Corona City Council
June 3, 2026

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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

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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

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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

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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

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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.
(E) A detailed description and analysis of the amount and location of groundwater that is projected to be pumped by the urban water

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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

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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

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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

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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

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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 fiveyear 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

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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

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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

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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.

Appendices
City of Corona
2025 Urban Water Management Plan
Appendix B - Sustainable Water Use and Demand Reduction (SB X7- 7)

City of Corona
2020 Urban Water Management Plan
The following was included in the City of Corona 2015 UWMP as Appendix C. This document presents the Water Code sections associated with the Sustainable Water Use and Demand Reduction (SB X7-7).

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Appendix C – California Water Code: Water Conservation Act (aka SB X7-7) Corona 2015 Urban Water Management Plan
California Water Code
Sustainable Water Use and Demand Reduction
California Water Code Division 6, Part 2.55.

Chapter 1. General Declarations and Policy §10608‐10608.8 Chapter 2. Definitions §10608.12
Chapter 3. Urban Retail Water Suppliers §10608.16‐10608.44 Chapter 4. Agricultural Water Suppliers §10608.48
Chapter 5. Sustainable Water Management §10608.50
Chapter 6 Standardized Data Collection §10608.52
Chapter 7 Funding Provisions §10608.56‐10608.60
Chapter 8 Quantifying Agricultural Water Use Efficiency§10608.64 Chapter 1. General Declarations and Policy
SECTION 10608-10608.8
10608. The Legislature finds and declares all of the following:
(a) Water is a public resource that the California Constitution protects against waste and unreasonable use.
(b) Growing population, climate change, and the need to protect and grow California's economy while protecting and restoring our fish and wildlife habitats make it essential that the state manage its water resources as efficiently as possible.
(c) Diverse regional water supply portfolios will increase water supply reliability and reduce dependence on the Delta.
(d) Reduced water use through conservation provides significant energy and environmental benefits, and can help protect water quality, improve streamflows, and reduce greenhouse gas emissions.
(e) The success of state and local water conservation programs to increase efficiency of water use is best determined on the basis of measurable outcomes related to water use or efficiency.
(f) Improvements in technology and management practices offer the potential for increasing water efficiency in California over time, providing an essential water management tool to meet the need for water for urban, agricultural, and environmental uses.
(g) The Governor has called for a 20 percent per capita reduction in urban water use statewide by 2020.

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(h) The factors used to formulate water use efficiency targets can vary significantly from location to location based on factors including weather, patterns of urban and suburban development, and past efforts to enhance water use efficiency. (i) Per capita water use is a valid measure of a water provider's efforts to reduce urban water use within its service area. However, per capita water use is less useful for measuring relative water use efficiency between different water providers. Differences in weather, historical patterns of urban and suburban development, and density of housing in a particular location need to be considered when assessing per capita water use as a measure of efficiency.
10608.4. It is the intent of the Legislature, by the enactment of this part, to do all of the following:
(a) Require all water suppliers to increase the efficiency of use of this essential resource.
(b) Establish a framework to meet the state targets for urban water conservation identified in this part and called for by the Governor. (c) Measure increased efficiency of urban water use on a per capita basis. (d) Establish a method or methods for urban retail water suppliers to determine targets for achieving increased water use efficiency by the year 2020, in accordance with the Governor's goal of a 20-percent reduction.
(e) Establish consistent water use efficiency planning and implementation standards for urban water suppliers and agricultural water suppliers. (f) Promote urban water conservation standards that are consistent with the California Urban Water Conservation Council's adopted best management practices and the requirements for demand management in Section 10631.
(g) Establish standards that recognize and provide credit to water suppliers that made substantial capital investments in urban water conservation since the drought of the early 1990s.
(h) Recognize and account for the investment of urban retail water suppliers in providing recycled water for beneficial uses.
(i) Require implementation of specified efficient water management practices for agricultural water suppliers.
(j) Support the economic productivity of California's agricultural, commercial, and industrial sectors.

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(k) Advance regional water resources management.
10608.8. (a) (1) Water use efficiency measures adopted and implemented pursuant to this part or Part 2.8 (commencing with Section 10800) are water conservation measures subject to the protections provided under Section 1011. (2) Because an urban agency is not required to meet its urban water use target until 2020 pursuant to subdivision (b) of Section 10608.24, an urban retail water supplier's failure to meet those targets shall not establish a violation of law for purposes of any state administrative or judicial proceeding prior to January 1, 2021. Nothing in this paragraph limits the use of data reported to the department or the board in litigation or an administrative proceeding. This paragraph shall become inoperative on January 1, 2021.
(3) To the extent feasible, the department and the board shall provide for the use of water conservation reports required under this part to meet the requirements of Section 1011 for water conservation reporting. (b) This part does not limit or otherwise affect the application of Chapter 3.5 (commencing with Section 11340), Chapter 4 (commencing with Section 11370), Chapter 4.5 (commencing with Section 11400), and Chapter 5 (commencing with Section 11500) of Part 1 of Division 3 of Title 2 of the Government Code.
(c) This part does not require a reduction in the total water used in the agricultural or urban sectors, because other factors, including, but not limited to, changes in agricultural economics or population growth may have greater effects on water use. This part does not limit the economic productivity of California's agricultural, commercial, or industrial sectors.
(d) The requirements of this part do not apply to an agricultural water supplier that is a party to the Quantification Settlement Agreement, as defined in subdivision (a) of Section 1 of Chapter 617 of the Statutes of 2002, during the period within which the Quantification Settlement Agreement remains in effect. After the expiration of the Quantification Settlement Agreement, to the extent conservation water projects implemented as part of the Quantification Settlement Agreement remain in effect, the conserved water created as part of those projects shall be credited against the obligations of the agricultural water supplier pursuant to this part.

Chapter 2 Definitions
SECTION 10608.12
10608.12. Unless the context otherwise requires, the following definitions govern the construction of this part:

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(a) "Agricultural water supplier" means a water supplier, either publicly or privately owned, providing water to 10,000 or more irrigated acres, excluding recycled water. "Agricultural water supplier" includes a supplier or contractor for water, regardless of the basis of right, that distributes or sells water for ultimate resale to customers. "Agricultural water supplier" does not include the department. (b) "Base daily per capita water use" means any of the following:
(1) The urban retail water supplier's estimate of its average gross water use, reported in gallons per capita per day and calculated over a continuous 10- year period ending no earlier than December 31, 2004, and no later than December 31, 2010.
(2) For an urban retail water supplier that meets at least 10 percent of its 2008 measured retail water demand through recycled water that is delivered within the service area of an urban retail water supplier or its urban wholesale water supplier, the urban retail water supplier may extend the calculation described in paragraph (1) up to an additional five years to a maximum of a continuous 15-year period ending no earlier than December 31, 2004, and no later than December 31, 2010. (3) For the purposes of Section 10608.22, the urban retail water supplier's estimate of its average gross water use, reported in gallons per capita per day and calculated over a continuous five-year period ending no earlier than December 31, 2007, and no later than December 31, 2010. (c) "Baseline commercial, industrial, and institutional water use" means an urban retail water supplier's base daily per capita water use for commercial, industrial, and institutional users.
(d) "Commercial water user" means a water user that provides or distributes a product or service.
(e) "Compliance daily per capita water use" means the gross water use during the final year of the reporting period, reported in gallons per capita per day. (f) "Disadvantaged community" means a community with an annual median household income that is less than 80 percent of the statewide annual median household income.
(g) "Gross water use" means the total volume of water, whether treated or untreated, entering the distribution system of an urban retail water supplier, excluding all of the following:
(1) Recycled water that is delivered within the service area of an urban retail water supplier or its urban wholesale water supplier. (2) The net volume of water that the urban retail water supplier places into long- term storage.

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(3) The volume of water the urban retail water supplier conveys for use by another urban water supplier.
(4) The volume of water delivered for agricultural use, except as otherwise provided in subdivision (f) of Section 10608.24. (h) "Industrial water user" means a water user that is primarily a manufacturer or processor of materials as defined by the North American Industry Classification System code sectors 31 to 33, inclusive, or an entity that is a water user primarily engaged in research and development.
(i) "Institutional water user" means a water user dedicated to public service. This type of user includes, among other users, higher education institutions, schools, courts, churches, hospitals, government facilities, and nonprofit research institutions.
(j) "Interim urban water use target" means the midpoint between the urban retail water supplier's base daily per capita water use and the urban retail water supplier's urban water use target for 2020.
(k) "Locally cost effective" means that the present value of the local benefits of implementing an agricultural efficiency water management practice is greater than or equal to the present value of the local cost of implementing that measure.
(l) "Process water" means water used for producing a product or product content or water used for research and development, including, but not limited to, continuous manufacturing processes, water used for testing and maintaining equipment used in producing a product or product content, and water used in combined heat and power facilities used in producing a product or product content. Process water does not mean incidental water uses not related to the production of a product or product content, including, but not limited to, water used for restrooms, landscaping, air conditioning, heating, kitchens, and laundry.
(m)"Recycled water" means recycled water, as defined in subdivision (n) of Section 13050, that is used to offset potable demand, including recycled water supplied for direct use and indirect potable reuse, that meets the following requirements, where applicable:
(1) For groundwater recharge, including recharge through spreading basins, water supplies that are all of the following:
(A) Metered.
(B) Developed through planned investment by the urban water supplier or a wastewater treatment agency.
(C) Treated to a minimum tertiary level.

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(D) Delivered within the service area of an urban retail water supplier or its urban wholesale water supplier that helps an urban retail water supplier meet its urban water use target.
(2) For reservoir augmentation, water supplies that meet the criteria of paragraph (1) and are conveyed through a distribution system constructed specifically for recycled water.
(j) "Regional water resources management" means sources of supply resulting from watershed-based planning for sustainable local water reliability or any of the following alternative sources of water:
(1) The capture and reuse of stormwater or rainwater.
(2) The use of recycled water.
(3) The desalination of brackish groundwater.
(4) The conjunctive use of surface water and groundwater in a manner that is consistent with the safe yield of the groundwater basin. (k) "Reporting period" means the years for which an urban retail water supplier reports compliance with the urban water use targets. (l) "Urban retail water supplier" means a water supplier, either publicly or privately owned, that directly provides potable municipal water to more than 3,000 end users or that supplies more than 3,000 acre-feet of potable water annually at retail for municipal purposes.
(m)"Urban water use target" means the urban retail water supplier's targeted future daily per capita water use.
(n)"Urban wholesale water supplier," means a water supplier, either publicly or privately owned, that provides more than 3,000 acre-feet of water annually at wholesale for potable municipal purposes.

Chapter 3 Urban Retail Water Suppliers
SECTION 10608.16-10608.44
10608.16.(a) The state shall achieve a 20-percent reduction in urban per capita water use in California on or before December 31, 2020.
(b) The state shall make incremental progress towards the state target specified in subdivision (a) by reducing urban per capita water use by at least 10 percent on or before December 31, 2015.

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10608.20.(a) (1) Each urban retail water supplier shall develop urban water use targets and an interim urban water use target by July 1, 2011. Urban retail water suppliers may elect to determine and report progress toward achieving these targets on an individual or regional basis, as provided in subdivision (a) of Section 10608.28, and may determine the targets on a fiscal year or calendar year basis.
(2) It is the intent of the Legislature that the urban water use targets described in paragraph (1) cumulatively result in a 20-percent reduction from the baseline daily per capita water use by December 31, 2020. (b) An urban retail water supplier shall adopt one of the following methods for determining its urban water use target pursuant to subdivision (a):
(1) Eighty percent of the urban retail water supplier's baseline per capita daily water use.
(2) The per capita daily water use that is estimated using the sum of the following performance standards:
(A) For indoor residential water use, 55 gallons per capita daily water use as a provisional standard. Upon completion of the department's 2016 report to the Legislature pursuant to Section 10608.42, this standard may be adjusted by the Legislature by statute.
(B) For landscape irrigated through dedicated or residential meters or connections, water efficiency equivalent to the standards of the Model Water Efficient Landscape Ordinance set forth in Chapter 2.7 (commencing with Section 490) of Division 2 of Title 23 of the California Code of Regulations, as in effect the later of the year of the landscape's installation or 1992. An urban retail water supplier using the approach specified in this subparagraph shall use satellite imagery, site visits, or other best available technology to develop an accurate estimate of landscaped areas.
(C) For commercial, industrial, and institutional uses, a 10-percent reduction in water use from the baseline commercial, industrial, and institutional water use by 2020.
(3) Ninety-five percent of the applicable state hydrologic region target, as set forth in the state's draft 20x2020 Water Conservation Plan (dated April 30, 2009). If the service area of an urban water supplier includes more than one hydrologic region, the supplier shall apportion its service area to each region based on population or area.
(4) A method that shall be identified and developed by the department, through a public process, and reported to the Legislature no later than December 31, 2010. The method developed by the department shall identify per capita targets that cumulatively result in a statewide 20- percent reduction in urban daily per capita water use by December 31,

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2020. In developing urban daily per capita water use targets, the department shall do all of the following:
(A) Consider climatic differences within the state.
(B) Consider population density differences within the state. (C) Provide flexibility to communities and regions in meeting the targets. (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

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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 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 Web site, 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. (i) (1) The department shall adopt regulations for implementation of the provisions relating to process water in accordance with subdivision (l) of 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.
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

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defined in paragraph(3) of subdivision (b) 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.
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 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

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10608.48), if the agricultural water use is incorporated into its urban water use target pursuant to paragraph (1).
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 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.
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

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(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.
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.
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. 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. 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.
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

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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.
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 4 Agricultural Water Suppliers
SECTION 10608.48
10608.48.(a) On or before July 31, 2012, an agricultural water supplier shall implement efficient water management practices pursuant to subdivisions (b) and (c). (b) Agricultural water suppliers shall implement all of the following critical efficient management practices:
(1) Measure the volume of water delivered to customers with sufficient accuracy to comply with subdivision (a) of Section 531.10 and to implement paragraph (2).
(2) Adopt a pricing structure for water customers based at least in part on quantity delivered.
(c) Agricultural water suppliers shall implement additional efficient management

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practices, including, but not limited to, practices to accomplish all of the following, if the measures are locally cost effective and technically feasible:
(1) Facilitate alternative land use for lands with exceptionally high water duties or whose irrigation contributes to significant problems, including drainage. (2) Facilitate use of available recycled water that otherwise would not be used beneficially, meets all health and safety criteria, and does not harm crops or soils.
(3) Facilitate the financing of capital improvements for on-farm irrigation systems.
(4) Implement an incentive pricing structure that promotes one or more of the following goals:
(A) More efficient water use at the farm level.
(B) Conjunctive use of groundwater.
(C) Appropriate increase of groundwater recharge.
(D) Reduction in problem drainage.
(E) Improved management of environmental resources.
(F) Effective management of all water sources throughout the year by adjusting seasonal pricing structures based on current conditions.
(5) Expand line or pipe distribution systems, and construct regulatory reservoirs to increase distribution system flexibility and capacity, decrease maintenance, and reduce seepage.
(6) Increase flexibility in water ordering by, and delivery to, water customers within operational limits.
(7) Construct and operate supplier spill and tailwater recovery systems. (8) Increase planned conjunctive use of surface water and groundwater within the supplier service area.
(9) Automate canal control structures.
(10) Facilitate or promote customer pump testing and evaluation. (11) Designate a water conservation coordinator who will develop and implement the water management plan and prepare progress reports. (12) Provide for the availability of water management services to water users.

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These services may include, but are not limited to, all of the following:
(A) On-farm irrigation and drainage system evaluations. (B) Normal year and real-time irrigation scheduling and crop evapotranspiration information.
(C) Surface water, groundwater, and drainage water quantity and quality data.
(D) Agricultural water management educational programs and materials for farmers, staff, and the public.
(13) Evaluate the policies of agencies that provide the supplier with water to identify the potential for institutional changes to allow more flexible water deliveries and storage.
(14) Evaluate and improve the efficiencies of the supplier's pumps. (d) Agricultural water suppliers shall include in the agricultural water management plans required pursuant to Part 2.8 (commencing with Section 10800) a report on which efficient water management practices have been implemented and are planned to be implemented, an estimate of the water use efficiency improvements that have occurred since the last report, and an estimate of the water use efficiency improvements estimated to occur five and 10 years in the future. If an agricultural water supplier determines that an efficient water management practice is not locally cost effective or technically feasible, the supplier shall submit information documenting that determination. (e) The data shall be reported using a standardized form developed pursuant to Section 10608.52.
(f) An agricultural water supplier may meet the requirements of subdivisions (d) and (e) by submitting to the department a water conservation plan submitted to the United States Bureau of Reclamation that meets the requirements described in Section 10828.
(g) On or before December 31, 2013, December 31, 2016, and December 31, 2021, the department, in consultation with the board, shall submit to the Legislature a report on the agricultural efficient water management practices that have been implemented and are planned to be implemented and an assessment of the manner in which the implementation of those efficient water management practices has affected and will affect agricultural operations, including estimated water use efficiency improvements, if any. (h) The department may update the efficient water management practices required pursuant to subdivision (c), in consultation with the Agricultural Water Management Council, the United States Bureau of Reclamation, and the board.

All efficient water management practices for agricultural water use pursuant to this chapter shall be adopted or revised by the department only after the

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department conducts public hearings to allow participation of the diverse geographical areas and interests of the state.
(i) (1) The department shall adopt regulations that provide for a range of options that agricultural water suppliers may use or implement to comply with the measurement requirement in paragraph (1) of subdivision (b). (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.

Chapter 5 Sustainable Water Management
Section 10608.50
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:
(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.

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Chapter 6 Standardized Data Collection
SECTION 10608.52
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.

Chapter 7 Funding Provisions
Section 10608.56-10608.60
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

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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 is not implementing all of the requirements of this part or Part 2.8 (commencing with Section 10800).
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 8 Quantifying Agricultural Water Use Efficiency SECTION 10608.64
The department, in consultation with the Agricultural Water Management Council, academic experts, and other stakeholders, shall develop a methodology for quantifying the efficiency of agricultural water use. Alternatives to be assessed shall include, but not be limited to, determination of efficiency levels based on crop type or irrigation system distribution uniformity.

On or before December 31, 2011, the department shall report to the Legislature on a proposed methodology and a plan for implementation. The plan shall include the estimated implementation costs and the types of data needed to support the methodology. Nothing in this section authorizes the department to implement a methodology established pursuant to this section.

Appendices
City of Corona
2025 Urban Water Management Plan
Appendix C – 2025 Checklist Corona

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

Plan preparation n/a Executive Summary, CH 1 and Ch 2
x x 2.1 Section 2.1 10620(b) Every person that becomes a Supplier shall adopt UWMP within one year after it has become a  Supplier. Plan preparation n/a Chapter 2; Section 2.1 Basis for  Preparation Plan x n/a 2.5 Section 2.5 10644 Supplier shall report the Public Water Systems number, volume of delivered water, and number of  connections that are included in this UWMP. Plan preparation 2-1 Chapter 2; Section 2.1 Basis for  Preparation Plan, Section 2.1.1  Public Water Systemsx x 2.5 Section 2.5 10644 Supplier shall report if this UWMP is an individual UWMP and whether the Supplier belongs to a regional  UWMP or regional alliance. Plan preparation 2-2 Chapter 2; Section 2.2 Individual or  Regional Plans.x x 2.5 Section 2.5 10644 Supplier shall report whether the data is in fiscal or calendar years and the units of measure used for  reporting water volumes. Plan preparation 2-3 Chapter 2; Section 2.3 Fiscal or  Calendar Year and Units of Measure x x 2.4 Section 2.4 10642
Provide supporting documentation that the Supplier has encouraged active involvement of diverse social, cultural, and economic elements of the population within the service area prior to and during the preparation of the plan and contingency plan.

Plan preparation n/a Chapter 2; Section 2.4 Coordination  and outreach x x 2.4 Section 2.4.2 10620(d)(3)
Coordinate the preparation of its plan with other appropriate agencies in the area, including other Suppliers that share a common source, water management agencies, and relevant public agencies, to the extent practicable.

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

Plan preparation 2-4 W N/A
x x 3 Chapter 3.0 10631(a) Describe the Supplier service area. System description n/a Chapter 3; Section 3.1 General  Description x x 3.3 Section 3.3 10631(a) Describe the climate of the Supplier’s service area. System description n/a Chapter 3; Section 3.3 Service Area  Climatex x 3.4 Section 3.4.1 10631(a) Provide the current and projected service area populations for 2030, 2035, 2040, 2045 and optionally  2050. System description 3-1 Chapter 3; Section 3.4 Service Area Population and Demographics, Section 3.4.1 Service Area population x x 3.4 Section 3.4.2 10631(a) Describe other social, economic, and demographic factors affecting the Supplier’s water management  planning. System description n/a Chapter 3; Section 3.4 Service Area Population and Demographics, Section 3.4.2 Other Social, Economic, and Demographic Factors. x x 3.5 Section 3.5 10631(a)
Describe the land uses within the service area… include the current and projected land uses within theexisting or anticipated service area affecting the Supplier’s water management planning. Describe the land uses within the service area.

System description and baselines n/a Chapter 3; Section 3.6 Land Uses  within the Service x Optional 4.2 Sections 4.2.3 and 4.2.4 10631(d)(1) Quantify past, current, and projected water use, identifying the uses among water use sectors. System water use 4-1 and 4-2 Chapter 4; Section 4.2.3 Past Water Use & Section 4.2.5 Projected Water Use x Optional 4.3 Section 4.3.1 10631(d)(3)(A) Report the distribution system water loss for each of the five years preceding the plan update. System water use 4-5 Chapter 4; Section 4.3 Distribution System Water Loss, Section 4.3.1 Previous Five Years Distribution System Losses x n/a 4.3 Section 4.3.2 10631(d)(3)(C) Retail Suppliers shall provide data to show the distribution loss standards were met. System water use 4-6 Chapter 4; Section 4.3 Distribution System Water Loss, Section 4.3.2 Progress Towards Meeting the Water Loss Performance Standard x n/a 4.2 Section 4.2.5.4 10631.1(a) Include projected water use needed for lower income housing projected in the service area of the  Supplier. System water use 4-3 Chapter 4; Section 4.2.5 Projected  Water Use, Section Lower Income  Households x n/a 4.2 Section 4.2.5.3 10631(d)(4)(A) In projected water use, include estimates of water savings from adopted codes, plans, and other  policies or laws. System water use 4-3 N/A x n/a 4.2 Section 4.2.5.3 10631(d)(4)(B) Provide citations of codes, standards, ordinances, or plans used to make water use projections. System water use 4-3 Chapter 4; Section 4.2.5 Projected  Water Use x n/a 4.2 Section 4.2.5.3 10631(d)(4)(B)(ii)
To the extent that a Supplier reports the information described in subparagraph (A), an urban water Supplier shall… Indicate the extent that the water use projections consider savings from codes, standards, ordinances, or transportation and land use plans. Water use projections that do not accountfor these water savings shall be noted of that fact.

