The standards shall apply to irrigable lands.
(C) The standards shall include provisions for swimming pools, spas, and other water features. Ornamental water features that are artificially supplied with water, including ponds, lakes, waterfalls, and fountains, shall be analyzed separately from swimming pools and spas. (b) The department shall, by January 1, 2021, provide each urban retail water supplier with data regarding the area of residential irrigable lands in a manner that can reasonably be applied to the standards adopted pursuant to this section.
(c) The department shall not recommend standards pursuant to this section until it has conducted pilot projects or studies, or some combination of the two, to ensure that the data provided to local agencies are reasonably accurate for the ATTACHMENT 3

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data’s intended uses, taking into consideration California’s diverse landscapes and community characteristics.

Section 10609.8.
(a) The department, in coordination with the board, shall conduct necessary studies and investigations and recommend, no later than October 1, 2021, standards for outdoor irrigation of landscape areas with dedicated irrigation meters or other means of calculating outdoor irrigation use in connection with CII water use for adoption by the board in accordance with this chapter. (b) The standards shall incorporate the principles of the model water efficient landscape ordinance adopted by the department pursuant to the Water Conservation in Landscaping Act (Article 10.8 (commencing with Section 65591) of Chapter 3 of Division 1 of Title 7 of the Government Code). (c) The standards shall include an exclusion for water for commercial agricultural use meeting the definition of subdivision (b) of Section 51201 of the Government Code.

Section 10609.9.

For purposes of Sections 10609.6 and 10609.8, “principles of the model water efficient landscape ordinance” means those provisions of the model water efficient landscape ordinance applicable to the establishment or determination of the amount of water necessary to efficiently irrigate both new and existing landscapes.

These provisions include, but are not limited to, all of the following:
(a) Evapotranspiration adjustment factors, as applicable. (b) Landscape area.
(c) Maximum applied water allowance.
(d) Reference evapotranspiration.
(e) Special landscape areas, including provisions governing evapotranspiration adjustment factors for different types of water used for irrigating the landscape.

Section 10609.10.
(a) The department, in coordination with the board, shall conduct necessary studies and investigations and recommend, no later than October 1, 2021, performance measures for CII water use for adoption by the board in accordance with this chapter.
(b) Prior to recommending performance measures for CII water use, the department shall solicit broad public participation from stakeholders and other interested persons relating to all of the following:

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(1) Recommendations for a CII water use classification system for California that address significant uses of water.
(2) Recommendations for setting minimum size thresholds for converting mixed CII meters to dedicated irrigation meters, and evaluation of, and recommendations for, technologies that could be used in lieu of requiring dedicated irrigation meters.
(3) Recommendations for CII water use best management practices, which may include, but are not limited to, water audits and water management plans for those CII customers that exceed a recommended size, volume of water use, or other threshold.
(c) Recommendations of appropriate performance measures for CII water use shall be consistent with the October 21, 2013, report to the Legislature by the Commercial, Industrial, and Institutional Task Force entitled “Water Use Best Management Practices,” including the technical and financial feasibility recommendations provided in that report, and shall support the economic productivity of California’s commercial, industrial, and institutional sectors. (b)
(1) The board, in coordination with the department, shall adopt performance measures for CII water use on or before June 30, 2022.
(2) Each urban retail water supplier shall implement the performance measures adopted by the board pursuant to paragraph (1).

Section 10609.12.

The standards for water loss for urban retail water suppliers shall be the standards adopted by the board pursuant to subdivision (i) of Section 10608.34.

Section 10609.14.
(a) The department, in coordination with the board, shall conduct necessary studies and investigations and, no later than October 1, 2021, recommend for adoption by the board in accordance with this chapter appropriate variances for unique uses that can have a material effect on an urban retail water supplier’s urban water use objective.
(b) Appropriate variances may include, but are not limited to, allowances for the following:
(1) Significant use of evaporative coolers.
(2) Significant populations of horses and other livestock. (3) Significant fluctuations in seasonal populations.
(4) Significant landscaped areas irrigated with recycled water having high levels of total dissolved solids.

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(5) Significant use of water for soil compaction and dust control. (6) Significant use of water to supplement ponds and lakes to sustain wildlife. (7) Significant use of water to irrigate vegetation for fire protection. (8) Significant use of water for commercial or noncommercial agricultural use. (d) The department, in recommending variances for adoption by the board, shall also recommend a threshold of significance for each recommended variance. (e) Before including any specific variance in calculating an urban retail water supplier’s water use objective, the urban retail water supplier shall request and receive approval by the board for the inclusion of that variance. (f) The board shall post on its Internet Web site all of the following:
(1) A list of all urban retail water suppliers with approved variances. (2) The specific variance or variances approved for each urban retail water supplier.
(3) The data supporting approval of each variance.

Section 10609.15.

To help streamline water data reporting, the department and the board shall do all of the following:
(a) Identify urban water reporting requirements shared by both agencies, and post on each agency’s Internet Web site how the data is used for planning, regulatory, or other purposes.
(b) Analyze opportunities for more efficient publication of urban water reporting requirements within each agency, and analyze how each agency can integrate various data sets in a publicly accessible location, identify priority actions, and implement priority actions identified in the analysis.
(c) Make appropriate data pertaining to the urban water reporting requirements that are collected by either agency available to the public according to the principles and requirements of the Open and Transparent Water Data Act (Part 4.9 (commencing with Section 12400)).

Section 10609.16.

The department, in coordination with the board, shall conduct necessary studies and investigations and recommend, no later than October 1, 2021, guidelines and methodologies for the board to adopt that identify how an urban retail water supplier calculates its urban water use objective. The guidelines and methodologies shall address, as necessary, all of the following:

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(a) Determining the irrigable lands within the urban retail water supplier’s service area.
(b) Updating and revising methodologies described pursuant to subparagraph (A) of paragraph (1) of subdivision (h) of Section 10608.20, as appropriate, including methodologies for calculating the population in an urban retail water supplier’s service area.
(c) Using landscape area data provided by the department or alternative data. (d) Incorporating precipitation data and climate data into estimates of a urban retail water supplier’s outdoor irrigation budget for its urban water use objective.
(e) Estimating changes in outdoor landscape area and population, and calculating the urban water use objective, for years when updated landscape imagery is not available from the department.
(f) Determining acceptable levels of accuracy for the supporting data, the urban water use objective, and compliance with the urban water use objective.

Section 10609.18.

The department and the board shall solicit broad public participation from stakeholders and other interested persons in the development of the standards and the adoption of regulations pursuant to this chapter. The board shall hold at least one public meeting before taking any action on any standard or variance recommended by the department.

Section 10609.20.
(a) Each urban retail water supplier shall calculate its urban water use objective no later than January 1, 2024, and by January 1 every year thereafter. (b) The calculation shall be based on the urban retail water supplier’s water use conditions for the previous calendar or fiscal year.
(c) Each urban water supplier’s urban water use objective shall be composed of the sum of the following:
(1) Aggregate estimated efficient indoor residential water use. (2) Aggregate estimated efficient outdoor residential water use. (3) Aggregate estimated efficient outdoor irrigation of landscape areas with dedicated irrigation meters or equivalent technology in connection with CII water use.
(4) Aggregate estimated efficient water losses.
(5) Aggregate estimated water use in accordance with variances, as appropriate.

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(d)
(1) An urban retail water supplier that delivers water from a groundwater basin, reservoir, or other source that is augmented by potable reuse water may adjust its urban water use objective by a bonus incentive calculated pursuant to this subdivision.
(2) The water use objective bonus incentive shall be the volume of its potable reuse delivered to residential water users and to landscape areas with dedicated irrigation meters in connection with CII water use, on an acre- foot basis.
(3) The bonus incentive pursuant to paragraph (1) shall be limited in accordance with one of the following:
(A) The bonus incentive shall not exceed 15 percent of the urban water supplier’s water use objective for any potable reuse water produced at an existing facility.
(B) The bonus incentive shall not exceed 10 percent of the urban water supplier’s water use objective for any potable reuse water produced at any facility that is not an existing facility.
(4) For purposes of this subdivision, “existing facility” means a facility that meets all of the following:
(A) The facility has a certified environmental impact report, mitigated negative declaration, or negative declaration on or before January 1, 2019.
(B) The facility begins producing and delivering potable reuse water on or before January 1, 2022.
(C) The facility uses microfiltration and reverse osmosis technologies to produce the potable reuse water.
(e)
(1) The calculation of the urban water use objective shall be made using landscape area and other data provided by the department and pursuant to the standards, guidelines, and methodologies adopted by the board.

The department shall provide data to the urban water supplier at a level of detail sufficient to allow the urban water supplier to verify its accuracy at the parcel level.
(2) Notwithstanding paragraph (1), an urban retail water supplier may use alternative data in calculating the urban water use objective if the supplier demonstrates to the department that the alternative data are equivalent, or superior, in quality and accuracy to the data provided by the department. The department may provide technical assistance to an ATTACHMENT 3

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urban retail water supplier in evaluating whether the alternative data are appropriate for use in calculating the supplier’s urban water use objective.

Section 10609.21.
(a) For purposes of Section 10609.20, and notwithstanding paragraph (4) of subdivision (d) of Section 10609.20, “existing facility” also includes the North City Project, phase one of the Pure Water San Diego Program, for which an environmental impact report was certified on April 10, 2018. (b) This section shall become operative on January 1, 2019.

Section 10609.22.
(a) An urban retail water supplier shall calculate its actual urban water use no later than January 1, 2024, and by January 1 every year thereafter. (b) The calculation shall be based on the urban retail water supplier’s water use for the previous calendar or fiscal year.
(c) Each urban water supplier’s urban water use shall be composed of the sum of the following:
(1) Aggregate residential water use.
(2) Aggregate outdoor irrigation of landscape areas with dedicated irrigation meters in connection with CII water use.
(3) Aggregate water losses.

Section 10609.24.
(a) An urban retail water supplier shall submit a report to the department no later than January 1, 2024, and by January 1 every year thereafter. The report shall include all of the following:
(1) The urban water use objective calculated pursuant to Section 10609.20 along with relevant supporting data.
(2) The actual urban water use calculated pursuant to Section 10609.22 along with relevant supporting data.
(3) Documentation of the implementation of the performance measures for CII water use.
(4) A description of the progress made towards meeting the urban water use objective.
(5) The validated water loss audit report conducted pursuant to Section 10608.34.
(b) The department shall post the reports and information on its internet website.

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(c) The board may issue an information order or conservation order to, or impose civil liability on, an entity or individual for failure to submit a report required by this section.

Section 10609.25.

As part of the first report submitted to the department by an urban retail water supplier no later than January 1, 2024, pursuant to subdivision (a) of Section 10609.24, each urban retail water supplier shall provide a narrative that describes the water demand management measures that the supplier plans to implement to achieve its urban water use objective by January 1, 2027.

Section 10609.26.
(a)
(1) On and after January 1, 2024, the board may issue informational orders pertaining to water production, water use, and water conservation to an urban retail water supplier that does not meet its urban water use objective required by this chapter. Informational orders are intended to obtain information on supplier activities, water production, and conservation efforts in order to identify technical assistance needs and assist urban water suppliers in meeting their urban water use objectives. (2) In determining whether to issue an informational order, the board shall consider the degree to which the urban retail water supplier is not meeting its urban water use objective, information provided in the report required by Section 10609.24, and actions the urban retail water supplier has implemented or will implement in order to help meet the urban water use objective.
(3) The board shall share information received pursuant to this subdivision with the department.
(4) An urban water supplier may request technical assistance from the department. The technical assistance may, to the extent available, include guidance documents, tools, and data.
(b) On and after January 1, 2025, the board may issue a written notice to an urban retail water supplier that does not meet its urban water use objective required by this chapter. The written notice may warn the urban retail water supplier that it is not meeting its urban water use objective described in Section 10609.20 and is not making adequate progress in meeting the urban water use objective, and may request that the urban retail water supplier address areas of concern in its next annual report required by Section 10609.24. In deciding whether to issue a written notice, the board may consider whether the urban retail water supplier has received an informational order, the degree to which the urban retail water supplier is not ATTACHMENT 3

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meeting its urban water use objective, information provided in the report required by Section 10609.24, and actions the urban retail water supplier has implemented or will implement in order to help meet its urban water use objective.
(1) On and after January 1, 2026, the board may issue a conservation order to an urban retail water supplier that does not meet its urban water use objective. A conservation order may consist of, but is not limited to, referral to the department for technical assistance, requirements for education and outreach, requirements for local enforcement, and other efforts to assist urban retail water suppliers in meeting their urban water use objective.
(2) In issuing a conservation order, the board shall identify specific deficiencies in an urban retail water supplier’s progress towards meeting its urban water use objective, and identify specific actions to address the deficiencies.
(3) The board may request that the department provide an urban retail water supplier with technical assistance to support the urban retail water supplier’s actions to remedy the deficiencies.
(c) A conservation order issued in accordance with this chapter may include requiring actions intended to increase water-use efficiency, but shall not curtail or otherwise limit the exercise of a water right, nor shall it require the imposition of civil liability pursuant to Section 377.

Section 10609.27.

Notwithstanding Section 10609.26, the board shall not issue an information order, written notice, or conservation order pursuant to Section 10609.26 if both of the following conditions are met:
(a) The board determines that the urban retail water supplier is not meeting its urban water use objective solely because the volume of water loss exceeds the urban retail water supplier’s standard for water loss.
(b) Pursuant to Section 10608.34, the board is taking enforcement action against the urban retail water supplier for not meeting the performance standards for the volume of water losses.

Section 10609.28.

The board may issue a regulation or informational order requiring a wholesale water supplier, an urban retail water supplier, or a distributor of a public water supply, as that term is used in Section 350, to provide a monthly report relating to water production, water use, or water conservation.

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Section 10609.30.

On or before January 10, 2024, the Legislative Analyst shall provide to the appropriate policy committees of both houses of the Legislature and the public a report evaluating the implementation of the water use efficiency standards and water use reporting pursuant to this chapter. The board and the department shall provide the Legislative Analyst with the available data to complete this report. (a) The report shall describe all of the following:
(1) The rate at which urban retail water users are complying with the standards, and factors that might facilitate or impede their compliance. (2) The accuracy of the data and estimates being used to calculate urban water use objectives.
(3) Indications of the economic impacts, if any, of the implementation of this chapter on urban water suppliers and urban water users, including CII water users.
(4) The frequency of use of the bonus incentive, the volume of water associated with the bonus incentive, value to urban water suppliers of the bonus incentive, and any implications of the use of the bonus incentive on water use efficiency.
(5) The early indications of how implementing this chapter might impact the efficiency of statewide urban water use.
6) Recommendations, if any, for improving statewide urban water use efficiency and the standards and practices described in this chapter. (7) Any other issues the Legislative Analyst deems appropriate.

Section 10609.32.

It is the intent of the Legislature that the chairperson of the board and the director of the department appear before the appropriate policy committees of both houses of the Legislature on or around January 1, 2026, and report on the implementation of the water use efficiency standards and water use reporting pursuant to this chapter. It is the intent of the Legislature that the topics to be covered include all of the following:
(a) The rate at which urban retail water suppliers are complying with the standards, and factors that might facilitate or impede their compliance. (b) What enforcement actions have been taken, if any.
(c) The accuracy of the data and estimates being used to calculate urban water use objectives.

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(d) Indications of the economic impacts, if any, of the implementation of this chapter on urban water suppliers and urban water users, including CII water users.
(e) The frequency of use of the bonus incentive, the volume of water associated with the bonus incentive, value to urban water suppliers of the bonus incentive, and any implications of the use of the bonus incentive on water use efficiency.
(f) An assessment of how implementing this chapter is affecting the efficiency of statewide urban water use.

Section 10609.34.

Notwithstanding Section 15300.2 of Title 14 of the California Code of Regulations, an action of the board taken under this chapter shall be deemed to be a Class 8 action, within the meaning of Section 15308 of Title 14 of the California Code of Regulations, provided that the action does not involve relaxation of existing water conservation or water use standards.

Section 10609.36.
(a) Nothing in this chapter shall be construed to determine or alter water rights.

Sections 1010 and 1011 apply to water conserved through implementation of this chapter.
(b) Nothing in this chapter shall be construed to authorize the board to update or revise water use efficiency standards authorized by this chapter except as explicitly provided in this chapter. Authorization to update the standards beyond that explicitly provided in this chapter shall require separate legislation.
(c) Nothing in this chapter shall be construed to limit or otherwise affect the use of recycled water as seawater barriers for groundwater salinity management.

Section 10609.38.

The board may waive the requirements of this chapter for a period of up to five years for any urban retail water supplier whose water deliveries are significantly affected by changes in water use as a result of damage from a disaster such as an earthquake or fire. In establishing the period of a waiver, the board shall take into consideration the breadth of the damage and the time necessary for the damaged areas to recover from the disaster.

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Urban Water Management Planning Act
This section contains information extracted from Water Code Division 6, Conservation, Development, and Utilization of State Water Resources, Part 2.6, Urban Water Management Planning. Click on any section header below to read Water Code directly at the California Legislative Information website.

Chapter 1. General Declaration and Policy,
Sections 10610–10610.4
Section 10610.

This part shall be known and may be cited as the “Urban Water Management Planning Act.”
Section 10610.2.
(a) The Legislature finds and declares all of the following:
(1) The waters of the state are a limited and renewable resource subject to ever-increasing demands.
(2) The conservation and efficient use of urban water supplies are of statewide concern; however, the planning for that use and the implementation of those plans can best be accomplished at the local level. (3) A long-term, reliable supply of water is essential to protect the productivity of California’s businesses and economic climate, and increasing long-term water conservation among Californians, improving water use efficiency within the state’s communities and agricultural production, and strengthening local and regional drought planning are critical to California’s resilience to drought and climate change. (4) As part of its long-range planning activities, every urban water supplier should make every effort to ensure the appropriate level of reliability in its water service sufficient to meet the needs of its various categories of customers during normal, dry, and multiple dry water years now and into the foreseeable future, and every urban water supplier should collaborate closely with local land-use authorities to ensure water demand forecasts are consistent with current land-use planning.
(5) Public health issues have been raised over a number of contaminants that have been identified in certain local and imported water supplies. (6) Implementing effective water management strategies, including groundwater storage projects and recycled water projects, may require ATTACHMENT 3

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specific water quality and salinity targets for meeting groundwater basins water quality objectives and promoting beneficial use of recycled water. (7) Water quality regulations are becoming an increasingly important factor in water agencies’ selection of raw water sources, treatment alternatives, and modifications to existing treatment facilities.
(8) Changes in drinking water quality standards may also impact the usefulness of water supplies and may ultimately impact supply reliability. (9) The quality of source supplies can have a significant impact on water management strategies and supply reliability.
(b) This part is intended to provide assistance to water agencies in carrying out their long-term resource planning responsibilities to ensure adequate water supplies to meet existing and future demands for water.

Section 10610.4.

The Legislature finds and declares that it is the policy of the state as follows:
(a) The management of urban water demands and efficient use of water shall be actively pursued to protect both the people of the state and their water resources.
(b) The management of urban water demands and efficient use of urban water supplies shall be a guiding criterion in public decisions. (c) Urban water suppliers shall be required to develop water management plans to achieve the efficient use of available supplies and strengthen local drought planning.

Chapter 2. Definitions, Sections 10611–10618
Section 10611.

Unless the context otherwise requires, the definitions of this chapter govern the construction of this part.

Section 10611.3.
“Customer” means a purchaser of water from a water supplier who uses the water for municipal purposes, including residential, commercial, governmental, and industrial uses.

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Section 10611.5.
“Demand management” means those water conservation measures, programs, and incentives that prevent the waste of water and promote the reasonable and efficient use and reuse of available supplies.

Section 10612.
“Drought risk assessment” means a method that examines water shortage risks based on the driest five-year historic sequence for the agency’s water supply, as described in subdivision (b) of Section 10635.

Section 10613.
“Efficient use” means those management measures that result in the most effective use of water so as to prevent its waste or unreasonable use or unreasonable method of use.

Section 10614.
“Person” means any individual, firm, association, organization, partnership, business, trust, corporation, company, public agency, or any agency of such an entity.

Section 10615.
“Plan” means an urban water management plan prepared pursuant to this part. A plan shall describe and evaluate sources of supply, reasonable and practical efficient uses, reclamation and demand management activities. The components of the plan may vary according to an individual community or area's characteristics and its capabilities to efficiently use and conserve water. The plan shall address measures for residential, commercial, governmental, and industrial water demand management as set forth in Article 2 (commencing with Section 10630) of Chapter 3. In addition, a strategy and time schedule for implementation shall be included in the plan.

Section 10616.
“Public agency” means any board, commission, county, city and county, city, regional agency, district, or other public entity.

Section 10616.5.
“Recycled water” means the reclamation and reuse of wastewater for beneficial use.

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Section 10617.
“Urban water supplier” means a supplier, either publicly or privately owned, providing water for municipal purposes either directly or indirectly to more than 3,000 customers or supplying more than 3,000 acre-feet of water annually. An urban water supplier includes a supplier or contractor for water, regardless of the basis of right, which distributes or sells for ultimate resale to customers. This part applies only to water supplied from public water systems subject to Chapter 4 (commencing with Section 116275) of Part 12 of Division 104 of the Health and Safety Code.

