Agenda packet — Ontario City Council, June 2, 2026 (part 3 of 3)

Once an Assessor’s Parcel has been taxe d in any Fiscal Year as Developed Property, the Assessor’s Parcel shall conti nue to be taxed as Developed Property regardless of changes to or expiration of the original building permit, and regardless of revisions to or destruction of the structure that was, or was expected to be, constructed pursuant to the original building permit.

D. METHOD OF APPORTIONM ENT OF THE SPECIAL TAX

Each Fiscal Year, beginning with Fiscal Year 2026-27, the CFD Administrator shall determine the Special Tax Requirement for such Fiscal Year. The Special Tax shall then be levied as follows:

First: If needed to satisfy the Special Tax Requirement, the Special Tax shall be levied Proportionately on each Assessor’s Parcel of Developed Property up to 100% of the applicable Assigned Special Tax;

Second: If additional monies are needed to sati sfy the Special Tax Requirement after the first step has been complete d, then the Special Tax shall be levied Proportionately on each Assessor’s Parcel of Final Mapped Pr operty up to 100% of the Maximum Special Tax for Final Mapped Property;

507

City of Ontario CFD No. 77 12 February 18, 2026
Third: If additional monies are needed to sa tisfy the Special Tax Requirement after the first two steps have been completed, then th e Special Tax shall be levied Proportionately on each Assessor’s Parcel of Undeveloped Property up to 100% of the Maximum Special Tax for Undeveloped Property;

Fourth: If additional monies are needed to sati sfy the Special Tax Requirement after the first three steps have been completed, then the levy of the Special Tax on each Assessor’s Parcel of Developed Property whose Maximu m Special Tax is determined through the application of the Backup Special Tax sha ll be increased Proportionately from the Assigned Special Tax up to the Maximum Special Tax for each such Assessor’s Parcel;

Fifth: If additional monies are needed to satisfy the Special Tax Requirement after the first four steps have been completed, then the Special Tax shall be levied Proportionately on each Assessor’s Parcel of Taxable Prope rty Owner Association Property up to the Maximum Special Tax for Taxable Property Owner Association Property;

Sixth: If additional monies are needed to satisfy the Special Tax Requirement after the first five steps have been completed, then the Special Tax shall be levied Proportionately on each Assessor’s Parcel of Taxable Public Property up to the Maximum Special Tax for Taxable Public Property.

Notwithstanding the above, under no circumstances shall the Sp ecial Tax levied in any Fiscal Year on any Assessor’s Parcel of Single Family Property or Other Residential Property for which an occupancy permit for pr ivate residential use has been issued be increased as a result of delinquency or defa ult by the owner or owners of any other Assessor’s Parcel or Assessor’s Parcels w ithin CFD No. 77 by more than ten percent above the amount that would have been levied in that Fiscal Year had there never been any such delinquencies or defaults.

E. EXEMPTIONS

No Special Tax shall be levied on up to 11.17 Acres of Propert y Owner Association Property. Tax-exempt stat us will be assigned by the CFD Administrator in the chronological order in which property becomes Property Owner Association Property.

Property Owner Association Property or Public Property that is not exempt from the Special Tax under this section sh all be subject to the levy of the Special Tax and shall be taxed Proportionately as part of the fifth or sixth step, re spectively, in Section D above, up to 100% of the applicable Maximum Special Tax for Taxable Property Owner Association Property and Taxable Public Property. No Special Tax shall be levied in any Fiscal Year on Assessor’s Parcels that ha ve fully prepaid the Special Tax obligation pursuant to the formula set forth in Section H.

No Special Tax shall be levied on Lowe r Income Household Welfare Exemption Property; provided, however, that if, in any Fi scal Year, applicable law does not require that Lower Income Household Welfare Exem ption Property be exempt from some portion, or all, of the Special Ta x, such portion, or all, of th e Special Tax shall be levied 508

City of Ontario CFD No. 77 13 February 18, 2026
on such property in accordance with this Rate and Method of Apportionment based on the Land Use Class to which the Assessor’s Parcel is assigned.

F. APPEALS

Any property owner may file a written appe al of the Special Tax with CFD No. 77 claiming that the amount or application of th e Special Tax is not correct. The appeal must be filed not later than one calendar year after having paid the Special Tax that is disputed, and the appellant must be current in all payments of Special Taxes. In addition, during the term of the appeal pr ocess, all Special Taxes levied must be paid on or before the payment date established when the levy was made.

The appeal must specify the reasons why the appe llant claims the Special Tax is in error.

The CFD Administrator shall review the app eal, meet with the appellant if the CFD Administrator deems necessary, and advise the appellant of its determination.

If the property owner disagrees with the CFD Administrator’s decision relative to the appeal, the owner may then file a written a ppeal with the City Council whose subsequent decision shall be final and bindi ng on all interested parties. If the decision of the CFD Administrator or subsequent decision by the City Council re quires the Special Tax to be modified or changed in favor of the propert y owner, then the CFD Administrator shall determine if sufficient Special Tax revenue is available to make a cash refund. If a cash refund cannot be made, then an adjustment sh all be made to cred it future Special Tax levy(ies).

This procedure shall be exclusive and its exhaustion by any propert y owner shall be a condition precedent to filing any legal action by such owner.

G. MANNER OF COLLECTION

The Special Taxes shall be collected in the same manner and at the same time as ordinary ad valorem property taxes; provided, however, that the Special Taxes may be collected in such other manner as the City Council shall determine, including direct billing of affected property owners.

H. PREPAYMENT OF SPECIAL TAX

The following definitions apply to this Section H:

“CFD Public Facilities” means $12,843,000 for each Prepayment Period, or such lower number as determined by the C ity Council to be sufficien t to fund the Facilities and Services to be provided by CFD No. 77.

“Expenditures Fund” means funds or accounts, regardle ss of their names, that are established to hold moneys that are available to acquire or construct Facilities and to fund Services.
509

City of Ontario CFD No. 77 14 February 18, 2026

“Future Facilities Costs” means the CFD Public Faciliti es minus (i) Facilities and Services costs previously paid from the Expenditures Fund during the Prepayment Period in which the prepayment is being made, (ii) moneys currently on deposit in the Expenditures Fund from deposits made durin g the Prepayment Period in which the prepayment is being made, and (iii) moneys currently on depo sit in an escrow fund that are expected to be available to finance Facil ities costs. In no event shall the amount of Future Facilities Costs be less than zero.

“Prepayment Period” means one of three periods of time during which a Special Tax prepayment may be made.

“Prepayment Period 1” means July 1, 2026, through June 30, 2060.

“Prepayment Period 2” means July 1, 2060, through June 30, 2093.

“Prepayment Period 3” means July 1, 2093, through June 30, 2127.

1. Prepayment in Full

The obligation of an Assessor's Parcel to pay the Special Tax may be prepaid as described herein, provided that a prep ayment may be made only for Assessor’s Parcels for which a building permit for new construction was issued after January 1, 2025, and only if there are no delinquent Special Taxes with respect to such Assessor's Parcel at the time of prepayme nt. An owner of an Assessor's Parcel intending to prepay the Special Ta x obligation shall provide the CFD Administrator with written notice of intent to prepay. Within 30 days of receipt of such written notice, the CFD Administr ator shall notify such owner of the prepayment amount for such Assessor's Parcel. The CFD Administrator may charge a fee for providing this service. Prepayment in any six month period must be made not less than 45 days prior to the next occurring date that notice of redemption of Bonds from th e proceeds of such prepayme nt may be given to the Trustee pursuant to the Indenture.

The Special Tax Prepayment Amount (defined below) shall be calculated as summarized below (capitalized terms as defined below):

Bond Redemption Amount
plus Redemption Premium
plus Future Facilities Amount
plus Defeasance Amount
plus Administrative Fees and Expenses
less Reserve Fund Credit
Total Prepayment Amount

As of the proposed date of prepayme nt, the Special Tax Prepayment Amount (defined below) shall be calculated by the CFD Administrator as follows:

510

City of Ontario CFD No. 77 15 February 18, 2026
Paragraph No.

1. Confirm that no Special Tax delinquencies apply to such Assessor’s Parcel, and determine the Prepayment Period for the proposed prepayment.

2. Compute the Assigned Special Tax and Backup Special Tax for the Assessor’s Parcel to be prepaid based on the Deve loped Property Special Tax which is, or could be, charged in the current Fiscal Year. For Assessor’s Parcels of Final Mapped Property (for which a building permit has been issued but which is not yet classified as Developed Property) to be prepaid, compute the Assigned Special Tax and Backup Special Tax for that A ssessor’s Parcel as though it was already designated as Developed Property, ba sed upon the building permit which has already been issued for that Assessor’s Parcel.

3. (a) Divide the Assigned Special Tax computed pursu ant to Paragraph 2 by the total estimated Assigned Special Tax for CFD No. 77 based on the Developed Property Special Tax which could be char ged in the current Fiscal Year on all expected development through buildout of CFD No. 77, excluding any Assessor’s Parcels which have been prepaid, and

(b) Divide the Backup Special Tax com puted pursuant to Paragraph 2 by the estimated total Backup Special Tax at buildout of CFD No. 77, excluding any Assessor’s Parcels which have been prepaid.

4. Multiply the larger quotient computed pursuant to Paragraph 3(a) or 3(b) by the Outstanding Bonds to compute the amount of Outstanding Bonds to be retired and prepaid (the “Bond Redemption Amount”).

5. Multiply the Bond Redemption Amount co mputed pursuant to Paragraph 4 by the applicable redemption premium (e.g., the redemption price minus 100%), if any, on the Outstanding Bonds to be redeemed (the “Redemption Premium”).

6. Compute the Future Facilities Costs for the applicable Prepayment Period.

7. Multiply the larger quotient computed pursuant to Paragraph 3(a) or 3(b) by the amount determined pursuant to Paragra ph 6 to compute the amount of Future Facilities Costs to be prepaid (the “Future Facilities Amount”).

8. Compute the amount needed to pay in terest on the Bond Redemption Amount from the first bond interest and/or princi pal payment date fo llowing the current Fiscal Year until the earliest redemption date for the Outstanding Bonds.

9. Determine the Special Tax levied on the Assessor’s Parcel in the current Fiscal Year which has not yet been paid.

10. Add the amounts computed pursuant to Paragraphs 8 and 9 to determine the “Defeasance Amount”.
511

City of Ontario CFD No. 77 16 February 18, 2026

11. Verify the administrative f ees and expenses of CFD No. 77, including the costs to compute the prepayment, the costs to invest the prepayment proceeds, the costs to redeem Bonds, and the costs to record any notices to evidence the prepayment and the redemption (the “Administrative Fees and Expenses”).

12. If reserve funds for the Outstanding Bonds , if any, are at or above 100% of the reserve requirement (as defined in the Indenture) on the prepayment date, a reserve fund credit shall be calculated as a reduction in the applicable reserve fund for the Outstanding Bonds to be rede emed pursuant to the prepayment (the “Reserve Fund Credit”). No Reserve F und Credit shall be granted if reserve funds are below 100% of the reserve requi rement on the prepayment date or the redemption date.

13. The Special Tax prepayment is equal to the sum of the amounts computed pursuant to Paragraphs 4, 5, 7, 10, and 11, less the amount computed pursuant to Paragraph 12 (the “Prepayment Amount”).

14. From the Prepayment Amount , the amounts computed purs uant to Paragraphs 4, 5, 10, and 12 shall be deposited into the appropriate fund as established under the Indenture and be used to retire Outs tanding Bonds or make debt service payments. The amount computed pursuant to Paragraph 7 shall be deposited into the Expenditures Fund. The amount computed pursuant to Paragraph 11 shall be retained by CFD No. 77.

The Special Tax Prepayment Amount may be sufficient to redeem other than a $5,000 increment of Bonds. In such cases, the increment above $5,000, or integral multiple thereof, will be retained in the appropriate fund establis hed under the Indenture to be used with the next prepayment of Bonds or to make debt service payments.

As a result of the payment of the current Fiscal Year’s Sp ecial Tax levy as determined under Paragraph 9 (above), the CFD Administrator shall remove the current Fiscal Year’s Special Tax levy for such Assessor’s Parcel fro m the County tax rolls. With respect to any Assessor's Parcel that is prepaid during Prepayment Period 3, the CFD Administrator shall cause a suitable notice to be recorded in compliance with the Act to indicate that the Special Tax has been prepaid and that the oblig ation of such Assessor's Parcel to pay the Special Tax shall cease.

With respect to the Special Tax for any Assessor’s Parcel that is prepaid during Prepayment Period 1 or Prepayment Period 2, the obligation of such Assessor’s Parcel to pay the Special Tax shall be tolled, or susp ended, through the end of such Prepayment Period, but shall resume in the first Fiscal Year of the subs equent Prepayment Period.

The CFD Administrator shall cause a suitable notice to be recorded in compliance with the Act to indicate that the Special Tax has been satisfied for the remainder of the applicable Prepayment Period but has not b een permanently satisfied and the obligation to pay the Special Tax will resume in the fi rst Fiscal Year of the Prepayment Period following the Prepayment Period in whic h the prepayment was made. Once the 512

City of Ontario CFD No. 77 17 February 18, 2026
obligation of an Assessor’s Parcel to pay the Special Tax resumes, the Special Tax for the then applicable Prepayment Period may be prepaid.

Notwithstanding the foregoing, no Special Tax prepayment shall be allowed unless the amount of the Maximum Special Tax that may be levied on Taxable Property within CFD No. 77 (after excluding 11.17 Acre s of Property Owner Associat ion Property) both prior to and after the proposed prepayment is at least 1.1 times the maximum annual debt service on all Outstanding Bonds.

2. Prepayment in Part

The Special Tax on an Assessor’s Parcel for which a build ing permit for new construction was issued after January 1, 2025, ma y be partially prepaid. The amount of the prepayment shall be calculated as in S ection H.1, except that a partial prepayment shall be calculated by the CFD Administrator according to the following formula:

PP = (PF – AE) x % + AE.

The terms above have the following meaning:

PP = the partial prepayment
PF = the Prepayment Amount (full prepayment) for the Special Tax calculated according to Section H.1
AE = the Administrative Fees and Expenses determined pursuant to paragraph 11 above % = the percentage by which the owner of the Assessor’s Parcel(s) is partially prepaying the Special Tax

The Special Tax partial prepayment amount must be sufficient to redeem at least a $5,000 increment of Bonds.

The owner of any Assessor’s Parcel who desi res such prepayment shall notify the CFD Administrator of such owner’s intent to partially prepay the Special Tax and the percentage by which the Special Tax shall be prepaid. The CFD Administrator shall provide the owner with a statement of the am ount required for the partial prepayment of the Special Tax for an Assessor’s Parcel within thirty (30) days of the request and may charge a fee for providing this service. With respect to any Assessor’s Parcel that is partially prepaid, the CFD Administrator shal l (i) distribute the remitted prepayment funds according to Section H.1, and (ii) indica te in the records of CFD No. 77 that there has been a partial prepayment of the Special Tax and that a portion of the Special Tax with respect to such Assessor’s Parcel, equal to the outsta nding percentage (100% - “%”, as defined above) of the Maxi mum Special Tax, shal l continue to be levied on such Assessor’s Parcel pursuant to Section D du ring the Prepayment Period in which the partial prepayment is made.

For partial prepayments made during Prepayme nt Period 1 or Prepayment Period 2, the full amount of the Special Tax shall resume in the first Fiscal Year of the Prepayment Period following the Prepayment Period in which the partial prep ayment was made. 513

City of Ontario CFD No. 77 18 February 18, 2026
Once the obligation of an Assessor’s Parcel to pay the Special Tax resumes, the Special Tax for the then applicable Prepayment Period may be prepaid.

I. TERM OF SPECIAL TAX

The Fiscal Year after which no further Special Tax shall be levied or collected is Fiscal Year 2126-2127, except that the Special Tax that was lawfully levied in or before such Fiscal Year and that remains delinquent may be collected in subsequent years.

514

EXHIBIT A

CERTIFICATE

OF MODIFICATION OF SPECIAL TAX
(PAGE 1 OF 3)

CITY OF ONTARIO AND CFD NO. 77 CERTIFICATE

1. Pursuant to Section C.1 of the Rate and Me thod of Apportionment of Special Tax (the “Rate and Method”) for City of Ontario Co mmunity Facilities District No. 77 (The Resort at Ontario Ranch Facilities) (“CFD No. 77”), the Assigned Special Tax and the Backup Special Tax for Developed Property within CFD No. 77 has been modified.

a. The information in Table 1 below rela ting to the Assigned Special Tax for Developed Property within CF D No. 77, as stated in S ection C.1.a.2 of the Rate and Method of Apportionment, has been modified as follows:

TABLE 1
ASSIGNED SPECIAL TAX – DEVELOPED PROPERTY

Land
Use
Class

Description

Residential
Floor Area
(Square
Footage)

Assigned
Special Tax
1 Single Family Attached Prope rty < 1,201 $[ ] per Unit 2 Single Family Attached Property 1,201 – 1,300 $[ ] per Unit 3 Single Family Attached Property 1,301 – 1,400 $[ ] per Unit 4 Single Family Attached Property 1,401 – 1,500 $[ ] per Unit 5 Single Family Attached Property 1,501 – 1,600 $[ ] per Unit 6 Single Family Attached Property 1,601 – 1,700 $[ ] per Unit 7 Single Family Attached Property 1,701 – 1,800 $[ ] per Unit 8 Single Family Attached Property 1,801 – 1,900 $[ ] per Unit 9 Single Family Attached Property 1,901 – 2,000 $[ ] per Unit 10 Single Family Attached Property 2,001 – 2,100 $[ ] per Unit 11 Single Family Attached Property 2,101 – 2,200 $[ ] per Unit 12 Single Family Attached Property 2,201 – 2,300 $[ ] per Unit 13 Single Family Attached Property 2,301 – 2,400 $[ ] per Unit 14 Single Family Attached Property > 2,400 $[ ] per Unit 15 Single Family Detached Propert y < 1,401 $[ ] per Unit 16 Single Family Detached Property 1,401 – 1,600 $[ ] per Unit 515

b. The Backup Special Tax for Developed Pr operty, as stated in Section C.1.a.3, shall be modified as follows:

The Backup Special Tax shall be $[ ] per Unit of Single Family Attached Property and $[ ] per Unit of Single Family Detached Property. However, if the Expected Residential Lot Count for Single Family Attached Property does not equal 144 and for Single Family Detached Property does not equal 187, and the City has not issued Bonds, then the Backup Special Tax for Designated Buildable Lots of Single Family Attached Property and Single Family Detached Property shall be calculated according to the following formulas:

Attached = $[ ]  Expected Residential Lot
Count for Single Family Attached
Propert
y

Detached = $[ ]  Expected Residential Lot
Count for Single Family Detached
Property

2. The Special Tax for Developed Property may only be modified prior to the first issuance of CFD No. 77 Bonds.

3. Upon execution of this certificate by CFD No. 77, CFD No. 77 shall cause an amended notice of Special Tax lien for CFD No. 77 to be recorded reflecting the modifications set forth herein.

Land
Use
Class

Description

Residential
Floor Area
(Square
Footage)

Assigned
Special Tax
17 Single Family Detached Property 1,601 – 1,800 $[ ] per Unit 18 Single Family Detached Property 1,801 – 2,000 $[ ] per Unit 19 Single Family Detached Property 2,001 – 2,200 $[ ] per Unit 20 Single Family Detached Property 2,201 – 2,400 $[ ] per Unit 21 Single Family Detached Property > 2,400 $[ ] per Unit 22 Other Residential Property $[ ] per Acre
23 Non-Residential Property $[ ] per Acre
516

EXHIBIT A

CERTIFICATE

OF MODIFICATION OF SPECIAL TAX
(PAGE 3 OF 3)

Capitalized undefined terms used herein have the mean ings ascribed thereto in the Rate and Method. The modifications set forth in this Certificate have been calculated by the CFD Administrator in accordance with the Rate and Method.

GOODWIN CONSULTING GROUP, INC.

CFD ADMINISTRATOR

By:_________________________________ Date:______________________

The undersigned acknowledges receipt of this Certificate and of the modification of the Assigned Special Tax and Backup Special Tax for Developed Property as set forth in this Certificate.

CITY OF ONTARIO
COMMUNITY FACILITIES DISTRICT NO. 77
(THE RESORT AT ONTARIO RANCH FACILITIES)

By:_________________________________ Date:______________________

517
RESOLUTION NO. _____

A RESOLUTION OF THE CITY COUNCIL OF THE CITY OF ONTARIO,

CALIFORNIA, DEEMING IT NECESSARY FOR CIT Y OF ONTARIO
COMMUNITY FACILITIES DISTRICT NO. 77 (THE RESORT AT
ONTARIO RANCH FACILITIES) TO INCUR BONDED INDEBTEDNESS.

WHEREAS, on April 7, 2026 , the City Council (the “City Council”) of the City of Ontario (the “City”), pursuant to the Mello-Roos Community Facilities Act of 1982 (the “Act”), adopted a resolution entitled “ A Resolution of the City Council of the City of Ontario, California, of Intention to Establish a Community Facilities District Proposed to be Named City of Ontario Community Facilities District No. 77 (The Resort at Ontario Ranch Facilities) and to Authorize the Levy of a Special Tax Therein,” stating its intention to establish City of Ontario Community Facilities District No. 77 (The Resort at Ontario Ranch Facilities) (the “Community Facilities District”) and to authorize the Community Facilities District to levy a special tax (the “Special Tax”) within the Community Facilities District for the purpose of financing certain public facilities (the “Facilities”) and services; and

WHEREAS, on April 7, 2026, the City Council also adopted a resolution entitled “A Resolution of the City Council of the City of Ontario, California, Declaring it Necessary for City of Ontario Community Facilities District No. 77 (The Resort at Ontario Ranch Facilities) to Incur Bonded Indebtedness ” (the “ Resolution Declaring Necessity ”), declaring it necessary for the Community Facilities District to incur bonded indebtedness and setting the date for a public hearing to be held on the proposed debt authorization; and

WHEREAS, pursuant to the Resolution Declaring Necessity, City Council fixed Tuesday, May 19, 2026, at 6:30 p.m., or as soon thereafter as the City Council may reach the matter, as the time when the City Council will conduct the public hearing on the proposed debt authorization for the Community Facilities District; and

WHEREAS, the May 19, 2026 City Council meeting was cancelled and reconvened on the next regular date and the public hearing on the proposed debt authorization for the Community Facilities District has been continued to this meeting, as the next regular City Council meeting; and

WHEREAS, pursuant to the Resolution Declaring Necessity, notice of said public hearing on this date was timely published in the Inland Valley Daily Bulletin, a newspaper of general circulation published in the area of the Community Facilities District, in accordance with the Act; and

WHEREAS, on this date, the City Council opened, conducted and closed said public hearing; and

WHEREAS, at said public hearing, any person interested, including persons owning property within the area and desiring to appear and present any matters material to the questions set forth in the Resolution Declaring Necessity appeared and presented such matters; and

518
WHEREAS, oral or written protests against the proposed debt issue were not made or filed at or before said public hearing by 50% or more of the registered voters, or six registered voters, whichever is more, residing within the territory propo sed to be included in the Community Facilities District, or the owners of one-half or more of the area of land in the territory proposed to be included in the Community Facilities District and not exempt from the Special Tax; and

WHEREAS, the City Council deems it necessary for the Community Facilities District to incur bonded indebtedness; and

WHEREAS, on this date, the City Council adopted a Resolution entitled “A Resolution of the City Council of the City of Ontario, California, of Formation of City of Ontario Community Facilities District No. 77 (The Resort at Ontario Ranch Facilities ), Proposing that the Community Facilities District Be Authorized to Levy a Special Tax and Proposing that an Appropriations Limit of the Community Facilities District Be Established;” and

WHEREAS, the City Clerk of the City (the “City Clerk”) is the election official that will conduct the special election on the proposition to authorize the Community Facilities District to incur bonded indebtedness; and

WHEREAS, there has been filed with the City Clerk a letter from the Registrar of Voters of the County of San Bernardino indicating that no persons were registered to vote within the territory of the Community Facilities District as of April 14, 2026 , which demonstrates that 12 or more persons have not been registered to vote within the territory of the Community Facilities District for each of the 90 days preceding the close of said public hearing; and

WHEREAS, there has been filed with the City Clerk consents and waivers of all of the landowners of record in the Community Facilities District consenting to the waiver of, and waiving, any time limit specified by Section 53326 of the Act and any requirement pertaining to the conduct of said special election, including any time limit or requirement applicable to an election pursuant to Article 5 of the Act (commencing with Section 53345 of the Act), consenting to the holding of said special election on June 2 , 2026 , and consenting to the waiver of, and waiving, any impartial analysis, arguments or rebuttals, as set forth in Sections 53326 and 53327 of the Act; and

WHEREAS, the City Clerk has concurred in said waivers and has concurred in holding said special election on June 2, 2026;

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

SECTION 1. The foregoing recitals are true and correct , and the City Council so finds and determines.

SECTION 2. The City Council deems it necessary for the Community Facilities District to incur the bonded indebtedness.

519
SECTION 3. The bonded indebtedness will be incurred for the purpose of financing the costs of the Facilities, including all costs and estimated costs incidental to, or connected with, the accomplishment of said purpose, including, but not limited to, such costs and estimated costs as are described in Section 53345.3 of the Act.

SECTION 4. In accordance with the previous determination of the City Council, the whole of the Community Facilities District will pay for the bonded indebtedness.