System water use 4-3 Chapter 4; Section 4.2.5 Projected  Water Use x x 4.2 Section 4.2.5.6 10635(b) Demands under climate change considerations must be included as part of the drought risk  assessment. System water use n/a Chapter 4; Section 4.2.5 Projected  Water Use, Section Climate Change  and Local Considerations n/a x 5.1 Section 5.1 10608.36 Wholesale Suppliers shall include an assessment of present and proposed future measures, programs,  and policies to help their Retail Suppliers achieve targeted water use reductions. Baselines and targets n/a N/A x n/a 5.2 Section 5.2 10608.4
Retail Suppliers shall report on their compliance in meeting their water use targets. Reporting requirements will vary depending on whether the Supplier:- Was considered an urban retail water supplier in 2020,- Met its 2020 target in 2020, or- Was part of a merger or consolidation since 2020.Chapter 5 Subsections 5.2.1, 5.2.2, and 5.2.3 address each of these situations.

Baselines and targets 5-1 Chapter 5; SB X7-7 Baselines,  Targets, and 2025 Reporting. x x 6.1 Section 6.1 10631(b)(2) When multiple sources of water supply are identified, describe the management of each supply in  relationship to other identified supplies. System supplies n/a Chapter 6, Section 6.2 Water Supply Analysis Overview, Section 6.3 Purchased or Imported Water and Section 6.4 Grounwater x x 6.1 Sections 6.1 and 6.2 10631(b)(1)
Provide a discussion of anticipated supply availability under a normal, single dry year, and a drought lasting five years, as well as more frequent and severe periods of drought, including changes in supply due to climate change.

System supplies n/a
Chapter 6, Section 6.2 Water Supply Analysis Overview, Section 6.3 Purchased or Imported Water and Section 6.4 Grounwater x x 6.2 Section 6.2.2 10631(b)(4)(C)
Indicate whether groundwater is an existing or planned source of water available to the Supplier. If groundwater is identified as an existing or planned source of water… (include) a detailed description and analysis of the location, amount and sufficiency of groundwater pumped by the Supplier for the past five years.

Water supplies and recycled water 6-1 Chapter 6; Section 6.4 Groundwater x x 6.2 Section 6.2.2 10631(b)(4)(A)
Indicate whether a groundwater sustainability plan or groundwater management plan has been adopted by the Supplier or if there is any other specific authorization for groundwater management. Include a copy of the plan or authorization.

System supplies n/a Chapter 6; Section 6.4 Groundwater
x x 6.2 Section 6.2.2 10631(b)(4)(B) Describe the groundwater basin. System supplies n/a Chapter 6; Section 6.4 Groundwater x x 6.2 Section 6.2.2 10631(b)(4)(B) Indicate if the basin has been adjudicated and include a copy of the court order or decree and a  description of the amount of water the Supplier has the legal right to pump. System supplies n/a Chapter 6; Section 6.4 Groundwater x x 6.2 Section 6.2.2 10631(b)(4)(B) For unadjudicated basins… (include) information as to whether DWR has identified the basin as a high-  or medium-priority basin in the most current official departmental bulletin… Water supplies and recycled  water n/a Chapter 6; Section 6.4 Groundwater x x 6.2 Section 6.2.2 10631(b)(4)(B) For unadjudicated basins… describe efforts by the Supplier to coordinate with sustainability or  groundwater agencies to achieve sustainable groundwater conditions. Water supplies and recycled  water n/a Chapter 6; Section 6.4 Groundwater

Retail
(x = required)
Wholesale
(x = required) Order 2025 Guidebook Location Water Code Section Summary as Applies to UWMP Subject Relevant Submittal Table 2025 UWMP Location x x 6.2 Section 6.2.2. 10631(b)(4)(C)
If groundwater is identified as an existing or planned source of water… (include) a detailed description and analysis of the location, amount and sufficiency of groundwater pumped by the Supplier for the past five years.

System supplies n/a Chapter 6; Section 6.4 Groundwater
x x 6.2 Section 6.2.2 10631(b)(4)(D) Provide a detailed description and analysis of the amount and location of groundwater that is projected  to be pumped. System supplies 6-9 Chapter 6; Section 6.4 Groundwaterx x 6.1 Section 6.1 10631(b) Identify and quantify the existing and planned sources of water available for 2025, 2030, 2035, 2040,  2045 and optionally 2050. System supplies 6-8 and 6-9 Chapter 6; Section 6.10 Summary  of Existing and Planned Sources of  Water x x 6.2 Section 6.2.7 10631(c) Describe the opportunities for exchanges or transfers of water on a short-term or long-term basis. System supplies n/a Chapter 6; Section 6.9 Water  Exchanges and Water Transfersx n/a 6.2 Section 6.2.5 10633(a) Describe the wastewater collection and treatment systems in the Supplier’s service area with quantified  amount of collection and treatment and the disposal methods. System supplies (recycled water) 6-2 Chapter 6; Section 6.7 Wastewater  and Recycled Waterx x 6.2 Section 6.2.5 10633(b) Describe the quantity of treated wastewater that meets recycled water standards, is being discharged,  and is otherwise available for use in a recycled water project. System supplies (recycled water) 6-3 Chapter 6; Section 6.7 Wastewater  and Recycled Waterx x 6.2 Section 6.2.5 10633(c) Describe the recycled water currently being used in the Supplier's service area. System supplies (recycled water) 6-4 Chapter 6; Section 6.7 Wastewater  and Recycled Waterx x 6.2 Section 6.2.5 10633(d) Describe and quantify the potential uses of recycled water and provide a determination of the technical  and economic feasibility of those uses. System supplies (recycled water) 6-4 Chapter 6; Section 6.7 Wastewater  and Recycled Waterx x 6.2 Section 6.2.5 10633(e) Describe the projected use of recycled water within the Supplier's service area at the end of 5, 10, 15,  and 20 years, and describe the actual use of recycled water in comparison to uses previously projected. System supplies (recycled water) 6-4 and 6-5 Chapter 6; Section 6.7 Wastewater  and Recycled Water x x 6.2 Section 6.2.5 10633(f) Describe the actions that may be taken to encourage the use of recycled water and the projected  results of these actions in terms of acre-feet of recycled water used per year. System supplies (recycled water) 6-6 Chapter 6; Section 6.7 Wastewater  and Recycled Water x x 6.2 Section 6.2.5 10633(g) Provide a plan for optimizing the use of recycled water in the Supplier's service area. System supplies (recycled water) n/a Chapter 6; Section 6.7 Wastewater  and Recycled Waterx x 6.2 Section 6.2.6 10631(g) Describe desalinated water project opportunities for long-term supply. System supplies 6-7 Chapter 6; Section 6.8 Dsesalinated  Water Opportunitiesx x 6.2 Section 6.2.10 10631(f) Describe the expected future water supply projects and programs that may be undertaken by the water Supplier to address water supply reliability in average, single-dry, and for a period of drought lasting five consecutive water years.

System supplies 6-7 Chapter 6; Section 6.10 Future  Water Projects x x 6.3 Section 6.3 and Appendix O 10631.2(a) The UWMP must include energy information, as stated in the code, that a Supplier can readily obtain. System suppliers, energy  intensity O-1A, O-1B, O-1C, and O-2 Chapter 6; Section 6.12 Energy  Intensity x 7.1 Section 7.1 10634 Provide information on the quality of existing sources of water available to the Supplier and the manner  in which water quality affects water management strategies and supply reliability. Water supply reliability  assessment n/a Chapter 7; Section 7.2 Water  Service Reliability Assessmentx x 7.2 Section 7.2 10635(a) Service Reliability Assessment: Assess the water supply reliability during normal, dry, and a drought lasting five consecutive water years by comparing the total water supply sources available to the Supplier with the total projected water use over the next 20 years.

Water supply reliability assessment 7-2, 7-3, and 7-4
Chapter 7; Section 7.2.2 7.2.2WSRA Description of Management Tools and Options x x 7.2 Section 7.2.3 10620(f) Describe water management tools and options to maximize resources and minimize the need to import  water from other regions. Water supply reliability  assessment n/a Chapter 7; Section 7.2.3 WRSA  Description of Management Tools  and Optionsx x 7.3 Section 7.3 10635(b) Provide a drought risk assessment as part of information considered in developing the demand  management measures and water supply projects. Water supply reliability  assessment n/a Chapter 7; Section 7.2 Drought Risk  Assessmentx x 7.3 Section 7.3 10635(b)(1) Include a description of the data, methodology, and basis for one or more supply shortage conditions that are necessary to conduct a drought risk assessment for a drought period that lasts five consecutive years.

Water supply reliability assessment n/a
Chapter 7; Section 7.3.1 7.3.1 Data, Methods, and Basis for Water Shortage Condition x x 7.3 Section 7.3 10635(b)(2) Include a determination of the reliability of each source of supply under a variety of water shortage  conditions. Water supply reliability  assessment n/a Chapter 7, Section 7.3.2 7.3.2 DRA  Water Source Reliabilityx x 7.3 Section 7.3 10635(b)(3) Include a comparison of the total water supply sources available to the Supplier with the total projected  water use for the drought period. Water supply reliability  assessment 7-5 Chapter 7; Section 7.3.3 DRA Water  Supply and Use Comparisonx x 7.3 Section 7.3 10635(b)(4) Include considerations of the historical drought hydrology, plausible changes on projected supplies and demands under climate change conditions, anticipated regulatory changes, and other locally applicable criteria.

Water supply reliability assessment n/a Chapter 7; Section 7.3.3 DRA Water  Supply and Use Comparison x x 8 Chapter 8 10632(a) Provide a water shortage contingency plan (WSCP) with specified elements below. Water shortage contingency  planning n/a Chapter 8; WSCP x x 8 Chapter 8 10632(a)(1) Provide an analysis of water supply reliability (from Guidebook Chapter 7) in the WSCP. Water shortage contingency  planning n/a Chapter 8; Section 8.5 Shortage  Response Actions x x 8.2 Section 8.2 10632(a)(2)(A) Provide the written decision-making process and other methods that the Supplier will use each year to  determine its water reliability. Water shortage contingency  planning n/a Chapter 8; WSCP, Section 8.2 Annual Water Supply and Demand Assessment Procedures, Section 8.2.1 Decision-Making Process x x 8.2 Section 8.2 10632(a)(2)(B) Provide data and methodology to evaluate the Supplier’s water reliability for the current year and one dry year pursuant to factors in the code. Water shortage contingency  planning n/a Chapter 8; WSCP, Section 8.2 Annual Water Supply and Demand Assessment Procedures, 8.2.2 Data and Methodologies x x 8.3 Section 8.3 10632(a)(3)(A)
Define six standard water shortage levels of 10%, 20%, 30%, 40%, 50% shortage, and greater than 50% shortage. These levels shall be based on supply conditions, including percent reductions in supply, changes in groundwater levels, changes in surface elevation, or other conditions. The shortage levels shall also apply to a catastrophic interruption of supply.

Water shortage contingency planning n/a Chapter 8; WSCP, Section 8.3 Six  Standard Water Shortages Stages x x 8.3 Section 8.3 10632(a)(3)(B) Suppliers with an existing WSCP that uses different water shortage levels must cross reference their  categories with the six standard categories. Water shortage contingency  planning 8-1 Chapter 8; WSCP, Section 8.3 Six  Standard Water Shortages Stages x x 8.4 Section 8.4 10632(a)(4)(A) Suppliers with WSCPs that align with the defined shortage levels must specify locally appropriate supply  augmentation actions. Water shortage contingency  planning 8-2 Chapter 8: WSCP, Section 8.4  Shortage Response Actions, 8.4.1  Supply Augmentationx x 8.4 Section 8.4 10632(a)(4)(B) Specify locally appropriate demand reduction actions to adequately respond to shortages. Water shortage contingency  planning 8-3 Chapter 8: WSCP, Section 8.4  Shortage Response Actions, 8.4.2  Demand Reductionsx x 8.4 Section 8.4 10632(a)(4)(C) Specify locally appropriate operational changes. Water shortage contingency  planning 8-2 Chapter 8: WSCP, Section 8.4  Shortage Response Actions, 8.4.3  Operational Changesx x 8.4 Section 8.4 10632(a)(4)(D) Specify additional mandatory prohibitions against specific water use practices that are in addition to State-mandated prohibitions are appropriate to local conditions. Water shortage contingency  planning Table 8-3 Chapter 8: WSCP, Section 8.4  Shortage Response Actions, 8.4.4  Additional Mandatory Restrictionsx x 8.4 Section 8.4 10632(a)(4)(E) Estimate the extent to which the gap between supplies and demand will be reduced by implementation  of the action. Water shortage contingency  planning 8-2 and 8-3 Chapter 8: WSCP, Section 8.4 Shortage Response Actions, 8.4.2 Demand Reduction & 8.4.3 Operational Changes x x 8.4 Section 8.4.6 10632.5 The UWMP shall include a seismic risk assessment and mitigation plan. Water shortage contingency plan n/a Chapter 8: WSCP, Section 8.4 Shortage Response Actions, 8.4.6 Seismic Risk Assessment and Mitigation Plan x x 8.5 Section 8.5 10632(a)(5)(A) Suppliers must describe that they will inform customers, the public and others regarding any current or  predicted water shortages. Water shortage contingency  planning n/a Chapter 8: WSCP, Section 8.5  Communication Protocolsx x 8.5 Section 8.5 10632(a)(5)(B),  10632(a)(5)(C) Suppliers must describe that they will inform customers, the public and others regarding any shortage  response actions triggered or anticipated to be triggered and other relevant communications. Water shortage contingency  planning n/a Chapter 8: WSCP, Section 8.5  Communication Protocols x n/a 8.6 Section 8.6 10632(a)(6) Retail Supplier must describe how it will ensure compliance with and enforce provisions of the WSCP. Water shortage contingency  planning n/a Chapter 8: WSCP, Section 8.6  Compliance and Enforcement x x 8.7 Section 8.7 10632(a)(7)(A) Describe the legal authority that empowers the Supplier to enforce shortage response actions. Water shortage contingency  planning n/a Chapter 8: WSCP, Section 8.6  Compliance and Enforcementx x 8.7 Section 8.7 10632(a)(7)(B) Provide a statement that the Supplier will declare a water shortage emergency per Water Code  Chapter 3. Water Shortage Emergencies . Water shortage contingency  planning n/a Chapter 8: WSCP, Section 8.7 Legal  Authorities

Retail
(x = required)
Wholesale
(x = required) Order 2025 Guidebook Location Water Code Section Summary as Applies to UWMP Subject Relevant Submittal Table 2025 UWMP Location x x 8.7 Section 8.7 10632(a)(7)(C) Provide a statement that the Supplier will coordinate with any city or county within which it provides water for the possible proclamation of a local emergency. Water shortage contingency  planning n/a Chapter 8: WSCP, Section 8.7 Legal  Authoritiesx x 8.8 Section 8.8 10632(a)(8)(A) Describe the potential revenue reductions and expense increases associated with activated shortage  response actions. Water shortage contingency  planning n/a Chapter 8: WSCP, Section 8.8  Financial Consequences of WSCPx x 8.8 Section 8.8 10632(a)(8)(B) Provide a description of mitigation actions needed to address revenue reductions and expense increases associated with activated shortage response actions. Water shortage contingency  planning n/a Chapter 8: WSCP, Section 8.8  Financial Consequences of WSCPx n/a 8.8 Section 8.8 10632(a)(8)(C) Retail Suppliers must describe the cost of compliance with Water Code Chapter 3.3, Excessive Residential Water Use During Drought . Water shortage contingency  planning n/a N/A x n/a 8.9 Section 8.9 10632(a)(9) Retail Suppliers must describe the monitoring and reporting requirements and procedures that ensure  appropriate data are collected, tracked, and analyzed for purposes of monitoring customer compliance. Water shortage contingency  planning n/a Chapter 8: WSCP, Section 8.9  Monitoring and Reporting x x 8.10 Section 8.10 10632(a)(10) Describe reevaluation and improvement procedures for monitoring and evaluation the WSCP to ensure  risk tolerance is adequate and appropriate water shortage mitigation strategies are implemented. Water shortage contingency  planning n/a Chapter 8: WSCP, Section 8.10  WSCP Refinement Procedures x n/a 8.11 Section 8.11 10632(b) Analyze and define water features that are artificially supplied with water, including ponds, lakes,  waterfalls, and fountains, separately from swimming pools and spas. Water shortage contingency  planning n/a Chapter 8: WSCP, Section 8.10  WSCP Refinement Procedures x x 8.12 Section 8.12 10632(c) Make available the WSCP to customers and any city or county where it provides water within 30 days  after adoption of the plan. Water shortage contingency  planning n/a Chapter 8: WSCP, Section 8.11  Special Water Feature Distinctionx n/a 9.1 Sections 9.1 10631(e)(1) Retail Suppliers shall provide a description of the nature and extent of each demand management measure implemented over the past five years. The description will address specific measures listed incode.

Demand management measures n/a
Chapter 9: Demand Management Measures, Section 9.1 DMM for Retail Suppliers n/a x 9.2 Sections 9.2 10631(e)(2) Wholesale Suppliers shall describe specific demand management measures listed in code, their  distribution system asset management program, and Supplier assistance program. Demand management measures n/a N/A x n/a 10 Chapter 10 10608.26(a) Retail Suppliers shall conduct a public hearing to discuss adoption, implementation, and economic  impact of water use targets (recommended to discuss compliance). Plan adoption, submittal, and  implementation n/a Chapter 10: P,A,S, and I x x 10.2 Section 10.2.1 10621(b)
Notify, at least 60 days prior to the public hearing, any city or county within which the Supplier provides water that the Supplier will be reviewing the UWMP and considering amendments or changes to the plan.

Plan adoption, submittal, and implementation 10-1
Chapter 10: P, A, S, and I, 10.3 Notice of Public Hearing, 10.3.2 60 Day Notification x x 10.4 Section 10.4 10621(f) Each urban water Supplier shall update and submit its 2025 plan  to DWR by July 1, 202 6. Plan adoption, submittal, and  implementation n/a Chapter 10: P, A, S, and I, 10.5  Plan Submittalx x 10.2 Sections 10.2.2, 10.3, and 10.5 10642 Provide supporting documentation that the Supplier made the UWMP and WSCP available for public inspection, published notice of the public hearing, and held a public hearing about the UWMP and WSCP.

Plan adoption, submittal, and implementation n/a Chapter 10: P, A, S, and I, 10.4  Public Hearing and Adoption x x 10.2 Section 10.2.2 10642 The Supplier is to provide the time and place of the hearing to any city or county within which the  Supplier provides water. Plan adoption, submittal, and  implementation 10-1 Chapter 10: Section 10.3 Notice of  Public Hearing, Section 10.3.3  Notice of Public Hearing x x 10.3 Section 10.3.2 10642 Provide supporting documentation that the UWMP and WSCP has been adopted as prepared or  modified. Plan adoption, submittal, and  implementation n/a Chapter 10: P, A, S, and I, 10.4  Public Hearing and Adoptionx x 10.4 Section 10.4 10644(a) Provide supporting documentation that the Supplier has submitted their UWMP to the California State  Library. Plan adoption, submittal, and  implementation n/a Chapter 10: P, A, S, and I, 10.5 Plan Submittal, Section 10.5.3 Submitting a UWMP, Including WSCP, to the California State Library x x 10.4 Section 10.4 10644(a)(1) Provide supporting documentation that the Supplier has submitted their UWMP to any city or county  within which the Supplier provides water no later than 30 days after adoption. Plan adoption, submittal, and  implementation n/a Chapter 10: P, A, S, and I, 10.5  Plan Submittal, Section 10.5.4  Submittal to Cities and Countiesx x 10.4 Sections 10.4.1 and 10.4.2 10644(a)(2) The UWMP, or amendments to the UWMP, submitted to DWR shall be submitted electronically. Plan adoption, submittal, and  implementation n/a Chapter 10: P, A, S, and I, 10.5 Plan Submittal, Section 10.5.2 Electronic Submittal to California DWR x x 10.7 Section 10.7.2 10644(b) If revised, submit a copy of the WSCP to DWR within 30 days of adoption. Plan adoption, submittal, and  implementation n/a Chapter 10: P, A, S, and I, 10.9 Amending an Adopted Urban Water Management Plan or Water Shortage Contingency Plan, Section 10.9.2 Submitting Revised Water Shortage Contingency Plan x x 10.5 Section 10.5 10645(a) Provide supporting documentation that, not later than 30 days after filing a copy of its UWMP with  DWR, the Supplier has or will make the plan available for public review during normal business hours. Plan adoption, submittal, and  implementation n/a Chapter 10: P, A, S, and I, 10.6  Public Availability x x 10.5 Section 10.5 10645(b) Provide supporting documentation that, not later than 30 days after filing a copy of its WSCP with DWR,  the Supplier has or will make the plan available for public review during normal business hours. Plan adoption, submittal, and  implementation n/a Chapter 10: P, A, S, and I, 10.6  Public Availability x x 10.6 Section 10.6 10621(c) If Supplier is regulated by the Public Utilities Commission, include its plan and contingency plan as part  of its general rate case filings. Plan adoption, submittal, and  implementation n/a Chapter 10: P, A, S, and I, 10.7  Notification to Public Utilities  Commision

Appendices
City of Corona
2025 Urban Water Management Plan
Appendix D – Corona 2025 Submittal Tables

CA3310037 Corona, City of 46,569 30,379
46,569 30,379
Submittal Table 2-1 Retail: Public Water Systems
Add additional rows as needed
NOTES:

Volume of Water
Supplied 2025 (AF)
DWR NOTES:

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

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

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

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

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

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

DWR NOTES:

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

NOTES:

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

Wholesale Water Supplier Name
Add additional rows as needed
Western Municipal Water District Of Riverside
NOTES:
10631(h) An urban water supplier that relies upon a wholesale agency for a source of water shall provide the wholesale agency with water use projections from that agency for that source of water in five-year increments to 20 years or as far as data is available.

2025 2030 2035 2040 2045 2050(opt)
169,380 168,892 168,404 167,916 167,428 166,940
Submittal Table 3-1 Retail: Population - Current and Projected Water Code Section 10631(a)
Population
Served
NOTES:

CWC 10631(a) describe the current and projected population of the service area including current and projected population…

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 17,934
Multi-Family Potable 2,666
Other (optional) Commercial/Institutional Potable 3,006 Industrial Potable 902
Landscape Potable 2,934
Landscape Reclaimed Water Use Non-Potable 3,854
Other (optional) Temp Construction/Hydrants Potable 76
Other (optional) Temp Construction/Hydrants Non-Potable 74 Other (optional) Brine Discharge Non-Potable 626
Distribution System Water Loss Real and Apparent Losses Potable 2,521 Sales/Transfers/Exchanges to other Suppliers Norco and Home Gardens Potable 355
30,394
4,555
Total 34,949
Submittal Table 4-1 Retail: Total Uses for Potable and Non-Potable Water — Actual Water Code Section 10631(d)(1)
NOTES:

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

3. This table identifies the unit of measure selected in Submittal Table 2-3. 2025 Actual Water Use
Add additional rows as needed
Subtotal Potable
Subtotal Non-Potable
Additional Description
(as needed)

Use Type
Drop down list
May select each use multiple times
These are the only Use Types that will be recognized
by the WUEdata online submittal tool
Potable or Non-Potable
(OPTIONAL)
Drop down list
2030 (AF) 2035 (AF) 2040 (AF) 2045 (AF) 2050 opt (AF)
Single Family Potable 21,743 21,745 21,815 21,750 21,753 Multi-Family Potable 3,237 3,238 3,248 3,238 3,239
Other (optional) Commercial/Institutional Potable 3,593 3,593 3,605 3,594 3,594 Industrial Potable 1,094 1,095 1,098 1,095 1,095
Landscape Potable 2,834 2,734 2,634 2,534 2,434
Landscape Reclaimed Water Use Non-Potable 3,830 3,930 4,030 4,130 4,230 Other (optional) Temp Construction/Hydrants Potable 366 366 366 366 366 Other (optional) Temp Construction/Hydrants Non-Potable 95 95 95 95 95 Other (optional) Brine Discharge Potable 618 618 618 618 618 Distribution System Water Loss Real and Apparent Losses Potable 2,612 2,604 2,604 2,589 2,582 Sales/Transfers/Exchanges to other Suppliers Norco and Home Gardens Potable 370 370 370 370 370 36,467 36,364 36,358 36,154 36,051
3,925 4,025 4,125 4,225 4,325
40,392 40,389 40,483 40,379 40,376
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)
CWC 10631(d)(1) For an urban retail water supplier, quantify, to the extent records are available... projected water use…identifying the uses among water use sectors… NOTES:

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

Subtotal Non-Potable
Subtotal Potable

Are Future Water Savings Included in Projections?
Drop down list (y/n) No
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.