Section 10617.5.
“Water shortage contingency plan” means a document that incorporates the provisions detailed in subdivision (a) of Section 10632 and is subsequently adopted by an urban water supplier pursuant to this article.

Section 10618.
“Water supply and demand assessment” means a method that looks at current year and one or more dry year supplies and demands for determining water shortage risks, as described in Section 10632.1.

Chapter 3. Urban Water Management Plans
Article 1. General Provisions, Sections 10620–10621
Section 10620.
(a) Every urban water supplier shall prepare and adopt an urban water management plan in the manner set forth in Article 3 (commencing with Section 10640).
(b) Every person that becomes an urban water supplier shall adopt an urban water management plan within one year after it has become an urban water supplier.
(c) An urban water supplier indirectly providing water shall not include planning elements in its water management plan as provided in Article 2 (commencing with Section 10630) that would be applicable to urban water suppliers or public agencies directly providing water, or to their customers, without the consent of those suppliers or public agencies. (d)
(1) An urban water supplier may satisfy the requirements of this part by participation in areawide, regional, watershed, or basinwide urban water ATTACHMENT 3

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management planning where those plans will reduce preparation costs and contribute to the achievement of conservation, efficient water use, and improved local drought resilience.
(2) Notwithstanding paragraph (1), each urban water supplier shall develop its own water shortage contingency plan, but an urban water supplier may incorporate, collaborate, and otherwise share information with other urban water suppliers or other governing entities participating in an areawide, regional, watershed, or basinwide urban water management plan, an agricultural management plan, or groundwater sustainability plan development.
(3) Each urban water supplier shall coordinate the preparation of its plan with other appropriate agencies in the area, including other water suppliers that share a common source, water management agencies, and relevant public agencies, to the extent practicable.
(e) The urban water supplier may prepare the plan with its own staff, by contract, or in cooperation with other governmental agencies.
(f) An urban water supplier shall describe in the plan water management tools and options used by that entity that will maximize resources and minimize the need to import water from other regions.

Section 10621.
(a) Each urban water supplier shall update its plan at least once every five years on or before July 1, in years ending in six and one, incorporating updated and new information from the five years preceding each update. (b) Every urban water supplier required to prepare a plan pursuant to this part shall, at least 60 days before the public hearing on the plan required by Section 10642, notify any city or county within which the supplier provides water supplies that the urban water supplier will be reviewing the plan and considering amendments or changes to the plan.

The urban water supplier may consult with, and obtain comments from, any city or county that receives notice pursuant to this subdivision. (c) An urban water supplier regulated by the Public Utilities Commission shall include its most recent plan and water shortage contingency plan as part of the supplier’s general rate case filings.
(d) The amendments to, or changes in, the plan shall be adopted and filed in the manner set forth in Article 3 (commencing with Section 10640). (e) Each urban water supplier shall update and submit its 2015 plan to the department by July 1, 2016.

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(f) Each urban water supplier shall update and submit its 2020 plan to the department by July 1, 2021.

Article 2. Contents of Plans, Sections 10630–10634
Section 10630.

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

Section 10630.5.

Each plan shall include a simple lay description of how much water the agency has on a reliable basis, how much it needs for the foreseeable future, what the agency’s strategy is for meeting its water needs, the challenges facing the agency, and any other information necessary to provide a general understanding of the agency’s plan.

Section 10631.

A plan shall be adopted in accordance with this chapter that shall do all of the following:
(a) Describe the service area of the supplier, including current and projected population, climate, and other social, economic, and demographic factors affecting the supplier’s water management planning. The projected population estimates shall be based upon data from the state, regional, or local service agency population projections within the service area of the urban water supplier and shall be in five-year increments to 20 years or as far as data is available. The description shall include the current and projected land uses within the existing or anticipated service area affecting the supplier’s water management planning. Urban water suppliers shall coordinate with local or regional land use authorities to determine the most appropriate land use information, including, where appropriate, land use information obtained from local or regional land use authorities, as developed pursuant to Article 5 (commencing with Section 65300) of Chapter 3 of Division 1 of Title 7 of the Government Code.
(b) Identify and quantify, to the extent practicable, the existing and planned sources of water available to the supplier over the same five-year increments described in subdivision (a), providing supporting and related information, including all of the following:
(1) A detailed discussion of anticipated supply availability under a normal water year, single dry year, and droughts lasting at least five years, as well as more frequent and severe periods of drought, as described in the ATTACHMENT 3

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drought risk assessment. For each source of water supply, consider any information pertinent to the reliability analysis conducted pursuant to Section 10635, including changes in supply due to climate change. (2) When multiple sources of water supply are identified, a description of the management of each supply in correlation with the other identified supplies.
(3) For any planned sources of water supply, a description of the measures that are being undertaken to acquire and develop those water supplies. (4) If groundwater is identified as an existing or planned source of water available to the supplier, all of the following information:
(A) The current version of any groundwater sustainability plan or alternative adopted pursuant to Part 2.74 (commencing with Section 10720), any groundwater management plan adopted by the urban water supplier, including plans adopted pursuant to Part 2.75 (commencing with Section 10750), or any other specific
authorization for groundwater management for basins underlying the urban water supplier’s service area.
(B) A description of any groundwater basin or basins from which the urban water supplier pumps groundwater.
(C) For basins that a court or the board has adjudicated the rights to pump groundwater, a copy of the order or decree adopted by the court or the board and a description of the amount of groundwater the urban water supplier has the legal right to pump under the order or decree. For a basin that has not been adjudicated, information as to whether the department has identified the basin as a high- or medium-priority basin in the most current official departmental bulletin that characterizes the condition of the groundwater basin, and a detailed description of the efforts being undertaken by the urban water supplier to coordinate with groundwater sustainability agencies or groundwater management agencies listed in subdivision (c) of Section 10723 to maintain or achieve sustainable groundwater conditions in accordance with a groundwater sustainability plan or alternative adopted pursuant to Part 2.74 (commencing with Section 10720).
(D) A detailed description and analysis of the location, amount, and sufficiency of groundwater pumped by the urban water supplier for the past five years. The description and analysis shall be based on information that is reasonably available, including, but not limited to, historic use records.
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supplier. The description and analysis shall be based on information that is reasonably available, including, but not limited to, historic use records.
(c) Describe the opportunities for exchanges or transfers of water on a short-term or long-term basis.
(d)
(1) For an urban retail water supplier, quantify, to the extent records are available, past and current water use, over the same five-year increments described in subdivision (a), and projected water use, based upon information developed pursuant to subdivision (a), identifying the uses among water use sectors, including, but not necessarily limited to, all of the following:
(A) Single-family residential.
(B) Multifamily.
(C) Commercial.
(D) Industrial.
(E) Institutional and governmental.
(F) Landscape.
(G) Sales to other agencies.
(H) Saline water intrusion barriers, groundwater recharge, or conjunctive use, or any combination thereof.
(I) Agricultural.
(J) Distribution system water loss.
(2) The water use projections shall be in the same five-year increments described in subdivision (a).
(3)
(A) The distribution system water loss shall be quantified for each of the five years preceding the plan update, in accordance with rules adopted pursuant to Section 10608.34.
(B) The distribution system water loss quantification shall be reported in accordance with a worksheet approved or developed by the department through a public process. The water loss quantification worksheet shall be based on the water system balance methodology developed by the American Water Works Association.
(C) In the plan due July 1, 2021, and in each update thereafter, data shall be included to show whether the urban retail water supplier met ATTACHMENT 3

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the distribution loss standards enacted by the board pursuant to Section 10608.34.
(4)
(A) Water use projections, where available, shall display and account for the water savings estimated to result from adopted codes, standards, ordinances, or transportation and land use plans identified by the urban water supplier, as applicable to the service area. (B) To the extent that an urban water supplier reports the information described in subparagraph (A), an urban water supplier shall do both of the following:
(i) Provide citations of the various codes, standards, ordinances, or transportation and land use plans utilized in making the projections.
(ii) Indicate the extent that the water use projections consider savings from codes, standards, ordinances, or transportation and land use plans. Water use projections that do not account for these water savings shall be noted of that fact.
(a) Provide a description of the supplier’s water demand management measures.

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

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(2) For an urban wholesale water supplier, as defined in Section 10608.12, a narrative description of the items in clauses (ii), (iv), (vi), and (vii) of subparagraph (B) of paragraph (1), and a narrative description of its distribution system asset management and wholesale supplier assistance programs.
(f) Include a description of all water supply projects and water supply programs that may be undertaken by the urban water supplier to meet the total projected water use, as established pursuant to subdivision (a) of Section 10635. The urban water supplier shall include a detailed description of expected future projects and programs that the urban water supplier may implement to increase the amount of the water supply available to the urban water supplier in normal and single-dry water years and for a period of drought lasting five consecutive water years. The description shall identify specific projects and include a description of the increase in water supply that is expected to be available from each project. The description shall include an estimate with regard to the implementation timeline for each project or program.
(g) Describe the opportunities for development of desalinated water, including, but not limited to, ocean water, brackish water, and groundwater, as a long-term supply.
(h) An urban water supplier that relies upon a wholesale agency for a source of water shall provide the wholesale agency with water use projections from that agency for that source of water in five-year increments to 20 years or as far as data is available. The wholesale agency shall provide information to the urban water supplier for inclusion in the urban water supplier’s plan that identifies and quantifies, to the extent practicable, the existing and planned sources of water as required by subdivision (b), available from the wholesale agency to the urban water supplier over the same five- year increments, and during various water-year types in accordance with subdivision (f). An urban water supplier may rely upon water supply information provided by the wholesale agency in fulfilling the plan informational requirements of subdivisions (b) and (f).

Section 10631.1.
(a) The water use projections required by Section 10631 shall include projected water use for single-family and multifamily residential housing needed for lower income households, as defined in Section 50079.5 of the Health and Safety Code, as identified in the housing element of any city, county, or city and county in the service area of the supplier.
(b) It is the intent of the Legislature that the identification of projected water use for single-family and multifamily residential housing for lower income households will assist a supplier in complying with the requirement under ATTACHMENT 3

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Section 65589.7 of the Government Code to grant a priority for the provision of service to housing units affordable to lower income households.

Section 10631.2.
(a) In addition to the requirements of Section 10631, an urban water management plan shall include any of the following information that the urban water supplier can readily obtain:
(1) An estimate of the amount of energy used to extract or divert water supplies.
(2) An estimate of the amount of energy used to convey water supplies to the water treatment plants or distribution systems.
(3) An estimate of the amount of energy used to treat water supplies. (4) An estimate of the amount of energy used to distribute water supplies through its distribution systems.
(5) An estimate of the amount of energy used for treated water supplies in comparison to the amount used for nontreated water supplies. (6) An estimate of the amount of energy used to place water into or withdraw from storage.
(7) Any other energy-related information the urban water supplier deems appropriate.
(b) The department shall include in its guidance for the preparation of urban water management plans a methodology for the voluntary calculation or estimation of the energy intensity of urban water systems. The department may consider studies and calculations conducted by the Public Utilities Commission in developing the methodology.
(c) The Legislature finds and declares that energy use is only one factor in water supply planning and shall not be considered independently of other factors.

Section 10632.
(a) Every urban water supplier shall prepare and adopt a water shortage contingency plan as part of its urban water management plan that consists of each of the following elements:
(1) The analysis of water supply reliability conducted pursuant to Section 10635.
(2) The procedures used in conducting an annual water supply and demand assessment that include, at a minimum, both of the following:
(A) The written decision making process that an urban water supplier will use each year to determine its water supply reliability.

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(B) The key data inputs and assessment methodology used to evaluate the urban water supplier’s water supply reliability for the current year and one dry year, including all of the following:
(i) Current year unconstrained demand, considering weather, growth, and other influencing factors, such as policies to manage current supplies to meet demand objectives in future years, as applicable.
(ii) Current year available supply, considering hydrological and regulatory conditions in the current year and one dry year. The annual supply and demand assessment may consider more than one dry year solely at the discretion of the urban water supplier. (iii) Existing infrastructure capabilities and plausible constraints. (iv) A defined set of locally applicable evaluation criteria that are consistently relied upon for each annual water supply and demand assessment.
(v) A description and quantification of each source of water supply. (3)
(A) Six standard water shortage levels corresponding to progressive ranges of up to 10, 20, 30, 40, and 50 percent shortages and greater than 50 percent shortage. Urban water suppliers shall define these shortage levels based on the suppliers’ water supply conditions, including percentage reductions in water supply, changes in groundwater levels, changes in surface elevation or level of subsidence, or other changes in hydrological or other local conditions indicative of the water supply available for use. Shortage levels shall also apply to catastrophic interruption of water supplies, including, but not limited to, a regional power outage, an earthquake, and other potential emergency events.
(B) An urban water supplier with an existing water shortage contingency plan that uses different water shortage levels may comply with the requirement in subparagraph (A) by developing and including a cross- reference relating its existing categories to the six standard water shortage levels.
(4) Shortage response actions that align with the defined shortage levels and include, at a minimum, all of the following:
(A) Locally appropriate supply augmentation actions.
(B) Locally appropriate demand reduction actions to adequately respond to shortages.
(C) Locally appropriate operational changes.

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(D) Additional, mandatory prohibitions against specific water use practices that are in addition to state- mandated prohibitions and appropriate to the local conditions.
(E) For each action, an estimate of the extent to which the gap between supplies and demand will be reduced by implementation of the action.
(5) Communication protocols and procedures to inform customers, the public, interested parties, and local, regional, and state governments, regarding, at a minimum, all of the following:
(A) Any current or predicted shortages as determined by the annual water supply and demand assessment described pursuant to Section 10632.1.
(B) Any shortage response actions triggered or anticipated to be triggered by the annual water supply and demand assessment described pursuant to Section 10632.1.
(C) Any other relevant communications.
(6) For an urban retail water supplier, customer compliance, enforcement, appeal, and exemption procedures for triggered shortage response actions as determined pursuant to Section 10632.2.
(7)
(A) A description of the legal authorities that empower the urban water supplier to implement and enforce its shortage response actions specified in paragraph (4) that may include, but are not limited to, statutory authorities, ordinances, resolutions, and contract provisions.
(B) A statement that an urban water supplier shall declare a water shortage emergency in accordance with Chapter 3 (commencing with Section 350) of Division 1.
(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.
(8) A description of the financial consequences of, and responses for, drought conditions, including, but not limited to, all of the following:
(A) A description of potential revenue reductions and expense increases associated with activated shortage response actions described in paragraph (4).

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(B) A description of mitigation actions needed to address revenue reductions and expense increases associated with activated shortage response actions described in paragraph (4).
(C) A description of the cost of compliance with Chapter 3.3 (commencing with Section 365) of Division 1.
(9) For an urban retail water supplier, monitoring and reporting requirements and procedures that ensure appropriate data is collected, tracked, and analyzed for purposes of monitoring customer compliance and to meet state reporting requirements.
(10) Reevaluation and improvement procedures for systematically monitoring and evaluating the functionality of the water shortage contingency plan in order to ensure shortage risk tolerance is adequate and appropriate water shortage mitigation strategies are implemented as needed. (b) 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. (c) The urban water supplier shall make available the water shortage contingency plan prepared pursuant to this article to its customers and any city or county within which it provides water supplies no later than 30 days after adoption of the water shortage contingency plan.

Section 10632.1.

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

Section 10632.2.

An urban water supplier shall follow, where feasible and appropriate, the prescribed procedures and implement determined shortage response actions in its water shortage contingency plan, as identified in subdivision (a) of Section 10632, or reasonable alternative actions, provided that descriptions of the alternative actions are submitted with the annual water shortage assessment report pursuant to Section 10632.1. Nothing in this section prohibits an urban water supplier from ATTACHMENT 3

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taking actions not specified in its water shortage contingency plan, if needed, without having to formally amend its urban water management plan or water shortage contingency plan.

Section 10632.3.

It is the intent of the Legislature that, upon proclamation by the Governor of a state of emergency under the California Emergency Services Act (Chapter 7 (commencing with Section 8550) of Division 1 of Title 2 of the Government Code) based on drought conditions, the board defer to implementation of locally adopted water shortage contingency plans to the extent practicable.

Section 10632.5.
(a) In addition to the requirements of paragraph (3) of subdivision 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.

Section 10633.

The plan shall provide, to the extent available, information on recycled water and its potential for use as a water source in the service area of the urban water supplier. The preparation of the plan shall be coordinated with local water, wastewater, groundwater, and planning agencies that operate within the supplier’s service area, and shall include all of the following:
(a) A description of the wastewater collection and treatment systems in the supplier’s service area, including a quantification of the amount of wastewater collected and treated and the methods of wastewater disposal. (b) A description of the quantity of treated wastewater that meets recycled water standards, is being discharged, and is otherwise available for use in a recycled water project.
(c) A description of the recycled water currently being used in the supplier’s service area, including, but not limited to, the type, place, and quantity of use.

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(d) A description and quantification of the potential uses of recycled water, including, but not limited to, agricultural irrigation, landscape irrigation, wildlife habitat enhancement, wetlands, industrial reuse, groundwater recharge, indirect potable reuse, and other appropriate uses, and a determination with regard to the technical and economic feasibility of serving those uses. (e) The projected use of recycled water within the supplier’s service area at the end of 5, 10, 15, and 20 years, and a description of the actual use of recycled water in comparison to uses previously projected pursuant to this subdivision. (f) A description of actions, including financial incentives, which may be taken to encourage the use of recycled water, and the projected results of these actions in terms of acre-feet of recycled water used per year.
(g) A plan for optimizing the use of recycled water in the supplier’s service area, including actions to facilitate the installation of dual distribution systems, to promote recirculating uses, to facilitate the increased use of treated wastewater that meets recycled water standards, and to overcome any obstacles to achieving that increased use.

Section 10634.

The plan shall include information, to the extent practicable, relating to the quality of existing sources of water available to the supplier over the same five-year increments as described in subdivision (a) of Section 10631, and the manner in which water quality affects water management strategies and supply reliability.

Article 2.5. Water Service Reliability, Section 10635
Section 10635.
(a) Every urban water supplier shall include, as part of its urban water management plan, an assessment of the reliability of its water service to its customers during normal, dry, and multiple dry water years. This water supply and demand assessment shall compare the total water supply sources available to the water supplier with the long-term total projected water use over the next 20 years, in five-year increments, for a normal water year, a single dry water year, and a drought lasting five consecutive water years. The water service reliability assessment shall be based upon the information compiled pursuant to Section 10631, including available data from state, regional, or local agency population projections within the service area of the urban water supplier.
(b) Every urban water supplier shall include, as part of its urban water management plan, a drought risk assessment for its water service to its customers as part of information considered in developing the demand management measures and water supply projects and programs to be included ATTACHMENT 3

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in the urban water management plan. The urban water supplier may conduct an interim update or updates to this drought risk assessment within the five- year cycle of its urban water management plan update. The drought risk assessment shall include each of the following:
(1) A description of the data, methodology, and basis for one or more supply shortage conditions that are necessary to conduct a drought risk assessment for a drought period that lasts five consecutive water years, starting from the year following when the assessment is conducted. (2) A determination of the reliability of each source of supply under a variety of water shortage conditions. This may include a determination that a particular source of water supply is fully reliable under most, if not all, conditions.
(3) A comparison of the total water supply sources available to the water supplier with the total projected water use for the drought period. (4) Considerations of the historical drought hydrology, plausible changes on projected supplies and demands under climate change conditions, anticipated regulatory changes, and other locally applicable criteria. (c) The urban water supplier shall provide that portion of its urban water management plan prepared pursuant to this article to any city or county within which it provides water supplies no later than 60 days after the submission of its urban water management plan.
(d) Nothing in this article is intended to create a right or entitlement to water service or any specific level of water service.
(e) Nothing in this article is intended to change existing law concerning an urban water supplier’s obligation to provide water service to its existing customers or to any potential future customers.

Article 3. Adoption and Implementation of Plans,
Sections 10640–10645
Section 10640.
(a) Every urban water supplier required to prepare a plan pursuant to this part shall prepare its plan pursuant to Article 2 (commencing with Section 10630).

The supplier shall likewise periodically review the plan as required by Section 10621, and any amendments or changes required as a result of that review shall be adopted pursuant to this article.
(b) Every urban water supplier required to prepare a water shortage contingency plan shall prepare a water shortage contingency plan pursuant to Section 10632. The supplier shall likewise periodically review the water shortage contingency plan as required by paragraph (10) of subdivision (a) of ATTACHMENT 3

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Section 10632 and any amendments or changes required as a result of that review shall be adopted pursuant to this article.

Section 10641.

An urban water supplier required to prepare a plan or a water shortage contingency plan may consult with, and obtain comments from, any public agency or state agency or any person who has special expertise with respect to water demand management methods and techniques.

Section 10642.

Each urban water supplier shall encourage the active involvement of diverse social, cultural, and economic elements of the population within the service area prior to and during the preparation of both the plan and the water shortage contingency plan. Prior to adopting either, the urban water supplier shall make both the plan and the water shortage contingency plan available for public inspection and shall hold a public hearing or hearings thereon. Prior to any of these hearings, notice of the time and place of the hearing shall be published within the jurisdiction of the publicly owned water supplier pursuant to Section 6066 of the Government Code.

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

Section 10643.

An urban water supplier shall implement its plan adopted pursuant to this chapter in accordance with the schedule set forth in its plan.

Section 10644.
(a)
(1) An urban water supplier shall submit to the department, the California State Library, and any city or county within which the supplier provides water supplies a copy of its plan no later than 30 days after adoption.