SECTION 5. The maximum amount of debt to be incurred is $45,000,000.

SECTION 6. The maximum term the bonds to be issued shall run before maturity is 40 years.

SECTION 7. The maximum annual rate of interest to be paid shall not exceed the maximum interest rate permitted by applicab le law at the time of sale of the bonds, payable semiannually or at such times as the City Council or its designee shall determine, the actual rate or rates and times of payment of such interest to be determined by the City Council or its designee at the time or times of sale of the bonds.

SECTION 8. The proposition to authorize the Community Facilities District to incur the bonded indebtedness shall be submitted to the qualified electors of the Community Facilities District.

SECTION 9. The City Council hereby finds and determines that no persons were registered to vote within the territory of the Community Facilities District as of April 14, 2026, and that 12 or more persons have not been registered to vote within the territory of the Community Facilities District for each of the 90 days preceding the close of the public hearing held by the City Council on the proposed debt issue for the Community Facilities District. Accordingly, pursuant to Section 53326 of the Act, the vote shall be by the landowners of the Community Facilities District and each person who is the owner of land as of the close of said public hearing, or the authorized representat ive thereof, shall have one vote for each acre or portion of an acre that he or she owns within the Community Facilities District not exempt from the Special Tax.

SECTION 10. The City Council hereby finds and determines that the qualified electors of the Community Facilities District have (a) unanimously consented to the waiver of, and have waived, any time limit specified by Section 53326 of the Act and any requirement pertaining to the conduct of said election, including any time limit or requirement applicable to an election pursuant to Article 5 of the Act (commencing with Section 53345 of the Act), (b) unanimously consented to the holding of said election on June 2, 2026, and (c) unanimously consented to the waiver of, and have waived, any impartial analysis, a rguments or rebuttals, as set forth in Sections 53326 and 53327 of the Act. The City Council hereby finds and determines that the City Clerk has concurred in said waivers and has concurred in holding said election on June 2, 2026.

SECTION 11. The date of the special community facilities district election (which shall be consolidated with the special district election to authorize the Community Facilities District to levy the Special Tax) at which time the proposition to authorize the Community Facilities District to incur the bonded indebtedness shall be submitted to the voters is June 2, 2026.
520

SECTION 12. As authorized by Section 53353.5 of the Act, the propositions to authorize the Community Facilities District to incur such bonded indebtedness, to authorize the Community Facilities to levy the Special Tax and to establish an appropriations limit of the Community Facilities District shall be combined into one ballot proposition.

SECTION 13. Pursuant to Section 53326 of the Act, the election shall be conducted by mail or hand-delivered ballot. The voted ballots are required to be received in the office of the City Clerk no later than 6:30 p.m. on June 2, 2026; provided, however, that if all of the qualified electors have voted prior to such time, the election may be closed with the concurrence of the City Clerk.

SECTION 14. All actions heretofore taken by the officers, employees and agents of the City with respect to the incurrence of bonded indebtedness by the Community Facilities District, or in connection with or related to any of the matters referred to herein, are hereby approved, confirmed and ratified.

SECTION 15. The off icers, employees and agents of the City are hereby authorized and directed to take all actions and do all things that they, or any of them, may deem necessary or desirable to accomplish the purposes of this Resolution and not inconsistent with the provisions hereof.

SECTION 16. This Resolution shall take effect immediately upon its adoption.

The City Clerk of the City of Ontario shall certify as to the adoption of this Resolution.

PASSED, APPROVED, AND ADOPTED this 2nd day of June 2026.

_____________________________________
PAUL S. LEON, MAYOR

ATTEST:

____________________________________

SHEILA MAUTZ, CITY CLERK

APPROVED AS TO FORM:

____________________________________

BEST BEST & KRIEGER LLP

CITY ATTORNEY
521

STATE OF CALIFORNIA )

COUNTY OF SAN BERNARDINO )

CITY OF ONTARIO )

I, SHEILA MAUTZ, City Clerk of the City of Ontario, DO HEREBY CERTIFY that foregoing Resolution No. 2026- was duly passed and adopted by the City Council of the City of Ontario at their regular meeting held June 2, 2026 by the following roll call vote, to wit:

AYES: COUNCIL MEMBERS:

NOES: COUNCIL MEMBERS:

ABSENT: COUNCIL MEMBERS:

____________________________________

SHEILA MAUTZ, CITY CLERK

(SEAL)

The foregoing is the original of Resolution No. 2026- duly passed and adopted by the Ontario City Council at their regular meeting held June 2, 2026.

_____________________________________

SHEILA MAUTZ, CITY CLERK

(SEAL)

522
RESOLUTION NO. _____

A RESOLUTION OF THE CITY COUNCIL OF THE CITY OF ONTARIO,

CALIFORNIA, CALLING SPECIAL ELECTION FOR CITY OF ONTARIO COMMUNITY FACILITIES DISTRICT NO. 77 (THE RESORT AT
ONTARIO RANCH FACILITIES).

WHEREAS, on this date, the City Council (the “City Council”) of the City of Ontario (the “City”), pursuant to the Mello -Roos Community Facilities Act of 1982 (the “Act”), adopted a resolution entitled “ A Resolution of the Ci ty Council of the City of Ontario, California, of Formation of City of Ontario Community Facilities District No. 77 (The Resort at Ontario Ranch Facilities ), Proposing that the Community Facilities District be Authorized to Levy a Special Tax and Proposing that an Appropriations Limit of the Community Facilities District Be Established” (the “Resolution of Formation”), establishing City of Ontario Community Facilities District No. 77 (The Resort at Ontario Ranch Facilities) (the “Community Facilities District”), proposing that the Community Facilities District be authorized to levy a special tax (the “Special Tax”) within the Community Facilities District for the purpose of financing certain public facilities (the “Facilitie s”) and services and proposing that an appropriations limit of the Community Facilities District be established at $45,000,000; and

WHEREAS, on this date, the City Council also adopted a resolution entitled “ A Resolution of the City Council of the City of Ontario, California, Deeming it Necessary for City of Ontario Community Facilities District No. 77 (The Resort at Ontario Ranch Facilities) to Incur Bonded Indebtedness” (the “Resolution Deeming Necessity”), deeming it necessary for the Community Facilit ies District to incur bonded indebtedness in a maximum amount of $45,000,000; and

WHEREAS, pursuant to the provisions of the Act and said resolutions, the propositions to authorize the Community Facilities District to incur such bonded indebtedness, to authorize the Community Facilities District to levy the Special Tax and to establish such appropriations limit of the Community Facilities District are to be submitted to the qualified electors of the Community Facilities District at a special election; and

WHEREAS, the City Council desires to designate the City Clerk of the City (the “City Clerk”) as the election official for such special election; and

WHEREAS, there has been filed with the City Clerk a letter from the Registrar of Voters of the County of San Bernardino indicating that no persons were registered to vote within the territory of the Community Facilities District as of April 14, 2026 , which demonstrates that 12 or more persons have not been registered to vote within the territory of the Commu nity Facilities District for each of the 90 days preceding the close of the public hearings on the establishment of the Community Facilities District and the proposed debt issue for the Community Facilities District; and

523
WHEREAS, there has been filed with the City Clerk consents and waivers of all of the landowners of record in the Community Facilities District consenting to the waiver of, and waiving, any time limit specified by Section 53326 of the Act and any requirement pertaining to the conduct of said special election, including any time limit or requirement applicable to an election pursuant to Article 5 of the Act (commencing with Section 53345 of the Act), consenting to the holding of said special election on June 2 , 2026 and consenting to the waiver of, and waiving, any impartial analysis, arguments or rebuttals, as set forth in Sections 53326 and 53327 of the Act; and

WHEREAS, the City Clerk has concurred in said waivers and has concurred in holding said special election on June 2, 2026;

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

SECTION 1. The foregoing recitals are true and correct , and the City Council so finds and determines.

SECTION 2. Pursuant to Sections 53351, 53326 and 53325.7 of the Act, the propositions to authorize the Community Facilities District to incur bonded indebtedness, to authorize the Community Facilities District to levy the Special Tax and to establish the appropriations limit of the Community Facilities District shall be submitted to the qualified electors of the Community Facilities District at an election called therefor as provided below.

SECTION 3. The City Clerk is hereby designated as the official to conduct said election.

SECTION 4. As authorized by Section 53353.5 of the Act, the propo sitions to authorize the Community Facilities District to incur such bonded indebtedness, to authorize the Community Facilities District to levy the Special Tax and to establish such appropriations limit of the Community Facilities District shall be combined into one ballot proposition.

SECTION 5. The City Council hereby finds and determines that no persons were registered to vote within the territory of the Community Facilities District as of April 14, 2026, and that 12 or more persons have not been registered to vote within the territory of the Community Facilities District for each of the 90 days preceding the close of the public hearings heretofore held by the City Council on the establishment of the Community Facilities District and the proposed debt issue for the Community Facilities District. Accordingly, pursuant to Section 53326 of the Act, the vote shall be by the landowners of the Community Facilities District and each person who is the owner of land as of the close of said public hearings, or the authorized representative thereof, shall have one vote for each acre or portion of an acre that he or she owns within the Community Facilities District not exempt from the Special Tax.

524
SECTION 6. The City Council hereby finds and determines that the qualified electors of the Community Facilities District have (a) unanimously consented to the waiver of, and have waived, any time limit specified by Section 53326 of the Act and any requirement pertaining to the conduct of said election, including any time limit or requirement applicable to an election pursuant to Article 5 of the Act (commencing with Section 53345 of the Act), (b) unanimously consented to the holding of said election on June 2, 2026, and (c) unanimously consented to the waiver of, and have waived, any impartial analysis, arguments or rebuttals, as set forth in Sections 53326 and 53327 of the Act. The City Council hereby finds and determines that the City Clerk has concurred in said waivers and has concurred in holding said election on June 2, 2026.

SECTION 7. The City Council hereby calls a special election to submit to the qualified electors of the Community Facilities District the combined ballot proposition to authorize the Community Facilities District to incur bonded indebtedness in a maximum amount of $45,000,000, to authorize the Community Facilities to levy the Special Tax and to establish the appropriations limit of the Community Facilities District at $45,000,000, which election shall be held at 303 East B Street, Ontario, California, on June 2, 2026.

The City Council has caused to be provided to the City Clerk, as the official to conduct the election, the Resolution of Formation, the Resolution Deeming Necessity, a certified map of sufficient scale and clarity to show the boundaries of the Community Fa cilities District and a sufficient description to allow the City Clerk to determine the boundaries of the Community Facilities District.

The voted ballots shall be returned to the City Clerk not later than 6:30 p.m. on June 2, 2026; provided, however, tha t if all of the qualified electors have voted prior to such time, the election may be closed with the concurrence of the City Clerk.

SECTION 8. Pursuant to Section 53326 of the Act, the election shall be conducted by mail or hand -delivered ballot pursuant to Sect ion 4000 et. seq. of the California Elections Code. Except as otherwise provided in the Act, the provisions of law regulating elections of the City, insofar as they may be applicable, shall govern the election.

SECTION 9. The form of the ballot for the election, which sets forth the measure to be submitted to the voters, is attached hereto as Exhibit A and by this reference incorporated herein, and such form of ballot is hereby approved. The City Clerk shall cause to be del ivered to each of the qualified electors of the Community Facilities District a ballot in said form, together with all supplies and written instructions necessary for the use and return of the ballot. The number of votes to be voted by a particular landowner shall be specified on the ballot provided to that landowner.

The identification envelope for return of a ballot shall be enclosed with such ballot, shall have the return postage prepaid, and shall contain: (a) the name and address of the landowner, (b) a declaration, under penalty of perjury, stating that the voter is the owner of record or the authorized representative of the landowner entitled to vote and is the person whose name appears on the identification envelope, (c) the printed name and signature of the voter, (d) the date of signing and place of execution of the declaration described in clause (b) above, and (e) a notice that the envelope contains an official ballot and is to be opened only by the canvassing board.
525

Analysis and arguments with respect to the measure submitted to the voters are hereby waived, as provided in Section 53327 of the Act.

SECTION 10. The City Clerk shall accept the ballots of the qualified electors in the office of the City Clerk at 303 East B Street, Ontario, California, to and including 6:30 p.m. on June 2, 2026, whether said ballots be personally delivered or received by mail.

The City Clerk shall have available ballots that may be marked at said location on the election day by said qualified electors.

SECTION 11. The City Council h ereby determines that the Facilities and services financed by the Community Facilities District are necessary to meet increased demands placed upon local agencies as a result of development occurring in the Community Facilities District.

SECTION 12. The specific purpose of the bonded indebtedness that the Community Facilities District is proposed to be authorized to incur is the financing of the Facilities, including all costs and estimated costs incidental to, or connected with, the accomplishment of such purpose, and the proceeds of such bonded indebtedness shall be applied only to such specific purpose.

Upon approval of the proposition to authorize the Community Facilities District to incur bonded indebtedness, and the sale of any bonds evidencing such indebtedness, the City Council shall take such action as may be necessary to cause to be established an account for deposit of the proceeds of sale of the bonds. For so long as any proceeds of the bonds remain unexpended, the Executive Director of Finance of the City shall cause to be filed with the City Council, no later than January 1 of each year, a report stating (a) the amount of bond proceeds received and expended during the preceding year, and (b) the status of any project funded or to be funded from bond proceeds. Said report may relate to the calendar year, fiscal year, or other appropriate annual pe riod, as the Executive Director of Finance of the City shall determine, and may be incorporated into the annual budget, audit, or other appropriate routine report to the City Council.

SECTION 13. All actions heretofore taken by the officers, employees and agents of the City with respect to the special election called pursuant hereto , or in connection with or related to any of the matters referred to herein, are hereby approved, confirmed and ratified.

SECTION 14. The officers, employees and agents of the City are hereb y authorized and directed to take all actions and do all things that they, or any of them, may deem necessary or desirable to accomplish the purposes of this Resolution and not inconsistent with the provisions hereof.

SECTION 15. This Resolution shall take effect immediately upon its adoption.

The City Clerk of the City of Ontario shall certify as to the adoption of this Resolution.

526
PASSED, APPROVED, AND ADOPTED this 2nd day of June 2026.

_____________________________________
PAUL S. LEON, MAYOR

ATTEST:

____________________________________

SHEILA MAUTZ, CITY CLERK

APPROVED AS TO FORM:

____________________________________

BEST BEST & KRIEGER LLP

CITY ATTORNEY

527

STATE OF CALIFORNIA )

COUNTY OF SAN BERNARDINO )

CITY OF ONTARIO )

AYES: COUNCIL MEMBERS:

NOES: COUNCIL MEMBERS:

ABSENT: COUNCIL MEMBERS:

____________________________________

SHEILA MAUTZ, CITY CLERK

(SEAL)

The foregoing is the original of Resolution No. 2026- duly passed and adopted by the Ontario City Council at their regular meeting held June 2, 2026.

_____________________________________

SHEILA MAUTZ, CITY CLERK

(SEAL)

528

EXHIBIT A

OFFICIAL BALLOT

CITY OF ONTARIO
June 2, 2026

SPECIAL ELECTION
This ballot is for a special, landowner election. The number of votes to be voted pursuant to this ballot is ____.

INSTRUCTIONS TO VOTERS:

To vote on the measure, mark a cross (+ or X) in the voting square after the word “YES” or after the word “NO”. All distinguishing marks or erasures are forbidden and make the ballot void. If you wrongly mark, tear or deface this ballot, return it to the City Clerk of the City of Ontario and obtain another.

CITY OF ONTARIO
COMMUNITY FACILITIES DISTRICT NO. 77
(THE RESORT AT ONTARIO RANCH FACILITIES)

MEASURE: Shall the measure to authorize City of
Ontario Community Facilities District No. 77 (The Resort at Ontario Ranch Facilities) (the “Community Facilities District”) to incur bonded indebtedness in a maximum amount of
$45,000,000, to authorize the Community Facilities District to levy a special tax in order to finance certain facilities and services and to establish the annual appropriations limit of the Community Facilities District at $45,000,000, as specified in the resolutions adopted by the City Council of the City of Ontario on June 2, 2026 entitled “ A Resolution of the City Council of the City of Ontario, California, of Form ation of City of Ontario Community Facilities District No. 77 (The Resort at Ontario Ranch Facilities), Proposing that the Community Facilities District Be Authorized to Levy a Special Tax and Proposing that an Appropriations Limit of the Community Facilities District Be Established ” and “ A Resolution of the City Council of the City of Ontario, California, Deeming it Necessary for City of Ontario Community Facilities District No. 77 (The Resort at Ontario Ranch Facilities ) to Incur Bonded Indebtedness,” be adopted?

Yes:

No:

529
RESOLUTION NO. _____

A RESOLUTION OF THE CITY COUNCIL OF THE CITY OF ONTARIO,

CALIFORNIA, DECLARING RESULTS OF SPECIAL ELECTION AND
DIRECTING RECORDING OF NOTICE OF SPECIAL TAX LIEN.

WHEREAS, on June 2, 2026, the City Council (the “City Council”) of the City of Ontario (the “City”), pursuant to the Mello -Roos Community Facilities Act of 1982 (the “Act”), adopted a resolution entitled “A Resolution of the City Council of the City of Ontario, California, Calling Special Election for City of Ontario Community Facilities District No. 77 (The Resort at Ontario Ranch Facilities )” (the “Resolution Calling Election”), calling a special election to submit to the qualified electors of City of Ontario Community Facilities District No. 77 (The Resort at Ontario Ranch Facilities ) (the “Community Facilities District”) the combined ballot proposition to authorize the Community Facilities District to incur bonded indebtedness, to authorize the Community Facilities District to levy a special tax and to establish the appropriations limit of the Community Facilities District; and

WHEREAS, pursuant to the terms of the Resolution Calling Election and the provisions of the Act, the special election was held on June 2, 2026; and

WHEREAS, the City Clerk of the City (the “City Clerk”) has certified the canvass of the returns of the election and has filed a Canvass and Statement of Results of Election (the “Canvass”), a copy of which is attached hereto as Exhibit A;

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

SECTION 1. The foregoing recitals are true an d correct, and the City Council so finds and determines.

SECTION 2. The City Council has received, reviewed and hereby accepts the Canvass.

SECTION 3. The City Council hereby finds and declares that the ballot proposition submitted to the qualified electors of the Community Facilities District pursuant to the Resolution Calling Election has been passed and approved by such electors in accordance with Section 53355, Section 53328 and Section 53325.7 of the Act.

SECTION 4. The City Clerk is hereby directed to execute and caus e to be recorded in the office of the County Recorder of the County of San Bernardino a notice of special tax lien in the form required by the Act, said recording to occur no later than 15 days following adoption by the City Council of this Resolution.

SECTION 5. All actions heretofore taken by the officers, employees and agents of the City with respect to the special election, or in connection with or related to any of the matters referred to herein, are hereby approved, confirmed and ratified.

530
SECTION 6. The officers, employees and agents of the City are hereby authorized and directed to take all actions and do all things that they, or any of them, may deem necessary or desirable to accomplish the purposes of this Resolution and not inconsistent with the provisions hereof.

SECTION 7. This Resolution shall take effect immediately upon its adoption.

The City Clerk of the City of Ontario shall certify as to the adoption of this Resolution.

PASSED, APPROVED, AND ADOPTED this 2nd day of June 2026.

_____________________________________
PAUL S. LEON, MAYOR

ATTEST:

____________________________________

SHEILA MAUTZ, CITY CLERK

APPROVED AS TO FORM:

____________________________________

BEST BEST & KRIEGER LLP

CITY ATTORNEY

531

STATE OF CALIFORNIA )

COUNTY OF SAN BERNARDINO )

CITY OF ONTARIO )

AYES: COUNCIL MEMBERS:

NOES: COUNCIL MEMBERS:

ABSENT: COUNCIL MEMBERS:

____________________________________

SHEILA MAUTZ, CITY CLERK

(SEAL)

The foregoing is the original of Resolution No. 2026- duly passed and adopted by the Ontario City Council at their regular meeting held June 2, 2026.

_____________________________________

SHEILA MAUTZ, CITY CLERK

(SEAL)

532
4132-4177-6230.1

EXHIBIT A

CITY OF ONTARIO
COMMUNITY FACILITIES DISTRICT NO. 77
(THE RESORT AT ONTARIO RANCH FACILITIES)

CANVASS AND STATEMENT OF RESULTS OF ELECTION
I hereby certify that on June 2, 2026, I canvassed the returns of the special election for City of Ontario Community Facilities District No. 77 (The Resort at Ontario Ranch Facilities) held on June 2, 2026, that the total number of ballots cast in said Community Facilities District and the total number of votes cast for and against the combined ballot proposition submitted to the qualified electors of the Community Facilities District are as follows and that the totals as shown for and against such proposition are true and correct:

Qualified
Landowner
Votes

Votes
Cast

YES

City of Ontario Community Facilities
District No. 77 (The Resort at Ontario
Ranch Facilities) Special Election,
June 2, 2026

19 ___

___

MEASURE: Shall the measure to authorize City of Ontario Community Facilities District No. 77 (The Resort at Ontario Ranch Facilities ) (the “Community Facilities District”) to incur bonded indebtedness in a maximum amount of $45,000,000, to authorize the Community Facilities District to levy a special tax in order to finance certain facilities and services and to establish the annual appropriations limit of the Community Facilities District at $45,000,000, as specified in the resolutions adopted by the City Council of the City of Ontario on June 2, 2026 entitled “A Resolution of the City Council of the City of Ontario, California, of Formation of City of Ontario Community Facilities District No. 77 (The Resort at Ontario Ranch Facilities ), Proposing that the Community Facilities District Be Authorized to Levy a Special Tax and Proposing that an Appropriations Limit of the Community Facilities District Be Established” and “A Resolution of the City Council of the City of Ontario, California, Deeming it Necessary for City of Ontario Community Facilities District No. 77 (The Resort at Ontario Ranch Facilities) to Incur Bonded Indebtedness,” be adopted?
IN WITNESS WHEREOF, I HAVE HEREUNTO SET MY HAND this 2nd day of June, 2026.

BY:

SHEILA MAUTZ, CITY CLERK
533
ORDINANCE NO. _____

AN ORDINANCE OF THE CITY COUNCIL OF THE CITY OF ONTARIO,

CALIFORNIA, LEVYING A SPECIAL TAX WITHIN CITY OF ONTARIO COMMUNITY FACILITIES DISTRICT NO. 77 (THE RESORT AT
ONTARIO RANCH FACILITIES).

WHEREAS, on April 7, 2026 , the City Council (the “City Council”) of the City of Ontario (the “City”), pursuant to the Mello -Roos Community Facilities Act of 1982 (the “Act”), adopted a resolution entitled “A Resolution of the City Council of the City of Ontario, California, of Intention to Establish a Community Facilities District Proposed to be Named City of Ontario Community Facilities District No. 77 (The Resort at Ontario Ranch Facilities) and to Authori ze the Levy of a Special Tax Therein ,” stating its intention to establish City of Ontario Community Facilities District No. 77 (The Resort at Ontario Ranch Facilities ) (the “Community Facilities District”) and to authorize the Community Facilities District to levy a special tax (the “Special Tax”) within the Community Facilities District for the purpose of financing certain public facilities (the “Facilities”) and services (the “Services”); and

WHEREAS, on June 2, 2026, the City Council held a noticed public hearing on the establishment of the Community Facilities District, as required by the Act; and

WHEREAS, subsequent to the close of said hearing, the City Council adopted resolutions entitled “A Resolution of the City Council of the City of Ontario, California, of Formation of City of Ontario Community Facilities District No. 77 (The Resort at Ontario Ranch Facilities), Proposing that the Community Facilities District be Authorized to Levy a Special Tax and Proposing that an Appropriations Limit of the Community Facilities District be Established” (the “Resolution of Formation”), “A Resolution of the City Council of the City of Ontario, California, Deeming it Necessary for City of Ontario Communi ty Facilities District No. 77 (The Resort at Ontario Ranch Facilities ) to Incur Bonded Indebtedness” and “A Resolution of the City Council of the City of Ontario, California, Calling Special Election for City of Ontario Community Facilities District No. 77 (The Resort at Ontario Ranch Facilities ),” which resolutions established the Community Facilities District, proposed that the Community Facilities District be authorized to levy the Special Tax within the Community Facilities District, proposed that an appropriations limit of the Community Facilities District be established and called a special election to submit to the qualified electors of the Community Facilities District the combined ballot proposition to authorize the Community Facilities District to incur bonded indebtedness, to authorize the Community Facilities District to levy the Special Tax and to establish the appropriations limit of the Community Facilities District; and

WHEREAS, on June 2, 2026, an election was held in which the qualified electors of the Community Facilities District approved said proposition by more than the two-thirds vote required by the Act; and

WHEREAS, the City Council is the legislative body of the Community Facilities District;
534
THE CITY COUNCIL OF THE CITY OF ONTARIO DOES ORDAIN AS FOLLOWS:

SECTION 1. The City Council hereby authorizes and levies the Special Tax within the Community Facilities District pursuant to Sections 53328 and 53340 of the Act, at the rate and in accordance with t he method of apportionment set forth in Exhibit B to the Resolution of Formation (the “Rate and Method”). The Special Tax is hereby levied commencing in fiscal year 2026-27 and in each fiscal year thereafter until the last fiscal year in which the Special Tax is authorized to be levied pursuant to the Rate and Method.