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.

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
CWC 10631(d)(3) (A) The distribution system water loss shall be quantified for each of the five years preceding the plan update, in accordance with rules adopted pursuant to Section 10608.34.

Submittal Table 4-5 Retail: Water Loss Audit Reporting
Water Code Section 10631(d)(3)(A)
CA3310037
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

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)
CA3310037 Yes 13.9
Gallons per
Service
Connection per
Day (GPSCD)
46569 895 17.1 14.5
Gallons per
Service
Connection per
Day (GPSCD)
46569 728 14.0
CWC 10631(d)(3)(C) In the plan due July 1, 2021, and in each update thereafter, data shall be included to show whether the urban retail water supplier met the distribution loss standards enacted by the board pursuant to Section 10608.34.

Submittal Table 4-6 Retail: Progress Towards 2028 Water Loss Standard Water Code Section 10631(d)(3)(C)
NOTES:

Apparent Water Loss
Did the Water Board Calculate a
Water Loss Standard for this
Public Water System? (y/n)
If no, Supplier will not complete
this row.

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

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

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

Actual 2025 GPCD
(From SB X7-7
Compliance Form)
Did Supplier meet
the 2020 Target in
2025?
No Individual Target 213 177 Yes NA
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.

Submittal Table 5-1 Retail: SB X7-7 2020 Target Progress Water Code Section 10608.40
NOTES:

Did Supplier
Achieve Targeted
Reduction for
2020?
2020 Target Actual 2020 GPCD
Regional Alliance
Target or
Individual
Target?
Drop down list
DWR NOTES:

Suppliers calculating a 2025 GPCD will need to complete and submit SB X 7-7 Compliance Tables to verify the use of SB X7-7 Methodologies.

Suppliers that were part of a merger or consolidation since 2020 see Chapter 5 and Appendix P for guidance.

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

Proceed to the next table.

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

Was Supplier part of a
merger or
consolidation since
2020?

Groundwater Type
Drop Down List
May use each category
multiple times
Potable or
Non-Potable
(OPTIONAL)
Drop down list
Location or Basin Name 2021 (AF) 2022 (AF) 2023 (AF) 2024 (AF) 2025 (AF) Alluvial Basin Temescal Basin 16465 14482 14472 14227 15569 Alluvial Basin Bedford-Coldwater Basin 0 0 0 0 0
16,465 14,482 14,472 14,227 15,569
Add additional rows as needed
10631(4) If groundwater is identified as an existing or planned source of water available to the supplier, all of the following information:
(C) A detailed description and analysis of the location, amount, and sufficiency of groundwater pumped by the urban water supplier for the past five years. The description and analysis shall be based on information that is reasonably available, including, but not limited to, historic use records.

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)

Name of Wastewater
Collection Agency
Wastewater
Volume Metered
or Estimated?

OPTIONAL
Drop Down List
Volume of Wastewater
Collected from UWMP
Service Area 2025 (AF)
Name of Wastewater Treatment
Plant (WWTP) and Place ID
Number
Drop down list
Is WWTP Located
Within UWMP
Area?
Drop Down List
City of Corona Metered 9,157 Corona WWRF #1, Place ID
259171
No
City of Corona Metered 2,251 Corona WWRF #2, Place ID
259173
No
City of Corona Metered 763 Corona WWRF #3, Place ID
259174
No
12,171
Check the box if there is no wastewater collection system.

Proceed to the next table.

NOTES:

Submittal Table 6-2 Retail: Wastewater Collected Within Service 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) DWR NOTES: Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Submittal Table 2-3. This table identifies the unit of measure selected in Submittal Table 2-3.

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

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

Add additional rows as needed

Treatment Level
Drop down list
Volume
(AF)
Treatment Level
Drop down list
Volume
(AF)
Treatment Level
Drop down list
Volume
(AF)
Treatment Level
Drop down list
Volume
(AF)
Treatment Level
Drop down list
Volume
(AF)
Name of other
entity
Corona WWRF #1, Place
ID 259171 No 9,157 8,379 Tertiary 2,480 - Tertiary 5,899 0 0 Corona WWRF #2, Place
ID 259173 No 2,251 2,063 598 - 1,465 0 0
Corona WWRF #3, Place
ID 259174 No 763 831 831 - - 0 0
12,171 11,273 3,909 0 7,364 0 0
Submittal Table 6-3 Retail: Wastewater Treatment and Outcomes Within UWMP Service Area Water Code Section 10633(b)
DWR NOTES:

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

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

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

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

Proceed to the next table.

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

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

Volume Narrative page number
(OPTIONAL)
Other (Description Required) 4554 4443 4543 4643 4743 4843 0 0 0 0 0 0 0
0 0 0 0 0 0 0
Total 4554 4443 4543 4643 4743 4843 0 0
Use Type
Drop down list
Potable or Non-Potable
(after treatment if treated)
(OPTIONAL)
Drop down list
Additional Information
(as needed)
Add additional rows as 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: The City is anticipated 100 AFY every 5 years
2025 (AF) 2030 (AF) 2035 (AF) 2040 (AF) 2045 (AF) 2050 (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) : City of Corona Name of Supplier Operating the Recycled Water Distribution System (OPTIONAL) : City of Corona Volume of Supplemental Water Added in 2025 (OPTIONAL) :

Source of 2025 Supplemental Water (OPTIONAL) :

2020 Projection
for 2025 (AF)
2025 Actual
Use (AF)
4,795 4,554
4,795 4,554
Submittal Table 6-5 Retail: 2020 UWMP Recycled Water Use Projection Compared to 2025 Actual
Water Code Section 10633(e)
Check the box if recycled water was not used in 2025 nor previously projected for use in 2020.

Proceed to the next table.

Add additional rows as needed
Other (Description Required)
NOTES:

Total
DWR NOTES:

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

Use Type
Drop Down list

Name of Action Description Expected Increase in Recycled Water Use (AF)
Large Distribution Pipeline Projects Buena Vista Tenth Pipeline, Ontario Slipline, Sampson Pipeline, River Pipeline 842
Medium Distribution Pipeline Projects
Old Temescal Pipeline, Lincoln Foothill Pipeline,
Avenida Del Vista Pipeline, Border Pipeline,
Promenade Pipeline, Research Pipeline, Smith
Pipeline, Via Pacifica Pipeline, Tehachapi Pipeline
259
Small Distribution Pipeline Projects
Jenks Pipeline, Airport Circle Pipeline, Helicopter
Pipeline, Glider Pipeline, Citation Pipeline, Klug
Pipeline, Monica Pipeline, Chase Hudson Pipeline,
Cessna Pipeline,Main Citrus Pipeline
85 Conversion of Adjacent Demands Commercial, Industrial, Institutional, Multi-Family Residential, Single Family Residential 225
1,411
1,411
Total (AF)
DWR NOTES:

Units of measure (AF, CCF, MG) MUST remain consistent with units reported in Submittal Table 2-3. This table identifies the unit of measure selected in Submittal Table 2-

3. The unit conversion to Acre Feet addresses the Water Code's requirement that this value be provided in acre-feet.

NOTES:

Submittal Table 6-6 Retail: Methods to Encourage Future Recycled Water 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

Drop Down
List
(yes/no)
If Yes, Supplier Name
WRCRWA Treatment Yes WRCRWA

2.62 MGD (2,937 AFY) of
treated reclaimed water
delivered from WRCRWA
Wastewater Treatment
Plant
2,937
Bedford-Coldwater
Recharge Basin Yes
Coldwater Pit to be
converted to a recharge
basin, enhancing
groundwater storage
capacity in the basin
0 Well 7A/8A Treatment No City intends to do GAC
Treatment TBD
Glen Ivy Disinfection No Water Disinfection System
at Glen Ivy Site TBD
Planned for Use in
Year Type
Drop Down List
NOTES: Coldwater Recharge basin is intended to enhance groundwater storage capacity and will not increase normal supply; however, under single dry year and multiple dry year conditions, stored groundwater may be used to offset a drop in imported water supply availability. GAC Treatment at Well 7A/8A is intended, with no current planned date.

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)
Purchased or Imported Water WMWD - Mills WTP Potable 1,483 Purchased or Imported Water WMWD - Raw Water Non-Potable 14,899 Purchased or Imported Water WMWD Arlington Desalter Non-Potable 0 Groundwater (not desalinated) Temescal Basin Potable 15,569 Groundwater (not desalinated) Bedford-Coldwater Basin 0 Recycled Water Reclaimed Non-Potable 11,273
17,052 0
26,172 0
43,224 0
Submittal Table 6-8 Retail: Water Supplies — Actual
Water Code Section 10631(b)
2025
NOTES:

DWR NOTES:

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

Total Entitlement: e.g. Water Right, Groundwater Allocation, Contracted Amount.

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

2021 (AF) 2022 (AF) 2023 (AF) 2024 (AF) 2025 (AF)
Temescal Basin Desalter 10 MGD Groundwater Brine Line 11,380 11,383 11,055 10,157 10,779 City of Corona Total 11380 11383 11055 10157 10779
NOTES:

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

Volume of Water Desalinated
DWR NOTES:

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

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

Water Supply
Reasonably
Available
Volume (AF)
Total Entitlement
(OPTIONAL)
See 'DWR Notes'
below (AF)
Reasonably
Available
Volume (AF)
Total Entitlement
(OPTIONAL)
See 'DWR Notes'
below (AF)
Reasonably
Available
Volume (AF)
Total Entitlement
(OPTIONAL)
See 'DWR Notes'
below (AF)
Reasonably
Available
Volume (AF)
Total Entitlement
(OPTIONAL)
See 'DWR Notes'
below (AF)
Reasonably
Available
Volume (AF)
Total Entitlement
(OPTIONAL)
See 'DWR Notes'
below (AF)
Purchased or Imported Water WMWD (all
sources) 21,110 21,110 21,110 21,110 21,110
Desalinated Water -
Groundwater
Temescal
Basin 14,482 14,482 14,482 14,482 14,482
Groundwater (not Bedford- 2,112 2,112 2,112 2,112 2,112 Recycled Water Reclaimed 10,000 19,000 19,000 19,000 19,000 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0
47,704 0 56,704 0 56,704 0 56,704 0 56,704 0
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
10631. A plan shall be adopted in accordance with this chapter that shall do all of the following... (b) Identify and quantify, to the extent practicable, the existing and planned sources of water available to the supplier over the same five-year 2050 (opt)
Add additional rows as needed
Total
NOTES:
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.

2030 (AF) 2035 (AF) 2040 (AF) 2045 (AF) 2050 (AF)
Supply totals
(autofill from Submittal Table 6-
9 R)
47,704 56,704 56,704 56,704 56,704
Use totals
(autofill from Submittal Table 4-
2 R)
40,392 40,389 40,483 40,379 40,376
Surplus/(shortfall) 7,312 16,315 16,221 16,325 16,328
WSCP - supply augmentation
benefit
WSCP - use reduction savings
benefit
Revised Surplus/(shortfall)
OPTIONAL Planned WSCP Actions
Submittal Table 7-2 Retail: Normal Year Supply and Use Comparison Water Code Section 10635 (a)
NOTES:

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

Supply totals 47,704 56,704 56,704 56,704 56,704
Use totals 46,788 46,783 46,892 46,773 46,768
Surplus/(shortfall) 916 9,921 9,812 9,931 9,936
WSCP - supply
augmentation benefit
WSCP - use reduction
savings benefit
Revised Surplus/(shortfall)
2050 (AF)
DWR NOTES : Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Submittal Table 2-3.

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

2030 (AF) 2035 (AF) 2040 (AF) 2045 (AF) 2050 (AF)
Supply totals 47,704 56,704 56,704 56,704 56,704
Use totals 42,771 42,766 42,866 42,757 42,753
Surplus/(shortfall) 4,933 13,938 13,838 13,947 13,951
WSCP - supply augmentation benefit
WSCP - use reduction savings benefit
Revised Surplus/(shortfall)
Supply totals 47,704 56,704 56,704 56,704 56,704
Use totals 44,834 44,829 44,934 44,820 44,815
Surplus/(shortfall) 2,870 11,875 11,770 11,884 11,889
WSCP - supply augmentation benefit
WSCP - use reduction savings benefit
Revised Surplus/(shortfall)
Supply totals 47,704 56,704 56,704 56,704 56,704
Use totals 46,788 46,783 46,892 46,773 46,768
Surplus/(shortfall) 916 9,921 9,812 9,931 9,936
WSCP - supply augmentation benefit
WSCP - use reduction savings benefit
Revised Surplus/(shortfall)
Supply totals 47,704 56,704 56,704 56,704 56,704
Use totals 45,265 45,260 45,366 45,251 45,246
Surplus/(shortfall) 2,439 11,444 11,338 11,453 11,458
WSCP - supply augmentation benefit
WSCP - use reduction savings benefit
Revised Surplus/(shortfall)
Supply totals 47,704 56,704 56,704 56,704 56,704
Use totals 43,351 43,346 43,447 43,337 43,333
Surplus/(shortfall) 4,353 13,358 13,257 13,367 13,371
WSCP - supply augmentation benefit
WSCP - use reduction savings benefit
Revised Surplus/(shortfall)
Submittal Table 7-4 Retail: Multiple Dry Years Supply and Use Comparison Water Code Section 10635(a)
OPTIONAL Planned WSCP Actions
Third year
Fifth year
DWR NOTES: Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Submittal Table 2-3.

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

First year
Second year OPTIONAL WSCP Actions

2026 Total
Total Water Use (AF) 36,017
Total Supplies (AF) 39,417
Surplus/Shortfall w/o WSCP Action 3,400
WSCP - supply augmentation benefit (AF)
WSCP - use reduction savings benefit (AF)
Revised Surplus/(shortfall)
2027 Total
Total Water Use (AF) 37,086
Total Supplies (AF) 39,417
Surplus/Shortfall w/o WSCP Action 2,331
WSCP - supply augmentation benefit (AF)
WSCP - use reduction savings benefit (AF)
Revised Surplus/(shortfall)
2028 Total
Total Water Use (AF) 38,155
Total Supplies (AF) 39,417
Surplus/Shortfall w/o WSCP Action 1,262
WSCP - supply augmentation benefit (AF)
WSCP - use reduction savings benefit (AF)
Revised Surplus/(shortfall)
2029 Total
Total Water Use (AF) 39,224
Total Supplies (AF) 39,417
Surplus/Shortfall w/o WSCP Action 193
WSCP - supply augmentation benefit (AF)
WSCP - use reduction savings benefit (AF)
Revised Surplus/(shortfall)
2030 Total
Total Water Use (AF) 40,293
Total Supplies (AF) 47,704
Surplus/Shortfall w/o WSCP Action 7,411
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)

Submittal Table 7-5 Retail: Five-Year Drought Risk Assessment Water Code Section 10635(b)(3)
WSCP - supply augmentation benefit (AF)
WSCP - use reduction savings benefit (AF)
Revised Surplus/(shortfall)
NOTES: City is assuming projected supply for the next 5-years based on projections from its recent GSP and no constraints on its purchased water.

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 (use reduction and supply augmentation)

Standard
Shortage
Levels
Percent Shortage
Range
Suppliers
Shortage
Levels
Percent
Shortage Range
1 Up to 10% 1 0 to 9%
2 Up to 20% 2 10 to 15%
3 Up to 30% 3 16 to 20%
4 Up to 40% 4 21 to 40%
5 Up to 50% 5 >40%
6 >50% 5 >40%
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: City of Corona has 5 levels as shown in table above. City is always on Stage 1 which is considered normal water supply.

No
Volume or
Percentage
Drop down
Shortage Gap
Reduction Value
(May be a range) (AF)
(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.

Submittal Table 8-2 Retail: Supply Augmentation and Other Actions Water Code Section 10632(a)(4)(A),(C) and (E)
Add additional rows as needed
NOTES: The City does not use supply augmentation to meet its water shortage needs.

Is the Supplier completing this table using the standard six levels? (yes/no) 10632(a)(4) Shortage response actions that align with the defined shortage levels and include, at a minimum, all of the following:
(A) Locally appropriate supply augmentation actions.
(C) Locally appropriate operational changes.

How much is this going to reduce the
shortage gap?
DWR NOTES: Units of measure (AF, CCF, MG) must remain consistent throughout the UWMP as reported in Submittal Table 2-3.

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

No
Volume or Percentage
Drop down
Shortage Gap
Reduction Value
(May be a range) (AF)
1 Other Volume 0-9% Normal water conservation program
implemented No
2 Landscape - Restrict or prohibit runoff
from landscape
irrigation
Volume
10-15%
No
2 Other - Customers must repair leaks,
breaks, and
malfunctions in a timely manner
Volume
10-15%
No
2 Other - Prohibit use of potable water
for washing hard
surfaces
Volume
10-15%
No
2 Landscape - Other landscape restriction
or prohibition Volume
10-15% Prohibit the application of potable water to outdoor landscapes during and within 48 hours after rainfall
measuring one-half (1/2)
inch or more. No
2 Landscape - Limit landscape irrigation
to specific times Volume
10-15% Lawns and/or ground cover may be watered and
landscaping may be irrigated for private properties,
parks, and the public right-of-ways, only between the
hours of 8:00 p.m. and 10:00 a.m., if the watering and
irrigation is performed with potable water. This
restriction shall not apply to watering and irrigation
performed with reclaimed water
No
3 Other Volume 16-20%
Use of water from fire hydrants shall be limited to fire fighting, related activities, or other activities
necessary to maintain the health, safety, and welfare
of
the public. Yes
3 Other water feature or swimming pool
restriction Volume 16-20%
All swimming pools, spas, ponds, and fountains shall
be equipped with recirculating pumps Yes
3 Other - Require automatic shut of hoses Volume 16-20% Yes 3 Landscape - Other landscape restriction
or prohibition Volume 16-20%
The use of reclaimed water to water / irrigate is
permitted on any day
and at any time No
3 Landscape - Limit landscape irrigation
to specific days Volume 16-20%
A govermnent agency
may water / irrigate with potable water on three days
per week of the agency's choosing Yes
3 Landscape - Limit landscape irrigation
to specific days Volume 16-20%
Watering / irrigating is prohibited on Fridays and on
any day of the week outside of the designated
watering
windows Yes
3 Landscape - Limit landscape irrigation
to specific days Volume 16-20%
Even number street addresses, parks and the public
right-of-ways, allowed to water / irrigate with potable water only on Sundays,
Tuesdays and Thursdays Yes
3 Other Volume 16-20%
Except as otherwise provided, all water conservation
and drought response measures of Water
Conservation Stage 1 shall be in full force and effect
during Water
Conservation Stage 2. Yes
3 Landscape - Other landscape restriction
or prohibition Volume 16-20%
Watering / irrigating,
including construction meter irrigation, allowed for a
maximum of 20 minutes per day Yes
3 Landscape - Limit landscape irrigation
to specific days Volume 16-20%
Odd number street addresses, parks and the public
right-of-ways, allowed to water / irrigate with potable water only on Saturdays, Mondays and
Wednesdays
Yes
3 CII - Restaurants may only serve water
upon request
Volume 16-20% Yes
Is the Supplier completing this table using the standard six levels? (yes/no) Submittal Table 8-3 Retail: Demand Reduction Actions
Water Code Section 10632(a)(4)(B),(D), and (E)
Add additional rows as needed
How much is this going to reduce the shortage
gap?
Shortage
Level
Demand Reduction Actions
Drop down list
These are the only categories that will be
accepted by the WUEdata online submittal
tool. Select those that apply.

Additional Explanation or Reference
(OPTIONAL)
Penalty, Charge, or
Other
Enforcement?
For Retail Suppliers Only
Drop Down List

4 Other Volume 21-40%
Except as otherwise provided, all water conservation
and drought response measures of Water
Conservation Stages 1 and 2 shall be in full force and
effect during Water Conservation
Stage 3.

Yes
4 Landscape - Limit landscape irrigation
to specific times Volume 21-40%
Lawns and/or ground covers may be watered and
landscaping may be irrigated, including construction
meter irrigation, for a maximum number of
minutes per day.

Yes
4 Landscape - Limit landscape irrigation
to specific days Volume 21-40%
Lawns and/or ground cover may be watered and
landscaping may be irrigated for properties with odd
number street addresses, up to three days per week
and only on Saturdays, Mondays
and Wednesdays.

Yes
4 Landscape - Limit landscape irrigation
to specific days Volume 21-40%
Lawns and/or ground cover may be watered and
landscaping may be irrigated for properties with even
number street addresses, up to three days per week
and only on Sundays, Tuesdays and Thursdays.

Yes
4 Landscape - Limit landscape irrigation
to specific days Volume 21-40%
Watering lawns and/or ground cover and irrigating
landscaping is prohibited on Fridays and on any day
of the week outside of the designated water
windows.

Yes
4 Landscape - Limit landscape irrigation
to specific days Volume 21-40%
A govenunent agency may water lawns and/or
ground cover and irrigate landscaping on day(s) of the
agency's choosing, up to three days per
week.

Yes
4 Other water feature or swimming pool
restriction Volume 21-40% The overfilling ofswimming pools and spas is prohibited. Yes 4 Water Features - Restrict water use for
decorative water features, such as
fountains
Volume 21-40%
The filling or refilling of
ornamental ponds, streams, and artificial lakes is
prohibited. Yes
4 Water Features - Restrict water use for
decorative water features, such as
fountains
Volume 21-40%
The operation of any ornamental fountain or similar
structure is prohibited except for short periods of
time to prevent damage, unless the fountain
recirculates
water. Yes
4 Landscape - Prohibit certain types of
landscape irrigation Volume 21-40%
Construction projects shall only use reclaimed water
except as approved by the General Manager and shall
not use water unnecessarily for any purposes other
than those required by regulatory agencies.

Construction projects requiring water for new
landscapes shall adhere to the designated days and
watering windows. Further, construction projects
necessary to maintain the health, safety, and welfare
of the public, as determined by the city, are exempt
from these regulations.

Yes
5 Other Volume >40%
Except as otherwise provided, all water conservation
and drought response measures of Water
Conservation Stages 1, 2 and 3 shall be in full force
and effect during Water Conservation
Stage 4.