Copies of amendments or changes to the plans shall be submitted to the department, the California State Library, and any city or county within which the supplier provides water supplies within 30 days after adoption. (2) The plan, or amendments to the plan, submitted to the department pursuant to paragraph (1) shall be submitted electronically and shall ATTACHMENT 3

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include any standardized forms, tables, or displays specified by the department.
(b) If an urban water supplier revises its water shortage contingency plan, the supplier shall submit to the department a copy of its water shortage contingency plan prepared pursuant to subdivision (a) of Section 10632 no later than 30 days after adoption, in accordance with protocols for submission and using electronic reporting tools developed by the department. (c)
(1)
(A) Notwithstanding Section 10231.5 of the Government Code, the department shall prepare and submit to the Legislature, on or before July 1, in the years ending in seven and two, a report summarizing the status of the plans and water shortage contingency plans adopted pursuant to this part. The report prepared by the department shall identify the exemplary elements of the individual plans and water shortage contingency plans. The department shall provide a copy of the report to each urban water supplier that has submitted its plan and water shortage contingency plan to the department. The department shall also prepare reports and provide data for any legislative hearings designed to consider the effectiveness of plans and water shortage contingency plans submitted pursuant to this part.
(B) The department shall prepare and submit to the board, on or before September 30 of each year, a report summarizing the submitted water supply and demand assessment results along with appropriate reported water shortage conditions and the regional and statewide analysis of water supply conditions developed by the department. As part of the report, the department shall provide a summary and, as appropriate, urban water supplier specific information regarding various shortage response actions implemented as a result of annual supplier-specific water supply and demand assessments performed pursuant to Section 10632.1.
(C) The department shall submit the report to the Legislature for the 2015 plans by July 1, 2017, and the report to the Legislature for the 2020 plans and water shortage contingency plans by July 1, 2022. (2) A report to be submitted pursuant to subparagraph (A) of paragraph (1) shall be submitted in compliance with Section 9795 of the Government Code.
(d) The department shall make available to the public the standard the department will use to identify exemplary water demand management measures.

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Section 10645.
(a) Not later than 30 days after filing a copy of its plan with the department, the urban water supplier and the department shall make the plan available for public review during normal business hours.
(b) Not later than 30 days after filing a copy of its water shortage contingency plan with the department, the urban water supplier and the department shall make the plan available for public review during normal business hours.

Chapter 4. Miscellaneous Provisions, Sections 10650–
10657
Section 10650.

Any actions or proceedings, other than actions by the board, to attack, review, set aside, void, or annul the acts or decisions of an urban water supplier on the grounds of noncompliance with this part shall be commenced as follows:
(a) An action or proceeding alleging failure to adopt a plan or a water shortage contingency plan shall be commenced within 18 months after that adoption is required by this part.
(b) Any action or proceeding alleging that a plan or water shortage contingency plan, or action taken pursuant to either, does not comply with this part shall be commenced within 90 days after filing of the plan or water shortage contingency plan or an amendment to either pursuant to Section 10644 or the taking of that action.

Section 10651.

In any action or proceeding to attack, review, set aside, void, or annul a plan or a water shortage contingency plan, or an action taken pursuant to either by an urban water supplier on the grounds of noncompliance with this part, the inquiry shall extend only to whether there was a prejudicial abuse of discretion. Abuse of discretion is established if the supplier has not proceeded in a manner required by law or if the action by the water supplier is not supported by substantial evidence.

Section 10652.

The California Environmental Quality Act (Division 13 (commencing with Section 21000) of the Public Resources Code) does not apply to the preparation and adoption of plans pursuant to this part or to the implementation of actions taken pursuant to Section 10632. Nothing in this part shall be interpreted as exempting from the California Environmental Quality Act any project that would significantly affect water supplies for fish and wildlife, or any project for implementation of the ATTACHMENT 3

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plan, other than projects implementing Section 10632, or any project for expanded or additional water supplies.

Section 10653.

The adoption of a plan shall satisfy any requirements of state law, regulation, or order, including those of the board and the Public Utilities Commission, for the preparation of water management plans, water shortage contingency plans, or conservation plans; provided, that if the board or the Public Utilities Commission requires additional information concerning water conservation, drought response measures, or financial conditions to implement its existing authority, nothing in this part shall be deemed to limit the board or the commission in obtaining that information. The requirements of this part shall be satisfied by any urban water demand management plan that complies with analogous federal laws or regulations after the effective date of this part, and which substantially meets the requirements of this part, or by any existing urban water management plan which includes the contents of a plan required under this part.

Section 10654.

An urban water supplier may recover in its rates the costs incurred in preparing its urban water management plan, its drought risk assessment, its water supply and demand assessment, and its water shortage contingency plan and implementing the reasonable water conservation measures included in either of the plans.

Section 10655.

If any provision of this part or the application thereof to any person or circumstances is held invalid, that invalidity shall not affect other provisions or applications of this part which can be given effect without the invalid provision or application thereof, and to this end the provisions of this part are severable.

Section 10656.

An urban water supplier is not eligible for a water grant or loan awarded or administered by the state unless the urban water supplier complies with this part.

Section 10657.

The department may adopt regulations regarding the definitions of water, water use, and reporting periods, and may adopt any other regulations deemed necessary or desirable to implement this part. In developing regulations pursuant to this section, the department shall solicit broad public participation from stakeholders and other interested persons.

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Demonstration of Reduced Delta Reliance

Appendix B
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JOINTLY PREPARED BY

fe

City of Napa
Reduced Reliance on the Delta

DRAFT PLAN | MAY 2026
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Table of Contents

1.0 Sacramento-San Joaquin Delta Reform Act of 2009 ................................ ................................ ....... 1

2.0 Reduced Reliance Analysis ................................ ................................ ................................ ............ 2

3.0 Expected Outcomes for Reduced Reliance on the Delta ................................ ................................ . 4

LIST OF TABLES
Table 1. Calculation of Water Use Efficiency
(DWR Table C-1) ....................................................................................................................... 3 Table 2. Calculation of Service Area Water Demands Without Water Use Efficiency (DWR Table C-2) ....................................................................................................................... 3 Table 3. Calculation of Supplies Contributing to Regional Self-Reliance (DWR Table C-3) ....................................................................................................................... 3 Table 4. Calculation of Reliance on Water Supplies from the Delta Watershed (DWR Table C-4) ....................................................................................................................... 4

LIST OF ACRONYMS AND ABBREVIATIONS
City City of Napa
Delta Sacramento-San Joaquin Delta
DWR California Department of Water Resources
DWR Guidebook Urban Water Management Plan Guidebook 2025 NapaSan Napa Sanitation District
NCFCWCD Napa County Flood Control & Water Conservation District SWP State Water Project
UWMP Urban Water Management Plan
WR P1 Delta Plan Policy WR P1

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City of Napa
Reduced Reliance on the Delta
The purpose of this document is to demonstrate compliance with the Sacramento -San Joaquin Delta Reform Act of 2009, which is described below, followed by an analysis of the City of Napa’s (City) reduced reliance in accordance with State protocols and expected outcomes for reduced reliance on the Delta.

1.0 SACRAMENTO-SAN JOAQUIN DELTA REFORM ACT OF 2009
Under the Sacramento-San Joaquin Delta Reform Act of 2009, State and local public agencies proposing a “covered action ” in the Sacramento-San Joaquin Delta (Delta) must submit a written certification of consistency to the Delta Stewardship Council as to whether the covered action is consistent with applicable Delta Plan policies. Covered actions include a multi-year water transfer, conveyance facility, or new diversion that involves transferring water through, exporting water from, or using water in the Delta.

Anyone may appeal a certification of consistency, and if the Delta Stewardship Council grants the appeal, the covered action may not b e implemented until the agency proposing the covered action submits a revised certification of consistency, and either no appeal is filed, or the Delta Stewardship Council denies the subsequent appeal.

An urban water supplier that anticipates participating in or receiving water from a proposed covered action is required to provide information in their Urban Water Management Plans (UWMPs), starting with their 2015 UWMP, that can then be used in the covered action process to demonstrate consistency with Delta Plan Policy WR P1, Reduce Reliance on the Delta Through Improved Regional Water Self -Reliance (WR P1).

WR P1 details the requirements for a covered action to demonstrate consistency with reduced reliance on the Delta and improved regional self-reliance. WR P1 subsection (a) states that:
(a) Water shall not be exported from, transferred through, or used in the Delta if all of the following apply:
(1) One or more water suppliers that would receive water as a result of the export, transfer, or use have failed to adequately contribute to reduced reliance on the Delta and improved regional self -reliance consistent with all of the requirements listed in paragraph (1) of subsection (c); (2) That failure has significantly caused the need for the export, transfer, or use; and (3) The export, transfer, or use would have a significant adverse environmental impact in the Delta.

WR P1 subsection (c)(1) further defines what adequately contributing to reduced reliance on the Delta means in terms of (a)(1) above.
(c)(1) Water suppliers that have done all the following are contributing to reduced reliance on the Delta and improved regional self-reliance and are therefore consistent with this policy:
(A) Completed a current Urban or Agricultural Water Management Plan (Plan) which has been reviewed by the California Department of Water Resources for compliance with the applicable requirements of Water Code Division 6, Parts 2.55, 2.6, and 2.8;
(B) Identified, evaluated, and commenced implementation, consistent with the implementation schedule set forth in the Plan, of all programs and projects included in the Plan that are locally cost effective and technically feasible which reduce reliance on the Delta; and (C) Included in the Plan, commencing in 2015, the expected outcome for measurable reduction in Delta reliance and improvement in regional self-reliance. The expected outcome for measurable reduction in Delta reliance and improvement in regional self-reliance shall be reported in the Plan as the reduction in the amount of water used, or in the percentage of water used, from the Delta watershed. For the purposes of reporting, water efficiency is considered a new source of water supply, consistent with Water Code section 1011(a).

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Reduced Reliance on the Delta

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The analysis and documentation provided below include all of the elements described in WR P1(c)(1) that need to be included in a water supplier’s UWMP to support a certification of consistency for a future covered action.

The inclusion of this document as an appendix in the 2015, 2020, and 2025 UWMPs fulfills the requirements of WR P1 subsection (c)(1) Paragraph A.

Future projects under evaluation as described in Chapter 6 and the Demand Management Measures described in Chapter 9 of the City’s 2025 UWMP fulfill the requirements of WR P1 subsection (c)(1) Paragraph B.

2.0 REDUCED RELIANCE ANALYSIS
The methodology used to determine the City’s reduced Delta reliance and improved regional self-reliance is consistent with the approach detailed by the California Department of Water Resources (DWR) in Appendix C of their “Urban Water Management Plan Guidebook 2025” (DWR Guidebook), issued in January 2026. The following analysis uses narrative justifications to account for supplies and document specific data sources. All data represent average or normal water year conditions and were obtained from the 2025 UWMP, previously adopted UWMPs, and discussions with the City. The analysis was conducted at the retail level, focusing on the City’s demands and available supplies ( i.e., local surface water and imported water through the State Water Project (SWP)).

Table 1 through Table 4 present the analysis of the City’s reduced Delta reliance using DWR’s spreadsheet tool and fulfill the requirements of WR P1 subsection (c)(1) Paragraph C. Descriptions of the various inputs of the analysis are provided below:
• Baseline (2010) and 2015-2050 Conditions – The analysis uses a normal water year representation of 2010 as the baseline, which is consistent with the approach described in the DWR Guidebook. Data for the City’s 2010 baseline are taken from its 2010 UWMP, while actual conditions for 2015, 2020, and 2025 are based on data reported in the City’s 2015, 2020, and 2025 UWMPs, respectively. Normal year projections for 2030 through 2050 are also based on the City’s 2025 UWMP. Where historical or projected data were unavailable (e.g., actual supplies used to meet demands), the City provided that information separately. • Service Area Water Demands with Water Use Efficiency Accounted For – These values reflect the City’s actual and projected water use, including potable water demands, recycled water demands, and losses. Water the City delivers to other agencies (City of American Canyon, Town of Yountville, City of St. Helena, City of Calistoga, and California Veterans Home) and Agricultural customers is excluded.
• Non-Potable Water Demands – These values consist of recycled water demands. • Water Supplies Contributing to Regional Self-Reliance — Water Use Efficiency – This amount is calculated by DWR’s spreadsheet tool based on the City’s baseline demand, actual demands, and expected future demands. For each year, the value shown is the reduction in per capita water demand from the baseline (2010) multiplied by the actual or projected population.

ATTACHMENT 3

Reduced Reliance on the Delta

N-424-60-26-28-WP-R-424-UWMP-Appendices-DR
3 City of Napa
Last Revised: 05-18-26

— Water Recycling – Napa Sanitation District (NapaSan) provides recycled water to customers within the City’s drinking water service area. Recycled water contributes to regional self-reliance by reducing the demand for potable water. • Water Supplies from the Delta Watershed
— CVP/SWP Contract Supplies – The City sub-contracts with the Napa County Flood Control & Water Conservation District (NCFCWCD) for imported surface water from the SWP. Beginning in 2000, the City increased its SWP entitlement through transfer agreements with the Kern County Water Agency, the City of St. Helena, and the Town of Yountville.

Table 1. Calculation of Water Use Efficiency (DWR Table C-1)

Table 2. Calculation of Service Area Water Demands Without Water Use Efficiency (DWR Table C-2)

Table 3. Calculation of Supplies Contributing to Regional Self-Reliance (DWR Table C-3)

Service Area Water Use Efficiency Demands
(Acre-Feet)
Baseline
(2010) 2015 2020 2025 2030 2035 2040 2045 2050
(Optional)
Service Area Water Demands with Water Use Efficiency Accounted For 13,730 11,694 13,900 11,856 13,210 13,860 13,910 14,310 14,610 Non-Potable Water Demands 288 437 568 453 600 800 800 800 800 Potable Service Area Demands with Water Use Efficiency Accounted For 13,442 11,257 13,332 11,403 12,610 13,060 13,110 13,510 13,810 Total Service Area Population Baseline
(2010) 2015 2020 2025 2030 2035 2040 2045 2050
(Optional)
Service Area Population 86,743 87,615 86,906 85,366 88,946 92,526 96,106 99,686 103,266 Water Use Efficiency Since Baseline
(Acre-Feet)
Baseline
(2010) 2015 2020 2025 2030 2035 2040 2045 2050
(Optional)
Per Capita Water Use (GPCD) 138 115 137 119 127 126 122 121 119 Change in Per Capita Water Use from Baseline (GPCD) (24) (1) (19) (12) (12) (17) (17) (19) Estimated Water Use Efficiency Since Baseline 2,320 135 1,826 1,173 1,278 1,783 1,938 2,192 Total Service Area Water Demands
(Acre-Feet)
Baseline
(2010) 2015 2020 2025 2030 2035 2040 2045 2050
(Optional)
Service Area Water Demands with Water Use Efficiency Accounted For 13,730 11,694 13,900 11,856 13,210 13,860 13,910 14,310 14,610 Reported Water Use Efficiency or Estimated Water Use Efficiency Since Baseline 2,320 135 1,826 1,173 1,278 1,783 1,938 2,192 Service Area Water Demands without Water Use Efficiency Accounted For 13,730 14,014 14,035 13,682 14,383 15,138 15,693 16,248 16,802 Water Supplies Contributing to Regional Self-Reliance
(Acre-Feet)
Baseline
(2010) 2015 2020 2025 2030 2035 2040 2045 2050
(Optional)
Water Use Efficiency - 2,320 135 1,826 1,173 1,278 1,783 1,938 2,192 Water Recycling 288 437 568 453 600 800 800 800 800 Stormwater Capture and Use
Advanced Water Technologies
Conjunctive Use Projects
Local and Regional Water Supply and Storage Projects 4,260 3,983 4,998 8,885 5,044 5,485 5,768 6,215 6,629 Other Programs and Projects the Contribute to Regional Self-Reliance Water Supplies Contributing to Regional Self-Reliance 4,548 6,740 5,701 11,164 6,817 7,563 8,351 8,952 9,621 Service Area Water Demands without Water Use Efficiency (Acre-Feet)
Baseline
(2010) 2015 2020 2025 2030 2035 2040 2045 2050
(Optional)
Service Area Water Demands without Water Use Efficiency Accounted For 13,730 14,014 14,035 13,682 14,383 15,138 15,693 16,248 16,802 Change in Regional Self Reliance
(Acre-Feet)
Baseline
(2010) 2015 2020 2025 2030 2035 2040 2045 2050
(Optional)
Water Supplies Contributing to Regional Self-Reliance 4,548 6,740 5,701 11,164 6,817 7,563 8,351 8,952 9,621 Change in Water Supplies Contributing to Regional Self-Reliance 2,192 1,153 6,616 2,269 3,015 3,803 4,404 5,073 Percent Change in Regional Self Reliance
(As Percent of Demand w/out WUE)
Baseline
(2010) 2015 2020 2025 2030 2035 2040 2045 2050
(Optional)
Percent of Water Supplies Contributing to Regional Self-Reliance 33.1% 48.1% 40.6% 81.6% 47.4% 50.0% 53.2% 55.1% 57.3% Change in Percent of Water Supplies Contributing to Regional Self-Reliance 15.0% 7.5% 48.5% 14.3% 16.8% 20.1% 22.0% 24.1% ATTACHMENT 3

Reduced Reliance on the Delta

N-424-60-26-28-WP-R-424-UWMP-Appendices-DR
4 City of Napa
Last Revised: 05-18-26

Table 4. Calculation of Reliance on Water Supplies from the Delta Watershed (DWR Table C-4)

3.0 EXPECTED OUTCOMES FOR REDUCED RELIANCE ON THE DELTA As stated in WR P1(c)(1)(C), commencing in 2015, UWMPs are required to include expected outcomes for measurable reduction in Delta reliance and improved regional self -reliance. WR P1 further states that those outcomes shall be reported in the UWMP as the reduction in the amount or percentage of water used from the Delta.

The following provides a summary of the near-term (2030) and long-term (2050) expected outcomes for the City’s Delta reliance and regional self -reliance based on the assumptions described in the previous section and DWR’s analysis tool. The results show that the City is measurably reducing reliance on the Delta and improving regional self-reliance, based on the percentage of the City’s water supplies from the Delta watershed.

Expected Outcomes for Regional Self-Reliance (Table 3):
• Near-term (2030) – Normal water year regional self-reliance is expected to increase by approximately 2,269 AFY from the 2010 baseline. Increased use of local and regional water supplies is a major factor, supplemented by water use efficiency and recycled water. • Long-term (2050) – Normal water year regional self-reliance is expected to increase by approximately 5,073 AFY from the 2010 baseline. Increased use of local and regional water supplies is a major factor, supplemented by water use efficiency and recycled water.

Expected Outcomes for Percent of Water Supplies from the Delta Watershed (Table 4):
• Near-term (2030) – Normal water year reliance on supplies from the Delta watershed is expected to decrease by approximately 14.3 percent relative to the 2010 baseline. • Long-term (2050) – Normal water year reliance on supplies from the Delta watershed is expected to decrease by approximately 24.1 percent relative to the 2010 baseline.

Water Supplies from the Delta Watershed
(Acre-Feet)
Baseline
(2010) 2015 2020 2025 2030 2035 2040 2045 2050
(Optional)
CVP/SWP Contract Supplies 9,182 7,274 8,334 3,326 7,566 7,575 7,342 7,295 7,181 Delta/Delta Tributary Diversions
Transfers and Exchanges
Other Water Supplies from the Delta Watershed
Total Water Supplies from the Delta Watershed 9,182 7,274 8,334 3,326 7,566 7,575 7,342 7,295 7,181 Service Area Water Demands without Water Use Efficiency (Acre-Feet)
Baseline
(2010) 2015 2020 2025 2030 2035 2040 2045 2050
(Optional)
Service Area Water Demands without Water Use Efficiency Accounted For 13,730 14,014 14,035 13,682 14,383 15,138 15,693 16,248 16,802 Change in Supplies from the Delta Watershed
(Acre-Feet)
Baseline
(2010) 2015 2020 2025 2030 2035 2040 2045 2050
(Optional)
Water Supplies from the Delta Watershed 9,182 7,274 8,334 3,326 7,566 7,575 7,342 7,295 7,181 Change in Water Supplies from the Delta Watershed (1,908) (848) (5,856) (1,616) (1,607) (1,840) (1,887) (2,001) Percent Change in Supplies from the Delta Watershed
(As a Percent of Demand w/out WUE)
Baseline
(2010) 2015 2020 2025 2030 2035 2040 2045 2050
(Optional)
Percent of Water Supplies from the Delta Watershed 66.9% 51.9% 59.4% 24.3% 52.6% 50.0% 46.8% 44.9% 42.7% Change in Percent of Water Supplies from the Delta Watershed -15.0% -7.5% -42.6% -14.3% -16.8% -20.1% -22.0% -24.1% ATTACHMENT 3

DWR 2025 Urban Water Management Plan Tables

Appendix C
ATTACHMENT 3

CA2810003 City of Napa 25,500 12,211
25,500 12,211
Submittal Table 2-1 Retail: Public Water Systems
Add additional rows as needed
NOTES: Volumes are in acre-feet (AF). Excludes 799 AF treated & wheeled to the cities of American Canyon and Calistoga, as those agencies provide the source of supply.