SECTION 2. The City Council may, pursuant to subdivision (b) of Section 53340 of the Act, provide, by resolution, for the levy of the Special Tax in the current tax year or in future tax year s at the same rate or at a lower rate than the rate provided by this Ordinance. In no event shall the Special Tax be levied on any parcel within the Community Facilities District in excess of the maximum tax specified therefor in the Rate and Method.

SECTION 3. The Special Tax shall be levied on all of the parcels in the Community Facilities District, unless exempted by law or by the Rate and Method.

SECTION 4. The proceeds of the Special Tax shall only be used to pay, in whole or in part, the cost of providing the Facilities and Services and incidental expenses pursuant to the Act.

SECTION 5. The Special Tax shall be collected in the same manner as ordinary ad valorem property taxes are collected and shall be subject to the same penalties and the same procedure, sale and lien priority in the case of delinquency as is provided for ad valorem taxes or in such other manner as the City Council shall determine, including direct billing of the affected property owners.

SECTION 6. If for any reason any portion of this Ordinance is found to be invalid, or if the Special Tax is found inapplicable to any particular parcel within the Community Facilities District by a court of competent jurisdiction, the balance of this Ordinance and the application of the Special Tax to the remaining parcels within the Community Facilities District shall not be affected.

SECTION 7. The Mayor shall sign this Ordinance and the City Clerk shall certify as to the adoption and shall cause a summary thereof to be published at least once, in a newspaper of general circulation in the City of Ontario, California within fifteen (15) days of the adoption. The City Clerk shall post a certified copy of this Ordinance, including the vote for and against the same, in the Office of the City Clerk, in accordance with Government Code Section 36933.

PASSED, APPROVED, AND ADOPTED this ______ day of _______ 2026.

_____________________________________
PAUL S. LEON, MAYOR
535

ATTEST:

_________________________________

SHEILA MAUTZ, CITY CLERK

APPROVED AS TO FORM:

_______________________________

BEST BEST & KRIEGER LLP

CITY ATTORNEY

536

STATE OF CALIFORNIA )

COUNTY OF SAN BERNARDINO )

CITY OF ONTARIO )

I, SHEILA MAUTZ, City Clerk of the City of Ontario, DO HEREBY CERTIFY that foregoing Ordinance No. _______ was duly introduced at a regular meeting of the City Council of the City of Ontario held June 2, 2026 and adopted at the regular meeting held ___________, 2026 by the following roll call vote, to wit:

AYES: COUNCIL MEMBERS:

NOES: COUNCIL MEMBERS:

ABSENT: COUNCIL MEMBERS:

_________________________________

SHEILA MAUTZ, CITY CLERK

(SEAL)

I hereby certify that the foregoing is the original of Ordinance No. _______ duly passed and adopted by the Ontario City Council at their regular meeting held ____________ and that Summaries of the Ordinance were published on ___________ and _____________, in the Inland Valley Daily Bulletin newspaper.

__________________________________

SHEILA MAUTZ, CITY CLERK

(SEAL)

537

RESOLUTION NO. ________

A RESOLUTION OF THE CITY COUNCIL OF THE CITY OF ONTARIO,

CALIFORNIA, AUTHORIZING THE EXECUTION AND DELIVERY OF AN

ACQUISITION AND FUND ING AGREEMENT WITH SL ONTARIO

DEVELOPMENT COMPANY, LLC

WHEREAS, certain real property within th e boundaries of the City of Ontario (the “City”) located generally south of State Route 60 is commonly referred to as Ontario Ranch; and

WHEREAS, the City has approved a General Plan Amendment for the New Model Colony (the name by which Ontario Ranch was formerly known), which has been supplemented by certain water, recycled water and sewer master plans (as so supplemented, the “General Plan Amendment”) and has certified an Environmental Impact Report and adopted a Mitigated Negative Declaration in connect ion with the General Plan Amendment (together, the “Environmental Impact Report”); and

WHEREAS, the City has specified in the General Plan Amendment and the Environmental Impact Report the major backbone transportation, water, sewer, storm drainage, park s, public safety infrastructure and fiber optic systems required to serve Ontario Ranch; and

WHEREAS, SL Ontario Development Company, LLC (“SLODC”), is developing certain of the property within Ontario Ranch (the “Property”); and

WHEREAS, certain of suc h major backbone infrastructure is required to serve the Property; and

WHEREAS, in order to provide a mechanism to fund, in a timely manner, the costs of certain of such major backbone infrastructure required to serve Ontario Ranch (the “Facilities”) so t hat such development may occur , the City has, pursuant to the provisions of the Mello -Roos Community Facilities Act of 1982 (the “Act”), established City of Ontario Community Facilities District No. 77 (The Resort at Ontario Ranch Facilities) (the “Community Facilities District”), the boundaries of which include the Property; and

WHEREAS, pursuant to the Act, the proceedings of the City Council of the City and an election held within the Community Facilities District, the Community Facilities District is authorized to levy a special tax (the “Special Tax”) within the Community Facilities District and issue special tax bonds (the “Bonds”) secured by the Special Tax in order to finance certain of the Facilities; and

WHEREAS, it is anticipated that the Special Tax will be levied by the Community Facilities District and that, from time to time, Bonds will be issued by the Community Facilities District; and
538

WHEREAS, SLODC proposes to construct, or cause to be constructed, certain of the Facilities proposed to be financed by the Community Facilities District pursuant to the Act, and the City proposes to purchase such Facilities from SLODC pursuant to an Acquisition and Funding Agreement by and between the City and SLODC (such Acquisition and Funding Agreement, in the form presented to this meeting, with such changes, insertions and omissions as are made pursuant to this Resolution, being referred to herein as the “Acquisition Agreement”); and

WHEREAS, the City Council is the legislative body of the Community Facil ities District;

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

SECTION 1. The Acquisition Agreement , in substantially the form submitted to this meeting and made a part hereof as though set forth herein, be and the same is hereby approved. Each of the Mayor of the City, and such other member of the City Council as the Mayor may designate, the City Manager of the City and the Executive Director of Finance of the City, and such other officer or employee of the City as the City Manager may designate (the “Authorized Officers”) is hereby authorized, and any one of the Authorized Officers is hereby directed, for and in the name of the City, to execute and deliver the Acquisition Agreement in the form submitted to this meeting, with such changes, insertions and omissions as the Authorized Officer executing the same may require or approve, such requirement or approval to be conclusively evidenced by the execution of the Acquisition Agreement by such Authorized Officer.

SECTION 2. All actions heretofore taken by the officers, employees and agents of the City with respect to the Acquisition Agreement, or in connection with or related to any of the matters referred to herein, are hereby approved, confirmed and ratified.

SECTION 3. The officers, employees and agents of the City are hereby authorized and directed to take all actions and do all things that they, or any of them, may deem necessary or desirable to accomplish the purposes of this Resolution and not inconsistent with the provisions hereof.

SECTION 4. This Resolution shall take effect immediately upon its adoption.

The City Clerk of the City of Ontario shall certify as to the adoption of this Resolution.

PASSED, APPROVED, AND ADOPTED this 2nd day of June 2026.

_____________________________________
PAUL S. LEON, MAYOR

539

ATTEST:

____________________________________

SHEILA MAUTZ, CITY CLERK

APPROVED AS TO FORM:

____________________________________

BEST BEST & KRIEGER LLP

CITY ATTORNEY

540

STATE OF CALIFORNIA )

COUNTY OF SAN BERNARDINO )

CITY OF ONTARIO )

AYES: COUNCIL MEMBERS:

NOES: COUNCIL MEMBERS:

ABSENT: COUNCIL MEMBERS:

____________________________________

SHEILA MAUTZ, CITY CLERK

(SEAL)

The foregoing is the original of Resolution No. 2026- duly passed and adopted by the Ontario City Council at their regular meeting held June 2, 2026.

_____________________________________

SHEILA MAUTZ, CITY CLERK

(SEAL)

541
RESOLUTION NO. ______

A RESOLUTION OF THE CITY COUNCIL OF THE CITY OF ONTARIO,

CALIFORNIA, MAKING A DECLARATION OF OFFICIAL INTENT TO

REIMBURSE EXPENDITURES FOR COSTS OF FACILITIES WITH BOND PROCEEDS AND RELATED ACTIONS.

WHEREAS, the City Council (the “City Council”) of the City of Ontario (the “City”) has formed City of Ontario Community Facilities Dis trict No. 77 (The Resort at Ontario Ranch Facilities) (the “Community Facilities District”) under the provisions of the Mello - Roos Community Facilities Act of 1982 (the “Act”); and

WHEREAS, the Community Facilities District is authorized under the Act to levy a special tax (the “Special Tax”) to pay for the costs of certain public facilities (the “Facilities”) and to issue bonds payable from the Special Tax; and

WHEREAS, in order to provide funds to finance certain of the Facilities, the Community Facilities District proposes to issue its City of Ontario Community Facilities District No. 77 (The Resort at Ontario Ranch Facilities) Special Tax Bonds (the “Bonds”); and

WHEREAS, pursuant to the Act (a) the Community Facilities District is a legally constituted governmental entity established pursuant to the Act for the sole purpose of financing facilities and services, and (b) the City Council is the legislative body of the Community Facilities District; and

WHEREAS, the Community Facilities District and the City are related entities; and

WHEREAS, beginning on the 60-day period prior to the date hereof, the City has paid or incurred, or expects to pay or incur prior to the issuance of the Bonds, certain costs of the Facilities; and

WHEREAS, the City has also paid or incurred certain “preliminary expenditures” with respect to the Facilities and may pay or incur certain additional “preliminary expenditures” with respect to the Facilities; the term “preliminary expenditures” includes architectural, engineering, surveying, soil testing, bond issuance, and similar costs that are incurred prior to commencement of acquisition, construction, or rehabilitation of a project, other than land acquisition, site preparation, and similar costs incident to commencement of construction and such preliminary expenditures constitute costs of the Facilities; and

WHEREAS, in order to reimburse the City for the payment of costs of the Facilities, the Community Facilities District anticipates it will issue Bonds in an amount not expected to exceed $45,000,000 for the purpose of financing costs of the Facilities; and

WHEREAS, proceeds of the Bonds will be allocated to reimbursement of prior expenditures no later than 18 months after the later of (a) the date the cost is paid, or (b) the date the Facilities are, or each component thereof is, placed in service or abandoned (but in no event more than three years after the cost is paid); and 542

WHEREAS, Section 1.150-2 of the Treasury Regulations requires the Community Facilities District to declare its reasonable official intent to reimburse prior expenditures for costs of the Facilities with proceeds of indebtedness; and

WHEREAS, the Community Facilities District desires to declare its official intent to use proceeds of indebtedness, including the Bonds, to reimburse expenditures for costs of the Facilities paid before such indebtedness is incurred and to finance the costs of the Facilities on a long-term basis with the proceeds of such indebtedness;

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

SECTION 1. The foregoing recitals are true and correct, and the City Council so finds and determines.

SECTION 2. This Resolution is adopted by the City Council, as the legislative body of the Community Facilities District, solely for purposes of establishing compliance with the requirements of Section 1.150 -2 of the Treasury Regulations. Capitalized undefined terms used herein shall have the meanings ascribed thereto in the Internal Revenue Code of 1986 and i n Section 1.150 -2 of the Treasury Regulations. This Resolution does not bind the Community Facilities District or the City to make any expenditure, incur any indebtedness, or proceed with construction of the Facilities.

SECTION 3. All actions heretofore taken by the officers, employees and agents of the City with respect to the actions set forth above are hereby approved, confirmed and ratified.

SECTION 4. The officers, employees and agents of the City are, and each of them is, hereby authorized and directed, for and in the name of the Community Facilities District to take all actions and do any and all things and to execute and deliver any and all agreements, documents, certificates or instruments that they, or any of them, may deem necessary or advisable in order to con summate the transactions contemplated by this Resolution and otherwise to carry out, give effect to and comply with the terms and intent of this Resolution not inconsistent with the provisions hereof.

SECTION 5. This Resolution shall take effect immediately upon its adoption.

The City Clerk of the City of Ontario shall certify as to the adoption of this Resolution.

PASSED, APPROVED, AND ADOPTED this 2nd day of June 2026.

_____________________________________
PAUL S. LEON, MAYOR
543

ATTEST:

____________________________________

SHEILA MAUTZ, CITY CLERK

APPROVED AS TO FORM:

____________________________________

BEST BEST & KRIEGER LLP

CITY ATTORNEY

544

STATE OF CALIFORNIA )

COUNTY OF SAN BERNARDINO )

CITY OF ONTARIO )

AYES: COUNCIL MEMBERS:

NOES: COUNCIL MEMBERS:

ABSENT: COUNCIL MEMBERS:

____________________________________

SHEILA MAUTZ, CITY CLERK

(SEAL)

The foregoing is the original of Resolution No. 2026- duly passed and adopted by the Ontario City Council at their regular meeting held June 2, 2026.

_____________________________________

SHEILA MAUTZ, CITY CLERK

(SEAL)

545
Department: Economic Development
Prepared By: Charity Hernandez
Department:

Prepared By: Charity Hernandez
Staff Member Presenting: Jennifer McLain
Hiramoto, Economic Development Director
Approved By:

Submitted To: Council/OHA
Approved: _______________________________
Continued To: ___________________________
Denied: __________________________________
Item No: 28
SUBJECT:

A PUBLIC HEARING TO CONSIDER ADOPTING A RESOLUTION OF NECESSITY TO

ACQUIRE BY EMINENT DOMAIN A FEE SIMPLE INTEREST IN CERTAIN REAL PROPERTY LOCATED AT 1207 AND 1217 EAST HOLT BOULEVARD, CITY OF

ONTARIO, COUNTY OF SAN BERNARDINO, STATE OF CALIFORNIA AND MORE PARTICULARLY DESCRIBED AS ASSESSOR'S PARCEL NOS. 0110-061-10 AND 0110- 061-21 FOR THE GROVE AND HOLT HOUSING PROJECT

CITY OF ONTARIO
Agenda Report
June
2, 2026
SECTION:

PUBLIC HEARINGS

RECOMMENDATION:

That the City Council:

A. Consider adopting a Resolution of Necessity for the Grove and Holt Housing Project and provide each party with an interest in the aﬀected property, their attorneys or representatives, an opportunity to be heard on the issues relevant to the Resolution of Necessity; B. Make the following findings as hereinafter described in this report:
(1) The public interest and necessity require the proposed project; (2) The project is planned or located in a manner that will be most compatible with the greatest public good and the least private injury;
(3) The real property to be acquired is necessary for the project; (4) The offers of just compensation have been made to the property owners; and C. Adopt a Resolution of Necessity declaring that the acquisition by eminent domain of a fee simple interest in certain real property, more particularly described as Assessor’s Parcel Nos. 0110- 061-10 and 0110-061-21 (the “Property”), is necessary for the Grove and Holt Housing Project in Ontario, California (the “Project”).

THE FOLLOWING COUNCIL GOALS ARE BEING ACHIEVED:

Invest in the Growth and Evolution of the City's Economy Invest in the City's Infrastructure (Water, Streets, Sewers, Parks, Storm Drains and Public Facilities)
FISCAL IMPACT:

The deposit necessary to ﬁle the Resolution of Necessity for prejudgment possession of the property is approximately $8,403,000. If approved, additional appropriations will 546
be included in the Aﬀordability-In-Lieu fund and in the Ontario Housing Authority at a future quarterly budget update to City Council for approval as needed.

BACKGROUND & ANALYSIS:

The Property consists of two parcels located at 1207 and 1217 East Holt Boulevard in Ontario, California, as shown on Exhibit 1, for the City of Ontario’s Grove and Holt Housing Project. The City seeks to acquire a full fee interest in the parcels referenced above.

The City obtained an appraisal of the aﬀected property from Thompson & Thompson Real Estate Valuation and Consulting. On March 20, 2026, a written oﬀer of just compensation was made to the property owner for the acquisition pursuant to California Government Code section 7267.2.

The power of eminent domain is used by the City only as a last resort to obtain interests necessary for projects after (1) negotiations have stalled; (2) the owner has requested that the City proceed directly to eminent domain for tax or other advantages; or (3) the eminent domain process is necessary to clear title to the property. In this case, an oﬀer of just compensation was made to the owner for the value as determined by an independent appraisal. California’s deﬁnition of value requires the appraiser to consider the highest and best use of the property and the highest price a willing and fully informed buyer and seller would agree upon. The City’s appraisal must use this definition of value.

The City has received a response from one property owner to date. The City will continue its eﬀorts to communicate and negotiate with the property owner and/or its legal counsel, as the City remains interested in achieving a voluntary purchase of the property if possible. However, in the absence of a response and agreement, it is necessary to proceed with the eminent domain process to meet critical project deadlines.

A litigation guarantee was ordered to determine and conﬁrm the identity of the record owner.

Following a standard public records and due diligence search for ownership information, and pursuant to California Code of Civil Procedure section 1245.235, notice of this hearing was sent by ﬁrst class mail on Friday, May 15, 2026, to the record owner. The notice stated the City’s intent to consider adoption of a resolution, the right of the property owner to appear and be heard, and that failure to file a written request to appear may result in a waiver of that right.

DESCRIPTION OF PROPERTY TO BE ACQUIRED
: The aﬀected property is located at 1207 and 1217 East Holt Boulevard, Ontario, California, and is more particularly described as Assessor’s Parcel Nos. 0110-061-10 and 0110-061-21 (the “Property”).

The Property at 1207 East Holt consists of vacant land and is currently owned by Crossroad Ontario, LLC, a California limited liability company.

The Property at 1207 East Holt consists of the Capri Motel and is currently owned by 1217 Holt, LLC, a California limited liability company.

HEARINGS AND REQUIRED FINDINGS:

The recommended actions of the City Council pertain to the acquisition of a fee simple interest in the Property. A true and correct copy of the legal description and map of the Property sought to be acquired is attached to the Resolution of Necessity as Exhibits 1 and 2.
547
California eminent domain law provides that a public entity may not commence eminent domain proceedings until its governing body has adopted a resolution of necessity, which may only be adopted after the governing body has given each party with an interest in the aﬀected property, or their representatives, a reasonable opportunity to appear and be heard on the matters stated above.

The four required findings are addressed as follows:

The Public Interest and Necessity Require the Proposed Project The Grove and Holt Housing Project, in the City of Ontario, San Bernardino County, California, is necessary and serves the public interest because it facilitates the development of much needed aﬀordable housing consistent with local and State housing objectives. The State of California continues to experience a severe housing and aﬀordability crisis, resulting in a critical shortage of housing opportunities for lower-income households. Pursuant to the City’s adopted Housing Element and Regional Housing Needs Allocation (RHNA), the City is required to facilitate the development of 20,854 housing units, including 8,926 units aﬀordable to lower-income households, to accommodate projected population growth and existing housing needs.

The proposed project will provide new aﬀordable housing units that directly further the City’s housing production goals and commitment to expanding the availability of aﬀordable housing opportunities. The project will deliver substantial public beneﬁts by increasing the supply of aﬀordable housing in a strategic corridor with access to public transportation, employment opportunities, commercial services, and other community amenities. The project therefore promotes public health, safety, and welfare by addressing identiﬁed housing needs, supporting economic stability, reducing housing insecurity, and advancing the goals and policies of the City’s Housing Element and applicable State housing laws.

The Project is Planned or Located in a Manner That Will be Most Compatible With the Greatest Public Good and the Least Private Injury

As part of the Grove and Holt Housing Project, the proposed acquisition is undertaken for the public good and represents the least injurious means of facilitating the development of needed housing, while balancing impacts to surrounding properties and uses.

The Real Property to be Acquired is Necessary for the Proposed Project The property described and depicted in Exhibits 1 and 2 attached to the Resolution of Necessity, consisting of a fee simple interest in Assessor’s Parcel Nos. 0110-061-10 and 0110-061-21, is necessary for the development of the Grove and Holt Housing Project. Without this acquisition, the City will not have the legal right to enter, construct, or maintain the Project area necessary to proceed with development.

The proposed acquisition is limited to the minimum property interest necessary to complete the Project. No additional property beyond what is required to facilitate the residential development is being sought. Accordingly, the acquisition is necessary and proportional to the City’s stated public purpose.
548
The Offer of Just Compensation Has Been Made
An appraisal was prepared by Thompson & Thompson Real Estate Valuation and Consulting to establish the fair market value of the real property the City seeks to acquire. As discussed above, an oﬀer of just compensation was made to the property owner to purchase the fee simple interest as established by the approved appraisal and as required by California Government Code section 7267.2.

Although a negotiated settlement may still be possible, it is appropriate to commence the procedure to acquire the property through eminent domain to ensure that the City obtains possession of the real property necessary to proceed with the Project.

The assessor parcel numbers, and the party to whom the oﬀer was made and the date of the oﬀer is provided in following table:

APN's
Record Owner
Date of Offer
0110-061-10
Crossroad Ontario, LLC, a
California limited liability
company
03/20/2026
0110-061-21
1217 Holt, LLC, a California
limited liability company
03/20/2026
ENVIRONMENTAL ANALYSIS:

The proposed Holt and Grove Housing Project associated with the proposed Resolution of Necessity has been reviewed for compliance with the California Environmental Quality Act (CEQA), and is categorically exempt pursuant to Section 15332 (Class 32, In-Fill Development Projects) of the CEQA Guidelines. The Holt and Grove Housing Project meets the conditions and criteria outlined under CEQA Section 15332, and as a result no additional environmental analysis is necessary.

549

EXHIBIT “1”
1207 AND 1217 EAST HOLT BOULEVARD

550
`
RESOLUTION NO. _______

A RESOLUTION OF NECESSITY OF THE CITY COUNCIL OF THE CITY

OF ONTARIO , CALIFORNIA, FOR THE ACQUISITION BY EMINENT

DOMAIN OF A FEE SIMPLE INTEREST IN CERTAIN REAL PROPERTY LOCATED AT 1217 EAST HOLT BOULEVARD, IN THE CITY OF

ONTARIO, COUNTY OF SAN BERNARDINO, STATE OF CALIFORNIA, AND MORE PARTICULARLY DE SCRIBED AS ASSESSOR’S PARCEL
NO. 01 10-061-21-0-000, FOR THE GROVE AND HOLT HOUSING PROJECT, IN ONTARIO, CALIFORNIA.

WHEREAS, the City of Ontario (the “City”) proposes to acquire, by eminent domain, a fee simple interest in certain real property located at 1217 East Holt Boulevard, in the City of Ontario, County of San Bernardino, State of California, more particularly described as Assessor’s Parcel No. 0110-061-21-0-000, for the Grove and Holt Housing Project (the “Project”). The Project will facilitate the dev elopment of much -needed housing, support community growth, and enhance economic vitality in the surrounding area, and the City’s acquisition of such property is in accordance with the authority granted by Section 37350.5 of the California Government Code; and

WHEREAS, pursuant to Section 1245.235 of the California Code of Civil Procedure, the City scheduled a public hearing for Tuesday, June 2, 2026, at 6:30 p.m., at the Ontario City Hall, Council Chambers, 303 East “B” Street, Ontario, California, and gave to each person whose property is to be acquired and whose name and address appeared on the last equalized county assessment roll, notice and a reasonable opportunity to appear at said hearing and be heard on the matters referred to in Section 1240.030 of the California Code of Civil Procedure; and

WHEREAS, said hearing has been held by the City and each person whose property is to be acquired by eminent domain was afforded an opportunity to be heard on said matters; and

WHEREAS, the City may now adopt a Resolution of Necessity pursuant to Section 1240.040 of the California Code of Civil Procedure.

NOW, THEREFORE, THE CITY DOES HEREBY RESOLVE AND DECLARE AS FOLLOWS:

SECTION 1. Compliance with California Code of Civi l Procedure and California Environmental Quality Act. There has been compliance by the City with the requirements of Section 1245.235 of the California Code of Civil Procedure and the California Environmental Quality Act.

SECTION 2. Public Use. The public use of the real property interest to be acquired is to facilitate the development of housing as part of the Project, located in the City of Ontario, San Bernardino County, State of California, for the benefit of the public.

Section 37350.5 of the Ca lifornia Government Code authorizes the City to acquire by eminent domain real property necessary for such purposes. 551
`
SECTION 3. Description of Property. Attached and marked as Exhibit 1 is the legal description and depiction of the real property interest to be acquired by the City, which describes the general location and exte nt of the propert y interest to be acquired with sufficient detail for reasonable identification.

SECTION 4. Findings. The City hereby finds and determines each of the following:

(a) The public interest and necessity require the Project; (b) The Project is planned or located in the manner that will be most compatible with the greatest public good and least private injury; (c) The fee simple interest described in Exhibit 1 is necessary for the Project; (d) The offer required by Section 7267.2 of the California Government Code was made.

SECTION 5. Use Not Unreasonably Interfering with Existing Public Use:

Some or all of the real property to be acquired may be subject to easements and rights- of-way appropriated to existing public uses. The legal descriptions of these easements and rights-of-way are on file with the City and describe the general location and extent of the easements and rights-of-way with sufficient detail for reasonable identification. In the event the herein described use or uses will not unreasonably interfere with or impair the continuance of the public use as it now exists or may reasonably be expected to exist in the future, counsel for the City is au thorized to acquire the fee interest subject to such existing public use(s) pursuant to Section 1240.510 of the California Code of Civil Procedure.