Yes
5 Landscape - Prohibit certain types of
landscape irrigation Volume >40%
Irrigation of landscaping
shall be limited to supporting minimal survival of
trees and shrubs. Yes
5 Landscape - Prohibit certain types of
landscape irrigation Volume >40%
All outdoor watering and irrigation of lawns and
ground covers is prohibited with the exception of
plant materials classified and determined by the City
Manager to be rare, exceptionally valuable, or
essential to the well- being of the public at large or
rare animals, and for which relief has been otherwise
granted.

Yes

5 Other - Prohibit vehicle washing except
at facilities using recycled or
recirculating water
Volume >40%
The washing of automobiles, trucks, trailers, boats,
airplanes and other types of mobile equipment is
prohibited. Washing is permitted at any time on the
immediate premises of a commercial car wash.

Commercial car washes shall only use partially
reclaimed or recycled water.

Yes
5 Other water feature or swimming pool
restriction Volume >40%
The filling, refilling, or adding of water to swimming
pools and spas or ornamental ponds, streams, and
artificial lakes is
prohibited.

Yes
5 Water Features - Restrict water use for
decorative water features, such as
fountains Volume >40%
The operation of any ornamental fountain, pond, or
similar structure is prohibited except for short periods of time to prevent
damage.

Yes
5 Other Volume >40% The use of water for cooling mists is prohibited. Yes
5 CII - Other CII restriction or prohibition Volume >40% The use of water for commercial, manufacturing, or
processing purposes shall be reduced in volume by an
amount determined by the
General Manager.

Yes
5 Other Volume >40% No new construction
meters will be issued. Yes
5 Other Volume >40%
Construction water shall not be used for earth work,
road construction purposes, dust control,
compaction, or trenching jetting.

Yes
5 Other Volume >40%
No new building permit(s) shall be provided, except in
the following circumstances:
(a) For projects necessary to protect the public's
health, safety, and welfare (b) When using reclaimed
water ( c) When the recipient of the building permit
can demonstrate that no net increase in water use
will occur ( d) Where the recipient of the building
permit provides a conservation offset.

Yes
6 Other Volume >40%
Except as otherwise provided, all water conservation
and drought response measures of Water
Conservation Stages 1, 2, 3 and 4 shall be in full force and effect during Water Conservation
Stage 5.

Yes
6 Landscape - Other landscape restriction
or prohibition Volume >40%
All outdoor watering and irrigation of lawns and
ground cover, and landscaping is prohibited, with the
exception of the use of recycled water to irrigate fruit trees, lawns and ground covers, and ornamental trees
and shrubs, which is permitted on any day
and at any time.

Yes
6 CII - Other CII restriction or prohibition Volume >40% The city shall not allow
any new connections to the water system.

Yes
NOTES: Restrictions and prohibitions for each stage are additive to the stage before. Irrigation restrictions become progressively more strict with each stage. Shortage gap reduction shown is the total estimated reduction for all actions under the Shortage Level.

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

City Name 60 Day Notice
Drop Down (yes/no)
Notice of Public
Hearing
Drop Down (yes/no)
Home Gardens County
Water District
Yes Yes
Western Municipal
Water District
Yes Yes
City of Norco Yes Yes
Orange County
Sanitation District
Yes Yes
City of Riverside Yes Yes
Temescal Valley Water
District
Yes Yes
Yorba Linda Water
District
Yes Yes
City of Eastvale Yes Yes
City of Jurupa Valley Yes Yes
Jurupa Community
Services District
Yes Yes
City of Lake Elsinore Yes Yes
Elsinore Valley Municipal
Water District
Yes Yes
Home Gardens Sanitary
District
Yes Yes
Metropolitan Water
District
Yes Yes
Rancho California Water
District
Yes Yes
Riverside Public Utilities Yes Yes
County Name
Drop Down List
60 Day Notice
Drop Down (yes/no)
Notice of Public
Hearing
Drop Down (yes/no)
Riverside County Yes Yes
Submittal Table 10-1 Retail: Notification to Cities and Counties Water Code Section 10621(b) and 10642
Add additional rows as needed
Add additional rows as needed
NOTES:

Appendices
City of Corona
2025 Urban Water Management Plan
Appendix E – 2021 through 2025 Corona Consumer Confidence Reports

PRIMARY STANDARDS - Mandatory Health-Related Standards State PHG State Range Parameter Units MCL (MCLG) DLR Average
[MRDL] [MRDLG]

CLARITY
Combined Filter % 95(a) % < 0.3 100% Metropolitan Water District Effluent Turbidity NTU TT 0.3 NA -- Highest 0.06 Henry J. Mills Water Treatment Plant Combined Filter % 95(a) % < 0.3 100% City of Corona, Lester & Sierra Del Oro Effluent Turbidity NTU TT 0.3 NA -- Highest 0.08 Water Treatment Facilities State PHG State Range
Parameter Units MCL (MCLG) DLR Average
[MRDL] [MRDLG]

MICROBIOLOGICAL CONTAMINANTS
Total Coliform Bacteria
(State Total Coliform Rule) % 5.0 (b) (0)
Fecal Coliform and E. Coli
(State Total Coliform Rule) (c) (c) (0)
Total Coliform Bacteria
(Federal Total Coliform Rule) % TT (d)
Fecal Coliform and E. Coli
(Federal Total Coliform Rule) (e) (e) (0)
Heterotrophic Plate Count Range Distribution System Wide: ND-140 (HPC) CFU/mL TT NA NA Average Distribution System Wide: 1 State PHG State Range State Colorado Arlington Ground Treated Parameter Units MCL (MCLG) DLR Average Project River Water (z) Water Average [MRDL] [MRDLG] Water Water System Water
RADIOACTIVE CONTAMINANTS (f)
Gross Alpha Range ND - 4 ND - 3.6 ND - 4 ND - 18
Particle Activity (k) pCi/L 15 (0) 3 Average ND ND ND 5.5 Range ND - 2 2.8 - 3.4 ND - 8.3 ND - 20
Uranium pCi/L 20 0.43 1 Average ND 3 1 6

INORGANIC CONTAMINANTS
Range ND - 3.7 ND - 3.4 ND - 2.2
Arsenic µg/L 10 0.004 2 Average ND ND ND
Range - ND - 0.14 ND - 0.12
Barium mg/L 1 2 0.1 Average - ND ND
Range 0.5 - 0.9 ND - 0.9 0.23 - 2.3 ND - 0.79
Fluoride (e, h) mg/L 2.0 1 0.1 Average 0.8 0.74 0.40 0.23 Range ND - 6.5 ND - 22 ND - 6.9
Nitrate (as Nitrogen) (k, t) mg/L 0.4 Average 1 10 2.0
Range ND - 2.4 ND - 9.8 ND - 3.0
Perchlorate (k, s, t) µg/L 6 1 2
Average ND 3.4 ND
Range ND - 5.1 ND - 5.3
Selenium µg/L 50 30 5
Average ND ND
SYNTHETIC ORGANIC CONTAMINANTS including Pesticides/PCBs Dibromochloro- Range ND - 12 ND - 23
propane (DBCP) ng/L 200 3 10 Average ND ND
Range ND - 0.021
1,2,3-Trichloropropane (1,2,3-
TCP)(k, t, u)
µg/L 0.005 0.0007 0.005 Average ND

VOLATILE ORGANIC CONTAMINANTS
Tetrachloroethylene Range ND - 0.8
(PCE) µg/L 5 0.06 0.5 Average ND
Trichloroethylene Range ND - 1.3
(TCE) µg/L 5 1.7 0.5 Average ND
SECONDARY STANDARDS - Aesthetic Standards
Range ND - 85 ND - 85 ND - 380
Aluminum (i) µg/L 200 600 50 Max RAA ND ND 130
Range 75 -93 90 - 92 12 - 93 86 - 240 13 - 120
Chloride mg/L 500 NA NA Average 84 91 75 170 61
Corrosivity Range 12.0 - 12.2 12.0 - 12.2 12.5 - 13.3 11 - 13 (as Aggressiveness Index) AI NA NA NA Average 12.1 9.92 12.8 12 Range ND - 110
Iron µg/L 300 NA 100 Average ND
Range ND - 140
Manganese (f, k) µg/L 50 NL=500 20 Average ND
Range ND - 3.4 ND - 2
Odor Threshold Units 3 NA 1 Average 0.39 1
Specific µS/ Range 536 - 612 924 - 948 370 - 612 1,100 - 2,000 81 - 1,207 Conductance (k) cm 1600 NA NA Average 574 936 571 1,424 592 Range 52 - 67 205 - 210 8.0 - 74 150 - 400 3.5 - 220
Sulfate mg/L 500 NA 0.5 Average 60 208 61 217 108
Total Dissolved Range 284 - 331 586 - 598 220-400 710 - 1,300 35 - 730 Solids (j, k, t) mg/L 1000 NA NA Average 298 592 320 902 338 Range 0.6 - 3.0 ND - 0.62 ND - 0.99 0.14 - 0.3
Turbidity NTU 5 NA 0.1 Average 1.8 ND 0.26 0.2
ND
ND
ND
ND
ND
ND
ND
ND
2 -
-
ND
Discharges of oil drilling wastes and from metal refineries; erosion of natural deposits
Erosion of natural deposits; runoff from orchards; glass and electronics production wastes
Erosion of natural deposits; water additive that promotes strong teeth; discharge from fertilizer and aluminum
factories
Perchlorate is an inorganic chemical used in solid rocket propellant, fireworks, explosives, flares, matches, and a variety of industries. It usually gets into drinking water as a result of environmental contamination from historic
aerospace or other industrial operations that used or use, store, or dispose of perchlorate and its salts.

Discharge from petroleum, glass, and metal refineries;
erosion of natural deposits; discharge from mines and
chemical manufacturers; runoff from livestock lots (feed additive).

Runoff/leaching from natural deposits; industrial wastes Human and animal fecal waste
ND
Soil runoff
10 (as N)
10 (as N)
Discharge from factories, dry cleaners, and auto shops
(metal degreaser)
Runoff/leaching from natural deposits; seawater influence Banned nematocide that may still be present in soils due to runoff/leaching from former use on soybeans, cotton,
vineyards, tomatoes, and tree fruit
ND
Naturally-occurring organic materials
Discharge from metal degreasing sites and other factories ND
Leaching from natural deposits
Substances that form ions when in water; seawater
influence
Runoff/leaching from natural deposits
City of Corona, Utilities Department
2021 Water Quality Report
Human and animal fecal waste
Runoff and leaching from fertilizer use; leaching from
septic tanks and sewage; erosion of natural deposits
Erosion of natural deposits
Soil runoff
ND
Major Sources in Drinking Water
ND
Naturally present in the environment
Naturally present in the environment Highest % of positive samples collected in any one month = 0% Total number of positive samples collected in 2021 = 0
ND
Highest % of positive samples collected in any one month = 0% Major Sources in Drinking Water
Naturally present in the environment
Erosion of natural deposits
--
--
Major Sources in Drinking Water
Soil runoff
--
-- -- Total number of positive samples collected in 2021 = 0 Water Source
Regulated in Distribution System
--
ND
ND
ND
ND
--
-- --
ND
ND
-
-
-
ND -
Leaching from natural deposits; industrial wastes

2.1 0.14

0.3 ND
ND
Elemental balance in water; affected by temperature, other factors
ND
Erosion of natural deposits; residual from some surface water treatment processes
Discharge from industrial and agricultural chemical
factories; leaching from hazardous waste sites; used as cleaning and maintenance solvent, paint and varnish
remover, and cleaning and degreasing agent; byproduct
during the production of other compounds and pesticides. 8 ND
-
2 ND
ND
-
ND
ND

UNREGULATED CONTAMINANTS WITH NO MCLs (g) Health Effects Range 0.32 - 4.3 0.14 - 0.41
Boron (p) mg/L NL=1 NA 0.1 Average 1.7 0.26
Range ND - 3.9 ND - 3.2
Hexavalent Chromium µg/L NA 0.02 1 Average ND ND
Perfluorobutane Sulfonic Range ND - 2.9 ND - 42 ND - 4.5 (PFBS) ng/L NL=500 NA NA Average 0.37 17 ND
Perfluorooctanoic Acid Range ND - 4.7 ND - 230 ND - 7.5 (PFOA) ng/L NL=5.1 NA NA Average 0.63 66 2.2
Perfluorooctanesulfonate Range ND - 5.9 ND - 300 ND - 5.9 acid (PFOS) ng/L NL=6.5 NA NA Average 0.72 74 ND
Range ND - 5.7 ND - 17 ND - 3.4
Vanadium µg/L NL=50 NA 3 Average ND 5 ND
OTHER PARAMETERS State PHG State Range State Colorado Arlington Ground Treated Chemical Units MCL (MCLG) DLR Average Project River Water Water Average [MRDL] [MRDLG] Water Water System Water
Range 79 - 91 129 - 132 79 - 160 170 - 390 17 - 150
Alkalinity mg/L NA NA NA Average 85 130 98 256 72
Range 210 - 470 ND - 190
Bicarbonate mg/L NA NA NA Average 311 86
Range 24 - 26 24 - 70 72 - 180 2.4 - 110
Calcium mg/L NA NA NA Average 25 32 127 41
Range 111 - 119 270 - 282 110 - 210 260 - 740 8.4 - 430 mg/L NA NA NA Average 115 276 130 462 169
Range 25 - 26 5.6 - 14 20 - 77 0.59 - 38
Magnesium mg/L NA NA NA Average 26 11 35 15
pH Range 8.2 - 8.5 7.0 - 10 6.1 - 7.8 7.2 - 8.9
pH Units NA NA NA Average 8.4 8.4 7.1 8.0
Range 3.0 - 3.4 4.3 - 4.5 1.0 - 3.5 1.5 - 14 ND - 4.5
Potassium mg/L NA NA NA Average 3.2 4.4 3.2 4.9 2.6
Range 60 - 76 91 - 92 23 - 76 50 - 170 19 - 92
mg/L NA NA NA Average 68 92 64 116 56
Perfluorobutane sulfonic acid exposures resulted in
decreased thyroid hormone in pregnant female mice.
-
ND ND
- -
Perfluorooctanoic acid exposures resulted in increased
liver weight in laboratory animals.
3 ND
ND
ND

0.19 0.13
The babies of some pregnant women who drink water
containing vanadium in excess of the notification level may have an increased risk of developmental effects,
based on studies in laboratory animals.

The babies of some pregnant women who drink water
containing boron in excess of the notification level may have an increased risk of developmental effects, based on studies in laboratory animals.

Perfluorooctanesulfonic acid exposures resulted in
immune suppression, specifically, a decrease in antibody response to an exogenous antigen challenge.

Sodium (r)
Hardness (q)

8.3 12
Discharge from electroplating factories, leather tanneries, wood preservation, chemical synthesis, refractory
production, and textile manufacturing facilities; erosion of natural deposits.

ND

0.156
68 ND
ND
ND
ND

Parameter Units
State
MCL
[MRDL]
PHG
(MCLG)
[MRDLG]
State
DLR
Range
Average/LRAA/RAA
Distribution
System Wide Health Effects Language
Range ND-37
µg/L 80 NA 1 LRAA 29.5
Range ND-12
Haloacetic Acids (HAA5)
(o) µg/L 60 NA 1 LRAA 11.4
Range ND - 8.6
µg/L 10 0.1 1 Max RAA 4.1
Range 0.92-2.68
mg/L NA Max RAA 1.94
Range 2.3-3.1
mg/L TT NA 0.3 Average 2.7
Control of DBP
precursors (TOC)
Various natural and manmade
sources
Total organic carbon (TOC) has no health effects. However, total organic carbon provides a medium for the formation of disinfection byproducts. These byproducts include trihalomethanes (THMs) and haloacetic acids (HAAs). Drinking water containing these byproducts in excess of the MCL may lead to adverse health effects, liver or kidney problems, or nervous system effects, and may lead to an increased risk of cancer. [4 as Cl2]
Byproduct of drinking water
disinfection
Some people who drink water containing haloacetic acids in excess of the MCL over many years may have an increased risk of getting cancer.

Bromate (Mills - WR-24
Conn.) (l)
Byproduct of drinking water
disinfection
Some people who drink water containing bromate in excess of the MCL over many years may have an increased risk of getting cancer.

Chloramines [4 as Cl2]
Drinking water disinfectant
added for treatment
Some people who use water containing chloramines well in excess of the MRDL could experience irritating effects to their eyes and nose. Some people who drink water containing chloramines well in excess of the MRDL could experience stomach discomfort or anemia.

Major Sources in Drinking
Water
DISINFECTION BYPRODUCTS, DISINFECTANT RESIDUALS, AND DISINFECTION BYPRODUCT PRECURSORS FEDERAL RULE (m) Total Trihalomethanes
(TTHMs) (n)
Byproduct of drinking water
disinfection
Some people who drink water containing trihalomethanes in excess of the MCL over many years may experience liver, kidney, or central nervous system problems, and may have an increased risk of getting cancer.

State PHG State Range
Parameter Units MCL (MCLG) DLR Average
[MRDL] [MRDLG]
FEDERAL UNREGULATED CONTAMINANTS MONITORING RULE (UCMR 3) (v) List 1 - Assessment Monitoring
Range ND-0.14
1,4-Dioxane µg/L NA NA 0.07 Average ND
Range 75-360
Chlorate µg/L NA NA 20 Average 155
Range ND-0.52
Chromium µg/L NA NA 0.2 Average ND
Range ND-0.43
Hexavalent Chromium (Dissolved) µg/L NA NA 0.03 Average 0.134 Range ND-17
Molybdenum µg/L NA NA 1 Average 3.6
Range 25-1,100
Strontium µg/L NA NA 0.3 Average 591
Range ND-6.4
Vanadium µg/L NA NA 0.2 Average 2.4
Range ND-0.046
Perfluorooctanesulfonic acid - PFOS µg/L NA NA 0.04 Average ND Range ND-0.042
Perfluorooctanoic acid - PFOA µg/L NA NA 0.02 Average ND Range ND-0.013
Perfluoroheptanoic acid - PFHpA µg/L NA NA 0.01 Average ND State PHG State Range
Parameter Units MCL (MCLG) DLR Average
[MRDL] [MRDLG]
FEDERAL UNREGULATED CONTAMINANTS MONITORING RULE (UCMR 4) (w) Haloactic Acid (HAA) Group
Range ND-15.8
Average 5.9
Range ND-17.3
Average 6.1
Range ND-28
Average 10.2
Range ND-2600
Average 1925
Range ND-32
Average 15.3
Metals and Metalloids Group
Range ND-62
Manganese µg/L Average 2
HAA5 (o)
NA
HAA6Br (x)
HAA9 (y)
Bromide
NA NA
NA NA
µg/L NA NA NA
NA
µg/L
Distribution
System
µg/L NA NA NA
Total Organic Carbon µg/L NA NA
Distribution
System
NA
µg/L NA NA
NA

Footnotes
(a) The turbidity level of the filtered water shall be less than or equal to 0.3 NTU in 95% of the measurements taken each month and shall not exceed 1 NTU at any time. Turbidity, a measure of the cloudiness of the water, is an indicator of treatment performance.

The averages and ranges of turbidity shown in the Secondary Standards were based on the treatment plant effluent. (b) Total coliform MCLs: No more than 5.0% of the monthly samples may be total coliform-positive. Compliance is based on the combined distribution system sampling from all the treatment plants. In 2021, 1560 samples were analyzed and there were no positive detections for total coliform. The MCL was not violated. (c) E. coli MCL: The occurrence of two consecutive total coliform-positive samples, one of which contains E. coli, constitutes an acute MCL violation. The MCL was not violated.
(d) Total coliform TT trigger, Level 1 assessments, and total coliform TT violations: More than 5.0% total coliform-positive samples in a month trigger Level 1 assessments. Failure to conduct assessments and correct findings within 30 days is a total coliform violation. No triggers, Level 1 assessments, or violations occurred. (e) E. coli MCL and Level 2 TT triggers for assessments: Routine and repeat samples are total coliform-positive and either sample is E. coli-positive or system fails to collect all repeat samples following an E. coli-positive sample, or fails to test for E. coli when the repeat sample is total coliform-positive. No samples were E. coli-positive. No MCLs violations or no assessments occurred. (f) Results included in this section range from 2013-2021. (g) Unregulated contaminant monitoring helps the USEPA and the State Board determine where certain contaminants occur and whether the contaminants need to be regulated.
(h) City of Corona was in compliance with all provisions of the State's Fluoridation System Requirements. This is part of the City of Corona’s blending plan to reduce the levels of fluoride being delivered to the consumer's tap. Refer to the “Treated Average System Water” column for a more accurate representation of system water quality. (i) Aluminum has a secondary standard limit. In 2021, the secondary standard limit was exceeded but the maximum running annual average (Max RAA) was in compliance. Our current Max RAA for 2022 is 180 ug/L. (j) Total Dissolved Solids (TDS) is a measure of the total amount of all the materials that are dissolved in water. These minerals, both natural and anthropogenic (made by humans), are mainly inorganic solids, with a minor amount of organic material. (k) This constituent was detected at levels exceeding the MCL, results shown in bold. Please note that this water is blended with water from other sources to provide customers with the highest quality drinking water. (l) Reported from Mills Filtration Plant Metropolitan Water District (MWD). Mills MWD water is blended with other Corona water sources. Please note that this water is blended with water from other sources to provide customers with the highest quality drinking water.
(m) The City of Corona was in compliance with all provisions of the Stage 2 Disinfectants and Disinfection Byproducts Rules (D/DBP).

Compliance was based on the locational running annual average (LRAA). The average reported reflects the highest TTHM and HAA5 LRAAs for the year.
(n) Total Trihalomethanes is the sum of bromodichloromethane, bromoform, chloroform, and dibromochloromethane. (o) HAA5 is the sum of dichloroacetic acid, trichloroacetic acid, monobromoacetic acid, dibromoacetic acid, and monochloroacetic acid.
(p) The sources that were detected for Boron are all directed to the Temescal Desalter for reverse osmosis treatment. The treated water is monitored at the effluent of the facility which is represented in the "Treated Average System Water" column. (q) Hardness is the sum of polyvalent cations present in the water, generally magnesium and calcium. The cations are usually naturally occurring.
(r) Sodium refers to the salt present in the water and is generally naturally occurring. (s) On June 17, 2021, the Office of Administrative Law approved the perchlorate detection limit for purposes of reporting (DLR) regulations adopted by the State Water Resources Control Board on October 6, 2020. The regulations took effect on July 1, 2021.