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:

ATTACHMENT 3

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
Napa County Flood Control and Water Conservation District (NCFCWCD) NOTES: NCFCWCD is the direct local contractor with DWR for State Water Project (SWP) supplies. In this way it acts as a wholesaler to the City, a SWP subcontractor. 2025 2030 2035 2040 2045 2050(opt)
85,366 88,946 92,526 96,106 99,686 103,266
Submittal Table 3-1 Retail: Population - Current and Projected Water Code Section 10631(a)
Population
Served
NOTES: 2025 calculated using California Department of Finance E-5 Estimates (May 2025) and persons-per-connection estimates. 2030-2050 projections use incremental 5-year increases derived from the current City of Napa General Plan.

ATTACHMENT 3

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 5,542
Multi-Family Potable 2,057
Commercial Commercial, non-City Institutional Potable 2,548 Industrial Potable 109
Institutional/Governmental City of Napa municipal only, excluding dedicated irrigation accounts Potable 29
Landscape Commercial, Industrial, Institutional
Dedicated Irrigation Meters (DIMs) Potable 455
Agricultural Potable 77
Sales/Transfers/Exchanges to other
Suppliers
City of St. Helena, Town of Yountville,
Veterans Home of California Potable 731
Other (optional) Hydrant flushing, firefighting, street cleaning (estimate) Potable 28
Distribution System Water Loss Real and Apparent Losses (estimate) Potable 635 12,211
0 12,211Total
Submittal Table 4-1 Retail: Total Uses for Potable and Non-Potable Water — Actual Water Code Section 10631(d)(1)
NOTES: The City is a drinking water provider only and does not distribute non-potable water to customers.

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)
ATTACHMENT 3

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 5,800 6,000 6,000 6,200 6,450
Multi-Family Potable 2,150 2,250 2,250 2,300 2,400
Commercial Commercial, non-City
Institutional Potable 3,050 3,225 3,300 3,500 3,500
Industrial Potable 150 175 200 200 200
Institutional/Governmental
City of Napa municipal only,
excluding dedicated irrigation
accounts
Potable 30 30 30 30 30
Landscape
Commercial, Industrial,
Institutional Dedicated Irrigation
Meters (DIMs)
Potable 400 400 400 400 400
Agricultural Potable 150 175 200 200 200
Sales/Transfers/Exchanges to other Suppliers
City of St. Helena, Town of
Yountville, California Veterans
Home
Potable 800 800 800 800 800
Other (optional) Hydrant flushing, firefighting,
street cleaning Potable 30 30 30 30 30
Distribution System Water Loss Real and Apparent Losses Potable 1,000 950 900 850 800 13,560 14,035 14,110 14,510 14,810
0 0 0 0 0
13,560 14,035 14,110 14,510 14,810
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: The City is a drinking water provider only and does not distribute non-potable water to customers.

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
ATTACHMENT 3

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 4.4
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 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.

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)
CA2810003
DWR NOTES: Suppliers will provide a link to the WUEdata submittals of their Water Loss Audit Reports.

NOTES:

Report submittal status for all five years for each Public Water System as available.

Add rows as needed
ATTACHMENT 3

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)
CA2810003 Yes 26.8
Gallons per
Service
Connection per
Day (GPSCD)
26362 660 22.4 6.3
Gallons per
Service
Connection per
Day (GPSCD)
26362 353 12.0
Submittal Table 4-6 Retail: Progress Towards 2028 Water Loss Standard Water Code Section 10631(d)(3)(C)
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
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 132 137 No 119 Yes
Submittal Table 5-1 Retail: SB X7-7 2020 Target Progress Water Code Section 10608.40
NOTES:

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?
ATTACHMENT 3

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 Pumped
Water 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) ATTACHMENT 3

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
Napa Sanitation District
(NapaSan) Metered 8,805
Napa Sanitation District WWTP
(Soscol Water Recycling
Facility), Place ID 243858
Yes
8,805
Check the box if there is no wastewater collection system.

Proceed to the next table.

NOTES: Plant influent data obtained from NapaSan engineer in May 2026.

Submittal Table 6-2 Retail: Wastewater Collected Within Service Area Water 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) Wastewater Collection Recipient of Collected Wastewater Total Wastewater Received from UWMP
Service Area in 2025:

ATTACHMENT 3

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
Napa Sanitation District
WWTP (Soscol Water
Recycling Facility), Place
ID 243858
No 2,173 2,173 Tertiary 453 Tertiary 1,720 Napa Sanitation District
WWTP (Soscol Water
Recycling Facility), Place
ID 243858
No 6,632 6,632 Secondary,
Disinfected - 23 6,162
8,805 8,805 453 1,720 6,162 0 0
Submittal Table 6-3 Retail: Wastewater Treatment and Outcomes Within UWMP Service Area Water Code Section 10633(b)
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)
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 wastewater treated and recycled water breakdown obtained from NapaSan staff in May 2026. Difference between secondary treated and discharged is evaporative loss from oxidation ponds. Table does note that 1,720 AF of recycled water was delivered to customers outside of the City's drinking water service area. As shown, 453 AF was recycled within the City's service area in 2025.

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)
ATTACHMENT 3

Volume Narrative page number
(OPTIONAL)
Agricultural irrigation Non-Potable Vineyard Irrigation 63 100 100 100 100 100 Landscape irrigation (exc golf
courses) Non-Potable Commercial and Institutional
Landscaping 221 300 500 500 500 500
Golf course irrigation Non-Potable Napa Municipal Golf Course at Kennedy Park 169 200 200 200 200 200
0 0 0 0 0 0 0
453 600 800 800 800 800 0
453 600 800 800 800 800 0 0Total
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 needed
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.

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: Because no additional golf courses exist in the City service area and agricultural (vineyard) areas are very limited, those types of recycled water use will remain steady. Commercial/institutional landscaping uses have the potential to expand based on NapaSan and City policy. 2050 (AF)2025 (AF) 2030 (AF) 2035 (AF) 2040 (AF) 2045 (AF) 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 Area Water Code Section 10633 (c),(d),(e)
Potential Recycled Water Use
Name(s) of Facility/ies Producing (Treating) the Recycled Water (OPTIONAL) : Napa Sanitation District WWTP (Soscol Water Recycling Facility) Name of Supplier Operating the Recycled Water Distribution System (OPTIONAL) : Napa Sanitation District (NapaSan) Volume of Supplemental Water Added in 2025 (OPTIONAL) :

Source of 2025 Supplemental Water (OPTIONAL) :

ATTACHMENT 3

2020 Projection
for 2025 (AF)
2025 Actual Use
(AF)
100 63
515 221
220 169
835 453
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.

Agricultural irrigation
NOTES: 2020 UWMP overestimated vineyard irrigation volumes in the Stanly Ranch area and the pace of commercial/institutional recycled water conversions in South Napa.

Total
Use Type
Drop Down list
Landscape irrigation (exc golf courses)
Golf course irrigation
Name of Action Description Expected Increase in Recycled Water Use (AF)
Vineyards in Stanly Lane area Connect remaining unconnected vineyard acreage in southwest Napa 20
Stanly Ranch Resort
Connect remaining landscape and vineyard areas as
final phases of resort/housing construction are
completed
60 Napa Pipe Complete full connection of all common area landscaping in Napa Pipe project 40
Napa State Hospital Full connection for entire facility landscape 80 South Napa Infill Connect Imola Avenue commercial landscapes 60 Gasser Infill Connect residential and commercial landscapes on former Gasser Foundation lands 60
320
320
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: Table represents scheduled or anticipated actions within City of Napa drinking water service area only.

Submittal Table 6-6 Retail: Methods to Encourage Future Recycled Water Use Water 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
2028
2029
2035
2030
2032
2034
Total (AF)
ATTACHMENT 3

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 Programs Water 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)
Supply from Storage Lake Hennessey Potable 8,885 30,500 Supply from Storage Milliken Reservoir Potable 0 2,350
Purchased or Imported Water State Water Project Potable 3,326 21,900 12,211 54,750
0 0
12,211 54,750
Submittal Table 6-8 Retail: Water Supplies — Actual
Water Code Section 10631 (b)
2025
NOTES: Total Entitlements represent the annual diversion and storage Water Rights for the two local reservoirs and the City's contractual 100% Table A allocation for the State Water Project.

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)
ATTACHMENT 3

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)
Supply from Storage Lake
Hennessey Potable 17,500 30,500 17,500 30,500 17,500 30,500 15,575 30,500 15,575 30,500 Supply from Storage Milliken
Reservoir Potable 700 2,350 700 2,350 700 2,350 623 2,350 623 2,350 Purchased or Imported Water State Water
Project Potable 11,826 21,900 11,826 21,900 11,826 21,900 10,512 21,900 10,512 21,900 30,026 54,750 30,026 54,750 30,026 54,750 26,710 54,750 26,710 54,750 0 0 0 0 0 0 0 0 0 0
30,026 54,750 30,026 54,750 30,026 54,750 26,710 54,750 26,710 54,750 Submittal Table 6-9 Retail: Water Supplies — Projected
Water 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: Reasonably Available Volumes are based on an average water year. Through 2040, State Water Project supplies are 54% of Table A (with no Carryover, Article 21, or North of Delta allocation assumed). This Table A allocation represents an average year under Existing Conditions (Adjusted Historical Hydrology) as contained in The State Water Project Draft Delivery Capability Report 2025, DWR, December 2025. 2045 and 2050 use a 48% Table A allocation based on the report's 2043 50% Level of Concern under Future Climate Change Conditions. Local reservoirs supplies are reduced 11% in 2045 and 2050 to match the climate change adjustment for the State Water Project. 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.

ATTACHMENT 3

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
13,010 - 13,010 3,171,768 - 3,171,768 748 - 748 Quantity of Self-Generated Renewable Energy
75000 kWh
Data Quality (Estimate, Metered Data, Combination of Estimates and Metered Data) Metered Data
Data Quality Narrative:

Narrative:

Volume of Water Entering Process
Energy Consumed (kWh)
Energy Intensity (kWh/vol. converted to MG)
Optional Submittal Table O-1B: Recommended Energy Reporting - SINGLE DELIVERY PRODUCT - TOTAL UTILITY APPROACH Volume of Water Entering Process includes 799 AF that the City treats and wheels to the Cities of American Canyon and Calistoga. This provides a more accurate Energy Intensity in this Total Utility Approach. Metered electricity data were tabulated for all relevant City of Napa Pacific Gas & Electric (PG&E) billings covering calendar year 2025.

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.

NOTES:

Electricity is consumed primarily at three water treatment plants and ten pump stations within the City's operational control. Pumping raw water from Lake Hennessey to the Hennessey Water Treatment Plant consumes the largest amount of energy. This is also the site of the City's solar photovoltaic system, which is capable of producing up to 600,000 kWh per year; however, the system was down for most of 2025 due to failed inverters and other needed repairs, and solar production was limited.

ATTACHMENT 3

% of Average Supply
Average Year 1922-2021 100%
Single-Dry Year 2021 60%
Consecutive Dry Years 1st Year 1987 64%
Consecutive Dry Years 2nd Year 1988 48%
Consecutive Dry Years 3rd Year 1989 48%
Consecutive Dry Years 4th Year 1990 48%
Consecutive Dry Years 5th Year 1991 48%
30,026
17,962
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)

TOTAL SUPPLIES
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.
19,230
14,355
NOTES:
14,355
14,355
14,355
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.

ATTACHMENT 3

% of Average Supply
Average Year 1922-2021 100%
Single-Dry Year 2021 66%
Consecutive Dry Years 1st Year 1987 58%
Consecutive Dry Years 2nd Year 1988 32%
Consecutive Dry Years 3rd Year 1989 32%
Consecutive Dry Years 4th Year 1990 32%
Consecutive Dry Years 5th Year 1991 32%
Optional Submittal Table 7-1 Retail: Basis of Water Year Data (Reliability Assessment)

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

Volume Available (AF)
18,200
12,000
10,640
5,765
5,765
5,765
5,765
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.

NOTES: Multiple versions of DWR Table 7-1 are used; this table is for Local Surface Water supplies only (Lake Hennessey and Milliken Reservoir) based on existing conditions through 2040. Future (2045 and 2050) conditions are assumed to be reduced by 11% to match climate change impacts assumed for the SWP.

ATTACHMENT 3

% of Average Supply
Average Year 1922-2021 100%
Single-Dry Year 2021 50%
Consecutive Dry Years 1st Year 1987 73%
Consecutive Dry Years 2nd Year 1988 73%
Consecutive Dry Years 3rd Year 1989 73%
Consecutive Dry Years 4th Year 1990 73%
Consecutive Dry Years 5th Year 1991 73%
Optional Submittal Table 7-1 Retail: Basis of Water Year Data (Reliability Assessment)

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

Volume Available (AF)
8,590
8,590
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.

NOTES: Multiple versions of DWR Table 7-1 are used; this table is for State Water Project supplies only based on existing conditions through 2040. Future (2045 and 2050) conditions are based on the Draft 2025 DCR 50% Level-of-Concern Scenario. 11,826
5,962
8,590
8,590
8,590
ATTACHMENT 3

2030 (AF) 2035 (AF) 2040 (AF) 2045 (AF) 2050 (AF)
Supply totals
(autofill from Submittal Table 6-9 R) 30,026 30,026 30,026 26,710 26,710 Use totals
(autofill from Submittal Table 4-2 R) 13,560 14,035 14,110 14,510 14,810 Surplus/(shortfall) 16,466 15,991 15,916 12,200 11,900
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.

ATTACHMENT 3

Supply totals 17,962 17,962 17,962 16,204 16,204
Use totals 13,560 14,035 14,110 14,510 14,810
Surplus/(shortfall) 4,402 3,927 3,852 1,694 1,394
WSCP - supply augmentation benefit
WSCP - use reduction savings benefit
Revised Surplus/(shortfall)
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)
DWR NOTES : Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Submittal Table 2-3.

NOTES: For 2045 and 2050, Local Surface Water supply totals incorporate an 11% reduction due to assumed long-term climate change impacts. 2045 and 2050 State Water Project supply totals incorporate reductions based on the 50% Level of Concern under Future Climate Change Conditions.
2050 (AF)
ATTACHMENT 3

2030 (AF) 2035 (AF) 2040 (AF) 2045 (AF) 2050 (AF)
Supply totals 19,230 19,230 19,230 16,527 16,527
Use totals 13,560 14,035 14,110 14,510 14,810
Surplus/(shortfall) 5,670 5,195 5,120 2,017 1,717
WSCP - supply augmentation benefit
WSCP - use reduction savings benefit
Revised Surplus/(shortfall)
Supply totals 14,355 14,355 14,355 12,188 12,188
Use totals 13,560 14,035 14,110 14,510 14,810
Surplus/(shortfall) 795 320 245 (2,322) (2,622)
WSCP - supply augmentation benefit
WSCP - use reduction savings benefit
Revised Surplus/(shortfall)
Supply totals 14,355 14,355 14,355 12,188 12,188
Use totals 13,560 14,035 14,110 14,510 14,810
Surplus/(shortfall) 795 320 245 (2,322) (2,622)
WSCP - supply augmentation benefit
WSCP - use reduction savings benefit
Revised Surplus/(shortfall)
Supply totals 14,355 14,355 14,355 12,188 12,188
Use totals 13,560 14,035 14,110 14,510 14,810
Surplus/(shortfall) 795 320 245 (2,322) (2,622)
WSCP - supply augmentation benefit
WSCP - use reduction savings benefit
Revised Surplus/(shortfall)
Supply totals 14,355 14,355 14,355 12,188 12,188
Use totals 13,560 14,035 14,110 14,510 14,810
Surplus/(shortfall) 795 320 245 (2,322) (2,622)
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
Second year
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
OPTIONAL Planned WSCP ActionsFourth year
NOTES: For 2045 and 2050, Local Surface Water supply totals incorporate an 11% reduction due to assumed long-term climate change impacts. 2045 and 2050 State Water Project supply totals incorporate reductions based on the 50% Level of Concern under Future Climate Change Conditions.

First year
OPTIONAL WSCP Actions
ATTACHMENT 3

2026 Total
Total Water Use (AF) 12,481
Total Supplies (AF) 19,230
Surplus/Shortfall w/o WSCP Action 6,749
WSCP - supply augmentation benefit (AF)
WSCP - use reduction savings benefit (AF)
Revised Surplus/(shortfall)
2027 Total
Total Water Use (AF) 12,751
Total Supplies (AF) 14,355
Surplus/Shortfall w/o WSCP Action 1,604
WSCP - supply augmentation benefit (AF)
WSCP - use reduction savings benefit (AF)
Revised Surplus/(shortfall)
2028 Total
Total Water Use (AF) 13,020
Total Supplies (AF) 14,355
Surplus/Shortfall w/o WSCP Action 1,335
WSCP - supply augmentation benefit (AF)
WSCP - use reduction savings benefit (AF)
Revised Surplus/(shortfall)
2029 Total
Total Water Use (AF) 13,290
Total Supplies (AF) 14,355
Surplus/Shortfall w/o WSCP Action 1,065
WSCP - supply augmentation benefit (AF)
WSCP - use reduction savings benefit (AF)
Revised Surplus/(shortfall)
2030 Total
Total Water Use (AF) 13,560
Total Supplies (AF) 14,355
Surplus/Shortfall w/o WSCP Action 795
WSCP - supply augmentation benefit (AF)
WSCP - use reduction savings benefit (AF)
Revised Surplus/(shortfall)
NOTES: Water Use is based on slight annual increase in demands based on population growth and new development. Supplies are based on 1987-1992 Multiple Dry Year scenario reflected in Table 7-1 and 7-4.

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) ATTACHMENT 3

Standard
Shortage
Levels
Percent Shortage
Range
Suppliers
Shortage
Levels
Percent
Shortage Range
1 Up to 10%
2 Up to 20%
3 Up to 30%
4 Up to 40%
5 Up to 50%
6 >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 No action at this shortage level
2 No action at this shortage level
3 Implement or Modify Drought Rate
Structure or Surcharge Percentage 10-15% If determined necessary by City Council and set by resolution
4 Transfers Volume Market-dependent SWP Dry Year Transfer Program 5 Other Purchases Volume Market-dependent Yuba Accord Dry Year Purchase Program 6 Other Actions (describe) Volume Market-dependent Intertie connections with other Napa County cities
Submittal Table 8-2 Retail: Supply Augmentation and Other Actions Water Code Section 10632(a)(4)(A),(C) and (E)
Is the Supplier completing this table using the standard six levels? (yes/no) 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
How much is this going to reduce the
shortage gap?
Additional Explanation or Reference
(OPTIONAL)
Add additional rows as needed
DWR NOTES: Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Submittal Table 2-3.

NOTES:

ATTACHMENT 3

Yes
Volume or Percentage
Drop down
Shortage Gap
Reduction Value
(May be a range) (AF)
1 Expand Public Information Campaign Boosts effectiveness of other, quantifiable actions No 1 Offer Water Use Surveys Percentage 0-2% Standard offering for water customers No 1 Provide Rebates on Plumbing Fixtures
and Devices Percentage 0-2% Standard offering for water customers No 1 Provide Rebates for Landscape
Irrigation Efficiency Percentage 0-2% Standard offering for water customers No 1 Provide Rebates for Turf Replacement Percentage 0-5% Standard offering for water customers No 1 Other - Require automatic shut of hoses Percentage 0-1% Yes 1 Other - Prohibit use of potable water
for washing hard surfaces Percentage 0-1% Yes
1 Landscape - Restrict or prohibit runoff
from landscape irrigation Percentage 0-2% Yes
1 Landscape - Other landscape restriction
or prohibition Percentage 0-1% Prohibit landscape irrigation during and within 48 hours after a quarter inch or more rain event Yes
1 Other - Customers must repair leaks,
breaks, and malfunctions in a timely
manner
Percentage 0-1% Yes
1 Landscape - Limit landscape irrigation
to specific times Percentage 0-2% Prohibit landscape irrigation between 10:00 am and 5:00 pm Yes
2 Increase Water Waste Patrols Percentage 0-3% Yes
2 Landscape - Limit landscape irrigation
to specific days Percentage 0-10% Prohibit landscape irrigation on consecutive days, except for needs of newly planted Yes
2 Other water feature or swimming pool
restriction Percentage 0-2% Prohibit draining and refilling of pools or decorative ponds unless needed for repair Yes
2 CII - Restaurants may only serve water
upon request Percentage 0-1% Yes
2 CII - Lodging establishment must offer
opt out of linen service Percentage 0-1% Yes
3 Landscape - Limit landscape irrigation
to specific days Percentage 5-20% Landscape irrigation limited to two days per week Yes 3 Implement or Modify Drought Rate
Structure or Surcharge Percentage 10-20% If determined necessary and set by City Council Yes 3 Pools and Spas - Require covers for
pools and spas Percentage 0-1% Yes
4 Landscape - Limit landscape irrigation
to specific days Percentage 15-25% Landscape irrigation limited to one day per week Yes 4 Other Volume TBD
Maximum bimonthly water use allocations for
customers, if determined necessary and set by City
Council
Yes
4 Other Volume 1-5 million gallons per
month
Interruptible-Surplus Agricultural Water services
suspended Yes
4 Other - Prohibit use of potable water
for construction and dust control Percentage 0-1% Yes
4 Other water feature or swimming pool
restriction Percentage 0-1% Prohibit filling of any decorative lakes or ponds Yes 4 Other - Prohibit vehicle washing except
at facilities using recycled or
recirculating water
Percentage 0-1% Yes
5 Landscape - Prohibit all landscape
irrigation Percentage 15-35% Yes
5 Landscape - Other landscape restriction
or prohibition Percentage 1-4% Prohibit installation of new or replacement turf Yes 5 CII - Other CII restriction or prohibition Percentage 1-2% Prohibit use of water for street cleaning, line flushing, fire sprinkler testing, firefighter training Yes
5 Other Percentage 2-5% Implement special water conservation plans for largest water users, if determined necessary Yes
6 Landscape - Prohibit all landscape
irrigation Percentage 5-10% Remove previous exceptions for drip and micro- spray, hand watering, irrigation system testing Yes
6 Other water feature or swimming pool
restriction Percentage 0-2% Prohibit draining and refilling of all pools or spas, or filling new pools. No exceptions. Yes
6 Other Percentage 1-2% Prohibit all agricultural irrigation Yes Submittal Table 8-3 Retail: Demand Reduction Actions
Water Code Section 10632(a)(4)(B),(D), and (E)
Is the Supplier completing this table using the standard six levels? (yes/no) 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.