SECTION 6. More Necessary Public Use. Some or all of the real property to be acquired may be subject to easements and rights -of-way appropriated to existing public uses. To the extent that the herein described use or uses will unreasonably interfere with or impair the continuance of the public use as it now exists or may reasonably be expected to exist in the future, the City finds and determines that the herein described use or uses are more necessary than said existing public use. Counsel for the City is authorized to acquire the real property appropriated to such existing public use(s) pursuant to Section 1240.610 of the California Code of Civil Procedure. Staff is further authorized to make such improvements to the real property being acquired that it determines is reasonably necessary to mitigate any adverse impact upon the existing public use.

SECTION 7. Further Activities. Counsel for the City is hereby authorized to file legal proceedings necessary to acquire the hereinabove described real property in the name of and on behalf of the City by eminent domain, and counsel is authorized to institute and prosecute such legal proceedings as may be required in connection therewith. Legal counsel is further authorized to take such steps as may be authorized and required by law, and to make such security deposits as may be required by order of court, to permit the City to take possession of and use said real property at the earliest possible time. Counsel is further authorized to correct any errors or to make or agree to non-material changes in the legal description of the real property that are deemed necessary for the conduct of the condemnation action or other proceedings or transactions required to acquire the subject real property. 552
`

SECTION 8. Effective Date. This Resolution shall take effect upon adoption.

The City Clerk of the City of Ontario shall certify as to the adoption of this Resolution.

PASSED, APPROVED, AND ADOPTED this 2nd day of June 2026.

_____________________________________
PAUL S. LEON, MAYOR

ATTEST:

____________________________________

SHEILA MAUTZ, CITY CLERK

APPROVED AS TO FORM:

____________________________________

BEST BEST & KRIEGER LLP

CITY ATTORNEY

553
`

STATE OF CALIFORNIA )

COUNTY OF SAN BERNARDINO )

CITY OF ONTARIO )

AYES: COUNCIL MEMBERS:

NOES: COUNCIL MEMBERS:

ABSENT: COUNCIL MEMBERS:

____________________________________

SHEILA MAUTZ, CITY CLERK

(SEAL)

The foregoing is the original of Resolution No. 2026- duly passed and adopted by the Ontario City Council at their regular meeting held June 2, 2026.

_____________________________________

SHEILA MAUTZ, CITY CLERK

(SEAL)

554

EXHIBIT 1
555
EXHIBIT "A"
Legal Description
Litigation Guarantee
CLTA Guarantee Form No. 1 (06/05/2014) Printed: 04.17.26 @ 03:27 AM

Page 4 ends

For APN/Parcel ID(s): 0110-061-10-0-000

THE LAND REFERRED TO HEREIN BELOW IS SITUATED IN THE CITY OF ONTARIO, COUNTY OF SAN BERNARDINO, STATE OF CALIFORNIA AND IS DESCRIBED AS FOLLOWS:

THE WEST 2 ACRES OF LOT 1017, ACCORDING TO MAP OF ONTARIO, IN THE CITY OF ONTARIO, COUNTY OF SAN BERNARDINO, STATE OF CALIFORNIA, AS PER PLAT RECORDED IN BOOK 11 OF MAPS, PAGE 6, RECORDS OF SAID COUNTY.

EXCEPT THE NORTH 20 FEET, THE SOUTH 13 FEET OF THE NORTH 33 FEET, THE WEST 44 FEET AND THE SOUTH 10 FEET DEEDED TO THE CITY OF ONTARIO FOR STREET PURPOSES.

THE HEREIN DESCRIBED PROPERTY IS ALSO SHOWN ON LICENSED LAND SURVEYORS MAP RECORDED IN BOOK 7 OF RECORD OF SURVEYS PAGE 35, RECORDS OF SAID COUNTY. 556
557
`
RESOLUTION NO. ________

A RESOLUTION OF NECESSITY OF THE CITY COUNCIL OF THE CITY

OF ONTARIO , CALIFORNIA, FOR THE ACQUISITION BY EMINENT

DOMAIN OF A FEE SIMPLE INTEREST IN CERTAIN REAL PROPERTY LOCATED AT 1207 EAST HOLT BOULEVARD, IN THE CITY OF

ONTARIO, COUNTY OF SAN BERNARDINO, STATE OF CALIFORNIA, AND MORE PARTICULARLY DE SCRIBED AS ASSESSOR’S PARCEL
NO. 01 10-061-10-0-000, FOR THE GROVE AND HOLT HOUSING
PROJECT, IN ONTARIO, CALIFORNIA.

WHEREAS, the City of Ontario (the “City”) proposes to acquire, by eminent domain, a fee simple interest in certain real property located at 1207 East Holt Boulevard, in the C ity of Ontario, County of San Bernardino, State of California, more particularly described as Assessor’s Parcel No. 0110-061-10-0-000, for the Grove and Holt Housing Project (the “Project”). The Project will facilitate the development of much -needed housing, support community growth, and enhance economic vitality in the surrounding area, and the City’s acquisition of such property is in accordance with the authority granted by Section 37350.5 of the California Government Code; and

WHEREAS, pursuant t o Section 1245.235 of the California Code of Civil Procedure, the City scheduled a public hearing for Tuesday, June 2, 2026, at 6:30 p.m., at the Ontario City Hall, Council Chambers, 303 East “B” Street, Ontario, California, and gave to each person whose p roperty is to be acquired and whose name and address appeared on the last equalized county assessment roll, notice and a reasonable opportunity to appear at said hearing and be heard on the matters referred to in Section 1240.030 of the California Code of Civil Procedure; and

WHEREAS, said hearing has been held by the City and each person whose property is to be acquired by eminent domain was afforded an opportunity to be heard on said matters; and

WHEREAS, the City may now adopt a Resolution of Necessity pursuant to Section 1240.040 of the California Code of Civil Procedure.

NOW, THEREFORE, THE CITY DOES HEREBY RESOLVE AND DECLARE AS FOLLOWS:

SECTION 1. Compliance with California Code of Civil Procedure and California Environmental Quality Act. There has been compliance by the City with the requirements of Section 1245.235 of the California Code of Civil Procedure and the California Environmental Quality Act.

Section 37350.5 of the California Government Code authorizes the City to acquire by eminent domain real property necessary for such purposes.

558
`
SECTION 3. Description of Property. Attached and marked as Exhibit 1 is the legal description an d depiction of the real property interest to be acquired by the City, which describes the general location and exte nt of the propert y interest to be acquired with sufficient detail for reasonable identification.

SECTION 4. Findings. The City hereby finds and determines each of the following:

SECTION 5. Use Not Unreasonably Interfering with Existing Public Use: Some or all of the real property to be acquired may be subject to easements and rights -of-way appropriated to existing public uses. The legal descriptions of these easements and rights-of-way are on file with the City and describe the general location and extent of the easements and rights -of-way with sufficient detail for reasonable identification. In the event the herein described use or uses will not unreasonably interfere with or impair the continuance of the public use as it now exists or may reasonably be expected to exist in the future, counsel for the City is authorized to acquire the fee interest subject to such existing public use(s) pursuant to Section 1240.510 of the California Code of Civil Procedure.

SECTION 6. More Necessary Public Use. Some or all o f the real property to be acquired may be subject to easements and rights -of-way appropriated to existing public uses. To the extent that the herein described use or uses will unreasonably interfere with or impair the continuance of the public use as it n ow exists or may reasonably be expected to exist in the future, the City finds and determines that the herein described use or uses are more necessary than said existing public use. Counsel for the City is authorized to acquire the real property appropriated to such existing public use(s) pursuant to Section 1240.610 of the California Code of Civil Procedure. Staff is further authorized to make such improvements to the real property being acquired that it determines is reasonably necessary to mitigate any adverse impact upon the existing public use.

SECTION 7. Further Activities. Counsel for the City is hereby authorized to file legal proceedings necessary to acquire the hereinabove described real property in the name of and on behalf of the City by eminent domain, and counsel is authorized to institute and prosecute such legal proceedings as may be required in connection therewith. Legal counsel is further authorized to take such steps as may be authorized and required by law, and to make such security deposits as may be required by order of court, to permit the City to take possession of and use said real property at the earliest possible time. Counsel is further authorized to correct any errors or to make or agree to non-material changes in the le gal description of the real property that are deemed necessary for the conduct of the condemnation action or other proceedings or transactions required to acquire the subject real property. 559
`

SECTION 8. Effective Date. This Resolution shall take effect upon adoption.

The City Clerk of the City of Ontario shall certify the adoption of this Resolution.

PASSED, APPROVED AND ADOPTED this 2nd day of June, 2026.

_____________________________________
PAUL S. LEON, MAYOR

ATTEST:

________________________________

SHEILA MAUTZ, CITY CLERK

APPROVED AS TO LEGAL FORM:

_______________________________

BEST, BEST & KRIEGER LLP

CITY ATTORNEY
560
`
STATE OF CALIFORNIA: )
COUNTY OF SAN BERNARDINO: )
CITY OF ONTARIO: )

I, SHEILA MAUTZ, City Clerk of the City of Ontario, DO HEREBY CERTIFY that foregoing Resolution No. 2026-_______ was duly passed and adopted by the City Council of the City of Ontario at their regular meeting held June 2, 2026 by the following roll call vote, to wit:

AYES: COUNCIL MEMBERS:

NOES: COUNCIL MEMBERS:

ABSENT: COUNCIL MEMBERS:

____________________________________

SHEILA MAUTZ, CITY CLERK

(SEAL)

The foregoing is the original of Resolution No. 2026-_______ duly passed and adopted by the Ontario City Council at their regular meeting held June 2, 2026.

_____________________________________

SHEILA MAUTZ, CITY CLERK

(SEAL)

561

EXHIBIT 1
562
EXHIBIT "A"
Legal Description
Litigation Guarantee
CLTA Guarantee Form No. 1 (06/05/2014) Printed: 04.17.26 @ 04:04 AM

Page 4 ends

For APN/Parcel ID(s): 0110-061-21-0-000

THE LAND REFERRED TO HEREIN BELOW IS SITUATED IN THE CITY OF ONTARIO, COUNTY OF SAN BERNARDINO, STATE OF CALIFORNIA AND IS DESCRIBED AS FOLLOWS:

PARCEL NO. 1:

THE SOUTH 287.00 FEET OF THE WEST 188.90 FEET OF THE EAST 3 ACRES OF THE WEST 5 ACRES OF LOT 1017, MAP OF ONTARIO, AS PER PLAT RECORDED IN BOOK 11, PAGE 6, OF MAPS, IN THE CITY OF ONTARIO, COUNTY OF SAN BERNARDINO, STATE OF CALIFORNIA.

EXCEPT THE INTEREST IN THE SOUTH 10.00 FEET THEREOF AS CONVEYED TO THE CITY OF ONTARIO, FOR STREET PURPOSES BY THE DEED RECORDED MARCH 9, 1936 IN BOOK 3881, PAGE 540 OFFICIAL RECORDS.

PARCEL NO. 2:

AN EASEMENT FOR INGRESS AND EGRESS OVER AND ACROSS THE EAST 20.00 FEET OF THE SOUTH 287.00 FEET OF THE WEST 208.90 FEET OF THE EAST 3 ACRES OF THE WEST 5 ACRES OF LOT 1017, MAP OF ONTARIO, AS PER PLAT RECORDED IN BOOK 11, PAGE 6, OF MAPS, IN THE CITY OF ONTARIO, COUNTY OF SAN BERNARDINO, STATE OF CALIFORNIA.

EXCEPT THE INTEREST IN THE SOUTH 10.00 FEET THEREOF AS CONVEYED TO THE CITY OF ONTARIO FOR STREET PURPOSES BY THE DEED RECORDED MARCH 9, 1936 IN BOOK 3881, PAGE 540, OFFICIAL RECORDS. 563
564
46700.20165\44351930.2

NOTICE OF HEARING TO PROPERTY OWNER
Pursuant to Section 1245.235 of the California Code of Civil Procedure, you are hereby notified that at a regular meeting to be held on Tuesday, June 2, 2026 at 6:30 p.m., at Ontario City Hall, City Council Chambers, 303 East B Street, Ontario, California, the City Council of the City of Ontario intends to consider adopting a Resolution of Necessity authorizing the commencement of eminent domain proceedings for the acquisition, for public use, of the fee in certain real property which, according to the last equalized county assessment roll, you own. The public use and project for which this Resolution of Nece ssity will be considered is for the NE Corner of Holt & Grove Housing Project. The description of the property to be acquired is attached as Exhibit “1” to this notice.

A hearing will be held at the time and place mentioned above. You have the right to appear and be heard on the following matters:

1. Whether the public interest and necessity require the project for which the property is sought to be acquired.

2. Whether the project is planned or located in the manner that will be most compatible with the greatest public good and least private injury.

3. Whether the property is necessary for the proposed project.

4. Whether the offer required by Section 7267.2 of the California Government Code has been made.

Members of the public may utilize alternative measures established by the City of Ontario to view the City council meetings and/or to address the Mayor and City Council Members. 565
46700.20165\44351930.2

The meeting will be live broadcast on local cable Channel 3 as well as internet live streamed:: www.ontarioca.gov/Agendas/CityCouncil.

TO PROVIDE PUBLIC COMMENT:

Online: You may submit your comments online by filling out a Public Comment Form no later than 4 PM on the day of the meeting. You may also submit your comments by email no later than 4 PM on the day of the meeting by emailing your name, agenda item you are commenting on and your comments to [email protected]. All comments received by the deadline will be forwarded to the City Council for consideration before action is taken on the matter.

Mail: To submit your comments by mail, provide your name, ag enda item you are commenting on, and your comments by mailing to Records Management, Ontario City Hall, 303 East “B” Street, Ontario, CA 91764. Comments by mail must be received in the Records Management Department no later than 4:00 p.m. on the day of th e meeting. Postmarks are not accepted. All comments received by the deadline will be provided to the City Council for consideration before action is taken on the matter.

This is a public meeting, and the City reserves the right to revert it to an in-person meeting.

Please be advised , your failure to file a written request to appear and be heard within 15 days after the mailing of this notice may result in the waiver of your right to appear and be heard.
566
46700.20165\44351930.2

ALL COMMUNICATIONS SHOULD BE ADDRESSED TO:

Sheila Mautz
City Clerk
City of Ontario
303 East B Street
Ontario, California 91764
DATE OF HEARING: Tuesday, June 2, 2026
6:30 p.m.

PLACE OF HEARING: City Council Chambers
Ontario City Hall
City of Ontario
303 East B Street
Ontario, California 91764

DATED: ___________,2026 BEST BEST & KRIEGER LLP

By: ______________________________________
Mark A. Easter
Attorney for City of Ontario
567
46700.20165\44351930.2

PROOF OF MAILING NOTICE
I, Mandy Villareal, acting on behalf of the City of Ontario, hereby certify that on ____________, 2026, I mailed a copy of the attached notice by first -class mail to the following owners of real property located in the County of San Bernardino, State of California, more particularly described as Assessor’s Parcel No. 0110-061-10-0-000 Crossroad Ontario, LLC, a California limited
liability company
c/o Yoon Ku Byun, Agent for Service of
Process
23550 Alessandro Blvd., #104
Moreno Valley, CA 92553
Record Owner

Record Owner

DATED: ___________, 2026 ___________________________________

568
46700.20165\44351930.2

A hearing will be held at the time and place mentioned above. You have the right to appear and be heard on the following matters:

1. Whether the public interest and necessity require the project for which the property is sought to be acquired.

2. Whether the project is planned or located in the manner that will be most compatible with the greatest public good and least private injury.

3. Whether the property is necessary for the proposed project.

4. Whether the offer required by Section 7267.2 of the California Government Code has been made.

The meeting will be live broadcast on local cable Channel 3 as well as internet live streamed:: www.ontarioca.gov/Agendas/CityCouncil.

TO PROVIDE PUBLIC COMMENT:

This is a public meeting, and the City reserves the right to revert it to an in-person meeting.

ALL COMMUNICATIONS SHOULD BE ADDRESSED TO:

Sheila Mautz
City Clerk
City of Ontario
303 East B Street
Ontario, California 91764
DATE OF HEARING: Tuesday, June 2, 2026
6:30 p.m.

PLACE OF HEARING: City Council Chambers
Ontario City Hall
City of Ontario
303 East B Street
Ontario, California 91764

DATED: ___________,2026 BEST BEST & KRIEGER LLP

By: ______________________________________
Mark A. Easter
Attorney for City of Ontario
571
46700.20165\44351930.2

PROOF OF MAILING NOTICE
I, Mandy Villareal, acting on behalf of the City of Ontario, hereby certify that on ____________, 2026, I mailed a copy of the attached notice by first -class mail to the following owners of real property located in the County of San Bernardino, State of California, more particularly described as Assessor’s Parcel No. 0110-061-21-0-000 1217 Holt, LLC, a California limited liability
company
c/o Frida Zakaryan, Agent for Service of
Process
8739 McLennan Avenue
Northridge, CA 91343
Record Owner

Record Owner

DATED: ___________, 2026 ___________________________________

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46700.20164\44335063.2

June 2, 2026

MEMORANDUM

TO: MAYOR, CITY COUNCIL, AND CITY MANAGER

OF THE CITY OF ONTARIO
FROM: CITY ATTORNEY
RE: RESOLUTION OF NECESSITY BY THE CITY OF ONTARIO FOR THE

ACQUISITION BY EMINENT DOMAIN OF A FEE SIMPLE I NTEREST IN CERTAIN REAL PROPERTIES LOCATED AT 1207 EAST HOLT
BOULEVARD AND 1217 EAST HOLT BOULEVARD, IN THE CITY OF

ONTARIO, COUNTY OF SAN BERNARDINO, STATE OF CALIFORNIA, MORE PARTICULARLY DESCRIBED AS ASSESSOR’S PARCEL NOS. 0110- 061-10-0-000 AND 0110 -061-21-0-000, FOR THE NE CORNER OF HOLT &

GROVE HOUSING PROJECT, IN ONTARIO, CALIFORNIA

The City of Ontario is considering a proposed Resolution of Necessity to initiate condemnation proceedings to acquire a fee simple interest in certain real properties located at 1207 East Holt Boulevard and 1217 East Holt Boulevard, Ontario, California, more particularly described as Assessor’s Parcel Nos. 0110-061-10-0-000 and 0110-061-21-000, for the NE Corner of Holt & Grove Housing Project. The hearing is set for Tuesday, June 2, 2026. Notice of this hearing has been sent to the affected property owners.

After the hearing is opened, a staff member, preferably the City Clerk, should note for the record the proof of mailing of the notice of hearing to the affected property owners. The notice of hearing invited the property owners to appear and be heard on the matters described below. If

CONFIDENTIAL

NOT FOR PUBLIC DISCLOSURE

ATTORNEY-CLIENT PRIVILEGE
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a written request to appear at the hearing is made, then the owner or its representatives must be allowed to speak.

Under Eminent Domain Law, no one other than a person with an interest in the property is legally entitled to speak at the hearing. Amendments to the Brown Act suggest, however, that the public may be entitled to speak at the hearing. We recommend that the City initially limit all public comment to those persons who have an ownership interest in the properties. This is advisable because the purpose of the hearing is to give property owners an opportunity to present their position as to whether or not condemnation should be initiated. After any property owner has had the opportunity to speak, the public may participate.

The only issues to be addressed at the hearing on the resolution are:
(a) Whether the public interest and necessity require the proposed project; (b) Whether the proposed project is planned or located in the manner that will be most compatible with the greatest public good and least private injury; (c) Whether the real property described in the resolution is necessary for the proposed project; and
(d) Whether the required offer to purchase the real property was made.1 A representative of the City should make a presentation giving the basis for acquiring the real property and explaining the project. Each of the findings listed above should be addressed in the report.

1 The fair market value of the property is not an issue to be discussed at the hearing. 574
46700.20164\44335063.2

In the course of the public hearing, no members of the City Council should suggest that they have prejudged the issue as to whether condemnation proceedings should be initiated. The purpose of the hearing is to review that very question. The hearing should be conducted in a way that provides a full and fair opportunity for the involved owners to present their views on the potential condemnation.

After owners and public comments have been made, a vote should be taken on adoption of the resolution. (It is not recommended that the City Council go into closed session to consider how to vote on the resolution.) The resolution will only be adopted if two-thirds of the City Council vote to adopt. That means that at least four members of the City Council must vote in favor of the resolution for it to be adopted. If there will not be a sufficient number of Council members at the hearing, you may wish to continue the hearing. In this regard, it is also important for counsel to be informed if any member of the City Council has an interest in any property or business that may be affected by the proposed project or acquisition.

If the resolution is adopted, counsel will initiate condemnation proceedings and, if so instructed, will attempt to obtain an order for prejudgment possession of the property. Legally, the City does not need to file a condemnation lawsuit right away, but in any event should file the lawsuit within six months after the adoption of the resolution in order to avoid exposure to a suit in inverse condemnation.

Attached to this memorandum is a proposed agenda (script) for conducting the hearing.

This is simply a guide for the presiding officer at the hearing to know what steps to follow in the course of the hearing. Also included is the proposed resolution of necessity authorizing 575
46700.20164\44335063.2

condemnation. The original notice of hearing that was sent to the property owner and proof of mailing is on file with the City Clerk’s office.

If you have any questions, please do not hesitate to contact us.

MARK EASTER

Enclosure
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46700.20164\44335063.2

AGENDA
City of Ontario
June 2, 2026

1. THE PRESIDING OFFICER OPENS THE HEARING.

2. THE RESIDING OFFICER EXPLAINS THAT THIS IS A HEARING ON A

RESOLUTION OF NECESSITY FOR THE ACQUISITION, BY EMINENT DOMAIN,

OF A FEE SIMPLE INTEREST IN CERT AIN REAL PROPERTIES LOCATED AT 1207 EAST HOLT BOULEVARD AND 1217 EAST HOLT BOULEVARD, IN THE

CITY OF ONTARIO, COUNTY OF SAN BERNARDINO, STATE OF CALIFORNIA, MORE PARTICULARLY DESCRIBED AS ASSESSOR’S PARCEL NOS. 0110-061- 10-0-000 AND 0110 -061-21-0-000, FOR THE NE CORNER OF HOLT & GROVE HOUSING PROJECT, IN ONTARIO, CALIFORNIA.

3. PRESIDING OFFICER REQUESTS THAT THE CITY’S LEGAL COUNSEL EXPLAIN THE NATURE AND SCOPE OF THE HEARING.

4. PRESIDING OFFICER CALLS UPON THE CITY CLERK TO CONFIRM THAT

NOTICE OF THIS HEARING WAS MAILED TO THE AFFECTED PROPERTY OWNERS.

5. PRESIDING OFFICER CALLS UPON STAFF FOR A REPORT ON HOW THE REAL PROPERTY TO BE ACQUIRED RELATES TO THE CITY'S PURPOSES.

6. PRESIDING OFFICER CALLS FOR THE CITY CLERK TO NOTE ALL WRITTEN

OBJECTIONS, PROTESTS, AND REQUESTS TO BE HEARD WHICH HAVE BEEN FILED, RECEIVED, READ AND CONSIDERED.

7. PRESIDING OFFICER CALLS UPON ALL PERSONS WITH AN INTEREST IN THE PROPERTIES WHO WISH TO BE HEARD TO COME FORWARD.

8. PRESIDING OFFICER CALLS UPON ALL OTH ER PERSONS WH O WISH TO BE HEARD.

9. AT THIS POINT, THE PRESIDING OFFICER CAN GIVE STAFF AND/OR LEGAL COUNSEL THE OPPORTUNITY TO COMMENT/RESPOND TO ANY OBJECTIONS.

ALTERNATIVELY, THE PRESIDING OFFICER CAN SIMPLY OPEN THE MATTER

UP FOR DISCUSSION/QUESTIONS WITH THE OTHER CITY COUNCIL MEMBERS.

10. IF THERE ARE NO OTHER QUESTIONS OR COMMENTS, THE PRESIDING OFFICER CLOSES THE HEARING AND ASKS IF THERE IS A MOTION.

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46700.20164\44335063.2

11. THE MOTION IS MADE AND A VOTE IS TAKEN AS TO WHETHER TO ADOPT THE RESOLUTION OF NECESSITY.
578
Department: Utilities
Prepared By: Thomas Lambertson
Staff Member Presenting: Scott Burton, Utilities
General Manager
Reviewed By: Dennice Raygoza, Courtney
Jones, Michael Sigsbee
Approved By:

Submitted To: Council/OHA
Approved: _______________________________
Continued To: ___________________________
Denied: __________________________________
Item No: 29
SUBJECT:

A PUBLIC HEARING TO RECEIVE AND RESPOND TO PUBLIC COMMENTS ON THE DRAFT 202
5 URBAN WATER MANAGEMENT PLAN, DRAFT WATER SHORTAGE

CONTINGENCY PLAN,
AND RESOLUTIONS ADOPTING THE 202
5 URBAN WATER

MANAGEMENT PLAN AND

WATER SHORTAGE CONTINGENCY PLAN

CITY OF ONTARIO
Agenda Report
June
2, 2026
SECTION:

PUBLIC HEARINGS

RECOMMENDATION:

That the City Council:

A
.

Conduct a public hearing to receive and respond to Public Comments on the Draft 2025 Urban Water Management Plan and Draft Water Shortage Contingency Plan.

B
.

Adopt Resolutions adopting the 2025 Urban Water Management Plan and Water Shortage Contingency Plan.