The DLR changed from 4 parts per billion to 2 ppb.
(t) Fluoride, nitrate, perchlorate, TDS, and 1,2,3-TCP are a part of Corona's blending remediation plan to reduce the levels being delivered to the consumer's tap. Refer to the "Treated Average System Water" column for a more accurate representation of system water quality.
(u) 1,2,3-Trichloropropane (1,2,3-TCP) had a notification level (NL) of 0.005 ug/L until December 14, 2017, when the MCL of 0.005 ug/L became effective. 1,2,3-TCP was monitored quarterly in Corona's source and treated waters for the State's initial monitoring requirement and continues to be monitored per our Blending Plan requirements. (v) Data was collected in 2014 and reported per UCMR 3 guidance. Minimum reporting levels are as stipulated in the Federal UCMR

3. List 1 - Assessment Monitoring consists of 21 chemical contaminants for which standard analytical methods were available. All analyses conducted by contract laboratories. Values listed in state DLR column are federal minimum reporting levels. (w) UCMR 4 sampling took place from 2018-2019. Minimum reporting levels are as stipulated in the Federal UCMR 4. Detected parameter results are included in the CCR.
(x) HAA6Br: Bromochloroacetic acid, bromodichloroacetic acid, dibromoacetic acid, dibromochloroacetic acid, monobromoacetic acid, and tribromoacetic acid.
(y) HAA9: Bromochloroacetic acid, bromodichloroacetic acid, chlorodibromoacetic acid, dibromoacetic acid, dichloroacetic acid, monobromoacetic acid, monochloroacetic acid, tribromoacetic acid, and trichloroacetic acid. (z) Water quality data reported for Arlington Water reflects water quality for all sources of Western Municipal Water District's Riverside System distributed during the reporting year. The sources of water within the Riverside System include treated groundwater from Western Municipal Water District's Arlington Desalter, Chino Desalter Authority’s Chino Desalter II, and Riverside Public Utilities, along with surface water from Metropolitan Water District's Mills Water Treatment Plant.

PRIMARY STANDARDS - Mandatory Health-Related Standards
State PHG State Range
Parameter Units MCL (MCLG) DLR Average
[MRDL] [MRDLG]

CLARITY
Combined Filter % 95(a) % < 0.3 100% Metropolitan Water District Effluent Turbidity NTU TT 0.3 NA -- Highest 0.06 Henry J. Mills Water Treatment Plant Combined Filter % 95(a) % < 0.3 100% City of Corona, Lester & Sierra Del Oro Effluent Turbidity NTU TT 0.3 NA -- Highest 0.09 Water Treatment Facilities State PHG State Range
Parameter Units MCL (MCLG) DLR Average
[MRDL] [MRDLG]

MICROBIOLOGICAL CONTAMINANTS
Total Coliform Bacteria
(State Total Coliform Rule) % 5.0 (b) (0)
Fecal Coliform and E. Coli
(State Total Coliform Rule) (c) (c) (0)
Total Coliform Bacteria
(Federal Total Coliform Rule) % TT (d)
Fecal Coliform and E. Coli
(Federal Total Coliform Rule) (e) (e) (0)
Heterotrophic Plate Count Range Distribution System Wide: ND-276 (HPC) CFU/mL TT NA NA Average Distribution System Wide: 1 State PHG State Range State Colorado Ground Treated
Parameter Units MCL (MCLG) DLR Average Project River Water Average [MRDL] [MRDLG] Water Water System Water
RADIOACTIVE CONTAMINANTS (f)
Gross Alpha Range ND - 4 ND - 3.6 ND - 15
Particle Activity (k) pCi/L 15 (0) 3 Average ND ND 4.5
Range ND - 2 2.8 - 3.4 ND - 25
Uranium pCi/L 20 0.43 1 Average ND 3 5.87

INORGANIC CONTAMINANTS
Range ND - 4.5 ND - 2.7
Arsenic µg/L 10 0.004 2 Average ND ND
Range ND - 0.16 ND - 0.12
Barium mg/L 1 2 0.1 Average ND ND
Range 0.6 - 0.8 0.27 - 2.3 ND - 0.79
Fluoride (e, h) mg/L 2.0 1 0.1 Average 0.7 0.40 0.21
Range ND - 22 ND - 6.5
Nitrate (as Nitrogen) (k, t) mg/L 0.4 Average 9.5 1.7
Range ND - 10 ND - 3.3
Perchlorate (k, s, t) µg/L 6 1 2
Average 3 ND
SYNTHETIC ORGANIC CONTAMINANTS including Pesticides/PCBs Range ND - 0.022
1,2,3-Trichloropropane (1,2,3-
TCP)(k, t, u)
µg/L 0.005 0.0007 0.005 Average ND

VOLATILE ORGANIC CONTAMINANTS
Tetrachloroethylene Range ND - 0.99
(PCE) µg/L 5 0.06 0.5 Average ND
Trichloroethylene Range ND - 1.1
(TCE) µg/L 5 1.7 0.5 Average ND
SECONDARY STANDARDS - Aesthetic Standards
Range ND - 150 ND - 360
Aluminum (i) µg/L 200 600 50 Max RAA 60 180
Range 76 - 73 95 - 101 110 - 230 14 - 200
Chloride mg/L 500 NA NA Average 76 98 176 70
Corrosivity Range 12.0 - 12.1 12.2 - 13.2 10.9 - 13
(as Aggressiveness Index) AI NA NA NA Average 12.0 12.8 11.6 Range ND - 120
µg/L 500 NA (50) Average 13
Range ND - 47
Iron µg/L 300 NA 100 Average ND
Range ND - 500
Manganese (f, k) µg/L 50 NL=500 20 Average 40
Range ND - 4
Odor Threshold Units 3 NA 1 Average ND
Specific µS/ Range 552 - 546 939 - 981 1,100 - 1,800 89 - 1,177 Conductance (k) cm 1,600 NA NA Average 534 960 1,393 606 Range 56 - 57 209 - 218 140 - 240 3.1 - 430
Sulfate mg/L 500 NA 0.5 Average 56 214 200 125
Total Dissolved Range 289 - 304 598 - 629 660 - 1,200 56 - 660 Solids (j, k, t) mg/L 1,000 NA NA Average 296 614 870 368 Range 1.3 - 2.3 ND - 0.31
Turbidity NTU 5 NA 0.1 Average 1.8 ND
UNREGULATED CONTAMINANTS WITH NO MCLs (g) Health Effects Range 0.34 - 4.0 0.14 - 0.38
Boron (p) mg/L NL=1 NA 0.1 Average 1.6 0.25
Range ND - 3.2
Hexavalent Chromium µg/L NA 0.02 1 Average ND
Range ND - 18 ND - 2.6
Vanadium µg/L NL=50 NA 3 Average 5.9 ND
ND
2 0.1

0.3 ND
ND
Elemental balance in water; affected by temperature, other factors
ND
Erosion of natural deposits; residual from some surface water treatment processes
Discharge from industrial and agricultural chemical
factories; leaching from hazardous waste sites; used as cleaning and maintenance solvent, paint and varnish
remover, and cleaning and degreasing agent; byproduct
during the production of other compounds and pesticides.

ND
ND
ND
-
ND
Leaching from natural deposits; industrial wastes
8 ND
ND
ND
Runoff/leaching from natural deposits
ND
--
ND
ND
ND
ND
--
-- --
--
--
Major Sources in Drinking Water
Soil runoff
--
-- -- Total number of positive samples collected in 2022 = 0 Water Source
Regulated in Distribution System
Naturally present in the environment Highest % of positive samples collected in any one month = 1% Total number of positive samples collected in 2022 = 0
Highest % of positive samples collected in any one month = 1% Major Sources in Drinking Water
Naturally present in the environment
City of Corona, Utilities Department
2022 Water Quality Report
Human and animal fecal waste
Runoff and leaching from fertilizer use; leaching from
septic tanks and sewage; erosion of natural deposits
Erosion of natural deposits
Discharge from electroplating factories, leather tanneries, wood preservation, chemical synthesis, refractory
production, and textile manufacturing facilities; erosion of natural deposits.

Soil runoff
Major Sources in Drinking Water
Naturally present in the environment
Discharge from metal degreasing sites and other factories ND
The babies of some pregnant women who drink water
containing vanadium in excess of the notification level may have an increased risk of developmental effects, based on studies in laboratory animals.

Leaching from natural deposits
Substances that form ions when in water; seawater
influence
The babies of some pregnant women who drink water
containing boron in excess of the notification level may have an increased risk of developmental effects, based on studies in laboratory animals.

Runoff/leaching from natural deposits; industrial wastes Human and animal fecal waste
ND
Soil runoff
10 (as N)
10 (as N)
Discharge from factories, dry cleaners, and auto shops
(metal degreaser)
Runoff/leaching from natural deposits; seawater influence ND
Naturally-occurring organic materials
-
-
ND
Discharges of oil drilling wastes and from metal refineries; erosion of natural deposits
Erosion of natural deposits; runoff from orchards; glass and electronics production wastes
Erosion of natural deposits; water additive that promotes strong teeth; discharge from fertilizer and aluminum
factories
Perchlorate is an inorganic chemical used in solid rocket propellant, fireworks, explosives, flares, matches, and a variety of industries. It usually gets into drinking water as a result of environmental contamination from historic
aerospace or other industrial operations that used or use, store, or dispose of perchlorate and its salts.

Erosion of natural deposits
ND
ND
ND
ND

0.13 ND
ND

0.16 ND
2 ND
ND
Foaming Agents - Methylene
Blue Active Substances ND ND ND Municipal and industrial waste discharges ND
ND

Perfluorobutane Sulfonic Range ND - 47 ND - 5.6
(PFBS) ng/L NL=500 NA NA Average 18 ND
Perfluorohexane Sulfonic Range ND - 52 ND - 6.6
Acid (PFHxS) ng/L NL=3 NA NA Average 20 ND
Perfluorooctanoic Acid Range ND - 250 ND - 8.5
(PFOA) ng/L NL=5.1 NA NA Average 71 ND
Perfluorooctanesulfonate Range ND - 270 ND - 11
acid (PFOS) ng/L NL=6.5 NA NA Average 77 ND

OTHER PARAMETERS
State PHG State Range State Colorado Ground Treated
Chemical Units MCL (MCLG) DLR Average Project River Water Average [MRDL] [MRDLG] Water Water System Water
Range 83 - 89 128 - 134 130 - 380 16 - 140
Alkalinity mg/L NA NA NA Average 86 131 237 73
Range 150 - 380 25 - 170
Bicarbonate mg/L NA NA NA Average 275 77
Range ND - 2
Carbonate mg/L NA NA NA Average 0.13
Range 25 -28 69 - 70 62 - 160 2.2 - 82
Calcium mg/L NA NA NA Average 26 70 124 40
Range 115 - 120 276 - 281 220 - 570 7.9 - 310
mg/L NA NA NA Average 118 278 439 162
Range 12 - 13 25 - 26 17 - 46 0.54 - 27
Magnesium mg/L NA NA NA Average 12 26 32 14
pH Range 8.2 - 8.4 8.2 - 8.3 6.4 - 8.1 7.3 - 9.1
pH Units NA NA NA Average 8.3 8.2 7.2 8.2
Range 3.6 - 3.8 4.5 - 4.8 1.8 - 14 ND - 5
Potassium mg/L NA NA NA Average 3.7 4.6 5.4 2.6
Range 60 - 61 90 - 96 55 - 170 19 - 98
mg/L NA NA NA Average 60 93 122 59
ND ND
Perfluorohexane sulfonic acid exposures resulted in
decreased total thyroid hormone in male rats.

ND
Sodium (r)
Hardness (q)
- -
ND
Perfluorobutane sulfonic acid exposures resulted in
decreased thyroid hormone in pregnant female mice.

ND ND
- -
Perfluorooctanoic acid exposures resulted in increased
ND liver weight in laboratory animals.

ND
Perfluorooctanesulfonic acid exposures resulted in
immune suppression, specifically, a decrease in antibody response to an exogenous antigen challenge.

ND
Perfluoroalkyl and Polyfluoroalkyl Substances (PFAS) with Notification Levels

Parameter Units
State
MCL
[MRDL]
PHG
(MCLG)
[MRDLG]
State
DLR
Range
Average/LRAA/RAA
Distribution
System Wide Health Effects Language
Range ND - 39
µg/L 80 NA 1 LRAA 31.3
Range ND - 12
Haloacetic Acids (HAA5)
(o) µg/L 60 NA 1 LRAA 10.1
Range ND - 14
µg/L 10 0.1 1 Max RAA 5.5
Range 0.2 - 3.04
mg/L NA Max RAA 1.94
Range 1.7 - 3.2
mg/L TT NA 0.3 Average 2.3
Chloramines
Drinking water disinfectant
added for treatment
Some people who use water containing chloramines well in excess of the MRDL could experience irritating effects to their eyes and nose. Some people who drink water containing chloramines well in excess of the MRDL could experience stomach discomfort or anemia.

Major Sources in Drinking
Water
DISINFECTION BYPRODUCTS, DISINFECTANT RESIDUALS, AND DISINFECTION BYPRODUCT PRECURSORS FEDERAL RULE (m) Total Trihalomethanes
(TTHMs) (n)
Byproduct of drinking water
disinfection
Some people who drink water containing trihalomethanes in excess of the MCL over many years may experience liver, kidney, or central nervous system problems, and may have an increased risk of getting cancer.

Control of DBP
precursors (TOC)
Various natural and
manmade sources
Total organic carbon (TOC) has no health effects. However, total organic carbon provides a medium for the formation of disinfection byproducts. These byproducts include trihalomethanes (THMs) and haloacetic acids (HAAs). Drinking water containing these byproducts in excess of the MCL may lead to adverse health effects, liver or kidney problems, or nervous system effects, and may lead to an increased risk of cancer. [4 as Cl2]
Byproduct of drinking water
disinfection
Some people who drink water containing haloacetic acids in excess of the MCL over many years may have an increased risk of getting cancer.

Bromate (Mills - WR-24
Conn.) (l)
Byproduct of drinking water
disinfection
Some people who drink water containing bromate in excess of the MCL over many years may have an increased risk of getting cancer.
[4 as Cl2]

State PHG State Range
Parameter Units MCL (MCLG) DLR Average
[MRDL] [MRDLG]
FEDERAL UNREGULATED CONTAMINANTS MONITORING RULE (UCMR 3) (v) List 1 - Assessment Monitoring
Range ND-0.14
1,4-Dioxane µg/L NA NA 0.07 Average ND
Range 75-360
Chlorate µg/L NA NA 20 Average 155
Range ND-0.52
Chromium µg/L NA NA 0.2 Average ND
Range ND-0.43
Hexavalent Chromium (Dissolved) µg/L NA NA 0.03 Average 0.134 Range ND-17
Molybdenum µg/L NA NA 1 Average 3.6
Range 25-1,100
Strontium µg/L NA NA 0.3 Average 591
Range ND-6.4
Vanadium µg/L NA NA 0.2 Average 2.4
Range ND-0.046
Perfluorooctanesulfonic acid - PFOS µg/L NA NA 0.04 Average ND Range ND-0.042
Perfluorooctanoic acid - PFOA µg/L NA NA 0.02 Average ND Range ND-0.013
Perfluoroheptanoic acid - PFHpA µg/L NA NA 0.01 Average ND State PHG State Range
Parameter Units MCL (MCLG) DLR Average
[MRDL] [MRDLG]
FEDERAL UNREGULATED CONTAMINANTS MONITORING RULE (UCMR 4) (w) Haloactic Acid (HAA) Group
Range ND-15.8
Average 5.9
Range ND-17.3
Average 6.1
Range ND-28
Average 10.2
Range ND-2600
Average 1925
Range ND-32
Average 15.3
Metals and Metalloids Group
Range ND-62
Average 2
Total Organic Carbon µg/L NA NA
Distribution
System
NA
µg/L NA NA
NA
µg/L
Distribution
System
µg/L NA NA NA
NA
µg/L NA NA NA
Manganese µg/L NA
HAA5 (o)
NA
HAA6Br (x)
HAA9 (y)
Bromide
NA NA
NA

Footnotes
(a) The turbidity level of the filtered water shall be less than or equal to 0.3 NTU in 95% of the measurements taken each month and shall not exceed 1 NTU at any time. Turbidity, a measure of the cloudiness of the water, is an indicator of treatment performance.

The averages and ranges of turbidity shown in the Secondary Standards were based on the treatment plant effluent. (b) Total coliform MCLs: No more than 5.0% of the monthly samples may be total coliform-positive. Compliance is based on the combined distribution system sampling from all the treatment plants. In 2022, 1563 samples were analyzed and there were no positive detections for total coliform. The MCL was not violated. (c) E. coli MCL: The occurrence of two consecutive total coliform-positive samples, one of which contains E. coli, constitutes an acute MCL violation. The MCL was not violated.
(d) Total coliform TT trigger, Level 1 assessments, and total coliform TT violations: More than 5.0% total coliform-positive samples in a month trigger Level 1 assessments. Failure to conduct assessments and correct findings within 30 days is a total coliform violation.

No triggers, Level 1 assessments, or violations occurred. (e) E. coli MCL and Level 2 TT triggers for assessments: Routine and repeat samples are total coliform-positive and either sample is E. coli-positive or system fails to collect all repeat samples following an E. coli-positive sample, or fails to test for E. coli when the repeat sample is total coliform-positive. No samples were E. coli-positive. No MCLs violations or no assessments occurred. (f) Results included in this section range from 2014-2022. (g) Unregulated contaminant monitoring helps the USEPA and the State Board determine where certain contaminants occur and whether the contaminants need to be regulated.
(h) City of Corona was in compliance with all provisions of the State's Fluoridation System Requirements. This is part of the City of Corona’s blending plan to reduce the levels of fluoride being delivered to the consumer's tap. Refer to the “Treated Average System Water” column for a more accurate representation of system water quality. (i) Aluminum has a secondary standard limit. In 2022 the secondary standard limit was exceeded at our Treatment Facility effluent with a Maximum Running Annual Average (Max RAA) of 212 ug/L. No consumer action is necessary since secondary standards for aluminum are established only for aesthetic effects (water color). We are continually calibrating our aluminum base coagulant to achieve the non-mandatory secondary standard limit of 200 ug/L. We expect to achieve this limit by the end of 2023. Our current Max RAA for 2023 is 115 ug/L.
(j) Total Dissolved Solids (TDS) is a measure of the total amount of all the materials that are dissolved in water. These minerals, both natural and anthropogenic (made by humans), are mainly inorganic solids, with a minor amount of organic material. (k) This constituent was detected at levels exceeding the MCL, results shown in bold. Please note that this water is blended with water from other sources to provide customers with the highest quality drinking water. (l) Reported from Mills Filtration Plant Metropolitan Water District (MWD). Mills MWD water is blended with other Corona water sources. Please note that this water is blended with water from other sources to provide customers with the highest quality drinking water.
(m) The City of Corona was in compliance with all provisions of the Stage 2 Disinfectants and Disinfection Byproducts Rules (D/DBP).

Compliance was based on the locational running annual average (LRAA). The average reported reflects the highest TTHM and HAA5 LRAAs for the year.
(n) Total Trihalomethanes is the sum of bromodichloromethane, bromoform, chloroform, and dibromochloromethane. (o) HAA5 is the sum of dichloroacetic acid, trichloroacetic acid, monobromoacetic acid, dibromoacetic acid, and monochloroacetic acid. (p) The sources that were detected for Boron are all directed to the Temescal Desalter for reverse osmosis treatment. The treated water is monitored at the effluent of the facility which is represented in the "Treated Average System Water" column. (q) Hardness is the sum of polyvalent cations present in the water, generally magnesium and calcium. The cations are usually naturally occurring.
(r) Sodium refers to the salt present in the water and is generally naturally occurring. (s) On June 17, 2021, the Office of Administrative Law approved the perchlorate detection limit for purposes of reporting (DLR) regulations adopted by the State Water Resources Control Board on October 6, 2020. The regulations took effect on July 1, 2021.

The DLR changed from 4 parts per billion to 2 ppb.
(t) Fluoride, nitrate, perchlorate, TDS, and 1,2,3-TCP are a part of Corona's blending remediation plan to reduce the levels being delivered to the consumer's tap. Refer to the "Treated Average System Water" column for a more accurate representation of system water quality.
(u) 1,2,3-Trichloropropane (1,2,3-TCP) had a notification level (NL) of 0.005 ug/L until December 14, 2017, when the MCL of 0.005 ug/L became effective. 1,2,3-TCP was monitored quarterly in Corona's source and treated waters for the State's initial monitoring requirement and continues to be monitored per our Blending Plan requirements. (v) Data was collected in 2014 and reported per UCMR 3 guidance. Minimum reporting levels are as stipulated in the Federal UCMR 3.

List 1 - Assessment Monitoring consists of 21 chemical contaminants for which standard analytical methods were available. All analyses conducted by contract laboratories. Values listed in state DLR column are federal minimum reporting levels. (w) UCMR 4 sampling took place from 2018-2019. Minimum reporting levels are as stipulated in the Federal UCMR 4. Detected parameter results are included in the CCR.
(x) HAA6Br: Bromochloroacetic acid, bromodichloroacetic acid, dibromoacetic acid, dibromochloroacetic acid, monobromoacetic acid, and tribromoacetic acid.
(y) HAA9: Bromochloroacetic acid, bromodichloroacetic acid, chlorodibromoacetic acid, dibromoacetic acid, dichloroacetic acid, monobromoacetic acid, monochloroacetic acid, tribromoacetic acid, and trichloroacetic acid.