How much is this going to reduce the shortage
gap?
Additional Explanation or Reference
(OPTIONAL)
Penalty, Charge, or
Other
Enforcement?
For Retail Suppliers Only
Drop Down List
Add additional rows as needed
NOTES: Actions introduced in a lower shortage level will also be used in higher shortage levels unless otherwise noted.

ATTACHMENT 3

City Name 60 Day Notice
Drop Down (yes/no)
Notice of Public
Hearing
Drop Down (yes/no)
City of Napa Yes Yes
City of American Canyon Yes Yes
Town of Yountville Yes Yes
City of St. Helena Yes Yes
City of Calistoga Yes Yes
County Name
Drop Down List
60 Day Notice
Drop Down (yes/no)
Notice of Public
Hearing
Drop Down (yes/no)
Napa County Yes Yes
Submittal Table 10-1 Retail: Notification to Cities and Counties Water Code Section 10621(b) and 10642
NOTES: For Napa County, the Planning and Public Works Departments were each notified. In addition, the Napa Sanitation District (NapaSan) was notified, as it is the local recycled water purveyor. The Veterans Home of California was also notified, as it occasionally receives water deliveries from the City.

ATTACHMENT 3

DWR 2025 Urban Water Management Plan Checklist

Appendix D
ATTACHMENT 3

Appendix D
UWMP Checklist

N-C-424-60-26-28
D-1 City of Napa
2025 Urban Water Management Plan
Last Revised: 05-19-26

Retail
x = required
2025
Guidebook
Location
Water Code
Section
Summary as
Applies to UWMP Subject
Relevant
Submittal Table
2025 UWMP
Location
x 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 Executive Summary
x Chapter 1 10630.5 Each plan shall include a simple description of the Supplier’s plan including water availability, future requirements, a strategy for meeting needs, and other pertinent information.

Additionally, a Supplier may also choose to include a simple description at the beginning of each chapter.

Plan Preparation n/a Executive Summary
x 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 n/a

x 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 2-1R Section 2.1
x Section 2.5 10644 Supplier shall report if this UWMP is an individual UWMP and whether the Supplier belongs to a regional UWMP or
regional alliance.

Plan Preparation 2-2 Section 2.2 and 2.3
x 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 2-3R Section 2.4
x 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 2.5
x 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 2.5.2;
Appendix E
ATTACHMENT 3

Appendix D
UWMP Checklist

N-C-424-60-26-28
D-2 City of Napa
2025 Urban Water Management Plan
Last Revised: 05-19-26

Retail
x = required
2025
Guidebook
Location
Water Code
Section
Summary as
Applies to UWMP Subject
Relevant
Submittal Table
2025 UWMP
Location
x 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 2-4R Section 2.5.1
n/a Section 2.4.1 10631(h) Wholesale Suppliers will provide their Suppliers with identification and quantification of the existing and planned sources of water available from the Wholesale Supplier to the Supplier during various water year types.

Plan Preparation 2-4 W n/a
x Chapter 3.0 10631(a) Describe the Supplier service area. System Description
n/a Sections 3.1 and 3.2
x Section 3.3 10631(a) Describe the climate of the Supplier’s service area. System Description
n/a Section 3.5
x Section 3.4.1 10631(a) Provide the current and projected service area populations for 2030, 2035, 2040, 2045 and optionally 2050.

System
Description
3-1R Section 3.6.1
x 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 3.6.2
x Section 3.5 10631(a) Describe the land uses within the service area… include the current and projected land uses within the existing or
anticipated service area affecting the Supplier’s water management planning. Describe the land uses within the
service area.

System
Description and
Baselines
n/a Section 3.7
x 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
4-1R and 4-2R Section 4.2
x 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
4-5R Section 4.3
x Section 4.3.2 10631(d)(3)(C) Retail Suppliers shall provide data to show the distribution loss standards were met.

System Water
Use
4-6R Section 4.3
x 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
4-3R Sections 4.4 and 4.5
ATTACHMENT 3

Appendix D
UWMP Checklist

N-C-424-60-26-28
D-3 City of Napa
2025 Urban Water Management Plan
Last Revised: 05-19-26

Retail
x = required
2025
Guidebook
Location
Water Code
Section
Summary as
Applies to UWMP Subject
Relevant
Submittal Table
2025 UWMP
Location
x 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
4-3R Section 4.4
x 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
4-3R Section 4.4
x 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
4-3R Section 4.4
x Section 4.2.5.6 10635(b) Demands under climate change considerations must be included as part of the drought risk assessment.

System Water
Use
n/a Section 4.6
n/a Section 5.1 10608.36 Wholesale Suppliers shall include an assessment of present and proposed future measures, programs, and policies to help their Retail Suppliers achieve targeted water use
reductions.

Baselines and
Targets
n/a n/a
x 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
5-1R Section 5.2;
Appendix G
x 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 Chapter 6; Sections

6.1, 6.2 and 6.3
ATTACHMENT 3

Appendix D
UWMP Checklist

N-C-424-60-26-28
D-4 City of Napa
2025 Urban Water Management Plan
Last Revised: 05-19-26

Retail
x = required
2025
Guidebook
Location
Water Code
Section
Summary as
Applies to UWMP Subject
Relevant
Submittal Table
2025 UWMP
Location
x Sections 6.1 and 6.2 10631(b)(1) Provide a discussion of anticipated supply availability under a normal, single dry year, and a drought lasting five years, as well as more frequent and severe periods of drought,
including changes in supply due to climate change.

System Supplies n/a Section 6.10 (normal
years); Chapter 7
(dry years)
x 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
6-1R Section 6.4 ;
groundwater is not
currently or planned
to be used by the
City
x Section 6.2.2 10631(b)(4)(A) Indicate whether a groundwater sustainability plan or groundwater management plan has been adopted by the
Supplier or if there is any other specific authorization for groundwater management. Include a copy of the plan
or authorization.

System Supplies n/a Section 6.4 ;
groundwater is not
currently or planned
to be used by the
City
x Section 6.2.2 10631(b)(4)(B) Describe the groundwater basin. System Supplies n/a Section 6.4 ; groundwater is not
currently or planned
to be used by the
City
x Section 6.2.2 10631(b)(4)(B) Indicate if the basin has been adjudicated and include a copy of the court order or decree and a description of the amount of water the Supplier has the legal right to pump.

System Supplies n/a Section 6.4 ;
groundwater is not
currently or planned
to be used by the
City
x Section 6.2.2 10631(b)(4)(B) For unadjudicated basins… (include) information as to whether DWR has identified the basin as a high- or
medium-priority basin in the most current official
departmental bulletin…
Water Supplies
and Recycled
Water
n/a Section 6.4 ;
groundwater is not
currently or planned
to be used by the
City
ATTACHMENT 3

Appendix D
UWMP Checklist

N-C-424-60-26-28
D-5 City of Napa
2025 Urban Water Management Plan
Last Revised: 05-19-26

Retail
x = required
2025
Guidebook
Location
Water Code
Section
Summary as
Applies to UWMP Subject
Relevant
Submittal Table
2025 UWMP
Location
x Section 6.2.2 10631(b)(4)(B) For unadjudicated basins… describe efforts by the Supplier to coordinate with sustainability or groundwater agencies to achieve sustainable groundwater conditions.

Water Supplies
and Recycled
Water
n/a Section 6.4 ;
groundwater is not
currently or planned
to be used by the
City
x Section 6.2.2. 10631(b)(4)(C) If groundwater is identified as an existing or planned source of water… (include) a detailed description and analysis of the location, amount and sufficiency of groundwater
pumped by the Supplier for the past five years.

System Supplies n/a Section 6.4 ;
groundwater is not
currently or planned
to be used by the
City
x 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 6-9R Sections 6.4 and 6.9;
groundwater is not
currently or planned
to be used by the
City
x 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 6-8R and 6-9R Section 6.10
x 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 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)
6-2R Section 6.6.2
x 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)
6-3R Section 6.6.2
x Section 6.2.5 10633(c) Describe the recycled water currently being used in the Supplier's service area.

System Supplies
(Recycled Water)
6-4R Section 6.6.3
ATTACHMENT 3

Appendix D
UWMP Checklist

N-C-424-60-26-28
D-6 City of Napa
2025 Urban Water Management Plan
Last Revised: 05-19-26

Retail
x = required
2025
Guidebook
Location
Water Code
Section
Summary as
Applies to UWMP Subject
Relevant
Submittal Table
2025 UWMP
Location
x 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)
6-4R Sections 6.6.3 and

6.6.4 x 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)
6-4R and 6-5R Section 6.6.3
x 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)
6-6R Section 6.6.4
x 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 6.6.4
x Section 6.2.6 10631(g) Describe desalinated water project opportunities for long-term supply.

System Supplies 6-7R Section 6.7
x Section 6.2.10 10631(f) Describe the expected future water supply projects and programs that may be undertaken by the water Supplier to address water supply reliability in average, single-dry, and for a period of drought lasting five consecutive water years.

System Supplies 6-7R Section 6.9
x 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-1B Section 6.12
x Section 7.1 10634 Provide information on the quality of existing sources of water available to the Supplier and the manner in which water quality affects water management strategies and
supply reliability.

Water Supply
Reliability
Assessment
n/a Section 7.1.1
x 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
Water Supply
Reliability
Assessment
7-2R, 7-3R,
and 7-4R
Section 7.1.3
ATTACHMENT 3

Appendix D
UWMP Checklist

N-C-424-60-26-28
D-7 City of Napa
2025 Urban Water Management Plan
Last Revised: 05-19-26

Retail
x = required
2025
Guidebook
Location
Water Code
Section
Summary as
Applies to UWMP Subject
Relevant
Submittal Table
2025 UWMP
Location
supply sources available to the Supplier with the total projected water use over the next 20 years.
x Section 7.2.3 10620(f) Describe water management tools and options to maximize resources and minimize the need to import water from
other regions.

Water Supply
Reliability
Assessment
n/a Section 7.1.4
x Section 7.3 10635(b) Provide a drought risk assessment as part of information considered in developing the demand management
measures and water supply projects.

Water Supply
Reliability
Assessment
n/a Section 7.2
x 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 7.2.1
x Section 7.3 10635(b)(2) Include a determination of the reliability of each source of supply under a variety of water shortage conditions.

Water Supply
Reliability
Assessment
n/a Section 7.2.2
x Section 7.3 10635(b)(3) Include a comparison of the total water supply sources available to the Supplier with the total projected water use for the drought period.

Water Supply
Reliability
Assessment
7-5 R Section 7.2.3
x Section 7.3 10635(b)(4) Include considerations of the historical drought hydrology, plausible changes on projected supplies and demands under climate change conditions, anticipated regulatory changes, and other locally applicable criteria.

Water Supply
Reliability
Assessment
n/a Section 7.2.1
x Chapter 8 10632(a) Provide a water shortage contingency plan (WSCP) with specified elements below.

Water Shortage
Contingency
Planning
n/a Appendix J
x 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 Chapter 8;
Appendix J
(Section 1)
ATTACHMENT 3

Appendix D
UWMP Checklist

N-C-424-60-26-28
D-8 City of Napa
2025 Urban Water Management Plan
Last Revised: 05-19-26

Retail
x = required
2025
Guidebook
Location
Water Code
Section
Summary as
Applies to UWMP Subject
Relevant
Submittal Table
2025 UWMP
Location
x 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 Appendix J
(Section 2)
x 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 Appendix J
(Section 2)
x Section 8.3 10632(a)(3)(A) Define six standard water shortage levels of 10%, 20%, 30%, 40%, 50% shortage, and greater than 50% shortage. These levels shall be based on supply conditions, including percent reductions in supply, changes in groundwater levels,
changes in surface elevation, or other conditions. The
shortage levels shall also apply to a catastrophic
interruption of supply.

Water Shortage
Contingency
Planning
n/a Section 8.2;
Appendix J
(Section 3)
x 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 R Appendix J
(Section 3)
x 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 R Appendix J
(Section 4.1)
x Section 8.4 10632(a)(4)(B) Specify locally appropriate demand reduction actions to adequately respond to shortages.

Water Shortage
Contingency
Planning
8-3 R Appendix J
(Section 4.2)
x Section 8.4 10632(a)(4)(C) Specify locally appropriate operational changes. Water Shortage Contingency
Planning
8-2 R Appendix J
(Section 4.3)
x 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
8-3 R Appendix J
(Section 4.4)
ATTACHMENT 3

Appendix D
UWMP Checklist

N-C-424-60-26-28
D-9 City of Napa
2025 Urban Water Management Plan
Last Revised: 05-19-26

Retail
x = required
2025
Guidebook
Location
Water Code
Section
Summary as
Applies to UWMP Subject
Relevant
Submittal Table
2025 UWMP
Location
x 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 R and 8-3 R Appendix J
(Sections 4.1 and

4.2)
x 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;
Appendix J
(Section 4.6)
x 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 Appendix J
(Section 5)
x 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 Appendix J
(Section 5)
x 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 Appendix J
(Section 6)
x 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 Appendix J
(Section 7)
x 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 Appendix J
(Section 7)
x 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 Appendix J
(Section 7)
x 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 Appendix J
(Section 8)
ATTACHMENT 3

Appendix D
UWMP Checklist

N-C-424-60-26-28
D-10 City of Napa
2025 Urban Water Management Plan
Last Revised: 05-19-26

Retail
x = required
2025
Guidebook
Location
Water Code
Section
Summary as
Applies to UWMP Subject
Relevant
Submittal Table
2025 UWMP
Location
x 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 Appendix J
(Section 8)
x 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 Appendix J
(Section 8)
x 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 Appendix J
(Section 9)
x 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 8.5;
Appendix J
(Section 10)
x 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 Appendix J
(Section 11)
x Section 8.12 10632(c) Make available the WSCP to customers and any city or county where it provides water within 30 days after
adoption of the plan.

Water Shortage
Contingency
Planning
n/a Section 8.5;
Appendix J
(Section 12)
x Sections 9.1 10631(e)(1) Retail Suppliers shall provide a description of the nature and extent of each demand management measure implemented
over the past five years. The description will address specific measures listed in code.

Demand
Management
Measures
n/a Chapter 9
n/a 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
ATTACHMENT 3

Appendix D
UWMP Checklist

N-C-424-60-26-28
D-11 City of Napa
2025 Urban Water Management Plan
Last Revised: 05-19-26

Retail
x = required
2025
Guidebook
Location
Water Code
Section
Summary as
Applies to UWMP Subject
Relevant
Submittal Table
2025 UWMP
Location
x 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 10.3.1
x Section 10.2.1 10621(b) Notify, at least 60 days prior to the public hearing, any city or county within which the Supplier provides water that the Supplier will be reviewing the UWMP and considering
amendments or changes to the plan.

Plan Adoption,
Submittal, and
Implementation
10-1 Section 10.2.1
x Section 10.4 10621(f) Each urban water Supplier shall update and submit its 2025 plan to DWR by July 1, 2026.

Plan Adoption,
Submittal, and
Implementation
n/a Section 10.4
x 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; Appendix E
x 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 R Section 10.3;
Appendix E
x 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 10.3.2;
Appendix K
x Section 10.4 10644(a) Provide supporting documentation that the Supplier has submitted their UWMP to the California State Library.

Plan Adoption,
Submittal, and
Implementation
n/a Section 10.4
x 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 10.4
ATTACHMENT 3

Appendix D
UWMP Checklist

N-C-424-60-26-28
D-12 City of Napa
2025 Urban Water Management Plan
Last Revised: 05-19-26

Retail
x = required
2025
Guidebook
Location
Water Code
Section
Summary as
Applies to UWMP Subject
Relevant
Submittal Table
2025 UWMP
Location
x Sections 10.4.1
and 10.4.2
10644(a)(2) The UWMP, or amendments to the UWMP, submitted to DWR shall be submitted electronically.

Plan Adoption,
Submittal, and
Implementation
n/a Section 10.4
x Section 10.7.2 10644(b) If revised, submit a copy of the WSCP to DWR within 30 days of adoption.

Plan Adoption,
Submittal, and
Implementation
n/a Section 10.7
x 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 Section 10.5 10645(b) Provide supporting documentation that, not later than 30 days after filing a copy of its WSCP with DWR, the Supplier has or will make the plan available for public review during normal business hours.

Plan Adoption,
Submittal, and
Implementation
n/a Section 10.5
x 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
ATTACHMENT 3

Agency and Public Notices

Appendix E
ATTACHMENT 3

ATTACHMENT 3

ATTACHMENT 3

ATTACHMENT 3

ATTACHMENT 3

ATTACHMENT 3

ATTACHMENT 3

ATTACHMENT 3

ATTACHMENT 3

Distribution System Water Loss Audits

Appendix F
ATTACHMENT 3

5 Name of Contact Person: All audit data are entered on the Reporting Worksheet Email Address: Value can be entered by user
Telephone | Ext.: 707-257-9309 Value calculated based on input data Name of City / Utility: These cells contain recommended default values City/Town/Municipality:

State / Province: Pcnt: Value:

Country: 0.25%
Year: 2020 Calendar Year
Start Date: Enter MM/YYYY numeric format
End Date: Enter MM/YYYY numeric format
Audit Preparation Date:

Volume Reporting Units:

PWSID / Other ID:

If you have questions or comments regarding the software please contact us via email at:[email protected] AWWA Free Water Audit Software v5.0
City of Napa
The following worksheets are available by clicking the buttons below or selecting the tabs along the bottom of the page Napa
[email protected]
Auditors are strongly encouraged to refer to the most current edition of AWWA M36 Manual for Water Audits for detailed guidance on the water auditing process and targetting loss reduction levels This spreadsheet-based water audit tool is designed to help quantify and track water losses associated with water distribution systems and identify areas for improved efficiency and cost recovery. It provides a "top-down" summary water audit format, and is not meant to take the place of a full-scale, comprehensive water audit format.

CA2810003
USA
Use of Option
(Radio) Buttons:

The spreadsheet contains several separate worksheets. Sheets can be accessed using the tabs towards the bottom of the screen, or by clicking the buttons below.

Patrick Costello
Million gallons (US)
Please begin by providing the following information The following guidance will help you complete the Audit California (CA)
American Water Works Association Copyright © 2014, All Rights Reserved.

Select the default percentage
by choosing the option button
on the left
To enter a value, choose
this button and enter a
value in the cell to the right
Instructions
The current sheet.

Enter contact
information and basic
audit details (year,
units etc)
Performance
Indicators
Review the
performance
indicators to evaluate the results of the audit
Comments
Enter comments to
explain how values
were calculated or to
document data
sources
Water Balance
The values entered in
the Reporting
Worksheet are used to
populate the Water
Balance
Dashboard
A graphical summary
of the water balance
and Non-Revenue
Water components
Grading Matrix
Presents the possible
grading options for
each input component
of the audit
Service Connection
Diagram
Diagrams depicting
possible customer service
connection line
configurations
Acknowledgements
Acknowledgements for
the AWWA Free Water
Audit Software v5.0
Loss Control
Planning
Use this sheet to
interpret the results of
the audit validity score
and performance
indicators
Definitions
Use this sheet to
understand the terms
used in the audit
process
Example Audits
Reporting Worksheet
and Performance
Indicators examples
are shown for two
validated audits
Reporting Worksheet
Enter the required data
on this worksheet to
calculate the water
balance and data grading
AWWA Free Water Audit Software v5.0 Instructions 1
ATTACHMENT 3

Water Audit Report for:

Reporting Year:

All volumes to be entered as: MILLION GALLONS (US) PER YEAR Master Meter and Supply Error Adjustments
WATER SUPPLIED Pcnt: Value:

Volume from own sources: 7 4,855.141 MG/Yr 4 MG/Yr
Water imported: n/a 0.000 MG/Yr MG/Yr
Water exported: 6 384.209 MG/Yr 5 0.60% MG/Yr
Enter negative % or value for under-registration
WATER SUPPLIED: 4,473.239 MG/Yr Enter positive % or value for over-registration .