THE FOLLOWING COUNCIL GOALS ARE BEING ACHIEVED:

Pursue City's Goals and Objectives by Working with Other Governmental Agencies Invest in the Growth and Evolution of the City's Economy Ensure the Development of a Well Planned, Balanced, and Self-Sustaining Community in Ontario Ranch
FISCAL IMPACT:

The water programs described in the Draft 202
5 Urban Water Management Plan
are consistent with City Council approved
goals,
objectives
,
and budgets for
water
supplies,
conservation
programs, and
other related
activities
. There is not a ﬁscal impact associated with this
action.

BACKGROUND & ANALYSIS:

The California Urban Water Management Planning Act (Water Code Section 10610, et. seq. (the Act)) mandates that every urban water supplier providing water for municipal purposes to more than 3,000 customers, or annually supplying more than 3,000 acre-feet of water, prepare an Urban Water Management Plan (UWMP) every ﬁve years to specify long-term water resource planning 579
objectives and ensure adequate water supplies to meet existing and future demands. The Act also mandates the preparation and adoption of a Water Shortage Contingency Plan (WSCP) as part of the UWMP to provide a detailed approach of how the City intends to act, or respond, in the case of an actual water shortage contingency.

The 2025 UWMP and WSCP are required to be adopted by City Council and submitted to the California Department of Water Resources (DWR) by July 1, 2026.

Ontario Municipal Utilities Company (OMUC) participated in a joint eﬀort with ten participating agencies, governed by a cost sharing agreement, to have Water Systems Consulting, Inc. (WSC) develop the 2025 UWMP and WSCP in accordance with State guidelines and requirements. The Draft 2025 UWMP has been developed in coordination with the UWMPs prepared by the Water Facilities Authority (WFA), Inland Empire Utilities Agency (IEUA), and the Chino Basin Desalter Authority (CDA) to ensure regional consistency. The Act requires an UWMP to describe and evaluate sources of supply, reasonable and practical eﬃcient water uses, such as recycling, and water demand management activities. It also requires an UWMP to evaluate the capability to supply water in drought periods as well as normal years. The Draft 2025 UWMP also outlines the City’s compliance with Senate Bill SB X7-7 which required a 20% reduction in per capita water consumption. In addition, the Draft 2025 UWMP is written to be used as a foundation for preparing water supply assessments and written veriﬁcations as required by Senate Bills 610 and 221 for new projects subject to CEQA consisting of more than 500 dwelling units or equivalent water use. The Draft WSCP is incorporated within the Draft 2025 UWMP as a chapter.

The City purchases locally treated State Water Project (SWP) imported water directly from the WFA.

WFA obtains this water from the IEUA, the member agency of the SWP Contractor (Metropolitan Water District). Through the SWP, the City may indirectly receive water through a proposed covered action, such as a multi-year water transfer, conveyance facility, or new diversion that involves transferring water through, exporting water from, or use of water within the Delta.

Through an Appendix in the Draft 2025 UWMP, the City is providing information that may be used in the covered action process to demonstrate consistency with the Delta Plan Policy WR P1 to Reduce Reliance on the Delta Through Improved Regional Water Self-Reliance [California Code of Regulations (CCR), Title 23, § 5003].

The City has always actively managed its water resources for the population that it serves to ensure the quality, quantity, and reliability of its water supply in a cost-eﬀective manner. In accordance with “The Ontario Plan,” the City has developed its own Water, Recycled Water and Sewer Master Plans and recognizes IEUA’s Regional Water Use Eﬃciency Business Plan. Collectively, these planning documents act as the City’s road map for ensuring reliable, cost-eﬀective, and environmentally responsible water supplies for the next 25 years. This approach follows the City’s vision goal of “A sustained, community-wide prosperity which continuously adds value and yields beneﬁts.” The Draft 2025 UWMP meets the City’s vision goal by proactively analyzing the present, past, and future state of the water supply and builds upon the foundations laid out by “The Ontario Plan.”
580
RESOLUTION. _________

A RESOLUTION OF THE CITY COUNCIL OF THE CITY OF ONTARIO, CALIFORNIA, ADOPTING THE 202 5 URBAN WATER MANAGEMENT
PLAN (UWMP).

WHEREAS, The California Urban Water Management Planning Act, (Wat. Code § 10610, et seq. (the Act)), mandates that every urban supplier of water providing water for municipal purposes to more than 3,000 customers or supplying more than 3,000 acre feet of water annually, prepare, and adopt an Urban Water Management Plan (UWMP); and

WHEREAS, the Act generally requires that said UWMP be updated and adopted at least once every five years on or before July 1, in years ending in six and one; and

WHEREAS, pursuant to recent amendments to the Act, urban water suppliers are required to update and electronically submit their 202 5 UWMP to the California Department of Water Resources (DWR) by July 1, 2026; and

WHEREAS, pursuant to Water Conservation Act of 2009, al so referred to as SB X7-7 (Wat. Code § 10608 et seq.), an “urban retail water supplier” is defined as a water supplier 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, and an “urban wholesale water supplier” is defined as a water supplier that provides more than 3,000 acre feet of water annually at wholesale for potable municipal purposes; and

WHEREAS, the City of Ontario meets the definition of an urban reta il water supplier for purposes of the Act and SB X7-7; and

WHEREAS, the City of Ontario has prepared an 2025 UWMP in accordance with the Act and SB X7 -7, and in accordance with applicable legal requirements, has undertaken certain coordination, notice, public involvement, public comment, and other procedures in relation to its 2025 UWMP; and

WHEREAS, in accordance with the Act and SB X7 -7, the City of Ontario has prepared its 2025 UWMP with its own staff, with the assistance of consulting professionals, and in cooperation with other governmental agencies, and has utilized and relied upon industry standards and the expertise of industry professionals in preparing its 2025 UWMP, and has a lso utilized DWR’s Urban Water Management Plan Guidebook 2025, including its related appendices, in preparing its 2025 UWMP; and

WHEREAS, in accordance with applicable law, including Water Code section s 10608.26 and 10642, and Government Code section 6066, a Notice of a Public Hearing regarding the City of Ontario ’s 2025 UWMP was published within the jurisdiction of the City of Ontario on May 19, 2026 and May 26, 2026; and

581
WHEREAS, in accordance with applicable law, including but not limited to Water Code sections 10608.26 and 10642, a public hearing was held on June 2, 2026 at 6:30 PM, or soon thereafter, in City of Ontario City Hall in order to provide members of the public and other interested entities with the opportunity to be heard in connection with proposed adoption of the 2025 UWMP and issues related thereto; and

WHEREAS, pursuant to said public hearing on City of Ontario’s 2025 UWMP, City of Ontario , among other things, encouraged the active involvement of diverse social, cultural, and economic members of the community within City of Ontario’s service area with regard to the 2025 UWMP and encouraged community input regarding City of Ontario’s 2025 UWMP; and

WHEREAS, the City Council of the City of Ontario has reviewed and considered the purposes and requirements of the Act and SB X7-7, the contents of the 2025 UWMP, and the documentation contained in the administrative record in support of the 202 5 UWMP, and has determined that the factual analyses and conclusions set forth in the 2025 UWMP are legally sufficient; and

WHEREAS, the City Council of the City of Ontario desires to adopt the 202 5 UWMP prior to July 1, 2026 in order to comply with the Act and SB X7-7; and

NOW THEREFORE BE IT RESOLVED, the City Council of the City of Ontario hereby resolves as follows:

1. The City of Ontario ’s 20 25 UWMP is hereby adopted as amended by changes incorporated by the City Council of th e City of Ontario as a result of input received (if any) at the public hearing and ordered filed with the Secretary of the City Council of the City of Ontario.

2. The Utilities General Manager is hereby authorized and directed to include a copy of this Resolution in the City of Ontario’s 2025 UWMP.

3. The Utilities General Manager is hereby authorized and directed, in accordance with Water Code sections 10621(d) and 10644(a)(1) -(2), to electronically submit a copy of the 2025 UWMP to the DWR no later than July 1, 2026.

4. The Utilities General Manager is hereby authorized and directed, in accordance with Water Code section 10644(a), to submit a copy of the 2025 UWMP to the Californ ia State Library, and any city of county within which the City of Ontario provides water supplies no later than thirty (30) days after this adoption date.

5. The Utilities General Manager is hereby authorized and directed, in accordance with Water Code section 10645, to make the 2025 UWMP available for public review at the City of Ontario ’s offices during normal business hours or on its website at https://www.ontarioca.gov/government/municipal-utilities-company/water-quality no later than thirty (30) days after filing a copy of the UWMP with DWR.

582

6. The Utilities General Manager is hereby authorized and directed, in accordance with Water Code Section 10635(c), to provide that portion of the 2025 UWMP prepared pursuant to Water Code Section 10635(a)-(b) to any city or county within which the City of Ontario provides water supplies no later than sixty (60) days after submitting a copy of the UWMP with DWR.

7. The Utilities General Manager is hereby authorized and directed to implement the 202 5 UWMP in accordance with the Act and SB X7 -7 and to provide recommendations to the City Council of the City of Ontario regarding the necessary budgets, procedures, rules, regulations, or further actions to carry out the effective and equitable implementation of the 2025 UWMP.

8. The document and materials that constitute the record of proceedings on which this Resolution and the above findings have been based are located at City Hall, 303 East “B” Street, Ontario, CA 91764. The custodian for these records is the City Clerk of the City of Ontario.

The City Clerk of the City of Ontario shall certify as to the adoption of this Resolution.

PASSED, APPROVED, AND ADOPTED this 2nd day of June 2026.

_____________________________________
PAUL S. LEON, MAYOR

ATTEST:

____________________________________

SHEILA MAUTZ, CITY CLERK

APPROVED AS TO FORM:

____________________________________

BEST BEST & KRIEGER LLP

CITY ATTORNEY

583

STATE OF CALIFORNIA )

COUNTY OF SAN BERNARDINO )

CITY OF ONTARIO )

AYES: COUNCIL MEMBERS:

NOES: COUNCIL MEMBERS:

ABSENT: COUNCIL MEMBERS:

____________________________________

SHEILA MAUTZ, CITY CLERK

(SEAL)

The foregoing is the original of Resolution No. 2026- duly passed and adopted by the Ontario City Council at their regular meeting held June 2, 2026.

_____________________________________

SHEILA MAUTZ, CITY CLERK

(SEAL)

584
EXHIBIT A 2025 URBAN WATER MANAGEMENT PLAN
585
2025 Urban Water Management PlanMAY 2026CITY OF ONTARIO 586
2025 Urban Water Management PlanMAY 2026Prepared by Water Systems Consulting, Inc 587
City of OntarioTable of Contents
2025 Urban Water Management Plan | ii
TABLE OF CONTENTS 1 Introduction ...................................................................................................................... 1-1 1.1 Introduction for the City ............................................................................................. 1-1 1.2 UWMP Organization and Lay Description ................................................................. 1-2 1.3 UWMPs in Relation to Other Efforts .......................................................................... 1-4 1.4 UWMPs and Grant or Loan Eligibility ........................................................................ 1-5 1.5 Demonstration of Consistency with the Delta Plan for Participants in Covered Actions 1-5 2 Plan Preparation .............................................................................................................. 2-1 2.1 Basis for Preparing a Plan ........................................................................................ 2-2 2.2 Regional Planning ..................................................................................................... 2-2 2.3 Coordination and Outreach ....................................................................................... 2-4 3 System Description .......................................................................................................... 3-1 3.1 General Description .................................................................................................. 3-2 3.2 Service Area Boundary Maps ................................................................................... 3-2 3.3 Service Area Climate ................................................................................................ 3-4 3.4 Service Area Population and Demographics ............................................................. 3-6 3.5 Land Uses within Service Area ................................................................................. 3-7 4 Water Use Characterization ............................................................................................. 4-1 4.1 Non-Potable Versus Potable Water Use ................................................................... 4-2 4.2 Past, Current, and Projected Water Use by Sector ................................................... 4-2 4.3 Water Use for Lower Income Households ................................................................. 4-8 4.4 Climate Change Considerations ................................................................................ 4-8 5 SB X7-7 Compliance & Future Water Use Efficiency Requirements................................. 5-1 5.1 Compliance and Future Water Use Efficiency Requirements .................................... 5-2 6 Water Supply Characterization ......................................................................................... 6-1 6.1 Potable Water Supply Sources ................................................................................. 6-2 6.2 Wastewater and Recycled Water ............................................................................ 6-10 6.3 Stormwater ............................................................................................................. 6-19 6.4 Desalinated Water Opportunities ............................................................................ 6-19 6.5 Water Exchanges and Transfers ............................................................................. 6-20 6.6 Supply From Storage .............................................................................................. 6-21 6.7 Future Water Projects ............................................................................................. 6-21 6.8 Historical Production and Future Water Supplies .................................................... 6-21 588
City of OntarioTable of Contents
2025 Urban Water Management Plan | iii

6.9 Climate Change Effects .......................................................................................... 6-24 6.10 Energy Use ......................................................................................................... 6-25 7 Water Service Reliability .................................................................................................. 7-1 7.1 Introduction ............................................................................................................... 7-2 7.2 Water Service Reliability Assessment ....................................................................... 7-2 7.3 Drought Risk Assessment ......................................................................................... 7-6 8 Water Shortage Contingency Plan ................................................................................... 8-1 8.1 Introduction ............................................................................................................... 8-2 8.2 Overview of WSCP Components .............................................................................. 8-2 8.3 Water Supply Reliability Analysis .............................................................................. 8-3 8.4 Annual Water Supply and Demand Assessment Procedures .................................... 8-4 8.5 Six Standard Water Shortage Levels ........................................................................ 8-6 8.6 Shortage Response Actions ...................................................................................... 8-8 8.7 Communication Protocols ....................................................................................... 8-26 8.8 Compliance and Enforcement ................................................................................. 8-26 8.9 Legal Authorities ..................................................................................................... 8-26 8.10 Financial Consequences of WSCP ...................................................................... 8-27 8.11 Monitoring and Reporting .................................................................................... 8-28 8.12 WSCP Refinement Procedures ........................................................................... 8-29 8.13 Special Water Feature Distinction ....................................................................... 8-29 8.14 Plan Adoption, Submittal, and Availability ............................................................ 8-30 9 Demand Management Measures ..................................................................................... 9-1 9.1 Introduction ............................................................................................................... 9-2 9.2 Existing Demand Management Measures for Retailers ............................................. 9-2 9.3 Reporting Implementation ......................................................................................... 9-6 10 Plan Adoption, Submittal, and Implementation ........................................................... 10-1 10.1 Completed Steps for UWMP and WSCP ............................................................. 10-2 10.2 Plan Submittal ..................................................................................................... 10-3 10.3 Public Availability ................................................................................................. 10-3 10.4 Amending an Adopted UWMP or WSCP ............................................................. 10-3 References ........................................................................................................................ REF-1 Appendix A DWR Tables ...................................................................................................... A Appendix B Delta Plan ......................................................................................................... B Appendix C Public Hearing Notices ...................................................................................... C Appendix D Adoption Resolution .......................................................................................... D Appendix E 60 Day Notification Letters ................................................................................ E 589
City of OntarioTable of Contents
2025 Urban Water Management Plan | iv
Appendix F Chino Basin Judgement .................................................................................... F Appendix G City of Ontario 2023 Local Hazard Mitigation Plan............................................. G Appendix H San Bernardino County Multi-Jurisdictional Hazard Mitigation Plan ................... H Appendix I DWR Checklist ....................................................................................................... I 590
City of OntarioList of Figures
2025 Urban Water Management Plan | v
LIST OF FIGURES Figure 3-1- City of Ontario Service Area.................................................................................. 3-3 Figure 3-2- Annual Precipitation from 1999-2025 .................................................................... 3-4 Figure 6-1- Chino Basin Boundary Area .................................................................................. 6-3 Figure 6-2- Location of CDA Facilities ..................................................................................... 6-8 Figure 6-3- Location of IEUA Regional Water Recycling Plants ............................................ 6-11 Figure 6-4- Ontario Recycled Water Distribution System ...................................................... 6-15 Figure 8-1- Location of Earthquake Faults ............................................................................ 8-23 Figure 8-2- Earthquake Shaking Potential ............................................................................. 8-24 591
City of OntarioList of Tables
2025 Urban Water Management Plan | vi
LIST OF TABLES Table 2-1- Retail Public Water Systems .................................................................................. 2-2 Table 2-2- Plan Identification ................................................................................................... 2-3 Table 2-3- Supplier Identification ............................................................................................. 2-3 Table 2-4- Water Supplier Information Exchange .................................................................... 2-4 Table 3-1- Average Monthly Climate Data ............................................................................... 3-5 Table 3-2- SCAG Growth Units & Annual Growth Rates ......................................................... 3-6 Table 3-3- Current and Projected Population .......................................................................... 3-7 Table 3-4- City of Ontario Demographic and Socioeconomic Data .......................................... 3-7 Table 3-5- Ontario Land Use ................................................................................................... 3-9 Table 4-1- 2021-2025 Actual Potable Water Use, AFY ........................................................... 4-3 Table 4-2 - Water Loss Audit Reporting - Retail ...................................................................... 4-4 Table 4-3 - Progress Towards 2028 Water Loss Standard ...................................................... 4-5 Table 4-4 - Total Potable Water Use - Retail ........................................................................... 4-6 Table 4-5- Projected Potable Water Use - Retail ..................................................................... 4-7 Table 4-6- Inclusion in Water Use Projections ......................................................................... 4-8 Table 5-1- SB X7-7 2020 Target Progress .............................................................................. 5-2 Table 6-1- Groundwater Volume Pumped - Retail ................................................................... 6-2 Table 6-2- Wastewater Collected Within Service Area in 2025 .............................................. 6-12 Table 6-3- Wastewater Treatment and End Uses Within UWMP Service Area in 2025 ......... 6-13 Table 6-4- Recycled Water Direct Beneficial Uses - Retail .................................................... 6-17 Table 6-5 - 2020 UWMP RW Projection Compared to 2025 Actual - Retail ........................... 6-18 Table 6-6 - Methods to Encourage Future Recycled Water Use ............................................ 6-19 Table 6-7 - Historical Water Use by Source .......................................................................... 6-22 Table 6-8- 2025 Water Supplies - Retail................................................................................ 6-23 Table 6-9 - Projected Water Supplies - Retail ....................................................................... 6-24 Table 6-10 - Total Utility Approach for Single Water Delivery Products - Energy Reporting .. 6-26 Table 7-1- Water Supply Reliability Assessment - Retail ......................................................... 7-3 592
City of OntarioList of Tables
2025 Urban Water Management Plan | vii
Table 7-2- Normal Year Supply and Demand Comparison - Retail .......................................... 7-4 Table 7-3- Single Dry Year Supply and Demand Comparison - Retail ..................................... 7-4 Table 7-4- Five Consecutive Dry Years Supply and Demand Comparison - Retail .................. 7-5 Table 7-5- Five-Year Drought Risk Assessment - Retail ......................................................... 7-7 Table 8-1- Water Shortage Contingency Planning Levels ....................................................... 8-7 Table 8-2- Demand Reduction Actions .................................................................................. 8-12 Table 8-3- Supply Augmentation and Other Actions (DWR Table 8-3) .................................. 8-19 Table 9-1- Demand Management Measures ........................................................................... 9-2 Table 9-2- IEUA Public Education and Outreach Programs .................................................... 9-5 Table 9-3- City of Ontario Program Participation FY 21-25...................................................... 9-7 593
City of Ontario Acronyms & Abbreviations
2025 Urban Water Management Plan | viii
ACRONYMS & ABBREVIATIONS 1,2,3-TCP 1,2,3-Trichloropropane AB Assembly Bill AF Acre-feet AFY Acre-feet per year ANNUAL ASSESSMENT Annual Water Supply and Demand Assessment AWWA American Water Works Association CBWCD Chino Basin Water Conservation District CCWRF Carbon Canyon Water Recycling Facility CDA Chino Basin Desalter Authority CIMIS California Irrigation Management Information System CITY OR ONTARIO City of Ontario CWC California Water Code DMMS Demand Management Measures DRA Drought Risk Assessment DWR Department of Water Resources DYYP Dry-Year Yield Program ERP Emergency Response Plan ETO Evapotranspiration FEMA Federal Emergency Management Agency FY Fiscal Year GPCD Gallons per capita per day GSP Groundwater Sustainability Plan IEUA Inland Empire Utilities Agency JPA Joint Exercise of Powers Agreement 594
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KWH Kilowatt Hours LEGISLATURE State of California Legislature MCCWL Making Conservation a California Way of Life MCCWL REGULATION Making Conservation a California Way of life Regulation M&I Municipal and Industrial MGD Million Gallons Per Day MWD Metropolitan Water District of Southern California OBMP Optimum Basin Management Program OMC Old Model Colony OR Ontario Ranch PCE Perchloroethylene RP-1 Regional Water Recycling Plant No. 1 RP-2 Regional Water Recycling Plant No. 2 RP-3 Regional Water Recycling Plant No. 3 RP-4 Regional Water Recycling Plant No. 4 RP-5 Regional Water Recycling Plant No. 5 RTP Regional Transportation Plan RRA Risk and Resilience Assessment SAWCO San Antonio Water Company SB Senate Bill SBCFCD San Bernardino County Flood Control District SCAG Southern California Association of Governments SGMA Sustainable Groundwater Management Act of 2014 STATE WATER BOARD State Water Resources Control Board TCE Trichloroethylene 595
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UWMP Urban Water Management Plan UWMP ACT Urban Water Management Plan Act UWUO Urban Water Use Objective VOCS Volatile Organic Compounds WFA Water Facilities Authority WSAP Water Supply Allocation Plan WSCP Water Shortage Contingency Plan WUE Water Use Efficiency 596
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1Introduction This section provides a brief overview of the City of Ontario (City or Ontario) and the purpose of this 2025 Urban Water Management Plan (UWMP). It also describes how the UWMP is organized and its relationship to local and regional planning efforts in which the City is involved.