PRIMARY STANDARDS - Mandatory Health-Related Standards State PHG State Range Parameter Units MCL (MCLG) DLR Average
[MRDL] [MRDLG]

CLARITY
Combined Filter % 95(a) % < 0.3 100% Metropolitan Water District Effluent Turbidity NTU TT 0.3 NA -- Highest 0.05 Henry J. Mills Water Treatment Plant Combined Filter % 95(a) % < 0.3 100% City of Corona, Lester & Sierra Del Oro Effluent Turbidity NTU TT 0.3 NA -- Highest 0.07 Water Treatment Facilities State PHG State Range
Parameter Units MCL (MCLG) DLR Average
[MRDL] [MRDLG]

MICROBIOLOGICAL CONTAMINANTS
Total Coliform Bacteria
(State Total Coliform Rule) % 5.0 (b) (0)
Fecal Coliform and E. Coli
(State Total Coliform Rule) (c) (c) (0)
Total Coliform Bacteria
(Federal Total Coliform Rule) % TT (d)
Fecal Coliform and E. Coli
(Federal Total Coliform Rule) (e) (e) (0)
Heterotrophic Plate Count Range Distribution System Wide: ND-884 (HPC) CFU/mL TT NA NA Average Distribution System Wide: 5 State PHG State Range State Colorado Ground Treated
Parameter Units MCL (MCLG) DLR Average Project River Water Average [MRDL] [MRDLG] Water Water System Water
RADIOACTIVE CONTAMINANTS (f)
Gross Alpha Range ND - 3.2 ND - 15
Particle Activity (k) pCi/L 15 (0) 3 Average ND 4.7
Range 2.8 - 3.1 ND - 23
Uranium pCi/L 20 0.43 1 Average 2.9 6.53

INORGANIC CONTAMINANTS
Range ND - 5.4 ND
Arsenic µg/L 10 0.004 2 Average ND ND
Range ND - 0.12 ND - 0.13
Barium mg/L 1 2 0.1 Average ND ND
Range 0.6 - 0.8 0.3 - 0.4 0.1 - 1.7 ND - 0.72
Fluoride (e, h) mg/L 2.0 1 0.1 Average 0.7 0.4 0.4 0.2
Range ND - 20 ND - 6.2
Nitrate (as Nitrogen) (k, t) mg/L 0.4 Average 8.9 2.1
Range ND - 9.4 ND - 3.3
µg/L 6 1 2
Average 2.8 ND
SYNTHETIC ORGANIC CONTAMINANTS including Pesticides/PCBs Range ND - 0.019
1,2,3-Trichloropropane (1,2,3-
TCP)(k, t, u)
µg/L 0.005 0.0007 0.005 Average ND

VOLATILE ORGANIC CONTAMINANTS
Dichloromethane Range ND - 1.1
(methylene chloride) µg/L 5 4 0.5 Average ND
Tetrachloroethylene Range ND - 0.63
(PCE) µg/L 5 0.06 0.5 Average ND
Trichloroethylene Range ND - 1.4
(TCE) µg/L 5 1.7 0.5 Average 0.53
SECONDARY STANDARDS - Aesthetic Standards
Range ND - 68 ND - 280
Aluminum (i) µg/L 200 600 50 Max RAA 60 115
Range 38 - 44 102 - 116 110 - 210 16 - 120
Chloride mg/L 500 NA NA Average 41 109 166 64
Corrosivity Range 11.9 - 12.1 12 - 13 9.6-13
(as Aggressiveness Index) AI NA NA NA Average 12.0 13 11 Range ND - 120
µg/L 500 NA (50) Average 15
Range ND - 500
Manganese (f, k) µg/L 50 NL=500 20 Average 38
Range ND - 2 ND - 1
Odor Threshold Units 3 NA 1 Average ND ND
Specific µS/ Range 357 - 359 995 - 1,030 980 - 1,800 85 - 1,177 Conductance (k) cm 1,600 NA NA Average 358 1,010 1,339 573 Range 32 - 50 219 - 253 120 - 240 3.6 - 240
Sulfate mg/L 500 NA 0.5 Average 41 236 189 109
Total Dissolved Range 200 - 207 623 - 671 490 - 1,100 68 - 680 Solids (j, k, t) mg/L 1,000 NA NA Average 204 647 832 351 Range 0.4 - 0.5 ND - 0.4
Turbidity NTU 5 NA 0.1 Average 0.4 0.13
UNREGULATED CONTAMINANTS WITH NO MCLs (g) Health Effects Range 0.33 - 3.4 0.13 - 0.37
Boron (p) mg/L NL=1 NA 0.1 Average 1.4 0.24
Range ND - 3.1
Hexavalent Chromium µg/L NA 0.02 1 Average ND
Range ND - 19 ND - 3.4
Vanadium µg/L NL=50 NA 3 Average 6.2 ND
ND
Foaming Agents - Methylene
Blue Active Substances
(MBAS)

ND ND ND
Municipal and industrial waste discharges

3.3 ND

0.13 ND
2 -
ND
-
-
ND
Discharges of oil drilling wastes and from metal refineries; erosion of natural deposits
Erosion of natural deposits; runoff from orchards; glass and electronics production wastes
Erosion of natural deposits; water additive that promotes strong teeth; discharge from fertilizer and aluminum
factories
Perchlorate is an inorganic chemical used in solid rocket propellant, fireworks, explosives, flares, matches, and a variety of industries. It usually gets into drinking water as a result of environmental contamination from historic
aerospace or other industrial operations that used or use, store, or dispose of perchlorate and its salts.

Erosion of natural deposits
10 (as N)
10 (as N)
Discharge from factories, dry cleaners, and auto shops
(metal degreaser)
Runoff/leaching from natural deposits; seawater influence ND
Naturally-occurring organic materials
ND
ND
ND
ND
Discharge from metal degreasing sites and other factories ND
Vanadium exposures resulted in developmental and
reproductive effects in rats.

Leaching from natural deposits
Substances that form ions when in water; seawater
influence
Boron exposures resulted in decreased fetal weight
(developmental effects) in newborn rats.

City of Corona, Utilities Department
2023 Water Quality Report
Human and animal fecal waste
Runoff and leaching from fertilizer use; leaching from
septic tanks and sewage; erosion of natural deposits
Erosion of natural deposits
Discharge from electroplating factories, leather tanneries, wood preservation, chemical synthesis, refractory
production, and textile manufacturing facilities; erosion of natural deposits.

Soil runoff
Major Sources in Drinking Water
Naturally present in the environment
Regulated in Distribution System
Naturally present in the environment Highest % of positive samples collected in any one month = 1% Total number of positive samples collected in 2023 = 0
Highest % of positive samples collected in any one month = 1% Major Sources in Drinking Water
Naturally present in the environment
Human and animal fecal waste
ND
--
--
Major Sources in Drinking Water
Soil runoff
--
-- -- Total number of positive samples collected in 2023 = 0 Water Source
ND
--
ND
ND
ND

0.8 --
-- --
ND
Runoff/leaching from natural deposits
ND
ND
Erosion of natural deposits; residual from some surface water treatment processes
Discharge from industrial and agricultural chemical
factories; leaching from hazardous waste sites; used as cleaning and maintenance solvent, paint and varnish
remover, and cleaning and degreasing agent; byproduct
during the production of other compounds and pesticides.

ND
Runoff/leaching from natural deposits; industrial wastes ND
Soil runoff

0.14 ND

0.12 ND
ND
Elemental balance in water; affected by temperature, other factors
ND
ND ND ND Discharge from factories, dry cleaners, and auto shops (metal degreaser)
Perchlorate (k, s, t)
ND
8 ND
ND

Perfluorobutane Sulfonic Range 2.7-5.1 ND - 2.2
(PFBS) ng/L NL=500 NA NA Average 19 ND
Perfluorohexane Sulfonic Range ND - 58
Acid (PFHxS) ng/L NL=3 NA NA Average 20
Perfluorooctanoic Acid Range ND - 240 ND - 3.3
(PFOA) ng/L NL=5.1 NA NA Average 71 ND
Perfluorooctanesulfonate Range ND - 240 ND - 3.5
acid (PFOS) ng/L NL=6.5 NA NA Average 89 ND
OTHER PARAMETERS State PHG State Range State Colorado Ground Treated Chemical Units MCL (MCLG) DLR Average Project River Water Average [MRDL] [MRDLG] Water Water System Water
Range 57 - 64 122 - 131 110 - 380 17 - 140
Alkalinity mg/L NA NA NA Average 60 126 227 70
Range 110 - 380 17 - 140
Bicarbonate mg/L NA NA NA Average 227 70
Range 17 - 20 70 - 71 48 - 150 2.3 - 84
Calcium mg/L NA NA NA Average 18 70 115 38
Range 79 - 80 180 - 530 7.9 - 310
mg/L NA NA NA Average 80 409 157
Range 7.8 - 8.9 14 - 44 0.52 - 30
Magnesium mg/L NA NA NA Average 8.4 30 14
pH Range 8.5 - 8.7 8.1 - 8.2 7.6 - 8.0 7.3 - 9.5
pH Units NA NA NA Average 8.6 8.2 7.8 7.5
Range 4.7 - 5.1 2.3 - 12 ND - 6
Potassium mg/L NA NA NA Average 4.9 5.2 3.7
Range 39 - 40 95 - 108 56 - 160 18 - 100
mg/L NA NA NA Average 40 102 122 58
ND
Perfluoroalkyl and Polyfluoroalkyl Substances (PFAS) with Notification Levels, Analyzed by EPA Methods 533 and 537.1 (s, t) - -
Perfluorooctanoic acid exposures resulted in increased
ND liver weight in laboratory animals.

ND
Perfluorooctanesulfonic acid exposures resulted in
immune suppression, specifically, a decrease in antibody response to an exogenous antigen challenge.

ND
Perfluorobutane sulfonic acid exposures resulted in
ND ND decreased thyroid hormone in pregnant female mice.

ND
Sodium (r)
Hardness (q)

2.5 290
27 ND ND
Perfluorohexane sulfonic acid exposures resulted in
decreased total thyroid hormone in male rats.

Parameter Units
State
MCL
[MRDL]
PHG
(MCLG)
[MRDLG]
State
DLR
Range
Average/LRAA/RAA
Distribution
System Wide Health Effects Language
Range ND - 57
µg/L 80 NA 1 LRAA 48.5
Range ND - 11
Haloacetic Acids (HAA5)
(o) µg/L 60 NA 1 LRAA 10.3
Range ND - 20
µg/L 10 0.1 1 Max RAA 6.7
Range 1.25 - 2.92
mg/L NA Max RAA 2.00
Range ND - 2.7
mg/L TT NA 0.3 Average 2.2
Control of DBP
precursors (TOC)
Various natural and
manmade sources
Total organic carbon (TOC) has no health effects. However, total organic carbon provides a medium for the formation of disinfection byproducts. These byproducts include trihalomethanes (THMs) and haloacetic acids (HAAs). Drinking water containing these byproducts in excess of the MCL may lead to adverse health effects, liver or kidney problems, or nervous system effects, and may lead to an increased risk of cancer. [4 as Cl2]
Byproduct of drinking water
disinfection
Some people who drink water containing haloacetic acids in excess of the MCL over many years may have an increased risk of getting cancer.

Bromate (Mills - WR-24
Conn.) (l)
Byproduct of drinking water
disinfection
Some people who drink water containing bromate in excess of the MCL over many years may have an increased risk of getting cancer.

Chloramines [4 as Cl2]
Drinking water disinfectant
added for treatment
Some people who use water containing chloramines well in excess of the MRDL could experience irritating effects to their eyes and nose. Some people who drink water containing chloramines well in excess of the MRDL could experience stomach discomfort or anemia.

Major Sources in Drinking
Water
DISINFECTION BYPRODUCTS, DISINFECTANT RESIDUALS, AND DISINFECTION BYPRODUCT PRECURSORS FEDERAL RULE (m) Total Trihalomethanes
(TTHMs) (n)
Byproduct of drinking water
disinfection
Some people who drink water containing trihalomethanes in excess of the MCL over many years may experience liver, kidney, or central nervous system problems, and may have an increased risk of getting cancer.

State PHG State Range
Parameter Units MCL (MCLG) DLR Average
[MRDL] [MRDLG]
FEDERAL UNREGULATED CONTAMINANTS MONITORING RULE (UCMR 4) (v) Haloactic Acid (HAA) Group
Range ND-15.8
Average 5.9
Range ND-17.3
Average 6.1
Range ND-28
Average 10.2
Range ND-2600
Average 1925
Range ND-32
Average 15.3
Metals and Metalloids Group
Range ND-62
Average 2
State PHG State Range
Parameter Units MCL (MCLG) DLR Average
[MRDL] [MRDLG]
FEDERAL UNREGULATED CONTAMINANTS MONITORING RULE (UCMR 5) (w) Lithium by ICP
Range ND-55.1
Average 20
EPA 533
Range ND-0.0076
Average ND
Range ND-0.0038
Average ND
Range ND-0.0033
Average ND
Range ND-0.0061
Average ND
Manganese µg/L NA NA
HAA5 (o)
NA
HAA6Br (x)
HAA9 (y)
Bromide
NA NA
Distribution
System
µg/L NA NA NA
NA
µg/L NA NA NA
Total Organic Carbon µg/L NA NA
NA
µg/L NA NA
NA
µg/L
Distribution
System
Lithium µg/L NA NA 9
PFBA µg/L NA NA 0.005
PFHxA µg/L NA NA 0.003
PFHxS µg/L NA NA 0.003
PFPeA µg/L NA NA 0.003

Footnotes
(a) The turbidity level of the filtered water shall be less than or equal to 0.3 NTU in 95% of the measurements taken each month and shall not exceed 1 NTU at any time. Turbidity, a measure of the cloudiness of the water, is an indicator of treatment performance.

The averages and ranges of turbidity shown in the Secondary Standards were based on the treatment plant effluent. (b) Total coliform MCLs: No more than 5.0% of the monthly samples may be total coliform-positive. Compliance is based on the combined distribution system sampling from all the treatment plants. In 2023, 1540 samples were analyzed and there were three positive detections for total coliform. The MCL was not violated. (c) E. coli MCL: The occurrence of two consecutive total coliform-positive samples, one of which contains E. coli, constitutes an acute MCL violation. The MCL was not violated.
(d) Total coliform TT trigger, Level 1 assessments, and total coliform TT violations: More than 5.0% total coliform-positive samples in a month trigger Level 1 assessments. Failure to conduct assessments and correct findings within 30 days is a total coliform violation.

No triggers, Level 1 assessments, or violations occurred. (e) E. coli MCL and Level 2 TT triggers for assessments: Routine and repeat samples are total coliform-positive and either sample is E. coli-positive or system fails to collect all repeat samples following an E. coli-positive sample, or fails to test for E. coli when the repeat sample is total coliform-positive. No samples were E. coli-positive. No MCLs violations or no assessments occurred. (f) Results included in this section range from 2015-2023. (g) Unregulated contaminant monitoring helps the USEPA and the State Board determine where certain contaminants occur and whether the contaminants need to be regulated.
(h) City of Corona was in compliance with all provisions of the State's Fluoridation System Requirements. This is part of the City of Corona’s blending plan to reduce the levels of fluoride being delivered to the consumer's tap. Refer to the “Treated Average System Water” column for a more accurate representation of system water quality. (i) Aluminum has a secondary standard limit. In 2023 the secondary standard limit was exceeded at our Treatment Facility effluent with a Maximum Running Annual Average (Max RAA) of 115 ug/L. No consumer action is necessary since secondary standards for aluminum are established only for aesthetic effects (water color). We are continually calibrating our aluminum base coagulant to achieve the non-mandatory secondary standard limit of 200 ug/L. (j) Total Dissolved Solids (TDS) is a measure of the total amount of all the materials that are dissolved in water. These minerals, both natural and anthropogenic (made by humans), are mainly inorganic solids, with a minor amount of organic material. (k) This constituent was detected at levels exceeding the MCL, results shown in bold. Please note that this water is blended with water from other sources to provide customers with the highest quality drinking water. (l) Reported from Mills Filtration Plant Metropolitan Water District (MWD). Mills MWD water is blended with other Corona water sources. Please note that this water is blended with water from other sources to provide customers with the highest quality drinking water.
(m) The City of Corona was in compliance with all provisions of the Stage 2 Disinfectants and Disinfection Byproducts Rules (D/DBP).

Compliance was based on the locational running annual average (LRAA). The average reported reflects the highest TTHM and HAA5 LRAAs for the year.
(n) Total Trihalomethanes is the sum of bromodichloromethane, bromoform, chloroform, and dibromochloromethane. (o) HAA5 is the sum of dichloroacetic acid, trichloroacetic acid, monobromoacetic acid, dibromoacetic acid, and monochloroacetic acid.
(p) The sources that were detected for Boron are all directed to the Temescal Desalter for reverse osmosis treatment. The treated water is monitored at the effluent of the facility which is represented in the "Treated Average System Water" column. (q) Hardness is the sum of polyvalent cations present in the water, generally magnesium and calcium. The cations are usually naturally occurring.
(r) Sodium refers to the salt present in the water and is generally naturally occurring. (s) Data are the average of the results from two analytical methods. (t) Fluoride, nitrate, perchlorate, TDS, 1,2,3-TCP, PFOA, PFOS, PFBS and PFHxS are a part of Corona's blending remediation plan to reduce the levels being delivered to the consumer's tap. Refer to the "Treated Average System Water" column for a more accurate representation of system water quality.
(u) 1,2,3-Trichloropropane (1,2,3-TCP) had a notification level (NL) of 0.005 ug/L until December 14, 2017, when the MCL of 0.005 ug/L became effective. 1,2,3-TCP was monitored quarterly in Corona's source and treated waters for the State's initial monitoring requirement and continues to be monitored per our Blending Plan requirements. (v) UCMR 4 sampling took place from 2018-2019. Minimum reporting levels are as stipulated in the Federal UCMR 4. Detected parameter results are included in the CCR.
(w) UCMR 5 sampling began in September 2023 and is scheduled to be completed by September 2024. Minimum reporting levels are as stipulated in the Federal UCMR 5. Detected parameter results are included in the CCR. (x) HAA6Br: Bromochloroacetic acid, bromodichloroacetic acid, dibromoacetic acid, dibromochloroacetic acid, monobromoacetic acid, and tribromoacetic acid.
(y) HAA9: Bromochloroacetic acid, bromodichloroacetic acid, chlorodibromoacetic acid, dibromoacetic acid, dichloroacetic acid, monobromoacetic acid, monochloroacetic acid, tribromoacetic acid, and trichloroacetic acid.

PRIMARY STANDARDS - Mandatory Health-Related Standards
State PHG State Range
Parameter Units MCL (MCLG) DLR/ Average
[MRDL] [MRDLG] CCRDL(RL)

CLARITY
Combined Filter % 95(a) % < 0.3 100% Metropolitan Water District Effluent Turbidity NTU TT 0.3 NA -- Highest 0.08 Henry J. Mills Water Treatment Plant Combined Filter % 95(a) % < 0.3 100% City of Corona, Lester & Sierra Del Oro Effluent Turbidity NTU TT 0.3 NA -- Highest 0.05 Water Treatment Facilities State PHG State Range
Parameter Units MCL (MCLG) DLR/ Average
[MRDL] [MRDLG] CCRDL(RL)

MICROBIOLOGICAL CONTAMINANTS
Total Coliform Bacteria
(State Total Coliform Rule) % 5.0 (b) (0)
Fecal Coliform and E. Coli
(State Total Coliform Rule) (c) (c) (0)
Total Coliform Bacteria
(Federal Total Coliform Rule) % TT (d)
Fecal Coliform and E. Coli
(Federal Total Coliform Rule) (e) (e) (0)
Heterotrophic Plate Count Range Distribution System Wide: ND-969 (HPC) CFU/mL TT NA NA Average Distribution System Wide:25 State PHG State Range State Colorado Ground Treated
Parameter Units MCL (MCLG) DLR/ Average Project River Water Average [MRDL] [MRDLG] CCRDL(RL) Water Water System Water
RADIOACTIVE CONTAMINANTS (f)
Gross Alpha Range ND - 3.2 ND - 7.5
Particle Activity (k) pCi/L 15 (0) 3 Average ND 3.84
Range 2.8 - 3.1 ND - 16.8
Uranium pCi/L 20 0.43 1 Average 2.9 4.71

INORGANIC CONTAMINANTS
Range ND - 6.5 ND - 2
Arsenic µg/L 10 0.004 2 Average ND ND
Range ND - 0.13 ND - 0.13
Barium mg/L 1 2 0.1 Average ND ND
Range ND - 8.2
Chromium (hexavalent) µg/L 10 0.02 0.1
Average ND
Range 0.6 - 0.9 0.3 - 0.4 0.26 - 2.0 ND - 0.78
Fluoride (e, h) mg/L 2.0 1 0.1 Average 0.7 0.3 0.4 0.22 Range ND - 20 ND - 5.9
Nitrate (as Nitrogen) (k, t) mg/L 0.4 Average 9.5 2.3
Range ND - 9.4 ND - 2.9
µg/L 6 1 1
Average 3.3 ND
SYNTHETIC ORGANIC CONTAMINANTS including Pesticides/PCBs Range ND - 0.02
1,2,3-Trichloropropane (1,2,3-
TCP)(k, s, t) µg/L 0.005 0.0007 0.005 Average ND

VOLATILE ORGANIC CONTAMINANTS
Tetrachloroethylene Range ND - 1
(PCE) µg/L 5 0.06 0.5 Average ND
Trichloroethylene Range ND - 1.1
(TCE) µg/L 5 1.7 0.5 Average ND
SECONDARY STANDARDS - Aesthetic Standards
Range ND - 110 ND - 230
Aluminum (i) µg/L 200 600 50 Max RAA ND 120
Range 41 - 67 110 - 210 16 - 120
Chloride mg/L 500 NA (2) Average 54 162 71
Range 1 - 2 ND - 3
Color units 15 NA (1) Average 2 ND
Corrosivity Range 12.2 - 12.3 12 - 13 10 - 12
(as Aggressiveness Index) AI NA NA NA Average 12.2 13 12 Range ND - 120
µg/L 500 NA (50) Average 36
Range ND - 580
Manganese (f, k) µg/L 50 NL=500 (5) Average 49
Range ND - 2 ND - 1
Odor Threshold Units 3 NA 1 Average ND ND
Specific µS/ Range 317 - 466 1,040 - 1,050 1,011 - 1,800 115 - 3,037 Conductance (k) cm 1,600 NA NA Average 392 1,040 1,374 655 Range 21 47 231 - 240 140-260 3.0 - 240
Sulfate mg/L 500 NA 0.5 Average 34 236 197 127
Total Dissolved Range 178 - 263 663 - 696 610 - 1,200 64 - 700 Solids (j, k, s) mg/L 1,000 NA (2) Average 220 680 872 408 Range 0.6 - 1.3 0.1 - 0.55 0.15 - 0.2
Turbidity NTU 5 NA 0.1 Average 0.9 0.18 0.17
ND ND
Soil runoff
Runoff/leaching from natural deposits; industrial wastes ND
108
3 ND
1 -
ND
Foaming Agents - Methylene
Blue Active Substances
(MBAS)
Discharges of oil drilling wastes and from metal refineries; erosion of natural deposits
Erosion of natural deposits; runoff from orchards; glass and electronics production wastes
Erosion of natural deposits; water additive that promotes strong teeth; discharge from fertilizer and aluminum
factories
Perchlorate is an inorganic chemical used in solid rocket propellant, fireworks, explosives, flares, matches, and a variety of industries. It usually gets into drinking water as a result of environmental contamination from historic
aerospace or other industrial operations that used or use, store, or dispose of perchlorate and its salts.

Erosion of natural deposits
ND
ND
ND
-
-
ND
ND
Runoff/leaching from natural deposits
10 (as N)
10 (as N)
Discharge from factories, dry cleaners, and auto shops
(metal degreaser)
Runoff/leaching from natural deposits; seawater influence ND
Naturally-occurring organic materials
ND
ND
Leaching from natural deposits
Substances that form ions when in water; seawater
influence
Runoff and leaching from fertilizer use; leaching from
septic tanks and sewage; erosion of natural deposits
Erosion of natural deposits
Erosion of natural deposits; transformation of naturally occurring trivalent chromium to hexavalent chromium by
natural processes and human activities such as
discharges from electroplating factories, leather tanneries, wood preservation, chemical synthesis, refractory
production, and textile manufacturing facilities.