AUTHORIZED CONSUMPTION
Billed metered: 8 4,126.790 MG/Yr
Billed unmetered: n/a 0.000 MG/Yr
Unbilled metered: n/a 0.000 MG/Yr Pcnt: Value:

Unbilled unmetered: 5 11.183 MG/Yr 1.25% MG/Yr24061
AUTHORIZED CONSUMPTION: 4,137.973 MG/Yr
WATER LOSSES (Water Supplied - Authorized Consumption) 335.265 MG/Yr Apparent Losses Pcnt: Value:

Unauthorized consumption: 5 11.183 MG/Yr 0.25% MG/Yr
Customer metering inaccuracies: 6 41.685 MG/Yr 1.00% MG/Yr Systematic data handling errors: 10.317 MG/Yr 0.25% MG/Yr Apparent Losses: 63.185 MG/Yr
Real Losses (Current Annual Real Losses or CARL)
Real Losses = Water Losses - Apparent Losses: 272.081 MG/Yr WATER LOSSES: 335.265 MG/Yr

NON-REVENUE WATER
NON-REVENUE WATER: 346.449 MG/Yr
= Water Losses + Unbilled Metered + Unbilled Unmetered

SYSTEM DATA
Length of mains: 10 359.9 miles
Number of active AND inactive service connections: 8 25,892 Service connection density: 72 conn./mile main
Yes
Average length of customer service line: ft
Average operating pressure: 9 70.0 psi

COST DATA
Total annual cost of operating water system: 10 $30,869,446 $/Year Customer retail unit cost (applied to Apparent Losses): 9 $6.31 Variable production cost (applied to Real Losses): 8 $1,839.88 $/Million gallons WATER AUDIT DATA VALIDITY SCORE:

PRIORITY AREAS FOR ATTENTION:
1: Volume from own sources
2: Customer metering inaccuracies
3: Unauthorized consumption
Average length of customer service line has been set to zero and a data grading score of 10 has been applied Are customer meters typically located at the curbstop or property line? AWWA Free Water Audit Software:

Reporting Worksheet

11.183
2020 1/2020 - 12/2020
City of Napa (CA2810003)
*** YOUR SCORE IS: 74 out of 100 ***
A weighted scale for the components of consumption and water loss is included in the calculation of the Water Audit Data Validity Score -0.015

15.000

0.000
Default option selected for Systematic data handling errors - a grading of 5 is applied but not displayed Based on the information provided, audit accuracy can be improved by addressing the following components:
$/1000 gallons (US)
<----------- Enter grading in column 'E' and 'J' ----------> Default option selected for unauthorized consumption - a grading of 5 is applied but not displayed ?
?
?
?
?
? Click to access definition
?
?
?
?
?
?
Please enter data in the white cells below. Where available, metered values should be used; if metered values are unavailable please estimate a value. Indicate your confidence in the accuracy of the input data by grading each component (n/a or 1-10) using the drop-down list to the left of the input cell. Hover the mouse over the cell to obtain a description of the grades ?
?
?
?
?
?
(length of service line, beyond the property
boundary, that is the responsibility of the utility)
Use buttons to select
percentage of water
supplied
OR
value
?Click here:
for help using option
buttons below
?
?
?
?
+
+ Click to add a comment
WAS v5.0
+
+
+
+
+
+
American Water Works Association.

Copyright © 2014, All Rights Reserved.
?
?
?
+
+
+
+
+
+
+
+
+
+
+
+
+
Use Customer Retail Unit Cost to value real losses
?
To select the correct data grading for each input, determine the highest grade where the utility meets or exceeds all criteria for that grade and all grades below it.

AWWA Free Water Audit Software v5.0 Reporting Worksheet 1 ATTACHMENT 3

Water Audit Report for:

Reporting Year:

All volumes to be entered as: MILLION GALLONS (US) PER YEAR Master Meter and Supply Error Adjustments
WATER SUPPLIED Pcnt: Value:

Volume from own sources: 7 4,373.685 MG/Yr 4 MG/Yr
Water imported: n/a 0.000 MG/Yr MG/Yr
Water exported: 6 365.400 MG/Yr 5 0.82% MG/Yr
Enter negative % or value for under-registration
WATER SUPPLIED: 4,012.341 MG/Yr Enter positive % or value for over-registration .

AUTHORIZED CONSUMPTION
Billed metered: 8 3,632.093 MG/Yr
Billed unmetered: n/a 0.000 MG/Yr
Unbilled metered: n/a 0.000 MG/Yr Pcnt: Value:

Unbilled unmetered: 5 10.031 MG/Yr 1.25% MG/Yr24061
AUTHORIZED CONSUMPTION: 3,642.124 MG/Yr
WATER LOSSES (Water Supplied - Authorized Consumption) 370.217 MG/Yr Apparent Losses Pcnt: Value:

Unauthorized consumption: 5 10.031 MG/Yr 0.25% MG/Yr
Customer metering inaccuracies: 7 19.353 MG/Yr 0.53% MG/Yr Systematic data handling errors: 9.080 MG/Yr 0.25% MG/Yr Apparent Losses: 38.464 MG/Yr
Real Losses (Current Annual Real Losses or CARL)
Real Losses = Water Losses - Apparent Losses: 331.753 MG/Yr WATER LOSSES: 370.217 MG/Yr

NON-REVENUE WATER
NON-REVENUE WATER: 380.248 MG/Yr
= Water Losses + Unbilled Metered + Unbilled Unmetered

SYSTEM DATA
Length of mains: 10 361.1 miles
Number of active AND inactive service connections: 8 25,978 Service connection density: 72 conn./mile main
Yes
Average length of customer service line: ft
Average operating pressure: 9 70.0 psi

COST DATA
Total annual cost of operating water system: 10 $30,684,179 $/Year Customer retail unit cost (applied to Apparent Losses): 9 $6.73 Variable production cost (applied to Real Losses): 8 $1,866.50 $/Million gallons WATER AUDIT DATA VALIDITY SCORE:

PRIORITY AREAS FOR ATTENTION:
1: Volume from own sources
2: Unauthorized consumption
3: Systematic data handling errors
Based on the information provided, audit accuracy can be improved by addressing the following components:
$/1000 gallons (US)
<----------- Enter grading in column 'E' and 'J' ----------> Default option selected for unauthorized consumption - a grading of 5 is applied but not displayed *** YOUR SCORE IS: 75 out of 100 ***
A weighted scale for the components of consumption and water loss is included in the calculation of the Water Audit Data Validity Score -1.084

15.000

0.000
Default option selected for Systematic data handling errors - a grading of 5 is applied but not displayed Average length of customer service line has been set to zero and a data grading score of 10 has been applied Are customer meters typically located at the curbstop or property line? AWWA Free Water Audit Software:

Reporting Worksheet

10.031
2021 1/2021 - 12/2021
City of Napa (CA2810003)
?
?
?
?
?
? Click to access definition
?
?
?
?
?
?
Please enter data in the white cells below. Where available, metered values should be used; if metered values are unavailable please estimate a value. Indicate your confidence in the accuracy of the input data by grading each component (n/a or 1-10) using the drop-down list to the left of the input cell. Hover the mouse over the cell to obtain a description of the grades ?
?
?
?
?
?
(length of service line, beyond the property
boundary, that is the responsibility of the utility)
Use buttons to select
percentage of water
supplied
OR
value
?Click here:
for help using option
buttons below
?
?
?
?
+
+ Click to add a comment
WAS v5.0
+
+
+
+
+
+
American Water Works Association.

Copyright © 2014, All Rights Reserved.
?
?
?
+
+
+
+
+
+
+
+
+
+
+
+
+
Use Customer Retail Unit Cost to value real losses
?
To select the correct data grading for each input, determine the highest grade where the utility meets or exceeds all criteria for that grade and all grades below it.

AWWA Free Water Audit Software v5.0 Reporting Worksheet 1 ATTACHMENT 3

Water Audit Report for:

Audit Year:

All volumes to be entered as: MILLION GALLONS (US) PER YEAR WATER SUPPLIED choose entry option:

VOS Volume from Own Sources: n g 7 4,169.097 MG/Yr n g 4 volume MG/Yr over-registration VOSEA WI Water Imported: n g n/a 0.000 MG/Yr n g n/a percent MG/Yr select….. WIEA WE Water Exported: n g 6 325.097 MG/Yr n g 5 0.47% percent MG/Yr under-registration WEEA 3,842.033 MG/Yr
.

AUTHORIZED CONSUMPTION
BMAC Billed Metered: n g 8 3,533.725 MG/Yr
BUAC Billed Unmetered: n g n/a 0.000 MG/Yr
UMAC Unbilled Metered: n g n/a 0.000 MG/Yr choose entry option:

UUAC Unbilled Unmetered: n g 3 8.834 MG/Yr 0.25% default MG/Yr24061 Default option selected for Unbilled Unmetered, with automatic data grading of 3 3,542.559 MG/Yr
WATER LOSSES 299.474 MG/Yr
Apparent Losses
Default option selected for Systematic Data Handling Errors, with automatic data grading of 3 choose entry option:

SDHE Systematic Data Handling Errors: n g 3 8.834 MG/Yr 0.25% default MG/Yr CMI Customer Metering Inaccuracies: n g 7 34.613 MG/Yr 0.97% percent MG/Yr under-registration UC Unauthorized Consumption: n g 3 8.834 MG/Yr 0.25% default MG/Yr Default option selected for Unauthorized Consumption, with automatic data grading of 3

52.282 MG/Yr
Real Losses
247.192 MG/Yr
299.474 MG/Yr

NON-REVENUE WATER
308.308 MG/Yr

SYSTEM DATA
Lm Length of mains: n g 10 360.2 miles (including fire hydrant lead lengths) Nc Number of service connections: n g 8 26,114 (active and inactive) Service connection density: 72 conn./mile main
Yes
Lp Average length of (private) customer service line: n g 10 ft (average distance between property line and meter) AOP Average Operating Pressure: n g 9 70.0 psi

COST DATA
CRUC Customer Retail Unit Charge: n g 9 $6.56
VPC Variable Production Cost: n g 8 $2,609.66 $/Million gallons $/yr (optional input) WATER AUDIT DATA VALIDITY TIER:
go to
dashboard
PRIORITY AREAS FOR ATTENTION TO IMPROVE DATA VALIDITY: KEY PERFORMANCE INDICATOR TARGETS:

Based on the information provided, audit reliability can be most improved by addressing the following components: OPTIONAL: If targets exist for the operational performance indicators, they can be input below:
1: Volume from Own Sources (VOS) Unit Total Losses: gal/conn/day 2: Billed Metered (BMAC) Unit Apparent Losses: 6.3 gal/conn/day 3: Unauthorized Consumption (UC) Unit Real LossesA: 17.9 gal/conn/day Unit Real LossesB: gal/mile/day
If entered above by user, targets will display on KPI gauges (see Dashboard) go to start page
NON-REVENUE WATER:

If entering an
Error Adjustment,
select under- or over-
registration
WATER SUPPLIED:

AUTHORIZED CONSUMPTION:

Apparent Losses:

Average length of customer service line has been set to zero and a data grading of 10 has been applied A weighted scale for the components of supply, consumption and water loss is included in the calculation of the Water Audit Data Validity Score *** The Water Audit Data Validity Score is in Tier IV (71-90). See Dashboard tab for additional outputs. *** $/1000 gallons (US)
$28,828,378
Total Annual Operating Cost
Are customer meters typically located at the curbstop/property line? AWWA Free Water Audit Software:

Worksheet
City of Napa

0.432
Jan 01 2022 - Dec 31 2022
Water Supplied Error Adjustments
Calendar2022
Real Losses:

WATER LOSSES:

Click 'g' to determine data validity grade
Click 'n' to add notes
FWAS v6.0
American Water Works Association.

Copyright © 2020, All Rights Reserved.

To access definitions, click the input name
To edit water system info:

AWWA Free Water Audit Software v6.0 Worksheet 1
ATTACHMENT 3

Water Audit Report for:

Audit Year:

All volumes to be entered as: MILLION GALLONS (US) PER YEAR WATER SUPPLIED choose entry option:

VOS Volume from Own Sources: n g 7 4,176.125 MG/Yr n g 8 volume MG/Yr over-registration VOSEA WI Water Imported: n g n/a 0.000 MG/Yr n g n/a percent MG/Yr select….. WIEA WE Water Exported: n g 6 425.269 MG/Yr n g 9 1.95% percent MG/Yr under-registration WEEA 3,741.676 MG/Yr
.

AUTHORIZED CONSUMPTION
BMAC Billed Metered: n g 8 3,362.313 MG/Yr
BUAC Billed Unmetered: n g n/a 0.000 MG/Yr
UMAC Unbilled Metered: n g n/a 0.000 MG/Yr choose entry option:

UUAC Unbilled Unmetered: n g 3 8.406 MG/Yr 0.25% default MG/Yr24061 Default option selected for Unbilled Unmetered, with automatic data grading of 3 3,370.719 MG/Yr
WATER LOSSES 370.958 MG/Yr
Apparent Losses
Default option selected for Systematic Data Handling Errors, with automatic data grading of 3 choose entry option:

SDHE Systematic Data Handling Errors: n g 3 8.406 MG/Yr 0.25% default MG/Yr CMI Customer Metering Inaccuracies: n g 7 50.510 MG/Yr 1.48% percent MG/Yr under-registration UC Unauthorized Consumption: n g 3 8.406 MG/Yr 0.25% default MG/Yr Default option selected for Unauthorized Consumption, with automatic data grading of 3

67.321 MG/Yr
Real Losses
303.636 MG/Yr
370.958 MG/Yr

NON-REVENUE WATER
379.363 MG/Yr

SYSTEM DATA
Lm Length of mains: n g 10 359.7 miles (including fire hydrant lead lengths) Nc Number of service connections: n g 8 26,974 (active and inactive) Service connection density: 75 conn./mile main
Yes
Lp Average length of (private) customer service line: n g 10 ft (average distance between property line and meter) AOP Average Operating Pressure: n g 9 70.0 psi

COST DATA
CRUC Customer Retail Unit Charge: n g 9 $6.76
VPC Variable Production Cost: n g 8 $1,595.09 $/Million gallons $/yr (optional input) WATER AUDIT DATA VALIDITY TIER:
go to
dashboard
PRIORITY AREAS FOR ATTENTION TO IMPROVE DATA VALIDITY: KEY PERFORMANCE INDICATOR TARGETS:

Based on the information provided, audit reliability can be most improved by addressing the following components: OPTIONAL: If targets exist for the operational performance indicators, they can be input below:
1: Volume from Own Sources (VOS) Unit Total Losses: gal/conn/day 2: Billed Metered (BMAC) Unit Apparent Losses: 6.3 gal/conn/day 3: Unauthorized Consumption (UC) Unit Real LossesA: 17.9 gal/conn/day Unit Real LossesB: gal/mile/day
If entered above by user, targets will display on KPI gauges (see Dashboard) Are customer meters typically located at the curbstop/property line? AWWA Free Water Audit Software:

Worksheet
City of Napa

0.722
Jan 01 2023 - Dec 31 2023
Water Supplied Error Adjustments
Calendar2023
Real Losses:

WATER LOSSES:

Average length of customer service line has been set to zero and a data grading of 10 has been applied A weighted scale for the components of supply, consumption and water loss is included in the calculation of the Water Audit Data Validity Score *** The Water Audit Data Validity Score is in Tier IV (71-90). See Dashboard tab for additional outputs. *** $/1000 gallons (US)
$31,941,161
Total Annual Operating Cost
go to start page
NON-REVENUE WATER:

If entering an
Error Adjustment,
select under- or
over-registration
WATER SUPPLIED:

AUTHORIZED CONSUMPTION:

Apparent Losses:

Click 'g' to determine data validity grade
Click 'n' to add notes
FWAS v6.0
American Water Works Association.

Copyright © 2020, All Rights Reserved.

To access definitions, click the input name
To edit water system info:

AWWA Free Water Audit Software v6.0 Worksheet 1
ATTACHMENT 3

Water Audit Report for:

Audit Year:

All volumes to be entered as: MILLION GALLONS (US) PER YEAR WATER SUPPLIED choose entry option:

VOS Volume from Own Sources: n g 7 4,370.262 MG/Yr n g 8 volume MG/Yr under-registration VOSEA WI Water Imported: n g n/a 0.000 MG/Yr n g n/a percent MG/Yr select….. WIEA WE Water Exported: n g 6 426.807 MG/Yr n g 9 4.31% percent MG/Yr under-registration WEEA 3,925.117 MG/Yr
.

AUTHORIZED CONSUMPTION
BMAC Billed Metered: n g 8 3,585.817 MG/Yr
BUAC Billed Unmetered: n g n/a 0.000 MG/Yr
UMAC Unbilled Metered: n g n/a 0.000 MG/Yr choose entry option:

UUAC Unbilled Unmetered: n g 3 8.965 MG/Yr 0.25% default MG/Yr24061 Default option selected for Unbilled Unmetered, with automatic data grading of 3 3,594.782 MG/Yr
WATER LOSSES 330.336 MG/Yr
Apparent Losses
Default option selected for Systematic Data Handling Errors, with automatic data grading of 3 choose entry option:

SDHE Systematic Data Handling Errors: n g 3 8.965 MG/Yr 0.25% default MG/Yr CMI Customer Metering Inaccuracies: n g 7 97.233 MG/Yr 2.64% percent MG/Yr under-registration UC Unauthorized Consumption: n g 3 8.965 MG/Yr 0.25% default MG/Yr Default option selected for Unauthorized Consumption, with automatic data grading of 3 115.162 MG/Yr
Real Losses
215.174 MG/Yr
330.336 MG/Yr

NON-REVENUE WATER
339.300 MG/Yr

SYSTEM DATA
Lm Length of mains: n g 10 360.3 miles (including fire hydrant lead lengths) Nc Number of service connections: n g 8 26,362 (active and inactive) Service connection density: 73 conn./mile main
Yes
Lp Average length of (private) customer service line: n g 10 ft (average distance between property line and meter) AOP Average Operating Pressure: n g 9 70.0 psi

COST DATA
CRUC Customer Retail Unit Charge: n g 9 $7.87
VPC Variable Production Cost: n g 8 $1,635.18 $/Million gallons $/yr (optional input) WATER AUDIT DATA VALIDITY TIER:
go to
dashboard
PRIORITY AREAS FOR ATTENTION TO IMPROVE DATA VALIDITY: KEY PERFORMANCE INDICATOR TARGETS:

Based on the information provided, audit reliability can be most improved by addressing the following components: OPTIONAL: If targets exist for the operational performance indicators, they can be input below:
1: Volume from Own Sources (VOS) Unit Total Losses: gal/conn/day 2: Billed Metered (BMAC) Unit Apparent Losses: 6.3 gal/conn/day 3: Unauthorized Consumption (UC) Unit Real LossesA: 26.8 gal/conn/day Unit Real LossesB: gal/mile/day
If entered above by user, targets will display on KPI gauges (see Dashboard) Are customer meters typically located at the curbstop/property line? AWWA Free Water Audit Software:

Worksheet

9.000
City of Napa

0.886
Jan 01 2024 - Dec 31 2024
Water Supplied Error Adjustments
Calendar2024
Real Losses:

WATER LOSSES:

Average length of customer service line has been set to zero and a data grading of 10 has been applied A weighted scale for the components of supply, consumption and water loss is included in the calculation of the Water Audit Data Validity Score *** The Water Audit Data Validity Score is in Tier IV (71-90). See Dashboard tab for additional outputs. *** $/1000 gallons (US)
$37,565,866
Total Annual Operating Cost
go to start page
NON-REVENUE WATER:

If entering an
Error Adjustment,
select under- or
over-registration
WATER SUPPLIED:

AUTHORIZED CONSUMPTION:

Apparent Losses:

Click 'g' to determine data validity grade
Click 'n' to add notes
FWAS v6.0
American Water Works Association.

Copyright © 2020, All Rights Reserved.

To access definitions, click the input name
To edit water system info:

AWWA Free Water Audit Software v6.0 Worksheet 1
ATTACHMENT 3

SB X7-7 Compliance Tables

Appendix G
ATTACHMENT 3

SB X7-7 Table 0: Units of Measure Used in 2025 UWMP
Water Code Section 10608.20 (e) and 10608.20(h)(1)(2)
(select one from the drop down list)
Acre Feet
The unit of measure must be consistent throughout the UWMP, as reported in Submittal Table 2-3.

NOTES:

NOTES:

SB X7-7 Table 2: Method for 2025 Population Estimate
Water Code Section 10608.20 (e) and 10608.20(h)(1)(2)
Method Used to Determine 2025 Population
(may check more than one)

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

3. Other
DWR recommends pre-review

2. Persons-per-Connection Method

3. DWR Population Tool
85,366 2025
SB X7-7 Table 3: 2025 Service Area Population
Water Code Section 10608.20 (e) and
10608.20(h)(1)(2)
2025 Compliance Year Population
NOTES:

ATTACHMENT 3

Exported
Water
Change in
Dist.

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

Water
Delivered
for
Agricultural
Use
Process
Water
This column
will remain
blank until SB
X7-7 Table 4-D
is completed.
12,211 731 - 77 - 11,403 NOTES: Volumes are in AF. In 2025, the City exported water to the City of St. Helena, the Town of Yountville, and the California Veterans Home.

SB X7-7 Table 4: 2025 Gross Water Use
Water Code Section 10608.20 (e) and 10608.20(h)(1)(2)
2025 Volume
Into
Distribution
System
This column
will remain
blank until SB
X7-7 Table 4-A is
completed.
2025 Gross
Water Use
2025 Deductions
DWR NOTES: Units of measure (AF, MG , or CCF) must remain consistent throughout the UWMP, as reported in SB X7-7 Table 0 and Submittal Table 2-3.