I N T HIS S E CTI ON Introduction for the City California Water Code UWMP Organization and Lay Description UWMPs in Relation to Other Efforts Funding Eligibility Consistency with the Delta Plan 597
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1.1 Introduction for the City An urban water supplier is defined (pursuant to Section 10617 of the California Water Code (CWC) as: 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 The City is classified as an urban water supplier because it serves more than 3,000 customers (i.e. individual metered accounts) and it supplies more than 3,000 acre-feet of water annually to its customers for municipal purposes. In 1983, the State of California Legislature (Legislature) enacted the Urban Water Management Planning Act (UWMP Act). The law requires an urban water supplier to adopt an UWMP every five years by July 1st , incorporating updated and new information from the five years preceding each update. This UWMP must demonstrate water supply reliability under both normal and drought conditions for a minimum 20-year planning horizon. The UWMP Act applies to wholesale and retail water suppliers. Since the original UWMP Act was passed, it has undergone significant expansion. Prolonged droughts, groundwater overdraft, regulatory revisions, and changing climatic conditions affect the reliability of each water supplier as well as statewide water reliability overseen by DWR, the State Water Resources Control Board (State Water Board), and the Legislature. Accordingly, the UWMP Act has grown to address changing conditions. The current requirements for Urban Water Management Plans are found in Sections 10610-10656 and 10608 of the CWC. In 2018, the Legislature modified the CWC to require a Water Shortage Contingency Plan (WSCP) with specific elements. The WSCP is a document that provides a supplier with an action plan for a drought or catastrophic water supply shortage. CWC 10632 includes manage and mitigate an actual water shortage condition, should one occur because of drought or other impacts on water supplies. The WSCP is a standalone document that can be updated independently of the UWMP, but it can be included as a section of the UWMP or referenced and attached to the 2025 UWMP as an appendix. The WSCP is described in Section 8. DWR provides guidance for urban water suppliers by preparing a UWMP Guidebook 2025 (Guidebook) (Department of Water Resources, 2025), conducting workshops, developing tools, and providing program staff to help water suppliers prepare comprehensive and useful water management plans, implement water conservation programs, and understand the requirements of the CWC. Suppliers prepare their own UWMPs and submit them to DWR. DWR then reviews the plans for completeness in addressing the CWC. DWR submits a report to the Legislature summarizing the status of the plans for each five-year cycle. The Guidebook was used to complete this 2025 UWMP. 598
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The purpose of this UWMP is for Ontario to evaluate long-term resource planning and establish management measures to ensure adequate water supplies are available to meet existing and future demands. The UWMP provides a framework to help water suppliers maintain efficient use of urban water supplies, promote conservation programs and policies, ensure that sufficient water supplies are available for future beneficial use, and provide a response mechanism during drought conditions or other water supply shortages. The UWMP is a valuable planning tool used for multiple purposes, including: Providing a standardized methodology for water utilities to assess their water resource needs and availability. Serving as a resource to the community and other interested parties regarding water supply and demand, conservation, and other water-related information. Providing a key source of information for cities and counties when considering approval of proposed new developments and preparing regional long-range planning documents, such as city and county General Plans. Informing other regional and Statewide water planning efforts, such as Integrated Regional Water Management Plans and the California Water Plan. the public of its plans. The City has planned for adequate water supplies for existing and future demands. In addition to these key components, UWMP has also developed a stand-alone WSCP shortage. 1.2 UWMP Organization and Lay Description The 2025 UWMP is organized as follows: Section 1 Introduction This section provides background information on the UWMP process, new regulatory requirements, and an overview of the information covered throughout the remaining sections. The 2025 UWMP incorporates the California DWR water use and supply tables (standardized tables) for the reporting and submittal of UWMP data. These tables are included within the respective sections of the 2025 UWMP and in Appendix A. Ontarioother planning agencies, eligibility to receive grants and loans administered by the State of California, and demonstration of consistency with the Delta Plan are discussed. Section 2 Plan Preparation This section provides information on the processes used to develop the UWMP, including coordination and outreach efforts, the steps taken to prepare Cityhearing, adopt, submit, and implement the 2025 UWMP. The UWMP is prepared as an individual plan to provide Ontario-specific information, with all data presented on a fiscal year (FY) basis (July 1 through June 30) and water quantities reported in acre-feet (AF) or acre-feet-per-year (AFY). The UWMP also describes Ontario 599
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and retail agencies and the community, as well as its notification process to the cities and county it serves. Section 3 System Description climate, and land uses. Ontario is bounded by the Cities of Chino and Montclair to the west; the Cities of Rancho Cucamonga and Upland to the north; the City of Fontana to the east; and the Cities of Chino and Eastvale to the south. Ontario provides water service to an area with a current population of 184,404. Ontario is projected to have a population of 410,492 by FY 2050. Section 4 Water Use Characterization This section describes and quantifies the current and projected water uses through 2050 within the water service area. Ontario serves potable water to single family, multi family, commercial, industrial, institutional/governmental, landscape, and other customers. In 2025, the City served a total of 32,619 Ontario has submitted all required water loss audits to the state for the past 5 years. Projected water use in 2050 will reach about 55,704 AFY. Section 5 SB X7 Compliance & Future Water Use Efficiency (WUE) Requirements This section describes water use targets and baselines pursuant to the Water Conservation Act of 2009, also known as Senate Bill 7 of Special Extended Session 7 (SBX7-7). SBX7-7 required all water suppliers to increase WUE to decrease per-capita water consumption by 20 percent by the year 2020. The City met its targeted reduction of 196 gallons per capita per day (GPCD). In 2025, the City had a GPCD of 152. New WUE (MCCWL Regulation) supersede SBX7-7 standards. The City plans to implement necessary demand management measures (DMMs) to support meeting the Urban Water Use Objective (UWUO), as described in Sections 5 and 9. Section 6 Water Supply Characterization This section describes and quantifies the current and projected potable and non-potable water suppliesChino Basin, purchased groundwater from Chino Basin Desalter Authority (CDA), imported water from Metropolitan Water District of Southern California (MWD) (through Inland Empire Utilities Agency (IEUA) which is treated by Water Facilities Authority (WFA), groundwater and surface water purchased from SAWCo, and recycled water purchased from IEUA. In 2025, the City supplied a total of 44,031 AFY. The City is projected to supply a total of 66,232 AFY in 2050. Section 7 Water Service Reliability This section describes the water service reliability through 2050 and includes the Drought Risk Assessment (DRA) for the next five years. Ontarioassessment and DRA results indicate that no water shortages are anticipated within the next 600
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25-years under normal, single dry water years, and multiple dry water years. The City expects to meet demands under all water year scenarios. Section 8 Water Shortage Contingency Plan The WSCP details procedures for handling potential shortages affecting member agencies. The plan features Annual Water Supply and Demand Assessment (Annual Assessment) procedures, six water shortage stages with corresponding response actions, and coordination among member agencies. It also includes descriptions of emergency response plans and seismic risk assessments for catastrophic events. Section 9 Demand Management Measures This section describes Cityincluding discussions of specific DMMs. The City is committed to implementing water conservation programs. Some of these initiatives include public education and outreach programs, rebate programs, and a water rate structure tiered to promote water conservation. Section 10 Plan Adoption, Submittal, and Implementation This chapter summarizes the various requirements to adopt and submit a UWMP and WSCP. Details on public hearing dates, notification letters to local agencies, and how to submit or amend a plan are discussed. Notifications were sent to cities, counties, and relevant agencies at least 60 days prior to the public hearing. The 2025 UWMP and WSCP were made available for public review prior to a public hearing held on June 2, 2026. Ontario adopted the UWMP and WSCP and submitted them to DWR and the California State Library within 30 days of adoption. The plan is available online and at Ontarioamending the UWMP or WSCP involve public hearings, adoption, and timely submissions to state and local entities. 1.3 UWMPs in Relation to Other Efforts described in Section 2.3. The City is a member agency of various wholesale agencies including the CDA, IEUA, and the WFA. CDA, IEUA, and WFA have each individually prepared a 2025 provided its 2025 UWMP to CDA, IEUA, and WFA, which includes water use projections in five-year increments for a normal year, a single dry year, and a five consecutive year drought over the next 25 years. The City is a shareholder in, and purchases water from, San Antonio Water Company Budget, the City has an entitlement of 600 AFY with each share equal to 2.035 AF of entitlement. 601
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1.4 UWMPs and Grant or Loan Eligibility For a water supplier to be eligible for a grant or loan administered by DWR, the supplier must have a current UWMP on file that meets the requirements set forth by the CWC. A current UWMP must also be maintained by the supplier throughout the term of any grants or loans received. The City Guidebook to meet eligibility requirements for grants and loans administered by the State and/or DWR. 1.5 Demonstration of Consistency with the Delta Plan for Participants in Covered Actions Ontario and WFA are member agencies of IEUA, who has prepared its own 2025 UWMP and reduced Delta reliance and improved regional self-reliance as described in Appendix B. 602
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2Plan Preparation This section provides information on the processes used to develop the UWMP, including efforts in coordination and outreach. The Citys 2025 UWMP was prepared consistently with the recommended I N T HIS S E CTI ON Basis for Preparing a Plan Regional Planning Coordination and Outreach 603
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2.1 Basis for Preparing a Plan As mentioned in Section 1, the CWC requires the City 2025 UWMP to be submitted to DWR by July 1, 2026. The City . In - Served a population of approximately 184,404 people. - Supplied approximately 32,619 AFY to its customers. - Maintained 40,520 metered connections. Throughout this UWMP, water volume is represented in units of AFY, unless otherwise noted, and data is presented on a FY basis which is July 1 through June 30th of the following year. Required DWR tables presenting this information are provided in Table 2-1, Table 2-2, Table 2-3. tables for the reporting and submittal of UWMP data. The standardized tables are provided within the body of the 2025 UWMP text as well as in Appendix A. The City also submitted the Ontario operates two Public Water Systems (PWS) which are regulated by the State Water Board; one for the drinking water system and one for the recycled water system. Table 2-1 provides the public water system number, the number of municipal connections, and the volume of water supplied in 2025. Table 2-1- Retail Public Water Systems Public Water System Number Public Water System Name Number of Municipal Connections 2025 Volume of Water Supplied 2025 CA3610034 Ontario Municipal Utilities Company 40,520 32,619 AFY 2.2 Regional Planning Although a member of the IEUA Alliance, the City elected to develop an individual UWMP. The City, IEUA, and its member agencies coordinated with each other to complete their UWMPs (see Section 2.3). Table 2-2 pro. 604
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Table 2-2- Plan Identification Select Only One Type of Plan Individual UWMP Regional Urban Water Management Plan (RUWMP) Table 2-3- Supplier Identification Type of Supplier (select one or both) Supplier is a wholesale supplier Supplier is a retail supplier Fiscal or Calendar Year (select one) UWMP Tables are in calendar years UWMP Tables are in fiscal years If using fiscal years provide month and date that the fiscal year begins (mm/dd) 07/01 Units of measure used in UWMP Unit AF 605
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2.3 Coordination and Outreach Ontario coordinated with multiple neighboring and stakeholder agencies as well as the public to prepare the 2025 UWMP. The coordinated efforts were conducted to 1) inform these entities of Ontario3) coordinate planning activities with other related regional plans and initiatives. 2.3.1 Wholesale and Retail Coordination The City is a member agency of CDA, IEUA, and WFA. As indicated in Table 2-4, the City, CDA, IEUA, SAWCo, and WFA, have exchanged supply and demand projections during development of their UWMPs. All UWMPs include water use and supply projections in five-year increments for a normal year, a single dry year, and a five consecutive year drought over the next 25 years. Table 2-4- Water Supplier Information Exchange The retail Supplier has informed the following wholesale supplier(s) of projected water use in accordance with Water Code Section 10631 (h). Wholesale Water Supplier Name Chino Basin Desalter Authority Inland Empire Utilities Agency San Antonio Water Company Water Facilities Authority Metropolitan Water District 2.3.2 Coordination With Other Agencies and the Community The City is a retail water supplier that serves customers in Ontario. The City is required to coordinate the preparation of the UWMP with appropriate agencies in the area, including appropriate water suppliers that share a common source. Therefore, the City coordinated the preparation of its 2025 UWMP with the Chino Basin Watermaster, CDA, Cucamonga Valley Water District (CVWD), Fontana Water Company (FWC), IEUA, Monte Vista Water District (MVWD), MWD, Santa Ana Watershed Project Authority, SAWCo, and WFA. Per Government Code 6066, the public hearing was noticed in the Inland Valley Bulletin newspaper on May 19, 2026, and noticed again on May 26, 2026. The hearing notices are attached as Appendix C. The public hearing was held on June 2, 2026 at the City Council meeting prior to the UWMP and WSCP adoption. In addition, the City maintained a copy of the 2025 UWMP and WSCP in its office and at https://www.ontarioca.gov/ prior to the public hearing. 606
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The Final 2025 UWMP and WSCP were formally adopted by the City Council on June 2, 2026. A copy of the Adoption Resolution is included in Appendix D. A hard copy of the City2025 UWMP and WSCP were sent to the California State Library, DWR (electronically using the WUEdata reporting tool), and all cities and counties within the City of adoption. To fulfill the requirements of Water Code Section 10642 of the UWMP Act, the City made the Final 2025 UWMP available online (https://www.ontarioca.gov/), and at the Citypublic office during normal business hours, for public review within 30 days of adoption. Should the City need to amend the adopted 2025 UWMP or WSCP in the future, the City will hold a public hearing for review of the proposed amendments to the document. The City will send a 60-day notification letter to all cities and counties within the Citythe public. Notification to the public with be published twice in the newspaper, the first notice being a minimum of two weeks prior to the public hearing. Once the amended document is adopted, a copy finalized version will be sent to the California State Library, DWR (electronically using the WUEdata reporting tool), and all cities and counties within the Citywithin 30 days of adoption. The finalized version will also be made available to the public both online (https://www.ontarioca.gov/) and in person at the Citybusiness hours. 2.3.3 Notice to Cities and Counties CWC Section 10621 requires that suppliers notify cities and counties to which they serve water that the UWMP and WSCP are being updated and reviewed. The CWC specifies that this must be done at least 60 days prior to the public hearing. To fulfill this requirement, the City sent letters of notification of preparation of the 2025 UWMP and 2025 WSCP to all cities and counties within the City Copies of letters are included in Appendix E to this UWMP. 607
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3System Description This section describes the Citypopulation demographics, local climate, and land uses.

I N T HIS S E CTI ON General Description Service Area Boundary Map Service Area Climate, Demographics, and Socioeconomics Land Uses 608
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3.1 General Description The City was founded in 1881 and was officially incorporated in 1891. The City is located approximately 35 miles easterly of downtown Los Angeles in the County of San Bernardino. The City is bounded by the Cities of Chino and Montclair to the west; the Cities of Rancho Cucamonga and Upland to the north; the City of Fontana to the east; and the Cities of Chino and Eastvale to the south. area is divided between two districts known as the OMC and Ontario Ranch (OR). The OMC area is mostly composed of residential, commercial, and industrial developments, including Ontario International Airport, whereas the OR area is predominantly an agricultural development with plans to be redeveloped for residential, commercial, industrial, and public uses. Large areas of the OR already have been or are currently undergoing redevelopment. 3.2 Service Area Boundary Maps approximately 49 square miles encompassing most of Ontario. Figure 3-1. 609
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Figure 3-1- City of Ontario Service Area

610
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3.3 Service Area ClimateHistorical climate information was obtained from the National Oceanic and Atmospheric Station 255 Chino collected from 1999 through 2025. On average, the annual total precipitation is 11.24 inches, with most of the precipitation occurring between December and March. Records show that the monthly average precipitation ranges from 0.02 inches in June to 2.87 inches in February. The annual average total evapotranspiration (ETo) is 49.97 inches. The highest ETo is experienced between April and September, with the peak occurring in July.monthly high temperature ranges from about 66.4 degrees Fahrenheit (°F) in December to 94.4 °F in August, with an average annual temperature of 66.5°F. Table 3-1 shows the average monthly climate data.Figure 3-2 shows the annual precipitation from 1999 through 2025 and illustrates which years fall above or below the annual average precipitation for this period. As shown by this figure, 2018 was the driest year since 2015 (the peak of the most recent drought), making water management more critical to ensure communities are prepared for the next drought. Figure 3-2- Annual Precipitation from 1999-2025 051015202530
Total Yearly PrecipitationAverage Yearly Precipitation
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Table 3-1- Average Monthly Climate Data MONTH AVERAGE TEMPERATURE (ºF) AVERAGE PRECIPITATION (INCHES) AVERAGE ETO (INCHES) January 55.7 2.15 1.97 February 56.2 2.87 2.47 March 59.4 1.61 3.76 April 63.0 0.75 4.74 May 67.5 0.29 5.22 June 73.2 0.02 6.0 July 79.1 0.06 6.74 August 80.0 0.09 6.48 September 77.0 0.12 4.93 October 69.5 0.44 3.51 November 61.3 0.82 2.36 December 54.9 2.02 1.79 MONTHLY AVERAGE: 66.5 0.93 4.16 SOURCES: Historical average monthly precipitation and temperature information was obtained from the National Oceanic and Atmospheric Administration (https://search.usa.gov/search?utf8=%E2%9C%93&affiliate=noaa.gov&query=ontario+ca) from 1999 through 2025 (for Ontario International Airport). Historical monthly average ETo information was obtained from the CIMIS (http://wwwcimis.water.ca.gov) and is based on data collected from Station 255 (Chino). Changes in climatic conditions may have an impact on water demand and supplies as discussed in Sections 4.4 and 6.9. sources may be impacted by climate change, and the proactive actions the District and other local/regional water managers may take to address the potential climate change on water supplies and demand is provided in Sections 6 and 7. 612
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3.4 Service Area Population and Demographics Southern California Association of Governments (SCAG) develops demographic and growth forecasts for the 2025 Connect SoCal Regional Transportation Plan (RTP) (Governments, 2024), including projected population, households, and employment in 2019, 2035, and 2050 across approximately 13,062 transportation analysis zones (TAZs) in the SCAG region. SCAG publishes jurisdiction and TAZ-level data as GIS shapefilesperfectly with city boundaries, the TAZ-level projection data posted by SCAG (https://scag.ca.gov/data-tools-forecasting) is intersected with the GIS shapefile of water service area in order to clip the data shown in Table 3-2. Estimated growth units within supplier service areas are also shown in Table 3-2. Forecasts are based on land use data, the 2020 Census, and Cycle 6 Regional Housing Needs Assessment (RHNA), and are refined through local review, incorporating land use and zoning information, input from planners, and coordination with local and regional land use authorities. Table 3-2- SCAG Growth Units & Annual Growth Rates 2019 2035 2050 Population Projection (SCAG) 171,027 197,365 236,911 Annual Growth Rate (Calculated) - 0.90% 1.22% Employment Projection (SCAG) 120,101 160,362 182,494 Annual Growth Rate (Calculated) - 1.82% 0.87% Households Projection (SCAG) 49,361 75,550 94,274 Annual Growth Rate (Calculated) - 2.70% 1.49% shown in Table 3-3 are from, Ontario 2025 Water Master Plan (AKM Consulting Engineers, January 2026). 613
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Table 3-3- Current and Projected Population POPULATION SERVED 2020 2025 2030 2035 2040 2045 2050 TOTAL: 175,297 184,404 210,602 236,800 252,950 269,100 410,492 Source: Ontario 2025 Water Master Plan (AKM Consulting Engineers, January 2026) Demographic and socioeconomic data for Ontario are reported in Table 3-4. Table 3-4- City of Ontario Demographic and Socioeconomic Data Race and Ethnicity Hispanic or Latino 67% White 12% Black or African American 6% American Indian and Alaska Native 1% Asian 12% Native Hawaiian and Pacific Islander <1% Other or Multiple Races 3% Income and Households Median Household Income $94,020 Percent Living at or Below Poverty Line 10% Percent of households owning home 60% Vacancy Rate 4% Sources 2020 Decennial Census 2024 American Community Survey 1-Year Estimates Accessed at: Data.census.gov/profile/Ontario_City,_California 3.5 Land Uses within Service Area The City reviewed the current and projected land uses within its service area during the preparation of this 2025 UWMP. Information regarding current land uses is included in Table 3-5 from the Master Plan. 614
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Ontario anticipates continued population and housing growth through buildout under The City of Ontario Plan, with growth occurring in a phased manner that largely reinforces existing land use patterns. Residential growth includes both singlefamily and multifamily housing and is directed toward established neighborhoods, mixeduse areas, and infill locations, while employmentgenerating uses are concentrated in designated activity centers, corridors, and employment districts. Overall, The City of Ontario Plan emphasizes accommodating future population and housing growth through efficient land use, compatible development, and intensification in targeted areas of the City, rather than broad outward expansion or fundamental changes to land use types. Tto increase as discussed in Section 3.4. A discussion of the existing and projected water uses land uses, is provided in Section 4.2. 615
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Table 3-5- Ontario Land Use Land Use Description Original Model Colony (Acres) Ontario Ranch (Acres) Total (Acres) % of Total Rural Residential 450 - 450 1.4% Low Density Residential 4,541 559 5,100 15.9% Low-Medium Density Residential 148 10 158 0.5% Medium Density Residential 258 104 362 1.1% High Density Residential 438 15 453 1.4% Mobile Home 202 - 202 0.6% Total Residential 6,038 688 6,726 21.0% Commercial 57 - 57 0.2% General Commercial 263 - 263 0.8% Neighborhood Commercial 144 11 155 0.5% Business Park 115 - 115 0.4% Office 646 - 646 2.0% Total Commercial 1,225 11 1,236 3.9% Industrial 2,179 639 2,818 8.8% Manufacturing 1,746 - 1,746 5.5% Warehousing 1,851 64 1,915 6.0% Total Industrial 5,776 703 6,479 20.2% Mixed Use 497 39 536 1.7% School 448 57 505 1.6% Hospitality 84 - 84 0.3% Public Facilities 215 9 224 0.7% Open Space Recreational 759 42 801 2.5% Agriculture 175 4,928 5,103 15.9% Landfill 192 - 192 0.6% Airport/Transp/Utilities 2,669 344 3,013 9.4% Street/Parking 262 3 265 0.8% Not Developed 893 537 1,430 4.5% Right-of-Way 4,589 839 5,428 17.0% Total Other 10,783 6,798 17,581 54.9% Grand Total 23,822 8,200 32,022 100% Source: (AKM Consulting Engineers, January 2026) 616
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4Water Use Characterization This section describes and quantifies the Cityand future water use through 2050.