Soil runoff
Major Sources in Drinking Water
Naturally present in the environment
Discharge from metal degreasing sites and other factories Municipal and industrial waste discharges
Naturally-occurring organic materials
City of Corona, Utilities Department
2024 Water Quality Report
Human and animal fecal waste
Water Source
Regulated in Distribution System
Naturally present in the environment Highest % of positive samples collected in any one month = 0% ND
--
--
Major Sources in Drinking Water
Naturally present in the environment
Human and animal fecal waste
Major Sources in Drinking Water
Soil runoff
--
-- -- Total number of positive samples collected in 2024 = 0 Highest % of positive samples collected in any one month = 0% --
ND
ND
ND

0.6 --
-- -- Total number of positive samples collected in 2024 = 0 ND
ND
5 ND
ND
2 0.13
ND
ND
ND
ND
ND
Perchlorate (k, s)
Elemental balance in water; affected by temperature, other factors
Erosion of natural deposits; residual from some surface water treatment processes
Discharge from industrial and agricultural chemical
factories; leaching from hazardous waste sites; used as cleaning and maintenance solvent, paint and varnish
remover, and cleaning and degreasing agent; byproduct
during the production of other compounds and pesticides. -
ND
ND
1

Perfluorobutane Sulfonic Range ND - 52 ND - 2.2
(PFBS) ng/L NL=500 NA 3 Average 20 ND
Perfluorohexane Sulfonic Range ND - 68
Acid (PFHxS) ng/L NL=3 NA 3 Average 22
Perfluorooctanoic Acid Range ND - 300 ND - 4.3
(PFOA) ng/L NL=5.1 0.007 4 Average 80 ND
Perfluorooctanesulfonate Range ND - 330 ND - 4.2
acid (PFOS) ng/L NL=6.5 1 4 Average 93 ND
UNREGULATED CONTAMINANTS WITH NO MCLs (g) Health Effects Range 0.29 - 3.4 0.11 - 0.41
Boron (p) mg/L NL=1 NA 0.1 Average 1.33 0.24
Range ND - 19 ND - 3.9
Vanadium µg/L NL=50 NA 3 Average 6.39 ND

OTHER PARAMETERS
State PHG State Range State Colorado Ground Treated
Chemical Units MCL (MCLG) DLR/ Average Project River Water Average [MRDL] [MRDLG] CCRDL(RL) Water Water System Water
Range 68 - 71 123 - 128 120 - 390 16 - 130
Alkalinity mg/L NA NA (1) Average 70 126 230 79
Range 120 - 390 14 - 130
Bicarbonate mg/L NA NA NA Average 230 78
Range 15 - 22 72 - 75 55 - 170 1.6 - 83
Calcium mg/L NA NA (0.1) Average 18 74 118 43
Range 68 - 99 291 - 296 200 - 590 5.5 - 320
mg/L NA NA (1) Average 84 294 419 171
Range 8.4 -11 28 - 29 15 - 45 0.37 - 30
Magnesium mg/L NA NA (0.01) Average 9.7 28 30 15
pH Range 8.7 - 8.8 8.1 - 8.2 7.7 - 8.0 7.4 - 10.2
pH Units NA NA NA Average 8.7 8.1 7.9 7.5
Range 1.9 - 3.1 1.9 - 14 ND - 6
Potassium mg/L NA NA (0.2) Average 2.5 5.4 3.3
Range 35 - 54 104 - 108 54 - 180 21 - 110
mg/L NA NA (1) Average 44 106 118 67
Key to Abbreviations
AI Aggressiveness Index
CCDLP Consumer Confidence Report Detection Level
CFU/mL Colony-Forming Units per Milliliter
DBP Disinfection Byproducts
DLR Detection Limits for Purposes of Reporting
LRAA Locational Running Annual Average
MBAS Methylene Blue Active Substances
mg/L Milligrams per liter or parts per million (ppm)
N Nitrogen
NA Not Applicable
ND Not Detected
ng/L Nanograms per liter or parts per trillion (ppt)
NL Notification Level
NTU Nephelometric Turbidity Units
pCi/L PicoCuries per liter
RAA Running Annual Average
TOC Total Organic Carbon
μg/L Micrograms per liter or parts per billion (ppb)
μS/cm microSiemen per centimeter; or micromho per centimeter (µmho/cm) Extended Abbreviations
ND
- -
ND
ND
ND
ND

0.13 ND ND

0.15 Perfluoroalkyl and Polyfluoroalkyl Substances (PFAS) with Notification Levels, Analyzed by EPA Methods 533 (s) ND
ND
Vanadium exposures resulted in developmental and
reproductive effects in rats.

Boron exposures resulted in decreased fetal weight
(developmental effects) in newborn rats.

Industrial chemical factory discharges; runoff/leaching from landfills; used in fire-retarding foams and various industrial processes
Sodium (r)
Hardness (q)

5.4 ND ND
Regulatory Action Level (AL): The concentration of a contaminant which, if exceeded, triggers treatment or other requirements that a water system must follow.

Treatment Technique (TT): A required process intended to reduce the level of a contaminant in drinking water.

Maximum Contaminant Level (MCL): The highest level of a contaminant that is allowed in drinking water. Primary MCLs are set as close to the PHGs (or MCLGs) as is economically and technologically feasible. Secondary MCLs are set to protect the odor, taste and appearance of drinking water.

Maximum Contaminant Level Goal (MCLG): The level of a contaminant in drinking water below which there is no known or expected risk to health. MCLGs are set by the U.S. Environmental Protection Agency.

Public Health Goal (PHG): The level of a contaminant in drinking water below which there is no known or expected risk to health. PHGs are set by the California Environmental Protection Agency.

Primary Drinking Water Standard (PDWS): MCLs and MRDLs for contaminants that affect health along with their monitoring and reporting requirements, and water treatment requirements.

Maximum Residual Disinfectant Level (MRDL): The highest level of a disinfectant allowed in drinking water. There is convincing evidence that addition of a disinfectant is necessary for control of microbial contaminants.

Maximum Residual Disinfectant Level Goal (MRDLG): The level of a drinking water disinfectant below which there is no known or expected risk to health. MRDLGs do not reflect the benefits of the use of disinfectants to control microbial contaminants. 2

Parameter Units
State
MCL
[MRDL]
PHG
(MCLG)
[MRDLG]
State
DLR
Range
Average/LRAA/RAA
Distribution
System Wide Health Effects Language
Range ND - 34
µg/L 80 NA 1 LRAA 29.3
Range ND - 11
Haloacetic Acids (HAA5)
(o) µg/L 60 NA 1 LRAA 9.7
Range ND - 19
µg/L 10 0.1 1 Max RAA 7.9
Range 1.21 - 2.8
mg/L NA Max RAA 2.0
Range 2.2 - 2.7
mg/L TT NA 0.3 Average 2.4
Control of DBP
precursors (TOC)
Various natural and manmade
sources
Total organic carbon (TOC) has no health effects. However, total organic carbon provides a medium for the formation of disinfection byproducts. These byproducts include trihalomethanes (THMs) and haloacetic acids (HAAs). Drinking water containing these byproducts in excess of the MCL may lead to adverse health effects, liver or kidney problems, or nervous system effects, and may lead to an increased risk of cancer. [4 as Cl2]
Byproduct of drinking water
disinfection
Some people who drink water containing haloacetic acids in excess of the MCL over many years may have an increased risk of getting cancer.

Bromate (Mills - WR-24
Conn.) (l)
Byproduct of drinking water
disinfection
Some people who drink water containing bromate in excess of the MCL over many years may have an increased risk of getting cancer.

Chloramines [4 as Cl2]
Drinking water disinfectant
added for treatment
Some people who use water containing chloramines well in excess of the MRDL could experience irritating effects to their eyes and nose. Some people who drink water containing chloramines well in excess of the MRDL could experience stomach discomfort or anemia.

Major Sources in Drinking
Water
DISINFECTION BYPRODUCTS, DISINFECTANT RESIDUALS, AND DISINFECTION BYPRODUCT PRECURSORS FEDERAL RULE (m) Total Trihalomethanes
(TTHMs) (n)
Byproduct of drinking water
disinfection
Some people who drink water containing trihalomethanes in excess of the MCL over many years may experience liver, kidney, or central nervous system problems, and may have an increased risk of getting cancer.
3 Page 553 of 3451
State PHG State Range
Parameter Units MCL (MCLG) DLR/ Average
[MRDL] [MRDLG] CCRDL(RL)
FEDERAL UNREGULATED CONTAMINANTS MONITORING RULE (UCMR 4) (u) Haloactic Acid (HAA) Group
Range ND-15.8
Average 5.9
Range ND-17.3
Average 6.1
Range ND-28
Average 10.2
Range ND-2600
Average 1925
Range ND-32
Average 15.3
Metals and Metalloids Group
Range ND-62
Average 2
State PHG State Range
Parameter Units MCL (MCLG) DLR/ Average
[MRDL] [MRDLG] CCRDL(RL)
FEDERAL UNREGULATED CONTAMINANTS MONITORING RULE (UCMR 5) (v) Lithium by ICP
Range ND-55.1
Average 16
EPA 533
Range ND-0.0076
Average ND
Range ND-0.0038
Average ND
Range ND-0.0033
Average ND
Range ND-0.0061
Average ND
NA
Distribution
System
HAA5 (o) µg/L NA NA NA
NA
HAA6Br (w) µg/L NA NA NA
HAA9 (x) µg/L NA NA
Distribution
System
Total Organic Carbon µg/L NA NA NA
Bromide µg/L NA NA
PFBA µg/L NA NA 0.005
Manganese µg/L NA NA NA
PFHxS µg/L NA NA 0.003
Lithium µg/L NA NA 9
PFPeA µg/L NA NA 0.003
PFHxA µg/L NA NA 0.003

Footnotes
(a) The turbidity level of the filtered water shall be less than or equal to 0.3 NTU in 95% of the measurements taken each month and shall not exceed 1 NTU at any time. Turbidity, a measure of the cloudiness of the water, is an indicator of treatment performance.

The averages and ranges of turbidity shown in the Secondary Standards were based on the treatment plant effluent. (b) Total coliform MCLs: No more than 5.0% of the monthly samples may be total coliform-positive. Compliance is based on the combined distribution system sampling from all the treatment plants. In 2024, 1591 samples were analyzed and there were no positive detections for total coliform. The MCL was not violated. (c) E. coli MCL: The occurrence of two consecutive total coliform-positive samples, one of which contains E. coli, constitutes an acute MCL violation. The MCL was not violated.
(d) Total coliform TT trigger, Level 1 assessments, and total coliform TT violations: More than 5.0% total coliform-positive samples in a month trigger Level 1 assessments. Failure to conduct assessments and correct findings within 30 days is a total coliform violation.

No triggers, Level 1 assessments, or violations occurred. (e) E. coli MCL and Level 2 TT triggers for assessments: Routine and repeat samples are total coliform-positive and either sample is E. coli-positive or system fails to collect all repeat samples following an E. coli-positive sample, or fails to test for E. coli when the repeat sample is total coliform-positive. No samples were E. coli-positive. No MCLs violations or no assessments occurred. (f) Results included in this section range from 2016-2024. (g) Unregulated contaminant monitoring helps the USEPA and the State Board determine where certain contaminants occur and whether the contaminants need to be regulated.
(h) City of Corona was in compliance with all provisions of the State's Fluoridation System Requirements. This is part of the City of Corona’s blending plan to reduce the levels of fluoride being delivered to the consumer's tap. Refer to the “Treated Average System Water” column for a more accurate representation of system water quality. (i) Aluminum has a secondary standard limit. In 2024 the secondary standard limit was exceeded at our Treatment Facility effluent.

The Maximum Running Annual Average (Max RAA) was 158 ug/L, no consumer action is necessary since secondary standards for aluminum are established only for aesthetic effects (water color). We are continually calibrating our aluminum base coagulant to achieve the non-mandatory secondary standard limit of 200 ug/L. (j) Total Dissolved Solids (TDS) is a measure of the total amount of all the materials that are dissolved in water. These minerals, both natural and anthropogenic (made by humans), are mainly inorganic solids, with a minor amount of organic material. (k) This constituent was detected at levels exceeding the MCL, results shown in bold. Please note that this water is blended with water from other sources to provide customers with the highest quality drinking water. (l) Reported from Mills Filtration Plant Metropolitan Water District (MWD). Mills MWD water is blended with other Corona water sources. Please note that this water is blended with water from other sources to provide customers with the highest quality drinking water.
(m) The City of Corona was in compliance with all provisions of the Stage 2 Disinfectants and Disinfection Byproducts Rules (D/DBP).

Compliance was based on the locational running annual average (LRAA). The average reported reflects the highest TTHM and HAA5 LRAAs for the year.
(n) Total Trihalomethanes is the sum of bromodichloromethane, bromoform, chloroform, and dibromochloromethane. (o) HAA5 is the sum of dichloroacetic acid, trichloroacetic acid, monobromoacetic acid, dibromoacetic acid, and monochloroacetic acid. (p) The sources that were detected for Boron are all directed to the Temescal Desalter for reverse osmosis treatment. The treated water is monitored at the effluent of the facility which is represented in the "Treated Average System Water" column. (q) Hardness is the sum of polyvalent cations present in the water, generally magnesium and calcium. The cations are usually naturally occurring.
(r) Sodium refers to the salt present in the water and is generally naturally occurring. (s) Fluoride, nitrate, perchlorate, TDS, 1,2,3-TCP, PFOA, PFOS, PFBS and PFHxS are a part of Corona's blending remediation plan to reduce the levels being delivered to the consumer's tap. Refer to the "Treated Average System Water" column for a more accurate representation of system water quality.
(t) 1,2,3-TCP was monitored quarterly in Corona's source and treated waters for the State's initial monitoring requirement and continues to be monitored per our Blending Plan requirements. (u) UCMR 4 sampling took place from 2018-2019. Minimum reporting levels are as stipulated in the Federal UCMR 4. Detected parameter results are included in the CCR.
(v) UCMR 5 sampling took place 2023-2024. Minimum reporting levels are as stipulated in the Federal UCMR 5. Detected parameter results are included in the CCR.
(w) HAA6Br: Bromochloroacetic acid, bromodichloroacetic acid, dibromoacetic acid, dibromochloroacetic acid, monobromoacetic acid, and tribromoacetic acid.
(x) HAA9: Bromochloroacetic acid, bromodichloroacetic acid, chlorodibromoacetic acid, dibromoacetic acid, dichloroacetic acid, monobromoacetic acid, monochloroacetic acid, tribromoacetic acid, and trichloroacetic acid.

Appendices
City of Corona
2025 Urban Water Management Plan
Appendix F – AWWA Water Audit Reports past 5 years

5 Name of Contact Person: All audit data are entered on the Reporting Worksheet Email Address: Value can be entered by user
Telephone | Ext.: 951 736-2265 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: 20/21 Financial Year
Start Date: 07/2020 Enter MM/YYYY numeric format
End Date: 06/2021 Enter MM/YYYY numeric format
Audit Preparation Date: 9/14/2021
Volume Reporting Units:

PWSID / Other ID:

If you have questions or comments regarding the software please contact us via email at: [email protected] 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.

Stacy Joyce
Acre-feet
Please begin by providing the following information The following guidance will help you complete the Audit California (CA)
AWWA Free Water Audit Software v5.0
City of CoronaThe following worksheets are available by clicking the buttons below or selecting the tabs along the bottom of the [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.

CA3310037US
Use of Option
(Radio) Buttons:

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
IndicatorsReview 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

Water Audit Report for:

Reporting Year:

All volumes to be entered as: ACRE-FEET PER YEAR
Master Meter and Supply Error Adjustments
WATER SUPPLIED Pcnt: Value:

Volume from own sources: 7 31,465.843 acre-ft/yr 8 acre-ft/yr Water imported: 7 1,320.554 acre-ft/yr 9 acre-ft/yr
Water exported: 7 447.552 acre-ft/yr 9 acre-ft/yr
Enter negative % or value for under-registration
WATER SUPPLIED: 32,338.845 acre-ft/yr Enter positive % or value for over-registration .

AUTHORIZED CONSUMPTION
Billed metered: 7 30,582.450 acre-ft/yr
Billed unmetered: n/a acre-ft/yr
Unbilled metered: 8 63.340 acre-ft/yr Pcnt: Value:

Unbilled unmetered: 404.236 acre-ft/yr 1.25% 24061 acre-ft/yr AUTHORIZED CONSUMPTION: 31,050.026 acre-ft/yr
WATER LOSSES (Water Supplied - Authorized Consumption) 1,288.819 acre-ft/yr Apparent Losses Pcnt: Value:

Unauthorized consumption: 80.847 acre-ft/yr 0.25% acre-ft/yr Customer metering inaccuracies: 5 625.424 acre-ft/yr 2.00% acre-ft/yr Systematic data handling errors: 76.456 acre-ft/yr 0.25% acre-ft/yr Apparent Losses: 782.728 acre-ft/yr
Real Losses (Current Annual Real Losses or CARL)
Real Losses = Water Losses - Apparent Losses: 506.092 acre-ft/yr WATER LOSSES: 1,288.819 acre-ft/yr

NON-REVENUE WATER
NON-REVENUE WATER: 1,756.395 acre-ft/yr
= Water Losses + Unbilled Metered + Unbilled Unmetered

SYSTEM DATA
Length of mains: 7 851.0 miles
Number of active AND inactive service connections: 7 45,092 Service connection density: 53 conn./mile main
Yes
Average length of customer service line: ft
Average operating pressure: 7 93.3 psi

COST DATA
Total annual cost of operating water system: 10 $48,508,297 $/Year Customer retail unit cost (applied to Apparent Losses): 10 $2.38 Variable production cost (applied to Real Losses): 5 $689.17 $/acre-ft WATER AUDIT DATA VALIDITY SCORE:

PRIORITY AREAS FOR ATTENTION:
1: Volume from own sources
2: Customer metering inaccuracies
3: Variable production cost (applied to Real Losses)
Based on the information provided, audit accuracy can be improved by addressing the following components:
$/100 cubic feet (ccf)
<----------- 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: 70 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 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
Default option selected for Unbilled unmetered - a grading of 5 is applied but not displayed 20/21 7/2020 - 6/2021
City of Corona (CA3310037)
?
?
?
?
?
? 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

Water Audit Report for: City of Corona (CA3310037)
Reporting Year:

System Attributes:

Apparent Losses: 782.728 acre-ft/yr
+ Real Losses: 506.092 acre-ft/yr
= Water Losses: 1,288.819 acre-ft/yr
Unavoidable Annual Real Losses (UARL): 1,188.01 acre-ft/yr Annual cost of Apparent Losses: $811,476
Annual cost of Real Losses: $348,783 Valued at Variable Production Cost Performance Indicators:

Non-revenue water as percent by volume of Water Supplied: 5.4% Non-revenue water as percent by cost of operating system: 3.1% Real Losses valued at Variable Production Cost Apparent Losses per service connection per day: 15.50 gallons/connection/day Real Losses per service connection per day: 10.02 gallons/connection/day Real Losses per length of main per day*: N/A
Real Losses per service connection per day per psi pressure: 0.11 gallons/connection/day/psi From Above, Real Losses = Current Annual Real Losses (CARL): 506.09 acre-feet/year

0.43 * This performance indicator applies for systems with a low service connection density of less than 32 service connections/mile of pipeline Infrastructure Leakage Index (ILI) [CARL/UARL]:
20/21 7/2020 - 6/2021
Return to Reporting Worksheet to change this assumpiton AWWA Free Water Audit Software:

System Attributes and Performance Indicators
*** YOUR WATER AUDIT DATA VALIDITY SCORE IS: 70 out of 100 *** ?
?
American Water Works Association.

Copyright © 2014, All Rights Reserved.

WAS v5.0
Financial:

Operational Efficiency:

AWWA Free Water Audit Software v5.0 Performance Indicators 1 Page 559 of 3451 Water Audit Report for:

Reporting Year: 20/21 7/2020 - 6/2021
Data Validity Score: 70
Water Exported Revenue Water
447.552 447.552
Billed Metered Consumption (water exported is removed) Revenue Water 30,582.450
Own Sources Authorized Consumption 30,582.450 Billed Unmetered Consumption 30,582.450

0.000
31,050.026 Unbilled Metered Consumption

63.340
31,465.843 467.576 Unbilled Unmetered Consumption
404.236
System Input Water Supplied Unauthorized Consumption 1,756.395 32,786.397 Apparent Losses 80.847
32,338.845 782.728 Customer Metering Inaccuracies
625.424
Systematic Data Handling Errors
Water Losses 76.456
Water Imported 1,288.819 Leakage on Transmission and/or Distribution Mains Real Losses Not broken down
1,320.554 506.092 Leakage and Overflows at Utility's Storage Tanks Not broken downLeakage on Service ConnectionsNot broken down AWWA Free Water Audit Software: Water Balance
Non-Revenue Water
(NRW)
Billed Authorized Consumption
Unbilled Authorized Consumption
(Adjusted for known
errors)
Billed Water Exported
City of Corona (CA3310037)
WAS v5.0
American Water Works Association.

Copyright © 2014, All Rights Reserved.

AWWA Free Water Audit Software v5.0 Water Balance Page 560 of 3451 1 Water Audit Report for:

Reporting Year: 20/21 Show me the VOLUME of Non-Revenue Water Data Validity Score: 70 Show me the COST of Non-Revenue Water AWWA Free Water Audit Software:

Dashboard
7/2020 - 6/2021
City of Corona (CA3310037)
0 100,000200,000300,000400,000500,000600,000700,000
Cost $
Total Cost of NRW =$1,482,498
Unbilled metered (valued at Var. Prod. Cost) Unbilled unmetered (valued at Var. Prod. Cost)Unauth. consumption Cust. metering inaccuraciesSyst. data handling errors Real Losses (valued at Var. Prod. Cost) WAS v5.0
American Water Works Association.

Copyright © 2014, All Rights Reserved.

Water ExportedAuthorized ConsumptionWater Losses
0%
10%20%30%40%50%60%70%80%90%
100%
Water ExportedWater ImportedVolume From Own Sources
Real Losses Apparent LossesUnbilled Auth. Cons. Billed Auth. Cons.Water Exported Non Revenue Water Revenue WaterWater Exported
The graphic below is a visual representation of the
Water Balance with bar heights propotional to the
volume of the audit components
Water Exported Water Supplied
AWWA Free Water Audit Software v5.0 Dashboard 1 Page 561 of 3451 5 Name of Contact Person: All audit data are entered on the Reporting Worksheet Email Address: Value can be entered by user
Telephone | Ext.: 951 736-2265 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: 2022 Financial Year
Start Date: 07/2021 Enter MM/YYYY numeric format
End Date: 06/2022 Enter MM/YYYY numeric format
Audit Preparation Date: 12/13/2022
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 CoronaThe following worksheets are available by clicking the buttons below or selecting the tabs along the bottom of the [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.

CA3310037US
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.

Stacy Joyce
Acre-feet
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
IndicatorsReview 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

Water Audit Report for:

Reporting Year:

All volumes to be entered as: ACRE-FEET PER YEAR
Master Meter and Supply Error Adjustments
WATER SUPPLIED Pcnt: Value:

Volume from own sources: 9 31,510.862 acre-ft/yr 8 acre-ft/yr Water imported: 9 358.079 acre-ft/yr 10 acre-ft/yr
Water exported: 9 391.650 acre-ft/yr 9 acre-ft/yr
Enter negative % or value for under-registration
WATER SUPPLIED: 31,477.291 acre-ft/yr Enter positive % or value for over-registration .