Compliance
Year 2025
Volume Entering
Distribution System
Meter Error
Adjustment
Optional
(+/-)
Corrected Volume
Entering
Distribution System
8,885 - 8,885 SB X7-7 Table 4-A: 2025 Volume Entering the Distribution System(s), Meter Error Adjustment
Water Code Section 10608.20 (e) and 10608.20(h)(1)(2)
Complete one table for each source.

Name of Source
DWR NOTES: Units of measure (AF, MG , or CCF) must remain consistent throughout the UWMP, as reported in SB X7-7 Table 0 and Submittal Table 2-3.

Meter Error Adjustment - See guidance in Methodology 1, Step 3 of Methodologies Document
NOTES: Lake Hennessey only. Milliken Reservoir source not used in 2025.

This water source is (check one):

The supplier's own water source
A purchased or imported source
Local Surface Water
Compliance Year
2025
ATTACHMENT 3

Volume Entering
Distribution System
Meter Error
Adjustment
Optional
(+/-)
Corrected Volume
Entering
Distribution System
3,326 3,326
A purchased or imported source
DWR NOTES: Units of measure (AF, MG , or CCF) must remain consistent throughout the UWMP, as reported in SB X7-7 Table 0 and Submittal Table 2-3.

Meter Error Adjustment - See guidance in Methodology 1, Step 3 of Methodologies Document
Compliance Year
2025
Name of Source State Water Project
SB X7-7 Table 4-A: 2025 Volume Entering the Distribution System(s), Meter Error Adjustment
Water Code Section 10608.20 (e) and 10608.20(h)(1)(2)
Complete one table for each source.

The supplier's own water source
NOTES: Excludes American Canyon and Calistoga State Water Project deliveries 2025 Gross Water
Fm SB X7-7 Table 4
2025 Population Fm
SB X7-7 Table 3 2025 GPCD
11,403 85,366 119 SB X7-7 Table 5: 2025 Gallons Per Capita Per Day (GPCD) Water Code Section 10608.20 (e) and 10608.20 (h)(1)(2)
NOTES:

Extraordinary
Events
(GPCD)
Weather
Normalization
(GPCD)
Economic
Adjustment
(GPCD)
119 - - - 119.2505487 132 YES NOTES:

DWR NOTES: All values are reported in GPCD
Suppliers that had a merger or consolidation since 2020 may use a population weighted average 2020 target. See Section P.1.2.1 of Appendix P.

SB X7-7 Table 9: 2025 Compliance
Water Code Section 10608.24(d)
Optional Adjustments to 2025 GPCD
Did Supplier
Achieve
Targeted
Reduction for
2025?
Actual 2025
GPCD 2020 TargetTOTAL
Adjustments
Adjusted
2025 GPCD
(Adjusted if
applicable)
Enter "0" if Adjustment Not Used
ATTACHMENT 3

Recycled Water Sales Agreement

Appendix H
ATTACHMENT 3

ATTACHMENT 3

ATTACHMENT 3

ATTACHMENT 3

ATTACHMENT 3

ATTACHMENT 3

ATTACHMENT 3

ATTACHMENT 3

ATTACHMENT 3

ATTACHMENT 3

ATTACHMENT 3

ATTACHMENT 3

ATTACHMENT 3

ATTACHMENT 3

ATTACHMENT 3

ATTACHMENT 3

ATTACHMENT 3

ATTACHMENT 3

ATTACHMENT 3

ATTACHMENT 3

ATTACHMENT 3

ATTACHMENT 3

ATTACHMENT 3

ATTACHMENT 3

ATTACHMENT 3

ATTACHMENT 3

ATTACHMENT 3

ATTACHMENT 3

ATTACHMENT 3

ATTACHMENT 3

ATTACHMENT 3

Napa Sanitation District Recycled Water Policy
(Resolution No. 22-020)

Appendix I
ATTACHMENT 3

ATTACHMENT 3

ATTACHMENT 3

ATTACHMENT 3

ATTACHMENT 3

Water Shortage Continency Plan

Appendix J
ATTACHMENT 3

JOINTLY PREPARED BY

City of Napa
Water Shortage Contingency Plan

DRAFT PLAN | MAY 2026
ATTACHMENT 3

N-424-60-26-28-WP-R-424-2025UWMP
i City of Napa
Last Revised: 05-19-26

Table of Contents

1.0 Water Supply Reliability Analysis ................................ ................................ ................................ .. 1

2.0 Annual Water Supply and Demand Assessment Procedures ................................ ........................... 1

2.1 Decision-Making Process .................................................................................................................. 2

2.1.1 AWSDA Finding: Sufficient Water Supply to Meet Expected Demands ................................. 3

2.1.2 AWSDA Finding: Available Water Supply Will Not Meet Demands ........................................ 3

2.2 Key Data Inputs................................................................................................................................. 4

2.3 Assessment Methodology ................................................................................................................ 5

3.0 Six Standard Water Shortage Levels ................................ ................................ .............................. 5

4.0 Shortage Response Actions and Effectiveness ................................ ................................ ............... 6

4.1 Supply Augmentation and Other Actions ......................................................................................... 7

4.2 Demand Reduction ........................................................................................................................... 7

4.3 Operational Changes ........................................................................................................................ 9

4.4 Emergency Response Plan ................................................................................................................ 9

4.5 Seismic Risk Assessment and Mitigation Plan ................................................................................ 10

5.0 Communication Protocols ................................ ................................ ................................ ........... 10

5.1 Communication for Foreseeable Events ........................................................................................ 10

5.2 Communication for Unforeseeable Events .................................................................................... 11

6.0 Compliance and Enforcement ................................ ................................ ................................ ..... 11

7.0 Legal Authorities ................................ ................................ ................................ ........................ 11

8.0 Financial Consequences of WSCP ................................ ................................ ................................ 12

8.1 Drought Rate Structures and Surcharges ....................................................................................... 12

8.2 Use of Financial Reserves ............................................................................................................... 12

9.0 Monitoring and Reporting ................................ ................................ ................................ .......... 13

10.0 WSCP Refinement Procedures ................................ ................................ ................................ ... 13

11.0 Special Water Feature Distinction ................................ ................................ ............................. 13

12.0 Plan Adoption, Submittal, Availability, and Amendment ................................ ............................ 13

ATTACHMENT 3

N-C-424-60-26-28-WP-R-424-2025UWMP
ii City of Napa
Last Revised: 05-19-26

Table of Contents

LIST OF TABLES
Table 1. Schedule of AWSDA and Decision-Making Activities ............................................................... 2 Table 2. Water Shortage Contingency Plan - Shortage Levels ............................................................... 6 Table 3. Supply Augmentation and Other Actions (DWR Table 8-2 Retail) ............................................ 7 Table 4. Demand Reduction Actions (DWR Table 8-3 Retail) ................................................................. 8

LIST OF ACRONYMS AND ABBREVIATIONS
AB Assembly Bill 1
AF Acre-Feet 6
AWSDA Annual Water Supply and Demand Assessment 2
City City of Napa 1
County Napa County 3
CRMM Community Relations & Media Manager
CWC California Water Code 2
Delta Sacramento-San Joaquin Delta 1
DWR Department of Water Resources 2
ERP Emergency Response Plan 10
FEMA Federal Emergency Management Agency 11
GPCD Gallons Per Capita Per Day
HMP Hazard Mitigation Plan 11
MGD Million Gallons Per Day 10
NMC Napa Municipal Code 1
PIO Public Information Officer 12
RRA Risk and Resilience Assessment 12
SB Senate Bill 1
SEMS Standardized Emergency Management System 10
Supervisor Water Treatment Facility Supervisor 15
SWP State Water Project 1
USGS United States Geological Survey 11
UWMP Urban Water Management Plan 1
WSCP Water Shortage Contingency Plan 1
WTP Water Treatment Plant
ATTACHMENT 3

N-C-424-60-26-28-WP-R-424-2025UWMP
1 City of Napa
Last Revised: 05-19-26
2 City of Napa
Water Shortage Contingency Plan

Water shortages occur whenever the available water supply cannot meet the normally expected customer water demand. This can be due to several reasons, such as climate change, drought, and catastrophic events. Drought, regulatory action constraints, and natural and manmade disasters may occur at any time.

In 2018, the California State Legislature (Legislature) enacted two policy bills (Senate Bill (SB) 606 [Hertzberg] and Assembly Bill (AB) 1668 [Friedman]) (2018 Water Conservation Legislation) to establish a new foundation for long-term improvements in water conservation and drought planning to adapt to climate change and the resulting longer and more intense droughts in California. The 2018 Water Conservation Legislation set new requirements for water shortage contingency planning.

This Water Shortage Contingency Plan (WSCP) describes the City of Napa’s (City) strategic plan for preparing for and responding to water shortages, including defining water shortage stages and associated shortage response actions. This WSCP provides a guide for the City to proactively prevent catastrophic service disruptions and addresses the 2018 Water Conservation Legislation requirements. As part of this WSCP, the City ’s legal authorities, communication protocols, compliance and enforcement, and monitoring and reporting are described. Chapter 13.10 of the Napa Municipal Code (NMC) describes the City’s WSCP actions.

The City intends for this WSCP to be dynamic so that it may assess response action effectiveness and adapt to emergencies and catastrophic events. Refinement procedures to this WSCP are provided to allow the City to modify this WSCP outside of the Urban Water Management Plan (UWMP) process.

1.0 WATER SUPPLY RELIABILITY ANALYSIS
The City’s water supply planning analysis and reliability are documented in the most recent UWMP. The UWMP provides a comprehensive assessment of existing and projected water demands (Chapter 4), existing and planned water supplies by source (Chapter 6), water supply reliability assessment and the Drought Risk Assessment (Chapter 7), and seismic risk assessment and mitigation planning (Chapter 8).

To proactively manage for a potential water shortage, the City conducts an annual water supply and demand assessment as described in Section 2.0.

2.0 ANNUAL WATER SUPPLY AND DEMAND ASSESSMENT PROCEDURES Beginning July 1, 2022, California Water Code (CWC) Section 10632.1 required water suppliers to submit an Annual Water Supply and Demand Assessment (AWSDA) and an Annual Water Shortage Assessment Report to the Department of Water Resources (DWR) . This section provides the procedures for the City to conduct its AWSDA, which informs the City’s Annual Water Shortage Assessment Report and assists the City with planning for potential water supply shortages. The objective of the AWSDA is to forecast near- term supply conditions so that the City can prepare logistically and financially for any anticipated water supply constraints, as well as enact appropriate shortage response actions in a timely manner.

This section provides the decision-making process, key data inputs, and methodology necessary for the City to produce its AWSDA. This includes steps the City may take to declare a water shortage emergency and associated water shortage stage (see Section 3.0) and implement water shortage response actions (see Section 4.0).

ATTACHMENT 3

Water Shortage Contingency Plan

N-C-424-60-26-28-WP-R-424-2025UWMP
2 City of Napa
Last Revised: 05-19-26

2.1 Decision-Making Process
The City will use the decision -making process described below to consistently produce its AWSDA. The City may adjust and improve this process as needed.

The Deputy Utilities Director (or designee) is responsible for preparing the City’s AWSDA and Annual Water Shortage Assessment Report and submitting them to DWR by July 1st of each year. Their team will gather key data inputs described in Section 2.2 and conduct the assessment in accordance with Section 2.3. In May of each year, the Deputy Utilities Director will finalize the AWSDA based on that year’s final SWP allocation. The AWSDA and Annual Water Shortage Assessment Report will be presented to the Utilities Director for review and approval.

To conduct the AWSDA, the Deputy Utilities Director (or designee) will follow the schedule of activities shown in Table 1 . for conducting the AWSDA and decision making . Due to variations in climate and hydrologic conditions, the timeframes shown in the table are approximate and may be adjusted as needed. The City intends to implement shortage response actions to effectively address anticipated water shortage conditions in a timely manner while complying with the State’s reporting requirements.

Table 1. Schedule of AWSDA and Decision-Making Activities Schedule Task
Activity or
Decision
Responsible
Party
AWSDA Activities
April
Determine available water supply for current year and
one subsequent dry year. Describe sources and
quantities considering factors affecting supply as
described in Section 2.2.

Activity
Deputy Utilities
Director or
designee
April
Determine water demands for current year and one
subsequent dry year. Describe demand types and
quantities considering factors affecting demands as
described in Section 2.2.

Activity
Deputy Utilities
Director or
designee
Early May
Using the methodology described in Section 2.3,
calculate the City’s water supply reliability for the
current year and one subsequent dry year.

Activity
Deputy Utilities
Director or
designee
Mid-May
Complete the AWSDA and Annual Water Shortage
Assessment Report based on expected water
deliveries, including the year’s final SWP allocation.

Submit to Utilities Director for review.

Activity
Deputy Utilities
Director or
designee
Mid-May Review the AWSDA and Annual Water Shortage
Assessment Report and provide comments, if needed. Activity Utilities Director Late May Finalize the AWSDA and Annual Water Shortage
Assessment Report. Prepare City Council agenda item. Activity Deputy Utilities
Director or
designee
June Receive the final AWSDA and Annual Water Shortage
Assessment Report. Activity City Council
ATTACHMENT 3

Water Shortage Contingency Plan

N-C-424-60-26-28-WP-R-424-2025UWMP
3 City of Napa
Last Revised: 05-19-26

Table 1. Schedule of AWSDA and Decision-Making Activities Schedule Task
Activity or
Decision
Responsible
Party
Decision-Making Activities If the AWSDA Shows Available Supply May Not Meet Expected Demands Mid-May
Based on finalized determinations of the AWSDA
regarding water shortage condition and recommended
actions, prepare recommendations on water shortage
condition determination and actions.

Decision Deputy Utilities
Director
Mid-May Prepare ordinances or resolutions approving
determinations and actions. Decision Deputy Utilities
Director
Mid-May
Coordinate interdepartmentally, with the region’s
water service providers, and with Napa County for the
possible proclamation of a local emergency.

Decision Utilities Director
Late
May/Early
June
Present finalized determinations and
recommendations to the City Council, along with
ordinances or resolutions approving determinations
and actions.

Activity Utilities Director
June
Receive presentation of finalized determinations and
recommendations. Make determination of degree of
emergency and act on resolutions that declare a water
shortage emergency condition. Authorize water
shortage response actions for implementation.

Decision City Council
June
Revise the AWSDA and Annual Water Shortage
Assessment Report to include City Council
determinations and approved actions.

Activity
Deputy Utilities
Director or
designee
After City
Council
Meeting
If a water shortage emergency condition is declared,
implement the WSCP and the water shortage response
actions as approved by the City Council.

Decision Utilities Director
AWSDA and Report Submittal
On or before
July 1
Submit the final AWSDA and Annual Water Shortage
Assessment Report to DWR. Activity
Deputy Utilities
Director or
designee

2.1.1 AWSDA Finding: Sufficient Water Supply to Meet Expected Demands If the AWSDA finds that available water supply will be sufficient to meet expected demands for the current year and one subsequent dry year, no further action is required. City staff will submit the Annual Water Shortage Assessment Report to DWR by July 1st of each year.

2.1.2 AWSDA Finding: Available Water Supply Will Not Meet Demands Should the AWSDA find that available supply will not meet expected demands, the City will coordinate internally, with the region’s other water service providers, and with Napa County (County) for the possible proclamation of a local emergency. The Utilities Director will present the finalized assessment to the City Council, along with recommendations on water shortage condition determination and actions.

Recommended actions may include declaration of a water shortage emergency, declaration of a water shortage stage, and water shortage actions.

ATTACHMENT 3

Water Shortage Contingency Plan

N-C-424-60-26-28-WP-R-424-2025UWMP
4 City of Napa
Last Revised: 05-19-26

Based on the findings of the AWSDA, the City Council will determine if a water shortage condition exists and, if needed, adopt a resolution declaring a water shortage emergency and an associated water shortage stage and authorizing water shortage actions. The Deputy Utilities Director (or designee) will then update the City’s Annual Water Shortage Assessment Report, incorporating City Council determinations and approved actions.

2.2 Key Data Inputs
The State requires that the AWSDA evaluate supplies and demands for, at a minimum, the current year and one subsequent dry year. The planned water supply and demand for the current year and a subsequent dry year will be used to evaluate the City’s water supply reliability.

In planning for water supplies, the following factors are considered as applicable and appropriate:

1. SWP annual supply allocation

2. Lake Hennessey and Milliken Reservoir storage levels

3. Options for supplemental water purchases

4. Hydrological conditions

5. Regulatory conditions

6. Contractual constraints

7. Surface water quality

8. Infrastructure capacity constraints or changes

9. Capital improvement project implementation
Planned water supply sources and quantities will be described and be reasonably consistent with the supply projections in Chapter 6 (Normal-Year Water Supply Characterization) of the City’s most recent UWMP. Should supply sources and projections differ significantly between the AWSDA and the UWMP, the City will explain the difference.

The AWSDA will examine u nconstrained water demands, which are customer demands where no water conservation measures are in effect. In planning for water demands, the following factors are considered as applicable and appropriate:

1. Weather conditions

2. Water year type

3. Population changes (e.g., due to development projects)

4. Demand trends and anticipated new demands (e.g., changes to land use)

5. Pending policy changes that may impact demands

6. Infrastructure operations
Planned water demand types and quantities will be described and should be reasonably consistent with the demand projections in Chapter 4 (Water Use Characterization ) of the City ’s most recent UWMP.

Should demand projections deviate significantly between the AWSDA and the UWMP, the City will explain the difference.

ATTACHMENT 3

Water Shortage Contingency Plan

N-C-424-60-26-28-WP-R-424-2025UWMP
5 City of Napa
Last Revised: 05-19-26

2.3 Assessment Methodology
In preparing the AWSDA, the City will use the following assessment methodology and criteria to evaluate the City's water supply reliability for the current year and following one dry year.

The City uses a spreadsheet to plan for current year and future year supplies and demands. Planned supply and demand inputs described in Section 2.2 will be entered in the spreadsheet in annual increments. As needed, the increments may be revised to monthly or seasonal periods to more closely evaluate specific conditions and needs.

Supply and demand will be compared to determine the City’s water supply reliability in the current year and the following one dry year. The City’s water supply will be deemed reliable if it can meet planned water demands in both the current year and the following dry year. If water supply cannot meet planned water demands in the current year or the following dry year, the extent of the water shortage condition will be determined, and the City will prepare response actions in accordance with this WSCP.

Findings from the AWSDA will be presented to the City Council for consideration , along with recommendations for action.

3.0 SIX STANDARD WATER SHORTAGE LEVELS
To provide a consistent regional and statewide approach for conveying the relative severity of water supply shortage conditions, the 2018 Water Conservation Legislation mandates that water suppliers plan for six standard water shortage levels that correspond to progressive reductions of up to 10, 20, 30, 40, 50 percent, and greater than 50 percent from the normal reliability condition. Each shortage condition should correspond to additional actions water suppliers would implement to meet the severity of the impending shortages.

For each of the State’s standard shortage levels (also called “ stages”), Table 2 summarizes the water shortage range (i.e., percent shortage from normal supplies) for each stage. These water shortage stages apply to both foreseeable and unforeseeable water supply shortage conditions.

As described in Section 2.0, the City will conduct an AWSDA to determine its water supply condition for the current year and the following one dry year. Preparing the AWSDA helps the City ascertain the need to declare a water shortage emergency and water shortage condition. In other cases, the City may need to declare a water shortage emergency due to unforeseen water supply interruptions. When the City anticipates or identifies that water supplies may not be adequate to meet the normal water demands of its customers, the City Council may determine that a water shortage exists and consider a resolution to declare a water shortage emergency and associated stage. The shortage stage provides direction on shortage response actions.

ATTACHMENT 3

Water Shortage Contingency Plan

N-C-424-60-26-28-WP-R-424-2025UWMP
6 City of Napa
Last Revised: 05-19-26

Table 2. Water Shortage Contingency Plan - Shortage Levels Shortage
Level
Percent
Shortage
Range Water Shortage Condition Definition Shortage Response Actions 1 Up to 10%
Insufficient carryover storage and
supplemental water to provide for 90%
of normal supplies.

Voluntary conservation; implement
actions per Table 4
2 Up to 20%
Insufficient carryover storage and
supplemental water to provide for 80%
of normal supplies.

Voluntary or mandatory conservation;
implement actions per Table 4
3 Up to 30%
Insufficient carryover storage and
supplemental water to provide for 70%
of normal supplies.

Mandatory conservation; implement
actions per Table 4
4 Up to 40%
Insufficient carryover storage and
supplemental water to provide for 60%
of normal supplies.

Mandatory conservation; implement
actions per Table 4
5 Up to 50%
Insufficient carryover storage and
supplemental water to provide for 50%
of normal supplies.

Mandatory conservation; implement
actions per Table 4
6 >50%
Insufficient carryover storage and
supplemental water to provide for less
than 50% of normal supplies.

Mandatory conservation; implement
actions per Table 4

4.0 SHORTAGE RESPONSE ACTIONS AND EFFECTIVENESS
CWC Section 10632 (a)(4) requires shortage response actions that align with the defined shortage levels.

The City’s shortage response actions consist of a combination of supply augmentation, demand reduction, and operational changes. The specific suite of response actions implemented depends on the event that precipitates a water shortage condition, the time of the year the event occurs, the water supply sources available, and the condition of the City’s water system infrastructure. In general, the City plans to use a balanced and dynamic approach, adapting its response actions to meet the water use goals associated with the declared water shortage condition.