I N T HIS S E CTI ON Non-Potable Versus Potable Water Use Past, Current, and Projected Water Use by Sector Water Use for Lower Income Households Climate Change Considerations 617
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4.1 Non-Potable Versus Potable Water Use Section 4 addressed separately in Section 6.2.2 and a summary is provided in Table 6-5. Raw water is not served by the City and is not applicable. 4.2 Past, Current, and Projected Water Use by Sector The City provides potable water and non-potable water to its customers as described in further detail in the following sections. 4.2.1 Water Use Sectors Listed in Water Code Water suppliers are required to identify water uses to the extent that records are available, for each of the applicable water use sectors identified in CWC 10631(d). The City primarily serves potable water to customers, though it does supply a small amount of recycled water. Recycled water uses are described in Section 6.2.2. The City serves the following water uses: Single-Family Single family residential customers are typically on a lot with a free-standing building containing one dwelling unit that may include a detached secondary dwelling. Multi-family Multi-family residential customers are typically multiple dwelling units within one building or several buildings within one complex. Commercial Commercial users are defined as water users that provide or distribute a product or service. Institutional/Governmental Institutional water customers are typically public services, such as higher-education institutions, schools, courts, churches, hospitals, government facilities, and nonprofit research institutions. Landscape The City tracks the water use for landscape irrigation. Industrial Industrial customers typically manufacture or process materials. Other The City has accounts for other uses, which include hydrant accounts. 618
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Distribution System Water Losses Distribution system losses represent the potable water losses from the pressurized water distribution system and water storage facilities, up to the point of delivery to the customers. Additional information is discussed in Section 4.2.4. 4.2.2 Past Water Use potable water use by customer class from 2021-2025 is shown in Table 4-1. Historical demand trends have been considered as part of projected water use in Section 4.2.5 and water service reliability in Section 7. Table 4-1- 2021-2025 Actual Potable Water Use, AFY Use Type 2021 2022 2023 2024 2025 % Average Single Family 13,747 13,274 11,589 11,549 12,729 39.6% Multi Family 5,512 5,467 5,056 5,039 5,484 16.7% Commercial 4,907 5,081 4,701 4,528 4,789 15.1% Industrial 2,162 2,324 2,111 2,104 2,267 6.9% Institutional/Governmental 645 664 550 510 666 1.9% Landscape 5,738 5,510 4,263 4,102 4,909 15.5% Other 345 436 364 339 510 1.3% Losses 913 915 808 843 1,265 3.0% TOTAL: 33,969 33,671 29,442 29,015 32,619 4.2.3 Distribution System Water Losses Distribution system water losses are the physical potable water losses from the point of water result from either real losses or apparent losses, examples of which include: aging infrastructure, leaks, seepage, theft, metering inaccuracies, data handling errors, and other causes. Addressing water losses can increase water supplies and recover revenue. The City monitors its water loss and prepares an annual American Water Works Association (AWWA) 619
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Water Audit to estimate the volume of water loss. The City has submitted all required water loss audits to the State, as shown in Table 4-2. Table 4-2 - Water Loss Audit Reporting - Retail Public Water System ID # Reported in Table 2-1R Reporting Period Submitted to DWR Water Loss Audit Program CA3610034 2020 Yes 2021 Yes 2022 Yes 2023 Yes 2024 Yes DWR NOTES: 2020 AWWA: CY2020 Ontario Validated WLA.xlsx 2021 AWWA: 2021_WLAOntarioValidated.xlsx 2022 AWWA: 2022 Ontario Water Loss Audit v6.0_Final.xlsx 2023 AWWA: 2023_WLAOntario Audit FWAS v6.0_validated.xlsx 2024 AWWA: 20251204_2024_WLAOntario Audit FWAS v6.0_VALIDATED AB_JN.xlsx CWC Section 10608.34 required the State Water Board to develop water loss performance standards for urban retail water suppliers to minimize water waste through system leaks. Water loss performance standards were developed through a rulemaking that became effective in 2023. Under the regulations, each supplier will be required to comply, by 2028, with an individualized volumetric water loss standard based on real loss, using the economic model Real loss is the physical loss of water from water distribution systems, as opposed to apparent losses, which are revenue losses due to meter inaccuracies, billing errors or unauthorized consumption. A water loss audits from 2017 2020. The real water loss performance standard is based on gallons per service connection per day (gpscd), or gallons per mile of pipe per day (gpmd), depending on how the supplier reports real loss. Post-2028 compliance with volumetric water loss from the preceding three years, with an allowed variation of 5 gallons per connection per water loss standard. Apparent loss standards are equal to the baseline apparent loss and compliance is evaluated at the same time as compliance with the Real Water Loss Performance Standard. 620
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Although the compliance period has not yet started, CWC Section 10631 (d)(3)(C) requires water suppliers to provide data in the UWMP to show whether the supplier met its State Water Board water loss performance standard. Based on data released by the State on January 30, 2026, the City24.0 gpscd and the real water loss standard is 24.0 gpscd, and the apparent loss standard is the baseline of 8.2 gpscd. As shown in Table 4-3, based on the most recent water loss audit from 2024, the City has not yet met the real water loss performance standard, but is working toward that goal by 2028 and continuing to meet this standard. Ontario plans to implement water loss control programs to ensure the real water loss performance standard can be met. Section 9 discusses the City Table 4-3 - Progress Towards 2028 Water Loss Standard Public System ID # Reported in Submittal Table 2-1R CA3610034 Did the Water Board Calculate a Water Loss Standard for this Public System? Yes 2028 Real Water Loss Standard per Unit per day 24.0 Units for Real Water Loss Standard gpscd Number of Units 40,420 Volume of Total Real Water Loss (from AWWA Water Loss Audit) 1,344 2025 or Most Recent Year Real Water Loss per Unit per Day 29.7 2028 Apparent Water Loss Standard per Unit per Day 8.2 Units for Apparent Water Loss gpscd Number of Connections 40,420 Volume of Total Apparent Loss (from AWWA Water Loss Audit) 155 2025 or Most Recent Year Apparent Water Loss per Unit per Day 3.4 621
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4.2.4 Current Water Use In 2025, the City provided water to its customers as shown in Table 4-4. Table 4-4 - Total Potable Water Use - Retail Use Type Level of Treatment When Delivered 2025 Volume Single Family Potable 12,729 Multi Family Potable 5,484 Commercial Potable 4,789 Industrial Potable 2,267 Institutional/Governmental Potable 666 Landscape Potable 4,909 Other Potable 510 Distribution Water System Losses 1,265 TOTAL: 32,619 4.2.5 Projected Water Use OntarioFuture water system demands were developed by estimating increases associated with planned development, redevelopment, and densification throughout Future water demands were developed for using a combination of existing meter data and planning-level projections from specific plans, The City of Ontario Plan 2050 (TOP 2050) and recent Accessory Dwelling Unit (ADU) growth. Existing production and purchase data from FY 2021-2022 was used to represent the water demand of existing customers and to develop water unit demand factors for future developments. FY 2022 was used because it was the most recent data not affected by drought or wet weather conditions. While future potable water demands could be reduced by recycled water conversions and ongoing conservation efforts, this study conservatively does not reduce projected demands to 622
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ensure reliable service under all potential future conditions. Demand projections are based on historical production and purchase trends, which already reflect the effects of recycled water use, conservation programs, drought regulations, and other recent influences. The Water Master Plan did not provide demand projections per customer type. To split the demand projections into customer types, the average percentage of total consumption by each customer type from 2020-2025 was applied to the total demand projections in the Water Master Plan. Demand projections through 2050 are presented in Table 4-5, with 2040-2050 being equivalent after buildout is reached in 2040. Table 4-5- Projected Potable Water Use - Retail Projected Water Use Use Type Additional Description Level of Treatment When Delivered 2030 2035 2040 2045 2050 Single Family Potable 17,251 18,082 22,072 22,072 22,072 Multi-Family Potable 7,285 7,636 9,321 9,321 9,321 Commercial Potable 6,585 6,902 8,425 8,425 8,425 Institutional/ Governmental Potable 833 873 1,065 1,065 1,065 Industrial Potable 3,009 3,154 3,850 3,850 3,850 Landscape Potable 6,726 7,050 8,606 8,606 8,606 Other Potable 547 573 700 700 700 Distribution System Water Losses 1,302 1,365 1,666 1,666 1,666 Total 43,537 45,634 55,704 55,704 55,704 Notes: Projected water uses are equal for years 2040 through 2050 because the City anticipates buildout to occur in 2040. 623
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4.3 Water Use for Lower Income Households Senate Bill (SB) 1087 requires that water use projections in a UWMP include projected water use associated with single-family and multi-family residential housing for lower-income households, as identified in the housing elements of any city, county, or city and county within housing needs for each jurisdiction over the applicable planning period. SCAG adopted the 6th Cycle RHNA Allocation Plan, which covers the planning period from October 2021 through October 2029 (Southern California Association of Governments, 2021)Allocation Plan and are used in the determination and allocation of housing needs Housing Element, including lower-income housing. TOP 2050 conservatively plans for buildout development, thus it exceeds the amount of housing identified in RHNA and Element. The projected demands in this UWMP represent water use from all future growth through buildout and are inclusive of water use for lower income households. Table 4-6- Inclusion in Water Use Projections Are Future Water Savings Included in Projections? Yes Are Lower Income Residential Demands Included in Projections? Yes 4.4 Climate Change Considerations Future demand and use of supply sources may be affected by climate change. more frequent, severe, and prolonged droughts could lead to not only less surface water available, but also exacerbating ongoing stressors in groundwater basins across the (State of California Department of Water Resources, 2021) Higher temperatures decrease the amount of water available for groundwater recharge and for surface water sources while increasing water use, especially for outdoor use. Reductions in future supply due to impacts associated with climate change were considered as part of the projected supply discussed in Section 6 and Section 7. Impacts on future water use patterns due to climate change factors were considered as part of the demand projections provided in Section 4. 624
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5SB X7-7 Compliance & Future Water Use Efficiency Requirements This section describes compliance with the Water Conservation Act of 2009, also known as SBX7-7. The section demonstrates compliance with the 2020 SBX7-7 target and discusses future WUE requirements. I N T HIS S E CTI ON Compliance and Future Water Use Efficiency Requirements 625
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5.1 Compliance and Future Water Use Efficiency Requirements SBX7-7 was incorporated into the UWMP Act in 2009 and required that all water suppliers increase WUE with the overall goal to decrease per-capita water consumption within the state by 20 percent by the year 2020. SBX7-7 required DWR to develop certain criteria, methods, and standard reporting forms through a public process that water suppliers could use to establish their baseline water use and determine their water conservation targets. SBX7-7 and DWR's Methodologies for Calculating Baseline and Compliance Urban Per Capita Water Use (State of California Department of Water Resources, 2021) specify methodologies for determining the baseline water demand, 2015 interim urban water use target and the 2020 urban water use target for the City as described in the 2020 UWMP. This section also demonstrates that the City achieved its 2020 water use target. Table 5-1 below establishes the CityCity met its 2020 target. Most recently, in 2025, with an annual gross water use of 32,619 AFY and population of 184,404, the water use was 158 GPCD, which is well below the 2020 target of 196 GPCD. Table 5-1- SB X7-7 2020 Target Progress 2020 Target GPCD 2020 Actual GPCD Did Supplier Achieve Target? 196 161 Yes New WUE standards from the MCCWL Regulation supersede SBX7-7 standards. In 2018, two policy bills were enacted by the California Legislature, Assembly Bill 1668 (AB1668, Friedman) Conservation Legislationlegislation, and subsequent adoption of the MCCWL Regulation, each urban retail water supplier must comply with its UWUO. DWR and the State Water Board have developed a reporting framework for calculating the UWUO and compliance annually with efficiency standards becoming increasingly stringent through 2040. The City plans to implement necessary DMMs (see Section 9) to support meeting the UWUO. DMMs and UWUO compliance planning enhance resiliency for drought and other water shortage conditions as described in Sections 7, 8, and 9. 626
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6Water Supply Characterization This section describes and quantifies the Citycurrent and projected potable and non-potable water supplies. It provides a narrative description of each supply source and quantifies the supply availability for each supply source identified. I N T HIS S E CTI ON Water Supply Analysis Overview Water Supply Characterization Energy Intensity 627
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6.1 Potable Water Supply Sources The City uses Chino Basin groundwater from City-owned wells, desalinated brackish Chino Basin groundwater purchased from the CDA, imported water from WFA, and water purchased from SAWCo to meet its potable demands. The City also purchases recycled water from IEUA to meet some irrigation and other non-potable demands. The following sections describe each water source. Table 6-1 shows production for the last five years from Chino Basin. Table 6-1- Groundwater Volume Pumped - Retail Groundwater Type Potable or Non-Potable Location or Basin Name 2021 2022 2023 2024 2025 Alluvial Basin Potable Chino Basin 20,281 18,628 16,385 14,345 18,672 Total: 20,281 18,628 16,385 14,345 18,672 6.1.1 Chino Basin Groundwater 6.1.1.1 Description The Chino Basin is located within the Upper Santa Ana Valley within San Bernardino County and is bounded on the east by the Rialto-Colton fault; on the southeast by the contact with impermeable rocks forming the Jurupa Mountains; on the south by impermeable rocks of the Puente Hills and by the Chino fault; on the northwest by the San Jose fault; and on the north by the impermeable rocks of the San Gabriel Mountains and by the Cucamonga fault. The location of the Chino Basin is provided in Figure 6-1. The surface area of the Chino Basin is approximately 154,000 acres (or 240 square miles). The San Antonio Creek and Cucamonga Creek drain the Chino Basin area southward and flow into the Santa Ana River. Pursuant to DWR Bulletin 118 (for Basin Number 8-2.01), the Chino Basin is a subbasin of the Upper Santa Ana Valley Groundwater Basin and has a total storage capacity of approximately 5,000,000 AF. The water-bearing units in the Chino Basin include Holocene and Upper Pleistocene alluvium. This Holocene alluvium consists mainly of alluvial-fan deposits, with maximum thickness of 150 feet that are most coarse in and near the mouths of the canyons and are finer away from canyon mouths in the southern part of the Chino Basin. The Pleistocene alluvium is exposed mainly in the northern part of the subbasin and supplies most of the water to wells located within the Chino Basin. The Pleistocene alluvium is about 600 to 700 feet thick throughout most of the Chino Basin. The alluvium contains interfingering finer, alluvial-fan deposits and coarser, fluvial deposits. 628
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Figure 6-1- Chino Basin Boundary Area
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6.1.1.2 Sustainable Groundwater Management Act Pursuant to the Sustainable Groundwater Management Act of 2014 (SGMA), the Chino Basin was named as an adjudicated groundwater basin and is exempt from the requirements of developing a groundwater sustainability plan (GSP) and subsequently was designated a very-low-In compliance with SGMA, the Chino Basin Watermaster submits its Annual Report to DWR. 6.1.1.3 Adjudication The Chino Basin was adjudicated under the Chino Basin Judgment, entered on January 27, 1978 by the Superior Court for the County of San Bernardino. A link to the Chino Basin Judgment is provided in Appendix F. The Chino Basin Watermaster was created by the Judgment to administer the provisions of the Judgement as an arm of the Court. The Chino Basin Judgment originally established a Safe Yield for the Chino Basin of 140,000 AFY. The Safe Yield is typically recalculated every 10 years and is defined in the Chino Basin -term average annual quantity of ground water (excluding replenishment of stored water but including return flow to the Basin from use of replenishment or stored water) which can be produced from the Chino Basin under conditions of a particular year without Pursuant to the most recent Safe Yield reset effective in 2020, the Safe Yield for the Chino Basin is currently 131,000 AFY (effective July 1, 2020 to June 30, 2030). In April 2017, a Court Order regarding the Safe Yield of the Chino Basin (2017 Safe Yield Court Order) was issued, which caused the Safe Yield to be recalculated in 2025. The 2017 Safe Yield Court Order also required changes to the Safe Yield Reset methodology. The methodology was updated in 2022, and the 2025 Safe Yield Reset process began in 2023. The 2025 Safe Yield Reset is not final, so for purposes of this UWMP, the Safe Yield for the Chino Basin is based on the currently effective value of 131,000 AFY. Additional information on the 2025 Safe Yield Reset is available on the Chino Basin Watermaster website (https://www.cbwm.org/pages/syrm/). 1. Overlying Agricultural Pool (farmers, State of California, and other minimal producers) 2. Overlying Non-Agricultural Pool (businesses and industries) 3. Appropriative Pool (cities, agencies, and other water suppliers, including Ontario) As of July 2020, the Safe Yield is allocated among these three pools at 82,800 AFY to the Overlying Agricultural Pool, 7,366 AFY to the Overlying Non-Agricultural Pool, and 40,834 AFY to the Appropriative Pool. The portion of the Safe Yield allocated to the Appropriative Pool is called the Operating Safe Yield (OSY). The City is a member of both the Overlying Non-Agricultural Pool and the Appropriative Pool. Per the Judgment, the City has appropriative rights to 20.742 percent of the OSY. With an OSY 630
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purchased and has rights to 3,921 AF of Overlying Non-Agricultural Pool water as of June 30, 2024. Appropriators who are Parties to the Chino Basin Judgment are authorized to produce groundwater in excess of their rights. For any groundwater produced in excess of their rights, Appropriators pay assessments to the Chino Basin Watermaster, which are used to purchase water to replenish the Chino Basin. The Chino Basin Watermaster purchases water from MWD through IEUA and/or TVMWD, on behalf of the Parties, to replenish the Chino Basin. Occasionally, Watermaster has purchased water from storage accounts from parties within the Chino Basin. In addition to the water rights described above, the City has rights to groundwater held in the Chino Basin as described below: Land Use Conversion When land is converted from agricultural to urban use, water rights are permanently transferred from the Overlying Agricultural Pool to the Appropriative Pool. As of FY 24/25, the City receives 6,531 AFY of pumping rights from land use conversions. Land use conversions assign the increase in Appropriative Pool rights to the party whose sphere of influence includes the converted land, so the OR development will lead to an increase in appropriative rights for the City in the future. Annual Unused Overlying Agricultural Pool Rights The Chino Basin Watermaster also reallocates the unused portion of the Chino Basin Safe Yield from the Overlying Agricultural Pool to the Appropriative Pool membersrights in any year. These transfers are permanent if agricultural land has been converted to non-agricultural use (described above), or temporary if agricultural pool extractions are less than their share of the Safe Yield. In FY24/25, 21,487 AFY of rights have been reallocated from the Overlying Agricultural pool to the Appropriative Pool that were not claimed as part of a permanent land conversion, resulting in 4,457 AFY in additional rights for Ontario. Because these rights are not permanent Fontana Recycled Water Rights The City has a long-term contract, expiring in 2031, to purchase up to 3,000 AFY of recharged recycled water rights from the City of Fontana. The City of Fontana does not operate a water system and therefore cannot use the water rights associated with their recycled water recharge credit. The amount purchased by the City each year will vary. Groundwater Storage Accounts The City has rights to store water in the Chino Basin through both the Appropriative and Overlying Non-Agricultural Pools. The City holds water in both Excess Carryover accounts and Local Supplemental accounts. As of June 30, 2024, the City has 136,940 AF in storage pursuant to Appropriative rights and 0 AF in storage pursuant to Overlying Non-Agricultural rights. Storage account mechanisms are described in Section 6.1.1.4. 631
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6.1.1.4 Management Chino Basin Optimum Basin Management Program (OBMP) In 2000, the Chino Basin Watermaster developed the Chino Basin OBMP. The OBMP was developed in a collaborative process that identified the needs of the stakeholders, described the physical state of the basin, defined a set of management goals, identified impediments to these goals, and established a series of actions that would remove these impediments and achieve the management goals. The goals identified in the OBMP included: (1) Enhance Basin Water Supplied; (2) Protect and Enhance Water Quality; (3) Enhance Management of the Basin; and (4) Equitably Finance the OBMP. The OBMP defines nine Program Elements which were incorporated into the OBMP Implementation Plan as part of the Court-ordered Peace Agreement (2000): Program Element 1 - Develop and Implement Comprehensive Monitoring Program Program Element 2 - Develop and Implement Comprehensive Recharge Program Program Element 3 - Develop and Implement a Water Supply Plan for Impaired Areas Program Element 4 - Develop and Implement Comprehensive Groundwater Management Plan for Management Zone 1 Program Element 5 - Develop and Implement Regional Supplemental Water Program Program Element 6 - Develop and Implement Cooperative Programs with the Regional Board and Other Agencies to Improve Basin Program Element 7 - Develop and Implement Salt Management Plan Program Element 8 - Develop and Implement Groundwater Storage Management Program Program Element 9 - Develop and Implement Storage and Recovery Programs the Parties that allow the implementation of the OBMP and guide the management of the Chino Basin, including the construction and operations of the Desalters, hydraulic control of the Basin, groundwater production and replenishment for the Desalters, yield accounting and recharge. Chino Basin Storage Management Plan The Peace Agreement (2000) establishes rules and regulations, standard storage agreements, and related forms for storage in the Chino Basin. Since 2000, Chino Basin Watermaster administers groundwater storage in the Chino Basin pursuant to the storage management plan described in Program 8 of the 2000 OBMP. There are five types of storage accounts: Excess Carryover, Local Supplemental-Recycled, Local Supplemental-Imported, Pre-2000 Quantified Supplemental, and Storage and Recovery. Excess Carryover account (Safe Yield for Overlying Non-Agricultural Pool Parties and OSY for Appropriative Pool Parties) and Basin Water purchased or transferred from other Parties. 632
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Local Supplemental Water account (recycled and imported) includes any imported and/or recycled water that is recharged by a producer and similar water acquired from other Parties. Pre-2000 Quantified Supplemental Account (same function as Local Supplemental Water Account) Storage and Recovery account holds Supplemental Water (imported or recycled) and is intended to provide a broad and mutual benefit to the Parties of the Judgment. The City has Excess Carryover and Local Supplemental accounts. The City also participates in the DYY Program, which is currently the only Storage and Recovery Program in the Chino Basin. Dry Year Yield Program -Year Yield Program (DYYP) is the only active Storage and Recovery Program in Chino Basin. This program is a water exchange as discussed in Section 6.5.1. Groundwater Clean-up Groundwater in areas of the Chino Basin is currently contaminated with Perchlorate and Volatile Organic Compounds (VOCs), including 1,2,3-Trichloropropane (1,2,3-TCP), trichloroethylene (TCE), and perchloroethylene (PCE). In addition, nitrates and TDS concentrations in areas of the Chino Basin exceed drinking water quality standards. Wellhead treatment is necessary in these areas to allow delivery of the groundwater for potable purposes. 6.1.2 Chino Basin Desalter Authority On September 25, 2001, CDA was formed under a Joint Exercise of Powers Agreement (JPA) to remove salts from brackish groundwater extracted from the lower Chino Basin. The area which receives water supplies from CDA is 304 square miles. A map showing CDA Desalter facilities and associated wells is provided in Figure 6-2. CDA removes salts from brackish groundwater extracted from the lower Chino Basin through the Chino I and II Desalter facilities. The Chino I Desalter is located in the City of Chino and commenced operation in 2001 and was expanded in 2005 to have a total capacity of 14.2 MGD. The Chino I Desalter includes reverse osmosis, ion exchange, and air stripper treatment for treating brackish water and removing nitrate and volatile organic chemicals (VOCs). The Chino II Desalter is located in Jurupa Valley and began operation in 2006 and was expanded in 2011 and again in 2017 to have a total capacity of 33 MGD. The Chino II Desalter includes reverse osmosis and ion exchange treatment for treating brackish water and removing nitrate. Following the expansion, CDA constructed the Concentrate Reduction Facility in 2017, which utilizes chemical softening to remove the limiting foulants (specifically, calcium and silica) from the reverse osmosis concentrate. CDA completed the South Archibald Plume Project in 2021. The project added improvements to the Chino II system, which included a new 2,000 gpm well to extract groundwater from the plume, construction of a transmission pipeline to convey impacted groundwater to the Desalter, and treatment of high TCE groundwater reverse osmosis (RO) system, and a new air stripper system. 633
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Figure 6-2- Location of CDA Facilities
Source: (Chino Basin Optimum Basin Management Program, 2018) Chino Hills, City of Norco, City of Ontario, IEUA, Jurupa Community Services District, Santa Ana River Water Company, and Western Municipal Water District which provide water service within Riverside County and San Bernardino County. The OBMP included a long-term goal to produce 40,000 AF from the Chino Basin annually for the purpose of groundwater cleanup and 634
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hydraulic control of contaminant migration into the Santa Ana River, and to prevent loss of beneficial water for use in the basin. The member agencies have contract entitlements to receive a total of 35,200 AFY of treated water from CDA , meaning they must purchase this volume of water whether or not they use it. A portion of the production is in-lieu of those CDA member agencies producing an equal amount of groundwater from their own groundwater wells using their individual water rights. An the Chino Basin Judgment, a total of 200,000 AF was authorized for controlled overdraft between the period of 1978 through 2017. In 2007, the Peace II Agreement was adopted to establish measures for achieving hydraulic control of the Chino Basin. One of the measures put forth included increasing the authorized controlled overdraft to 600,000 AF. This is a 400,000 AF increase from the original 200,000 AF authorized in the Chino Basin Judgment and is available for utilization until December 31, 2030 per the Peace II Agreement. For the balance of the production, the Chino Basin Watermaster levies an annual Replenishment Assessment to agencies is responsible to pay a Replenishment Assessment for their purchases in excess of their respective water rights allocated to the program. 6.1.3 Water Facilities Authority The City purchases treated, imported surface water from WFA through an Installment Purchase Agreement first signed in 1985 and last revised in 1997. On February 19, 1980, WFA was formed under a JPA to acquire and construct facilities to supply and distribute potable water to Upland, and Monte Vista Water District. The area which receives water supplies from WFA is approximately 148 square miles. WFA purchases untreated imported water from MWD through IEUA. WFA owns and operates the Agua de Lejos Treatment Plant located in the City of Upland. The Agua de Lejos Treatment Plant is a conventional surface water treatment facility that treats and disinfects imported water supplies. The Agua de Lejos Treatment Plant began operating in 1988 and has a treatment capacity of 81 million gallons per day (MGD). 6.1.4 San Antonio Water Company The City purchases water from the the City and SAWCo which delivers domestic and irrigation water to a variety of shareholders. These shareholders include most residents of San Antonio Heights (an unincorporated area of San Bernardino County), the Cities of Upland and Ontario, Monte Vista Water District, the United States Forest Service, the San Bernardino County Flood Control 635
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District (SBCFCD), local golf courses, rock quarries, and grove irrigators. SAWCo is governed by a seven-member Board of Directors that is elected by shareholders at the end of each calendar year. Annual Operating and Capital Improvement Budget for FY 2025, there are 6,178 Active Shares and a total of 6,389 Company Shares (Inactive Shares are those shares currently not utilizing entitlement water). Each Active Share was equal to 2.035 AF of entitlement water from SAWCo, making the total active share entitlement 12,570 AF. The City has an entitlement of 600 AF based on Active Share entitlements. water from the San Antonio Tunnel, and groundwater sources from the Chino Basin, Six Basins, and Cucamonga Basin. Ontario has a 600 AFY entitlement with SAWCo, so supply from this source is expected to remain consistent in the future. A description of the reliability 2025 UWMP. 6.1.5 Surface Water The City does not use surface water in its supply portfolio other than what it purchases through SAWCo. 6.2 Wastewater and Recycled Water 6.2.1 Wastewater Collection, Treatment, and Disposal Wastewater generated by the City is treated by IEUA. IEUA provides sewage utility services to seven contracting agencies including the Cities of Chino, Chino Hills, Fontana, Montclair, Ontario, Upland, and Cucamonga Valley Water District. Wastewater is colincluding 90 miles of regional sewage interceptors. The regional sewer lines deliver wastewater to one or more regional plants owned by IEUA for treatment. IEUA owns and operates five regional water recycling plants: Regional Water Recycling Plant No. 1 (RP1) has a treatment capacity of 44 MGD. RP-2 does not have any liquid treatment processes and does not produce any recycled water. RP-4 has a treatment capacity of 14 MGD. RP-5 has a treatment capacity of 16.3 MGD. Carbon Canyon Water Recycling Facility (CCWRF) has a treatment capacity of approximately 12 MGD. Wastewater is treated through various processes including preliminary screening, grit removal, primary clarification, secondary treatment, tertiary treatment, dechlorinating, solids thickening, anaerobic digestion, and dewatering. With the exception of RP-2, the regional plants can produce tertiarytreated, Title 22quality recycled water. 636
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Figure 6-3 below. use in 2025 and end uses are provided below in Table 6-2 and Table 6-3. Figure 6-3- Location of IEUA Regional Water Recycling Plants IEUA delivers recycled water to retailers (including the City, as discussed in Section 6.2.2) and to Chino Basin recharge basins. Excess water is dechlorinated and discharged to the Santa Ana River. 637