AUTHORIZED CONSUMPTION
Billed metered: 7 29,974.930 acre-ft/yr
Billed unmetered: n/a 0.000 acre-ft/yr
Unbilled metered: 8 83.857 acre-ft/yr Pcnt: Value:

Unbilled unmetered: 393.466 acre-ft/yr 1.25% 24061 acre-ft/yr AUTHORIZED CONSUMPTION: 30,452.253 acre-ft/yr
WATER LOSSES (Water Supplied - Authorized Consumption) 1,025.038 acre-ft/yr Apparent Losses Pcnt: Value:

Unauthorized consumption: 78.693 acre-ft/yr 0.25% acre-ft/yr Customer metering inaccuracies: 6 613.445 acre-ft/yr 2.00% acre-ft/yr Systematic data handling errors: 74.937 acre-ft/yr 0.25% acre-ft/yr Apparent Losses: 767.075 acre-ft/yr
Real Losses (Current Annual Real Losses or CARL)
Real Losses = Water Losses - Apparent Losses: 257.963 acre-ft/yr WATER LOSSES: 1,025.038 acre-ft/yr

NON-REVENUE WATER
NON-REVENUE WATER: 1,502.361 acre-ft/yr
= Water Losses + Unbilled Metered + Unbilled Unmetered

SYSTEM DATA
Length of mains: 9 851.0 miles
Number of active AND inactive service connections: 9 46,256 Service connection density: 54 conn./mile main
Yes
Average length of customer service line: ft
Average operating pressure: 9 93.3 psi

COST DATA
Total annual cost of operating water system: 10 $46,485,087 $/Year Customer retail unit cost (applied to Apparent Losses): 10 $2.60 Variable production cost (applied to Real Losses): 7 $729.77 $/acre-ft WATER AUDIT DATA VALIDITY SCORE:

PRIORITY AREAS FOR ATTENTION:
1: Volume from own sources
2: Billed metered
3: Customer metering inaccuracies
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
Default option selected for Unbilled unmetered - a grading of 5 is applied but not displayed 2022 7/2021 - 6/2022
City of Corona (CA3310037)
*** YOUR SCORE IS: 80 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 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:
$/100 cubic feet (ccf)
<----------- 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

Water Audit Report for: City of Corona (CA3310037)
Reporting Year:

System Attributes:

Apparent Losses: 767.075 acre-ft/yr
+ Real Losses: 257.963 acre-ft/yr
= Water Losses: 1,025.038 acre-ft/yr
Unavoidable Annual Real Losses (UARL): 1,206.26 acre-ft/yr Annual cost of Apparent Losses: $868,759
Annual cost of Real Losses: $188,253 Valued at Variable Production Cost Performance Indicators:

Non-revenue water as percent by volume of Water Supplied: 4.8% Non-revenue water as percent by cost of operating system: 3.0% Real Losses valued at Variable Production Cost Apparent Losses per service connection per day: 14.80 gallons/connection/day Real Losses per service connection per day: 4.98 gallons/connection/day Real Losses per length of main per day*: N/A
Real Losses per service connection per day per psi pressure: 0.05 gallons/connection/day/psi From Above, Real Losses = Current Annual Real Losses (CARL): 257.96 acre-feet/year

0.21 * This performance indicator applies for systems with a low service connection density of less than 32 service connections/mile of pipeline Infrastructure Leakage Index (ILI) [CARL/UARL]:
2022 7/2021 - 6/2022
Return to Reporting Worksheet to change this assumpiton AWWA Free Water Audit Software:

System Attributes and Performance Indicators
*** YOUR WATER AUDIT DATA VALIDITY SCORE IS: 80 out of 100 *** ?
?
American Water Works Association.

Copyright © 2014, All Rights Reserved.

WAS v5.0
Financial:

Operational Efficiency:

AWWA Free Water Audit Software v5.0 Performance Indicators 1 Page 564 of 3451 Water Audit Report for:

Reporting Year: 2022 7/2021 - 6/2022
Data Validity Score: 80
Water Exported Revenue Water
391.650 391.650
Billed Metered Consumption (water exported is removed) Revenue Water 29,974.930
Own Sources Authorized Consumption 29,974.930 Billed Unmetered Consumption 29,974.930

0.000
30,452.253 Unbilled Metered Consumption

83.857
31,510.862 477.323 Unbilled Unmetered Consumption
393.466
System Input Water Supplied Unauthorized Consumption 1,502.361 31,868.941 Apparent Losses 78.693
31,477.291 767.075 Customer Metering Inaccuracies
613.445
Systematic Data Handling Errors
Water Losses 74.937
Water Imported 1,025.038 Leakage on Transmission and/or Distribution Mains Real Losses Not broken down
358.079 257.963 Leakage and Overflows at Utility's Storage Tanks Not broken downLeakage on Service ConnectionsNot broken down AWWA Free Water Audit Software: Water Balance
Non-Revenue Water
(NRW)
Billed Authorized Consumption
Unbilled Authorized Consumption
(Adjusted for known
errors)
Billed Water Exported
City of Corona (CA3310037)
WAS v5.0
American Water Works Association.

Copyright © 2014, All Rights Reserved.

AWWA Free Water Audit Software v5.0 Water Balance Page 565 of 3451 1 Water Audit Report for:

Reporting Year: 2022 Show me the VOLUME of Non-Revenue Water Data Validity Score: 80 Show me the COST of Non-Revenue Water AWWA Free Water Audit Software:

Dashboard
7/2021 - 6/2022
City of Corona (CA3310037)
0 100,000200,000300,000400,000500,000600,000700,000800,000 Cost $
Total Cost of NRW =$1,405,348
Unbilled metered (valued at Var. Prod. Cost) Unbilled unmetered (valued at Var. Prod. Cost)Unauth. consumption Cust. metering inaccuraciesSyst. data handling errors Real Losses (valued at Var. Prod. Cost) WAS v5.0
American Water Works Association.

Copyright © 2014, All Rights Reserved.

Water ExportedAuthorized ConsumptionWater Losses
0%
10%20%30%40%50%60%70%80%90%
100%
Water ExportedWater ImportedVolume From Own Sources
Real Losses Apparent LossesUnbilled Auth. Cons. Billed Auth. Cons.Water Exported Water ExportedRevenue WaterNon Revenue Water
The graphic below is a visual representation of the
Water Balance with bar heights propotional to the
volume of the audit components
Water Exported Water Supplied
AWWA Free Water Audit Software v5.0 Dashboard 1 Page 566 of 3451

6.0_2021_02_11
Name of Utility: VOS Volume from Own Sources
Name of Contact Person: VOSEA VOS Error Adjustment
Email: WI Water Imported
Telephone | Ext.: WIEA WI Error Adjustment
City/Town/Municipality: WE Water Exported
State / Province: WEEA WE Error Adjustment
Other State/Province: BMAC Billed Metered Authorized Consumption Country: BUAC Billed Unmetered Authorized Consumption
Audit Preparation Date: UMAC Unbilled Metered Authorized Consumption Audit Year: UUAC Unbilled Unmetered Authorized Consumption Audit Year Label: (Fiscal, Calendar, etc) SDHE Systematic Data Handling Errors Audit Period Start Date: CMI Customer Metering Inaccuracies Audit Period End Date: UC Unauthorized Consumption
Volume Reporting Units: Lm Length of mains
Water System Structure: Nc Number of service connections Water Type: Lp Average length of (private) customer service line System ID Number: AOP Average Operating Pressure
Validator Name/ID: CRUC Customer Retail Unit Charge
Validator Email: VPC Variable Production Cost
Estimated Total Population Served by Water Utility:

Color Key User input Calculated Optional default
Guidance for the Guidance for the
or
AWWA Web Resources for Water Loss Control
https://www.awwa.org/Resources-Tools/Resource-Topics/Water-Loss-Control or Items referenced in the Free Water Audit Software v6.0 on the web:

Data Grading Matrix v6.0Example Water Audit v6.0Water Audit Compiler v6.0 AWWA Reports on Performance Indicators
M36 Manual
If you have questions or comments regarding this software please contact us at: [email protected] Answer questions about operational practices for each
audit input, and the data validity grades will automatically populate.Review NRW components, performance indicators and graphical outputs to evaluate the results of the audit. Enter notes to explain how values were calculated, document data sources, and related information about data management practices.

Interactive Data
Grading
951-736-2265CoronaUnited States
Acre-feet
Dec 13 2022California (CA)Jun 30 2023Jul 01 2022Fiscal2023 Enter the required data on this worksheet to calculate the water balance and data grading.

Water Balance
Loss Control
Planning
AWWA Free Water Audit Software v6.0
Enter Basic Information
Stacy [email protected]
Table of Contents (TOC)
The current sheet. Enter contact information and basic audit details.

Key of Input Acronyms In order of appearance in the Worksheet City of Corona
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. 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 targeting loss reduction levels. This tool contains several separate worksheets. Sheets can be accessed using the tabs at the bottom of the screen, or by clicking the TOC links below.

Start Page
Blank Sheet
Worksheet
Interactive Data Grading
After clicking an acronym button, answer all visible questions in the order they're presented, choosing best-fit answer
Dashboard
Notes
Acknowledgements for development of the AWWA Free
Water Audit Software v6.0.

Acknowledgements
By popular demand! A blank sheet. The world is your canvas.The values entered in the Worksheet automatically populate the Water Balance.Use this sheet to interpret the results of the audit validity score and performance indicators.Use this sheet to understand the terms used in the audit process.Diagrams depicting possible customer service connection line configurations.

Definitions
Service
Connection
Diagram
Choosing to enter unit of percent or volume
(applies to VOSEA, WIEA, WEEA, CMI)
Limiting
Choosing to enter default or custom input
(applies to UUAC, SDHE, UC)
choose entry option:

1.00% percent
7 Grade will populate when all visible questions are complete for an input The limiting criteria will be labeled along the right. If only 1 limiting criterion is shown, improving on that criterion will achieve a higher data grade. If multiple limiting criteria are shown, improving on each limiting criterion is necessary to achieve a higher data grade. A complete inventory of data grading criteria is available in the Data Grading Matrix v6.0 (see web resources)

0.25%
RetailPotable Water
custom 75.000volume 25.000
default
CA3310037Damian Martinez
Use acronym buttons in IDG header to navigate among inputs. Acronym Key above.

White = needs answers, orange = complete, clear = not required. Example below. 168,751
[email protected]
choose entry option:

Worksheet
American Water Works Association Copyright © 2020, All Rights Reserved.

FWAS v6.0
AWWA Free Water Audit Software v6.0 Start Page 1

Water Audit Report for:

Audit Year:

All volumes to be entered as: ACRE-FEET PER YEAR
WATER SUPPLIED choose entry option:

VOS Volume from Own Sources: n g 9 26,664.749 Acre-ft/Yr n g 10 0.00% percent acre-ft/yr under-registration VOSEA WI Water Imported: n g 9 855.539 Acre-ft/Yr n g 9 0.00% percent acre-ft/yr under-registration WIEA WE Water Exported: n g 9 356.903 Acre-ft/Yr n g 7 0.00% percent acre-ft/yr under-registration WEEA 27,163.385 Acre-ft/Yr
.

AUTHORIZED CONSUMPTION
BMAC Billed Metered: n g 8 26,087.000 Acre-ft/Yr
BUAC Billed Unmetered: n g n/a 0.000 Acre-ft/Yr
UMAC Unbilled Metered: n g 10 81.080 Acre-ft/Yr choose entry option:

UUAC Unbilled Unmetered: n g 3 65.218 Acre-ft/Yr 0.25% default acre-ft/yr 24061 Default option selected for Unbilled Unmetered, with automatic data grading of 3 26,233.298 Acre-ft/Yr
WATER LOSSES 930.088 Acre-ft/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 65.218 Acre-ft/Yr 0.25% default acre-ft/yr CMI Customer Metering Inaccuracies: n g 3 534.042 Acre-ft/Yr 2.00% percent acre-ft/yr under-registration UC Unauthorized Consumption: n g 3 65.218 Acre-ft/Yr 0.25% default acre-ft/yr Default option selected for Unauthorized Consumption, with automatic data grading of 3 664.477 Acre-ft/Yr
Real Losses
265.610 Acre-ft/Yr
930.088 Acre-ft/Yr

NON-REVENUE WATER
1,076.385 Acre-ft/Yr

SYSTEM DATA
Lm Length of mains: n g 10 813.0 miles (including fire hydrant lead lengths) Nc Number of service connections: n g 8 46,272 (active and inactive) Service connection density: 57 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 93.3 psi

COST DATA
CRUC Customer Retail Unit Charge: n g 10 $2.66
VPC Variable Production Cost: n g 8 $740.68 $/acre-ft $/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: Customer Metering Inaccuracies (CMI) Unit Total Losses: gal/conn/day 2: Billed Metered (BMAC) Unit Apparent Losses: gal/conn/day 3: Volume from Own Sources (VOS) Unit Real LossesA
: 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 Corona
Jul 01 2022 - Jun 30 2023
Water Supplied Error Adjustments
Fiscal2023
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. *** $/100 cubic feet (ccf)
$46,519,641
Total Annual Operating Cost
go to start page
NON-REVENUE WATER:

If entering an
Error Adjustment,
select under- or overregistration
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.

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

AWWA Free Water Audit Software v6.0 Worksheet 1

Water Balance Water Audit Report for:

Audit Year: 2023 Jul 01 2022 - Jun 30 2023
Data Validity Tier: Tier IV (71-90)
Water Exported
(WE)
(corrected for known
errors)
Revenue Water
(Exported)
356.903 356.903
Billed Metered Consumption (BMAC)
(water exported is removed) Revenue Water
26,087.000
26,087.000 Billed Unmetered Consumption (BUAC) 26,087.000

0.000
26,233.298 Unbilled Metered Consumption (UMAC)

81.080
26,664.749 146.298 Unbilled Unmetered Consumption (UUAC)

65.218
Water Supplied Systematic Data Handling Errors (SDHE) 1,076.385 27,520.288 Apparent Losses 65.218
27,163.385 664.477 Customer Metering Inaccuracies (CMI) 534.042
Unauthorized Consumption (UC)
Water Losses 65.218
930.088 Leakage on Transmission and/or Distribution Mains Real Losses Not broken down
855.539 265.610 Leakage and Overflows at Utility's Storage Tanks Not broken down
Leakage on Service Connections
Not broken down
Water Imported (WI)
(corrected for known
errors)
AWWA Free Water Audit Software
Non-Revenue Water
(NRW)
Billed Authorized Consumption
Unbilled Authorized Consumption
(corrected for known
errors)
City of Corona
Billed Water Exported
Volume from Own
Sources (VOS)
System Input
Volume
Authorized
Consumption
FWAS v6.0
American Water Works Association.

Copyright © 2020, All Rights Reserved.

AWWA Free Water Audit Software v6.0 Water Balance Page 569 of 3451 1 0 AWWA Free Water Audit Software: Dashboard
Water Audit Report for: City of Corona Audit Year: Fiscal Jul 01 2022 - Jun 30 2023 Actual KPI result Target (see Worksheet)
1 US$ = Local
Data Validity Score: Data Validity Tier: enter current conversion rate for local currency Tier II (26-50) Tier III (51-70)
Tier IV (71-90)
Tier I (≤25)
Tier V (91-100)
Total Loss Cost Rate Apparent Loss Cost Rate Real Loss Cost Rate $/conn/year $/conn/year $/conn/year
NRW Components Summary
Unit Total Losses Unit Apparent Losses Unit Real LossesA gal/conn/day gal/conn/day gal/conn/day
Average Operating Pressure
psi
Infrastructure Leakage Index (ILI) Unit Real LossesB
dimensionless gal/mile/day
See UARL definition for additional guidance on the ILI
Real Losses Unauthorized Consumption Acre-ft/Yr gal/conn/daySystematic Data Handling Errors Unbilled Unmetered Auth ConsCustomer Metering Inaccuracies Unbilled Metered Authorized Cons Apparent Losses
Real Losses
Unbilled Authorized Cons
Non-Revenue Water
0 2023
78 Tier IV (71-90)
Data Validity
gauge %iles per validated industry ranges2

0.737
Loss Control Planning for Tier DetailsSee
Key Performance Indicators
result is below
10th %ile

4.25 go to referencesgo to worksheet go to grading

20.88 17.9

16.62 12.8
(UARL) Unavoidable Annual Real Losses
result is below
10th %ile
1,185.0 22.9
VPC

0.2 292
result is below
10th %ile
result is below
10th %ile

5.1 93.3
CRUC
Basis of Valuation
Blended
146.3
1,076.4
$769,236$196,732$108,360
$1,074,327
664.5265.6 VPC
Volume Value
Acre-ft/Yr $/Yr
0 200400600800
1,0001,200
Volume (Acre-ft/Yr)
Total Volume of NRW = 1,075
Acre-ft/Yr
$0$200,000$400,000$600,000$800,000$1,000,000$1,200,000
Total Cost of NRW =
$1,074,327/Yr
10th %ile
25th %ile
Median
75th %ile
90th %ile
2 3 4
2 3 4
2 3 4
2 3 4
2 3 4
American Water Works Association.

Copyright © 2020, All Rights Reserved.

FWAS v6.0
2 3
4 2
3 4
Median
90th %ile90th %ile90th %ile
Median Median
Median
Median Median
Median Median
25th
%ile
25th
%ile
25th
%ile
25th
%ile 25th
%ile
25th
%ile
25th
%ile
25th
%ile
75 75 th %ile 75th %ile th %ile
75th %ile 75th %ile 75th %ile
75 75 th %ile th %ile
10th %ile10th %ile10th %ile
90 10th %ile 90 th %ile th %ile10th %ile
90th %ile90th %ile90th %ile 10th %ile10th %ile10th %ile Guidance Information for Key Performance Indicators
AWWA Free Water Audit Software v6.0 Dashboard 1 Page 570 of 3451 Table 1 Source: AWWA Water Loss Control Committee Report (2020)1, with naming conventions updated 2020 AWWA Water Audit Method – Water Audit Outputs and Key Performance Indicators: Uses and Limitations Type Indicator Description
Suitable Purposes
Uses and Limitations Principal Users Assessment Bench- Marking Target- Setting Planning Tracking Attribute Apparent Loss Volume Calculated by Free Water Audit Software   Assess loss level Utility, Regulators Apparent Loss Cost Calculated by Free Water Audit Software   Assess cost loss level Utility, Regulators Real Loss Volume Calculated by Free Water Audit Software   Assess loss level Utility, Regulators Real Loss Cost Calculated by Free Water Audit Software   Assess loss cost level Utility, Regulators Unavoidable Annual
Real Loss (UARL)
Calculated by Free Water Audit Software   Reveal theoretical technical low level of leakage
Utility, Regulators
Volume Unit Apparent Losses
(vol/conn/day)
Strong and understandable indicator for multiple users.      Used for performance
tracking and target-setting
Utility, Regulators
Unit Real LossesA(vol/conn/day)
Strong and understandable indicator for multiple users.      Used for performance
tracking and target-setting
Utility, Regulators, Policy Makers
Unit Real LossesB(vol/pipeline length/ day)
Strong and understandable indicator for use by utilities with low connection density.      Data collection and
assessment of systems with “low” connection density
Utility, Regulators, Policy Makers
Unit Total Losses (vol/conn/day) New KPI
Strong and understandable indicator, suitable for high-level performance measurement.   High level indicator for
trending analysis. Not appropriate for target-setting or benchmarking Utilities, Customers
Infrastructure Leakage Index (ILI)
Robust, specialized ratio KPI; can be influenced by pressure and connection density.    Benchmarking after pressure
management is implemented
Utilities
Value Apparent Loss Cost
Rate (value/conn/year) New KPI
Indicators with sufficient technical rigor. Provide the unit financial value of each type of loss, which is useful for planning and assessment of cost efficiency of water loss reduction and control interventions and programs.    Data collection and
assessment on AWWA indicators or contextual parameters to use in conjunction with Loss Cost Rates Utilities, Regulators, Customers
Real Loss Cost Rate (value/conn/year) New KPI
   Utilities,
Regulators, Customers
Validity Data Validity Tier
(DVT)
Strong indicator of water loss audit data quality, if data has been validated. Tier provides guidance on priority areas of activity.     Assess caliber of data inputs
of the water audit
Regulators, Utilities
AWWA Free Water Audit Software v6.0 Dashboard 2 Page 571 of 3451

6.0_2021_02_11
Name of Utility: VOS Volume from Own Sources
Name of Contact Person: VOSEA VOS Error Adjustment
Email: WI Water Imported
Telephone | Ext.: WIEA WI Error Adjustment
City/Town/Municipality: WE Water Exported
State / Province: WEEA WE Error Adjustment
Other State/Province: BMAC Billed Metered Authorized Consumption Country: BUAC Billed Unmetered Authorized Consumption
Audit Preparation Date: UMAC Unbilled Metered Authorized Consumption Audit Year: UUAC Unbilled Unmetered Authorized Consumption Audit Year Label: (Fiscal, Calendar, etc) SDHE Systematic Data Handling Errors Audit Period Start Date: CMI Customer Metering Inaccuracies Audit Period End Date: UC Unauthorized Consumption
Volume Reporting Units: Lm Length of mains
Water System Structure: Nc Number of service connections Water Type: Lp Average length of (private) customer service line System ID Number: AOP Average Operating Pressure
Validator Name/ID: CRUC Customer Retail Unit Charge
Validator Email: VPC Variable Production Cost
Estimated Total Population Served by Water Utility:

Color Key User input Calculated Optional default
Guidance for the Guidance for the
or
AWWA Web Resources for Water Loss Control
https://www.awwa.org/Resources-Tools/Resource-Topics/Water-Loss-Control or Items referenced in the Free Water Audit Software v6.0 on the web:

Data Grading Matrix v6.0Example Water Audit v6.0Water Audit Compiler v6.0 AWWA Reports on Performance Indicators
M36 Manual
If you have questions or comments regarding this software please contact us at: [email protected] RetailPotable Water
custom 75.000volume 25.000
default
CA3310037Damian Martinez
Use acronym buttons in IDG header to navigate among inputs. Acronym Key above.

White = needs answers, orange = complete, clear = not required. Example below. 169,245
[email protected]
choose entry option:

Worksheet
Limiting
Choosing to enter default or custom input
(applies to UUAC, SDHE, UC)
choose entry option:

1.00% percent
7 Grade will populate when all visible questions are complete for an input The limiting criteria will be labeled along the right. If only 1 limiting criterion is shown, improving on that criterion will achieve a higher data grade. If multiple limiting criteria are shown, improving on each limiting criterion is necessary to achieve a higher data grade. A complete inventory of data grading criteria is available in the Data Grading Matrix v6.0 (see web resources)

0.25%
Interactive Data Grading
After clicking an acronym button, answer all visible questions in the order they're presented, choosing best-fit answer
Dashboard
Notes
Acknowledgements for development of the AWWA Free
Water Audit Software v6.0.

Acknowledgements
By popular demand! A blank sheet. The world is your canvas.The values entered in the Worksheet automatically populate the Water Balance.Use this sheet to interpret the results of the audit validity score and performance indicators.Use this sheet to understand the terms used in the audit process.Diagrams depicting possible customer service connection line configurations.

Definitions
Service
Connection
Diagram
Choosing to enter unit of percent or volume
(applies to VOSEA, WIEA, WEEA, CMI)
Enter the required data on this worksheet to calculate the water balance and data grading.

Water Balance
Loss Control
Planning
AWWA Free Water Audit Software v6.0
Enter Basic Information
Stacy [email protected]
Table of Contents (TOC)
The current sheet. Enter contact information and basic audit details.

Key of Input Acronyms In order of appearance in the Worksheet City of Corona
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. 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 targeting loss reduction levels. This tool contains several separate worksheets. Sheets can be accessed using the tabs at the bottom of the screen, or by clicking the TOC links below.

Start Page
Blank Sheet
Worksheet
Answer questions about operational practices for each
audit input, and the data validity grades will automatically populate.Review NRW components, performance indicators and graphical outputs to evaluate the results of the audit. Enter notes to explain how values were calculated, document data sources, and related information about data management practices.

Interactive Data
Grading
951-736-2265CoronaUnited States
Acre-feet
Dec 10 2024California (CA)Jun 30 2024Jul 01 2023Fiscal2024 American Water Works Association Copyright © 2020, All Rights Reserved.

FWAS v6.0
AWWA Free Water Audit Software v6.0 Start Page 1