The City will trac k progress toward water use reduction goals by analyzing weekly or monthly water production. The analysis will compare the drought production with the previous non-drought production to obtain a percent reduction. The City will increase or decrease its public outreach efforts based on observed usage reduction.

The shortage response actions discussed below may be considered tools that allow the City to respond to water shortage conditions. These actions are in addition to State mandated water conservation requirements at any water shortage stage. The City will implement both State-mandated prohibitions and its own actions.

ATTACHMENT 3

Water Shortage Contingency Plan

N-C-424-60-26-28-WP-R-424-2025UWMP
7 City of Napa
Last Revised: 05-19-26

Because the City may continuously monitor and adjust its response actions to reasonably equate demands with available supply, the extent to which implementation of each action reduces the gap between water supplies and water demand is difficult to quantify and thus only estimated. Certain response actions, such as public outreach and enforcement, boost the effectiveness of other response actions and do not have a quantifiable effect on their own.

4.1 Supply Augmentation and Other Actions
Chapter 6 of the City’s most recent UWMP describes the City’s normal-year water supply portfolio, which includes local surface water and imported water through the SWP. In emergencies, the City can receive water via intertie connections with the Cities of American Canyon, St. Helena, and Calistoga, and the Town of Yountville. In dry years, the City may participate in the DWR Dry Year Transfer Program or the Yuba Accord Dry Year Water Purchase Program to bolster supplies. Table 3 summarizes the City's supply augmentation and other actions.

Table 3. Supply Augmentation and Other Actions (DWR Table 8-2 Retail)

4.2 Demand Reduction
Using lessons learned from the 2021-2023 drought, the City codified its Water Shortage Contingency Plan in NMC Chapter 13.10, while also clarifying and updating its permanent water wast e prohibitions in NMC Chapter 13.09. During water shortage conditions, the City plans to reduce demand by implementing the actions described in NMC Chapters 13.09 and 13.10, shown here in Table 4. Demand reduction actions are organized by the triggering water shortage stage, and each action includes an estimate of how much its implementation will reduce the shortage gap. For each demand reduction action, Table 4 also indicates if the City uses compliance actions such as penalties, charges, or other enforcement. Demand reduction actions are only listed in Table 4 in the stage when they are first implemented. The City will continue to use these actions in higher stages unless otherwise noted.

Yes
Volume or
Percentage
Drop down
Shortage Gap
Reduction Value
(May be a range) (AF)
1 No action at this shortage level
2 No action at this shortage level
3 Implement or Modify Drought Rate
Structure or Surcharge Percentage 10-15% If determined necessary by City Council and set by resolution
4 Transfers Volume Market-dependent SWP Dry Year Transfer Program 5 Other Purchases Volume Market-dependent Yuba Accord Dry Year Purchase Program 6 Other Actions (describe) Volume Market-dependent Intertie connections with other Napa County cities
Is the Supplier completing this table using the standard six levels? (yes/no) 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
How much is this going to reduce the
shortage gap?
Additional Explanation or Reference
(OPTIONAL)
Add additional rows as needed
ATTACHMENT 3

Water Shortage Contingency Plan

N-C-424-60-26-28-WP-R-424-2025UWMP
8 City of Napa
Last Revised: 05-19-26

Table 4. Demand Reduction Actions (DWR Table 8-3 Retail)

Yes
Volume or Percentage
Drop down
Shortage Gap
Reduction Value
(May be a range) (AF)
1 Expand Public Information Campaign Boosts effectiveness of other, quantifiable actions No 1 Offer Water Use Surveys Percentage 0-2% Standard offering for water customers No 1 Provide Rebates on Plumbing Fixtures
and Devices Percentage 0-2% Standard offering for water customers No 1 Provide Rebates for Landscape
Irrigation Efficiency Percentage 0-2% Standard offering for water customers No 1 Provide Rebates for Turf Replacement Percentage 0-5% Standard offering for water customers No 1 Other - Require automatic shut of hoses Percentage 0-1% Yes 1 Other - Prohibit use of potable water
for washing hard surfaces Percentage 0-1% Yes
1 Landscape - Restrict or prohibit runoff
from landscape irrigation Percentage 0-2% Yes
1 Landscape - Other landscape restriction
or prohibition Percentage 0-1% Prohibit landscape irrigation during and within 48 hours after a quarter inch or more rain event Yes
1 Other - Customers must repair leaks,
breaks, and malfunctions in a timely
manner
Percentage 0-1% Yes
1 Landscape - Limit landscape irrigation
to specific times Percentage 0-2% Prohibit landscape irrigation between 10:00 am and 5:00 pm Yes
2 Increase Water Waste Patrols Percentage 0-3% Yes
2 Landscape - Limit landscape irrigation
to specific days Percentage 0-10% Prohibit landscape irrigation on consecutive days, except for needs of newly planted Yes
2 Other water feature or swimming pool
restriction Percentage 0-2% Prohibit draining and refilling of pools or decorative ponds unless needed for repair Yes
2 CII - Restaurants may only serve water
upon request Percentage 0-1% Yes
2 CII - Lodging establishment must offer
opt out of linen service Percentage 0-1% Yes
3 Landscape - Limit landscape irrigation
to specific days Percentage 5-20% Landscape irrigation limited to two days per week Yes 3 Implement or Modify Drought Rate
Structure or Surcharge Percentage 10-20% If determined necessary and set by City Council Yes 3 Pools and Spas - Require covers for
pools and spas Percentage 0-1% Yes
4 Landscape - Limit landscape irrigation
to specific days Percentage 15-25% Landscape irrigation limited to one day per week Yes 4 Other Volume TBD
Maximum bimonthly water use allocations for
customers, if determined necessary and set by City
Council
Yes
4 Other Volume 1-5 million gallons per
month
Interruptible-Surplus Agricultural Water services
suspended Yes
4 Other - Prohibit use of potable water
for construction and dust control Percentage 0-1% Yes
4 Other water feature or swimming pool
restriction Percentage 0-1% Prohibit filling of any decorative lakes or ponds Yes 4 Other - Prohibit vehicle washing except
at facilities using recycled or
recirculating water
Percentage 0-1% Yes
5 Landscape - Prohibit all landscape
irrigation Percentage 15-35% Yes
5 Landscape - Other landscape restriction
or prohibition Percentage 1-4% Prohibit installation of new or replacement turf Yes 5 CII - Other CII restriction or prohibition Percentage 1-2% Prohibit use of water for street cleaning, line flushing, fire sprinkler testing, firefighter training Yes
5 Other Percentage 2-5% Implement special water conservation plans for largest water users, if determined necessary Yes
6 Landscape - Prohibit all landscape
irrigation Percentage 5-10% Remove previous exceptions for drip and micro- spray, hand watering, irrigation system testing Yes
6 Other water feature or swimming pool
restriction Percentage 0-2% Prohibit draining and refilling of all pools or spas, or filling new pools. No exceptions. Yes
6 Other Percentage 1-2% Prohibit all agricultural irrigation Yes Is the Supplier completing this table using the standard six levels? (yes/no) 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.

How much is this going to reduce the shortage
gap?
Additional Explanation or Reference
(OPTIONAL)
Penalty, Charge, or
Other
Enforcement?
For Retail Suppliers Only
Drop Down List
Add additional rows as needed
NOTES: Actions introduced in a lower shortage level will also be used in higher shortage levels unless otherwise noted.

ATTACHMENT 3

Water Shortage Contingency Plan

N-C-424-60-26-28-WP-R-424-2025UWMP
9 City of Napa
Last Revised: 05-19-26

The City will monitor water production, water demands, and changing conditions to determine the intensity of its public outreach, the extent of its enforcement actions, and the need to adjust its water shortage condition declaration as discussed in Section 9.0.

4.3 Operational Changes
The City can make several operational changes to address a water shortage, including increasing water waste patrols and decreasing line flushing and flow testing (e.g., for fire sprinkler design or training of firefighting personnel). While the City always seeks to reduce water losses, these actions will further those efforts during a shortage. These operational changes are included in Table 4, as they either directly or indirectly reduce demands. Capital improvement projects can also be delayed or accelerated as needed.

4.4 Emergency Response Plan
As stated in Section 3.0, the City’s water shortage stages outlined in Table apply to both foreseeable and unforeseeable water supply shortage conditions . The latter includes catastrophic water shortage conditions, which are addressed in the City’s Emergency Response Plan (ERP). The ERP, updated in 2025 for compliance with America’s Water Infra structure Act , outlines preparation, response, and recovery procedures associated with unforeseeable incidents such as water supply contamination, earthquake s, infrastructure failure, and other events. Due to the confidential nature of the ERP, the document is not included with this plan, but some key provisions are discussed below.

For significant disasters, the City uses the Standardized Emergency Management System (SEMS) to allow rapid and effective coordination in the field. For example, in a major earthquake event, all Water Division employees fall under the Utilities Department’s direction, the Operations section as defined by SEMS. The ERP includes these chain-of-command details for incidents, along with mutual aid agreements, emergency resources, emergency water supply calculations, and public notification procedures.

The South Napa Earthquake of August 24, 2014 provided a real -life exercise for the City’s ERP. None of the three water treatment plants (WTPs) were significantly damaged or forced offline during that event, but main breaks caused customer outages.

The Water Division has developed a redundant system in the event of a disaster. The main points of this redundant system are:

1. The City has two major WTPs, each capable of producing 20 million gallons per day (MGD).

2. Each WTP has its own auxiliary power supply.

3. Each WTP has its own raw water source.

4. The two WTPs are more than 20 miles apart, which reduces the risk of a single event affecting both plants simultaneously.

5. Both WTPs were designed with redundant process components.

In the extremely unlikely event that the City loses all its water sources at once, the system’s tank storage capacity of approximately 29 million gallons can help the City respond to the emergency. The City’s best security in an extreme emergency may be the ability to deliver raw water to its customers from both Lake Hennessey and Milliken Reservoir. That allows the City to provide water for fire protection even if the pipelines have numerous leaks. The raw water would also be available for human consumption as long as it was boiled or treated with iodine.

ATTACHMENT 3

Water Shortage Contingency Plan

N-C-424-60-26-28-WP-R-424-2025UWMP
10 City of Napa
Last Revised: 05-19-26

With some events, it could be necessary for the City to use an emergency supply source to maintain system pressure. The City has intertie connections with the Cities of American Canyon, St. Helena, and Calistoga, and the Town of Yountville. The City of American Canyon can supply the City with approximately 4 MGD for a limited time.

Overall, the ERP points out the flexible design of the water system and the City’s ability to minimize service disruptions in the worst of emergencies. For all conceivable emergencies, a specific plan is in place to rapidly restore water service, ensure water for firefighting, and minimize adverse impacts on public health and safety.

4.5 Seismic Risk Assessment and Mitigation Plan
CWC Section 10632.5(a) requires that UWMPs include a seismic risk assessment and mitigation plan to assess and mitigate a water system’s seismic vulnerabilities. Seismic risks that may affect water supply reliability are evaluated in Chapter 8 of the City’s most recent UWMP and are incorporated into the City’s overall water shortage response planning.

5.0 COMMUNICATION PROTOCOLS
In the event of a water shortage, the City must inform its customers, the general public and interested parties, and local, regional, and state entities. Communication protocols for foreseeable and unforeseeable events are provided in this section. In any event, timely and effective communication must occur for appropriate response to the event. Key City staff communicate via radio or cell phones, and all City staff are provided email accounts to communicate internally and externally.

5.1 Communication for Foreseeable Events
A water shortage may be foreseeable when the City prepares its AWSDA, as described in Section 2.0.

When the City determines the potential of a water shortage event, the City Council may declare a water shortage emergency.

If a water shortage emergency is anticipated, City staff will coordinate interdepartmentally, with the region’s water service providers, and with the County for the possible proclamation of a local emergency.

If needed, City staff will communicate with the appropriate State agencies regarding the water shortage emergency.

In a duly noticed meeting, the City Council will receive a presentation of the current or predicted shortage as determined by the AWSDA. T he City Council will determine if a water shortage emergency condition exists and the degree of the emergency , while considering the shortage response actions triggered or anticipated to be triggered by the shortage level. As necessary, the City Council will act on the water shortage emergency declaration, associated water shortage stage, and shortage response actions.

If the City Council declares a water shortage emergency, t he Community Relations & Media Manager (CRMM) and City staff will coordinate to communicate with its customers and the public to inform them about the declared water shortage emergency, water shortage level, and authorized water use restrictions. The City may use any combination of the following outreach formats: newspaper publications, mailers, bill stuffers, door hangers, newsletters, social media, its website, local radio, public event appearances, mobile lighted message signs, and press releases.

ATTACHMENT 3

Water Shortage Contingency Plan

N-C-424-60-26-28-WP-R-424-2025UWMP
11 City of Napa
Last Revised: 05-19-26

5.2 Communication for Unforeseeable Events
A w ater shortage may occur during unforeseeable events such as earthquakes, fires, infrastructure failures, civil unrest, and other catastrophic events. The City’s ERP provides specific communication protocols and procedures to convey water shortage contingency planning actions during these events.

The City may trigger any of these communication protocols at any water shortage stage, depending on the event.

In general, communications and notifications should proceed along the chain of command. Notification decisions will be made under the direction of the Director of Emergency Services, with external communications managed by the CRMM. The ERP provides a list of relevant contacts to notify at the local, regional, and state level.

The CRMM is the official spokesperson for the City and is responsible for establishing an information center and providing information for news media. In addition, the CRMM maintains a list of contacts to disseminate information to the public, typically via electronic media, radio, television, or newspapers.

6.0 COMPLIANCE AND ENFORCEMENT
After the City Council declares a water shortage emergency and adopts a water shortage condition , customers will be notified as described in Section 5.0. NMC Chapter 13.10 includes demand reduction actions and compliance and enforcement measures the City may implement when a water shortage is declared.

The Utilities Director is authorized to issue administrative citations for violations of demand reduction actions as noted in Table . After an initial educational warning, escalating fines may be imposed for repeated violations. Exceptions to demand reduction actions may be requested in writing , with the customer providing sufficient information, documentation, and verification, which establishes that the requested exception is necessary in order to: (1) protect the public health or safety, or (2) avoid undue hardship (including adverse economic impacts such as loss of prod uction or jobs). The request shall also document that all feasible conservation measures are being used, and that there are no alternative available sources of water. The request shall be subject to the review and approval of the Utilities Director, whose decision will be final.

7.0 LEGAL AUTHORITIES
NMC Chapter 2.89 includes provisions related to the preparation and implementation of plans in the event of local emergencies. NMC Chapter s 13.09 and 13 .10 support the City’s water shortage contingency actions. Th ese chapters include provisions for declaring a water shortage emergency, determining customer use reductions, water use regulations and restrictions, and compliance and enforcement.

When a water shortage is determined, the City will coordinate with the region’s other water service providers and the County for the possible proclamation of a local emergency in accordance with California Government Code, California Emergency Services Act (Article 2, Section 8558).

ATTACHMENT 3

Water Shortage Contingency Plan

N-C-424-60-26-28-WP-R-424-2025UWMP
12 City of Napa
Last Revised: 05-19-26

In a duly noticed meeting, the City Council will determine whether a water shortage emergency condition exists and, if so, the degree of the emergency and what regulations and restrictions should be enforced in response to the shortage. The City shall declare a water shortage emergency in accordance with CWC Chapter 3 of Division 1.

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

The water shortage emergency declaration triggers communication protocols described in Section 5.0 and compliance and enforcement actions described in Section 6.0.

8.0 FINANCIAL CONSEQUENCES OF WSCP
Pursuant to CWC Section 10632(a)(8)(C), the City complies with CWC Section 366 by prohibiting excessive residential water use during declared drought emergencies through the allocation and excess water use charge provisions of NMC Chapter 13.10. During water shortages, revenue is expected to decrease due to reduced customer consumption. Implementation of these provisions requires administrative, billing system, monitoring, enforcement, and appeal procedures, which generate compliance -related costs in addition to the broader financial impacts of drought conditions. To compensate for lost revenue and possible increase in expenditures, the City may need to use drought rates or financial reserves to maintain fiscal health. Both components are discussed in this section.

8.1 Drought Rate Structures and Surcharges
Current standard water rates are available on the City’s website.1 Standard rates consist of a fixed service charge based on meter size and a water quantity charge. For single-family residential customers, the water quantity charge is tiered , with higher rates charged for greater amount s of water consumed . The City reserves the right to change the water rate structure during a declared water shortage to more strongly encourage customers to reduce water use, to help cover water system costs, and to protect the financial stability of the water system as water demands are reduced.

Beginning with water shortage Stage 3, the City shall implement a drought rate structure or surcharge on water sales as set by a resolution of the City Council, in accordance with Proposition 218 , if determined to be necessary (NMC Chapter 13.10).

8.2 Use of Financial Reserves
As part of the Water Fund, the City maintains an Emergency Reserve, a Water Supply Reserve, and a Stabilization Reserve. In the event of a significant drop in revenue during a drought, these funds are available to maintain operations and potentially augment supplies to reduce the water shortage. To compensate for loss of revenue from reduced water sales and increased staffing for the water shortage response effort, the reserves may be employed in water shortage Stages 4 through 6.

1 https://www.cityofnapa.org/606/Rate-Schedules
ATTACHMENT 3

Water Shortage Contingency Plan

N-C-424-60-26-28-WP-R-424-2025UWMP
13 City of Napa
Last Revised: 05-19-26

9.0 MONITORING AND REPORTING
The City’s water system is fully metered, from its water supply sources to individual customer meters.

Meters may be used as monitoring tools for compliance and reporting purposes. Production meters at the three WTPs provide a systemwide overview of water supply and demand.

In normal -year water supply conditions, production figures are recorded daily. Production t otals are reported daily to the Water Treatment Manager and weekly to the Deputy Utilities Director . During a Stage 1, 2, or 3 water shortage, the Supervisor compares the weekly production to the target to verify that the demand reduction goal is being met. If reduction goals are not met, the Deputy Utilities Director will notify the City Council so that corrective action can be taken. The City Council receives monthly production reports during Stage 1, 2, or 3 water shortages. In Stage 4 and higher, the same procedure is followed, with the addition of a daily production report to the Deputy Utilities Director.

Customer meters are used to determine adherence to any water allocations implemented at Stage 4 of a water shortage. This metered usage data will allow the City to adjust public outreach, enforcement, and other water shortage response actions as needed to meet available supplies.

The State Water Resources Control Board requires monthly reporting of water production and demand reduction measures , along with associated enforcement metrics. The City regularly records its water meter readings, along with enforcement actions, ensuring that the City is able to comply with these reporting requirements.

10.0 WSCP REFINEMENT PROCEDURES
This WSCP is an adaptive management plan. It is subject to refinements as needed to ensure that the City’s shortage response actions and mitigation strategies are effective and produce the desired results.

Based on monitoring described in Section 9.0 and the need for compliance and enforcement actions described in Section 6.0, the City may adjust its response actions and modify its WSCP . The City will also seek input from staff and the public regarding the effectiveness of its WSCP and ideas for improvements.

When a revised WSCP is proposed, the revised WSCP will undergo the process descri bed in Section 12.0 for adoption by the City Council and distribution to the County and the general public.

11.0 SPECIAL WATER FEATURE DISTINCTION
The City distinguishes special water features, such as decorative lakes and ponds, differently from pools and spas. Special water features are regulated separately. Regulations under NMC Chapter 13.10 prohibit the use of potable water to fill decorative lakes or ponds.

12.0 PLAN ADOPTION, SUBMITTAL, AVAILABILITY, AND AMENDMENT This WSCP is adopted concurrently with the City’s 2025 UWMP, by separate resolution. Prior to adoption, a duly noticed public hearing was conducted. An electronic copy of this WSCP will be submitted to DWR within 30 days of adoption.

No later than 30 days after submittal to DWR, copies of this WSCP will be available at the Utilities Department, City Hall, and at the Napa County Library. A copy will also be provided to the County. An electronic copy of this WSCP will also be available for public review and download on the City’s website.

ATTACHMENT 3

UWMP and WSCP Adoption Resolutions

Not included with this submittal.

Appendix K
ATTACHMENT 3

Concord Phoenix
1001 Galaxy Way, Suite 310
Concord CA 95420
925-949-5800
4505 E Chandler Boulevard, Suite 265
Phoenix AZ 85048
602-337-6110
Davis Pleasanton
2020 Research Park Drive, Suite 100
Davis CA 95618
530-756-5905
6800 Koll Center Parkway, Suite 150
Pleasanton CA 94566
925-426-2580
Irvine Sacramento
25 Edelman, Suite 120
Irvine, CA 92618
949-420-3030
100 Howe Avenue, Suite 110S
Sacramento CA 95825
916-306-2250
Lake Oswego San Diego
5 Centerpointe Drive, Suite 130
Lake Oswego OR 97035
503-451-4500
11545 West Bernardo Court, Suite 209
San Diego CA 92127
858-505-0075
Medford Santa Rosa
3235 Hillcrest Park Drive, Suite 106
Medford OR 97504
458-299-0843
2235 Mercury Way, Suite 105
Santa Rosa CA 95407
707-543-8506
Oceanside
804 Pier View Way, Suite 100
Oceanside CA 92054
760-795-0365

ATTACHMENT 3