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Table 6-2- Wastewater Collected Within Service Area in 2025 Wastewater Collection Recipient of Collected Wastewater Name of Wastewater Collection Agency Wastewater Volume Metered or Estimated? Volume of Wastewater Collected from UWMP Service Area 2025 Name of Wastewater Treatment Plant (WWTP) and Place ID Number Is WWTP Located Within UWMP Area? IEUA Estimated 14,053 IEUA Carbon Canyon WWRF, Place ID 259184 Yes Total Wastewater Received from UWMP Service Area in 2025: 14,053 Notes: RP-1 and RP-5 are the specific plants described in the row above. 638
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Table 6-3- Wastewater Treatment and End Uses Within UWMP Service Area in 2025 2025 Outcomes of Treated Wastewater Water Recycled Within UWMP Service Area Water Recycled Outside of UWMP Service Area Effluent Discharge that is not a Permitted Recycled Water Use Required Discharge for Instream Flow Wastewater Treatment Plant Name and Place ID Number Does This Plant Treat Wastewater Generated Outside the UWMP Service Area? 2025 Volume of Wastewater Received from UWMP Service Area Total 2025 Volume of Water Treated Volume Volume Volume Volume IEUA Carbon Canyon WWRF, Place ID 259184 Yes 14,053 14,053 11,406 1,026 1,621 Total: 14,053 14,053 11,406 1,026 1,621 Notes: RP-1 is the specific plant described in the row above. 639
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6.2.2 Recycled Water 6.2.2.1 Recycled Water System Background at their five Regional Plants. The City has the right of first purchase of recycled water up to its base entitlement, which is based on the quantity of sewage delivered into the Regional Sewerage System in proportion to the total quantity of wastewater delivered to the Regional Sewerage System from all agencies. The City can also purchase additional surplus recycled water available after other agencies have exercised their rights of first refusal. The City has received recycled water from IEUA since 1972. The City uses recycled water for industrial purposes, landscape irrigation, agricultural irrigation, and goldistribution system is provided in Figure 6-4. The City works closely with IEUA regarding the development of recycled water infrastructure in its service area and the identification of new recycled water users. 640
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Figure 6-4- Ontario Recycled Water Distribution System
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6.2.2.2 Potential, Current, and Projected Recycled Water Uses The City uses recycled water for agricultural irrigation, landscape irrigation, golf course irrigation and industrial purposes. The City plans to increase recycled water use within its service area by expanding the recycled water system to additional parks, schools, nurseries, and commercial landscaping areas not currently using recycled water. The City is in the process of preparing a 2025 Recycled Water Master Plan. Recycled Water Master Plan identified potential recycled water customers within the City based on recycled water use for large-volume irrigation purposes (e.g. municipal parks, fields, golf courses, etc.). Recycled water use factors from the RWMP were applied to the ultimate land uses for these customers to determine the potential ultimate recycled water demands. One project currently in the planning stage that Ontario has evaluated through a feasibility study is the Pure Water Ontario (PWO) initiative. The PWO project is an indirect potable reuse project with the goal of developing a new, reliable water supply and reducing reliance on imported water. The PWO will use recycled water (tertiary treated) from IEUA RP-1 plant and further treat it at a new Advanced Water Purification Facility (AWPF) using micro-filtration, reverse osmosis (RO), ultraviolet light and advanced oxidation process. The AWPF will produce 4,500 acre-feet per year of Title 22 treated water. Brine from the RO process will be disposed of via a pipeline -Reclaimable Water System (NRWS) gravity main on Philadelphia Street. The treated water will be recharged into the underlying Chino Basin via 4-5 subsurface injection wells near RP-1. The locations of the injection wells have yet to be determined. Following recharge, Ontario will recover the groundwater for further treatment as needed and distribute it to end users. The City continues to retrofit landscape irrigation systems to use recycled water where available. Future recycled water use projections are based on current recycled water use and planned recycled water projects. Table 6-4 shows the current and projected volume of recycled water from IEUA the City expects to deliver to its distribution system. The recycled water supply projections shown in Table 6-4 are equal to the supply to meet these future direct recycled water demands. 642
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Table 6-4- Recycled Water Direct Beneficial Uses - Retail Name(s) of Facility /ies Producing (Treating) the Recycled Water: IEUA Name of Supplier Operating the Recycled Water Distribution System: Ontario Use Type Potable or Non-Potable Additional Information 2025 2030 2035 2040 2045 2050 Potential Recycled Water Use Volume Agricultural irrigation Non-Potable 5,458 6,443 7,064 7,880 7,880 7,880 7,880 Landscape irrigation Non-Potable Irrigation 2,798 3,303 3,621 4,039 4,039 4,039 4,039 (exc golf courses) Golf course irrigation Non-Potable 410 484 531 592 592 592 592 Commercial use Non-Potable 1,461 1,725 1,891 2,109 2,109 2,109 2,109 Industrial reuse Non-Potable 987 1,165 1,277 1,425 1,425 1,425 1,425 Other (Description Required) - Construction Non-Potable Hydrant 292 345 378 422 422 422 422 Subtotal Non-Potable 11,406 13,465 14,762 16,467 16,467 16,467 Total 11,406 13,465 14,762 16,467 16,467 16,467 projected recycled water demands, over the next 25 years in five-year increments, are provided in Table 6-4 and Table 6-9. Table 6-5 compares the 2020 UWMP projected recycled water use for 2025 to the actual 2025 recycled water use. Recycled water projections were provided to IEUA and are based off expected growth within the Recycled Water Master Plan. Additional recycled water supply is available entitlement under the Regional Sewerage Contract. 643
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Table 6-5 - 2020 UWMP RW Projection Compared to 2025 Actual - Retail Use Type 2020 Projection for 2025 2025 Actual Use Agricultural irrigation 1,704 5,458 Landscape irrigation (exc golf courses) 7,088 2,798 Golf course irrigation 660 410 Commercial use 0 1,461 Industrial reuse 2,716 987 Other (Description Required) - Construction 0 292 Total: 12,168 11,406 6.2.2.3 Actions to Encourage and Optimize Future Recycled Water Use The City plans to continue to increase delivery capacity and expand its recycled water system to serve additional customers. Because the City is reliant on imported water supplies, the economic and water supply reliability value of a recycled water system continues to increase. Any additional water supplies that can offset imported water purchases will make these projects potential recycled water customers within the City based on recycled water use for large-volume irrigation purposes (e.g. municipal parks, fields, golf courses, etc.). The City is evaluating the following potential methods to expand future recycled water use. These potential methods are tabulated in Table 6-6. As a retail water supplier, the City will offer its customers (with non-potable water demands) an economic incentive to convert their use to recycled water. -to-Serve Charge, which is based on meter size, and a Usage Charge, which is based on the amount of water use. The Readiness-to-Serve Charge for a recycled water meter is approximately 55 percent of the Readiness-to-Serve Charge for a potable water meter. The variable Usage Charge for recycled water is approximately 60 percent of the charge on the rate that IEUA sells the recycled water for.) -8.715 Rates, fees, charges and deposits provides that constructing the facilities needed to deliver recycled water to an applicant's property. Subject to the availability of funds, the City may: o Reimburse an applicant for costs incurred to install oversized facilities in the public right-of-way o Elect to participate in or construct pipelines, reservoirs, pumping stations or other facilities, as it determines necessary, and/or as funds are available. 644
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-that recycled water be used for any purposes approved for recycled water use, when it is economically, technically, and institutionally feasible. Recycled water shall be the primary source of supply for commercial and industrial uses, whenever available and/or feasible. Use of potable water for commercial and industrial uses shall be contrary to City policy; shall not be considered the most beneficial use of a natural resource; and As a contracting agency of IEUA, the City will investigate the availability of financial assistance for plumbing retrofits necessary to receive recycled water. The City will evaluate the viability of making conversion to recycled water mandatory for those customers with non-potable uses that are in proximity to an existing or planned recycled water pipeline. Table 6-6 - Methods to Encourage Future Recycled Water Use Name of Action Description Planned Implementation Year Expected Increase in Recycled Water Use Recycled Water Expansion Expand recycled water distribution system pursuant to City's "2025 Recycled Water Master Plan" 2050 5,198 Total 5,198 6.3 Stormwater Stormwater recharge into the Chino Basin is managed by Chino Basin Watermaster, Chino Basin Water Conservation District (CBWCD), and SBCFCD. The City does not manage its own stormwater recharge basins. The City receives a stormwater recharge credit for all stormwater recharge proportional to its share of the OSY. 6.4 Desalinated Water Opportunities The City purchases desalinated brackish groundwater from CDA (see Section 6.1.2). Additional production of desalinated brackish groundwater from the Chino Basin is not anticipated since there are no additional regulatory or judicial drivers for desalination outside of the current scope of CDA, and new production from the Chino Basin could be placed where water quality is favorable. Desalination of ocean water is not practical at this time due to distance from the ocean. 645
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6.5 Water Exchanges and Transfers 6.5.1 Exchanges Dry Year Yield Program The DYYP is a groundwater storage and recovery program where supplemental imported water is stored in the Chino Basin during surplus wet years and recovered in dry years in-lieu of imported water from MWD through IEUA. The DYYP allows maximum use of imported water supplies available during wet years and stored groundwater in the Chino Basin during dry years. The DYYP can store up to 100,000 AF at a maximum replenishment rate of 25,000 AFY and extract a maximum of 33,000 AFY of stored water. According to IEUA and Chino Basin Watermaster, at the end of FY2024/25, there was approximately 64,000 AF within the DYYP storage account. The agreement that authorized the DYYP is currently set to expire in 2028; however, it remains under discussion by the Operating Committee, including potential renewal options. These discussions include a potential five-year extension that would allow recovery of stored water over a longer duration, if needed. Otherwise it is anticipated that participating agencies will recover or purchase all of the water stored under the DYYP Program by 2028. The City authorized execution of an agreement with IEUA to participate in the DYYP in 2003. Participation obligates the City to reduce its use of imported water compared to the previous three-year rolling average obligation is 8,076 AFY, or by operating parties' total reduction requirements as interpreted by subsequent program amendments not approved by the Court. During years when MWD calls for are reduced by 8,076 AFY compared to the previous year. Since Jurupa Community Services District does not have an imported water connection, it has entered into an agreement with the City for meeting its shift obligation. Under this agreement, Jurupa Community Services District conveys groundwater to the City in an amount equal to its shift obligation, as needed. DYYP funds were used for the construction of three groundwater wells (Wells 45, 46, and 47) and an ion-exchange facility located at John Galvin Park to treat water extracted from Well 44 pays an operation and maintenance credit, and the City pays MWD (through IEUA) the full-service water rate. The City can use the DYYP facilities to meet its normal water demands during other periods but is responsible for the cost of well operation and maintenance. The program allows the City to be less reliant upon imported water supplies. The additional groundwater capacity allows the City to increase the percentage of groundwater supply used to meet peak demands. 6.5.2 Transfers The City may assign, lease, or sell rights to produce Chino Basin Water per the Chino Basin Peace Agreement, but currently has no active transfer programs. 646
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6.5.3 Emergency Interties The City has emergency interties with other water agencies that can provide short-term emergency water supplies. Emergency interties are distribution system interconnections between water agencies for use during critical situations where one system or the other is temporarily unable to provide sufficient potable water to meet its water demands and/or fire protection needs. An emergency interconnection will allow a water system to continue serving water during critical situations such as local water supply shortages as a result of earthquakes, fires, prolonged power outages, and droughts. The City has interconnections with CDA, WFA, CVWD, and Chino. There are two interconnections to WFA and five interconnections to CDA for imported water. The City has one interconnection with CVWD and one interconnection with the City of Chino. The City also has Mutual Aid Agreements with the following agencies: Chino, Chino Hills, Fontana, Monte Vista Water District, Cucamonga Valley Water District and IEUA. 6.6 Supply From Storage Supply from storage refers to water that was previously stored and later recovered for use during the reporting year. This category applies only to water recovered from its storage asin groundwater supplies and are included in the groundwater supply description and projections. To avoid double counting, only water that was placed into storage in a prior year and recovered during the reporting year is reported as supply from storage. If water is placed into storage and then recovered within the same reporting year, it is not reported as supply from storage because it would already be counted under its original source (for example, purchased or imported water). Chino Basin storage mechanisms are described in Section 6.1.1.4. 6.7 Future Water Projects The City plans to support demand growth through increased Chino Basin groundwater production. As the need arises, the City will construct more Chino Basin wells. This growth in production is captured in Table 6-9. No other potable water supply projects are anticipated at this time. The City will also continue to expand its recycled water system, as discussed in Section 6.2.2.2. 6.8 Historical Production and Future Water Supplies As discussed in Section 6.1, t: Groundwater pumped from the Chino Basin Treated groundwater from the Chino Basin produced by CDA Treated, imported water purchased from WFA 647
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Groundwater and/or surface water purchased from SAWCo Recycled water purchased from IEUA Table 6-7. Table 6-8 shows the Table 6-7 - Historical Water Use by Source Fiscal Year System Water Supply Sources Total Potable Water Recycled Water Groundwater Purchased Water Subtotal Chino Basin CDA WFA SAWCo 2015-16 22,751 2,682 2,755 338 28,526 7,510 36,036 2016-17 24,671 3,069 4,132 171 32,043 8,351 40,394 2017-18 26,109 4,032 3,211 341 33,693 9,653 43,346 2018-19 19,604 5,724 5,737 403 31,468 7,511 38,979 2019-20 18,184 6,636 6,513 565 31,898 7,812 39,710 2020-21 20,281 7,337 5,851 500 33,969 8,556 42,525 2021-22 18,628 8,927 5,687 430 33,671 9,593 43,264 2022-23 16,385 8,589 4,055 413 29,442 8,790 38,232 2023-24 14,345 8,680 5,505 485 29,015 9,180 38,195 2024-25 18,672 8,353 5,103 490 32,619 11,406 44,025 Source: Data provided by Ontario Municipal Utility Company 648
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Table 6-8- 2025 Water Supplies - Retail Water Supply Additional Description 2025 Actual Volume Groundwater (not desalinated) Chino Basin Potable 18,672 Purchased or Imported Water WFA Potable 8,353 Purchased or Imported Water CDA Potable 5,103 Purchased or Imported Water SAWCO Potable 490 Recycled Water IEUA Purchase Non-Potable 11,406 Subtotal Potable 32,619 Subtotal Non-Potable 11,406 Total 44,025 649
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Anticipated future supply use through 2050 is presented in Table 6-9. The City has fixed entitlements to CDA and SAWCO purchases of 8,533 AFY and 600 AFY, respectively, so production from those sources is expected to remain consistent in the future. The City anticipates sharp demand growth due to urban development in the south side of its service area. To meet the growing demand, both imported water purchased from WFA and Chino Basin groundwater supplies will increase. Recycled water projections were provided to IEUA and are based off expected growth within the IEUA Recycled Water Program Strategy Update. Additional recycled water supply Sewerage Contract. As described in Section 1.5, Ontario and WFA are member agencies of IEUA, who has prepared its own 2025 UWMP, which -reliance as described in Appendix B. The supply projections in Table 6-9 planned use of supplies in a normal hydrologic year. The reliability of these supplies under dry conditions is evaluated in Section 7. Table 6-9 - Projected Water Supplies - Retail Water Supply Projected Water Supply Supply Additional Detail on Water Supply Water Quality 2030 2035 2040 2045 2050 (opt) Groundwater (not desalinated) Chino Basin Potable 29,611 30,222 39,860 39,860 39,860 Purchased or Imported Water WFA Potable 4,793 6,279 6,711 6,711 6,711 Purchased or Imported Water CDA Potable 8,533 8,533 8,533 8,533 8,533 Purchased or Imported Water SAWCO Potable 600 600 600 600 600 Recycled Water IEUA Purchase Non-Potable 13,465 14,762 16,467 16,467 16,467 Subtotal Potable 43,537 45,634 55,704 55,704 55,704 Subtotal Non-Potable 13,465 14,762 16,467 16,467 16,467 Total 57,002 60,396 72,171 72,171 72,171 6.9 Climate Change Effects Climate change has the possibility of impacting the availability of planned water supplies, particularly during a drought period. Section 4.4 describes climate change considerations that may affect future demands and some supply sources. Ontariochange to determine the future availability of imported water in dry, wet, and normal years. While climate change is projected to decrease normal year imported water supplies in the 650
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future, the MWD UWMP affirms that sufficient imported water supplies are available to meet MWD member agency demands during normal years. Climate change may impact future local precipitation which may lead to reduced natural recharge of local groundwater basins. Despite this, the Chino Basin is proactively managed to prevent pumpers from needing to reduce supplies. The Chino Basin Watermaster and pumpers participate in the OBMP and participate in and fund recharge efforts, including recycled water, which is resilient to climate change. Ontario has a flexible supply portfolio that includes groundwater, imported water, and recycled water. This diverse water supply portfolio helps the City adapt to different climate change impacts. 6.10 Energy Use The total average energy consumed was approximately 16,143,167 kWh during FY 2024-2025. The total average volume of water entering the potable water system was approximately 32,619 AF during FY 2024-2025 and does not include recycled water. The energy intensity data and Table 6-10 below. The City calculated its energy intensity using readily available energy consumption data from monthly electricity bills provided by Southern California Edison (SCE) for the entire water system, along with corresponding water use data obtained from available water meter readings. The City does not track energy use for individual water management processes and has across all water management activities. The total energy consumed excludes electricity usage for general administration (which is not an identified water management process). The total energy consumption includes energy associated with operating groundwater production wells and booster pumps to deliver water in the distribution system. Energy consumption is associated with operating groundwater treatment. Energy consumption is also associated with plant lighting and air conditioning, and operating the Supervisory Control and Data Acquisition (SCADA) system and chlorination injection pumps. -consequential hydropower energy could be generated even if no water was being delivered to water users). --generation, and diesel generator sources. 651
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Table 6-10 - Total Utility Approach for Single Water Delivery Products - Energy Reporting Water Delivery Product Retail Potable Deliveries Only for Water Delivery Products Under the Urban Water Supplier's Operational Control Start Date of Reporting Period 7/1/2024 Sum of All Water Management Processes Non-Consequential Hydropower End Date of Reporting Period 6/30/2025 Is upstream embedded energy in the values reported? Units of Measure for Water AF Total Utility Hydropower Net Utility Volume of Water Entering Process 32,619 - 32,619 Energy Consumed (kWh) 16,143,167 - 16,143,167 Energy Intensity (kWh/vol. converted to MG) 1,519 - 1,519 The total energy consumed was identified based on Southern California Edison (SCE) billing records. The total energy consumed excludes electricity usage for general administration (which is not an identified water management process). Narrative: The total energy consumption includes energy associated with operating groundwater production wells and booster pumps to deliver water in the distribution system. Energy consumption is associated with operating groundwater treatment. Energy consumption is also associated with plant lighting and air conditioning, and operating the Supervisory Control and Data Acquisition (SCADA) system and chlorination injection pumps. 652
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7Water Service Reliability This section describes water service reliability through 2050. As required by the UWMP Act, the assessment must compare total projected water supply and demands over the next 20 years in five-year increments under normal, single dry water years, and multiple dry water years. This section also includes the DRA, which provides a snapshot of the anticipated surplus or deficit if a drought were to occur in the next five years. I N T HIS S E CTI ON Water Service Reliability Assessment Drought Risk Assessment 653
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7.1 Introduction Water service reliability is determined based on the security of water supply and water infrastructure. Evaluating the water service reliability is critical for water management as it can help identify potential problems before these happen. Water managers can then take proactive steps to mitigate shortages by encouraging WUE, securing new water supplies and/or investing in infrastructure. 7.2 Water Service Reliability Assessment Ontariowater shortages are anticipated within the next 25-years under normal, single dry water years, and multiple dry water years. The approach for the analysis and results are discussed in this section. 7.2.1 Service Reliability - Constraints on Water Sources groundwater from the Chino Basin produced by the CDA; treated, imported surface water purchased from MWD through WFA; groundwater and/or surface water purchased from SAWCo; and recycled water purchased from IEUA, as described in Section 6. The City produces groundwater from the Chino Basin. The groundwater historically has been previously impacted by contamination. However, the City has developed and implemented appropriate treatment (blending and/or treatment facilities) which have been approved by the State Water Board. These groundwater supplies are considered reliable both from a water quality and quantity standpoint. multi-year drought or other conditions which limits MWD from delivering sufficient water supplies to all of its member agencies, and consequently to IEUA, WFA, and the City. Imported water WMP. As described in Section 1.5, Ontario and WFA are member agencies of IEUA, who has prepared its Delta reliance and improved regional self-reliance as described in Appendix B. 7.2.2 Service Reliability Year Type Characterization In accordance with CWC Section 10635(a), every urban water supplier must provide their expected water service reliability for a normal year, single dry year, and five consecutive dry years for 2030, 2035, 2040, 2045, and optionally 2050. DWR defines these years as: Normal Year: This condition represents a single year or an averaged range of years that most closely represents the average water supply available. 654
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Single Dry Year: The single dry year is recommended to be the year that represents the lowest water supply available. Five-Consecutive Year Drought: The driest five-year historical sequence for the supplier, which may be the lowest average water supply available for five years in a row. As a result of Ontario-apportioned during dry years to meet Ontariosupply will fluctuate from average conditions at the rate they did during historic dry conditions. To determine the percentage of demand fluctuation in dry periods, historic rainfall and production were assessed to determine average and dry years. The percentage differences in production for dry years compared to average are shown in Table 7-1. Table 7-1- Water Supply Reliability Assessment - Retail Year Type Base Year Volume Available % of Average Supply Average Year 2012-2025 32,656 100% Single-Dry Year 2018 33,693 103% Consecutive Dry Years 1st Year 2012 35,111 108% Consecutive Dry Years 2nd Year 2013 35,837 110% Consecutive Dry Years 3rd Year 2014 36,769 113% Consecutive Dry Years 4th Year 2015 33,128 101% Consecutive Dry Years 5th Year 2016 28,526 87% 7.2.3 Water Service Reliability Supply and Demand Comparison Results of the water supply and demand analysis for normal, single dry, and five-year consecutive drought are shown in the following sections. Based on reliability analyses in MWD, IEUA, CDA, and WFA UWMPs, and Chino Basin rights and management practices described in Sections 6.1 and 7.2.4, the City expects to meet demands under all water year scenarios. However, Ontario is committed to continuing water conservation efforts to ensure reliability and resiliency in the future. 7.2.3.1 Water Service Reliability Normal Year Table 7-2 summarizes Ontario-year increments and are projected to be met by Ontario 655
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Table 7-2- Normal Year Supply and Demand Comparison - Retail 2030 2035 2040 2045 2050 Supply totals 43,537 45,634 55,704 55,704 55,704 Use totals 43,537 45,634 55,704 55,704 55,704 Surplus/(shortfall) 0 0 0 0 0 7.2.3.2 Water Service Reliability Single-Dry Year Table 7-3 summarizes Ontario-year increments during single dry years. Dry year demands are expected to change from average demands by the percentages shown in Table 7-1 and are projected to be met by Ontario supply. Table 7-3- Single Dry Year Supply and Demand Comparison - Retail 2030 2035 2040 2045 2050 Supply totals 44,919 47,082 57,472 57,472 57,472 Use totals 44,919 47,082 57,472 57,472 57,472 Surplus/(shortfall) 0 0 0 0 0 7.2.3.3 Water Service Reliability Five Consecutive Dry Years Table 7-4 summarizes Ontario-year increments during five consecutive years of drought conditions. Dry year demands are expected to change from average demands by the percentages of average shown in Table 7-1 and are projected to be met by Ontario 656
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Table 7-4- Five Consecutive Dry Years Supply and Demand Comparison - Retail 2030 2035 2040 2045 2050 (Opt) First Year Supply Totals: 46,810 49,064 59,891 59,891 59,891 Use Totals: 46,810 49,064 59,891 59,891 59,891 Surplus/(shortfall) 0 0 0 0 0 Second Year Supply Totals: 47,778 50,079 61,130 61,130 61,130 Use Totals: 47,778 50,079 61,130 61,130 61,130 Surplus/(shortfall) 0 0 0 0 0 Third Year Supply Totals: 49,020 51,381 62,719 62,719 62,719 Use Totals: 49,020 51,381 62,719 62,719 62,719 Surplus/(shortfall) 0 0 0 0 0 Fourth Year Supply Totals: 44,166 46,293 56,509 56,509 56,509 Use Totals: 44,166 46,293 56,509 56,509 56,509 Surplus/(shortfall) 0 0 0 0 0 Fifth Year Supply Totals: 38,031 39,862 48,659 48,659 48,659 Use Totals: 38,031 39,862 48,659 48,659 48,659 Surplus/(shortfall) 0 0 0 0 0 7.2.4 Description of Management Tools and Options As noted in Section 6.1.1, the Chino Basin is managed under the Chino Basin adjudication. During the period of management under the Judgment, significant drought events have occurred. In each drought cycle the Chino Basin has been managed to maintain water levels. Therefore, based on historical and on-going management practices, the City will be able to rely on the Chino Basin for adequate supply over the next 25 years under single dry years and a five consecutive year drought periods. Section 6.1.1.4 provides a description of the management of groundwater resources in the Chino Basin, as well as information on basin management. Section 6 also demonstrates the management structure of the Chino Basin provides a reliable source of groundwater supply for 657
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the City during a normal year, a single-dry year and a five consecutive year drought. Historical data indicates the Chino Basin has been well managed for the full period of the adjudication, resulting in a stable and reliable water supply. While Ontario does not anticipate any shortfall during drought periods, the City is committed to supporting the water reliability of the region overall. Some of the management tools and options available to the City for increasing its water supply and reducing water demand have been described within other sections of this document. These tools and options include prioritizing maximizing the use of local water resources and minimizing the need for imported water due to the vulnerability of MWD imported water to climate change impacts such as changing precipitation patterns. Ontario also has a robust WUE program detailed in Section 9 that identifies the most effective WUE measures and partnerships for implementation in the region. Additional tools available to the region include water agency interconnections and mutual aid agreements with other local agencies. 7.3 Drought Risk Assessment CWC Section 10635 (b) requires a DRA. The DRA provides a quick snapshot of the anticipated surplus or deficit if a five-consecutive year drought were to occur in the next five years. The DRA informs the WSCP and can be modified or updated outside of the UWMP five-year plan cycle, so a description of the data, methodology, and basis for shortage conditions must be available water supplies and projected demands during a five-consecutive dry years scenario. This short-term analysis can help water suppliers foresee undesired risks, such as upcoming shortages, and provide time to evaluate and implement the necessary response actions needed to mitigate shortages in a less impactful manner to the community and environment. 7.3.1 Data, Methods, and Basis for Water Shortage Condition The DRA builds on the water service reliability analysis from Section 7.2, which incorporated assessment of historical consumption data by customer class, populated from billing records, and historical supply data by source from production reports. Based on this data, historical demand has never exceeded available supply. For this DRA analysis, normal year demand conditions and five consecutive year drought supply conditions were considered for 2026-2030. 7.3.2 DRA Water Source Reliability As described previously, Ontario does not anticipate any supply shortages within the next five years as shown in Table 7-5. Average year demands were estimated by linear interpolation from 2025 to 2030. Then, dry year demand response percentages were applied 2026-2030 average demands based on Table 7-1. 658
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Table 7-5- Five-Year Drought Risk Assessment - Retail 2026 Total Total Water Use: 37,419 Total Supplies: 37,419 Surplus/Shortfall w/o WSCP Action 0 2027 Total Total Water Use: 40,589 Total Supplies: 40,589 Surplus/Shortfall w/o WSCP Action 0 2028 Total Total Water Use: 44,103 Total Supplies: 44,103 Surplus/Shortfall w/o WSCP Action 0 2029 Total Total Water Use: 41,951 Total Supplies: 41,951 Surplus/Shortfall w/o WSCP Action 0 2030 Total Total Water Use: 38,031 Total Supplies: 38,031 659
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8Water Shortage Contingency Plan The Water Shortage Contingency Plan (WSCP) is a detailed plan for how City intends to act in the case of an actual water shortage condition. This allows for management of a shortage with predictability and accountability. I N T HIS S E CTI ON Overview of WSCP Components Water Supply Reliability Analysis Annual Water Supply and Demand Assessment Six Standard Water Shortage Levels Shortage Response Actions Communication Protocols Compliance, Enforcement, and Legal Authorities Implementation 660
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8.1 Introduction The CWC Section 10632 requires that every urban water supplier shall prepare and adopt a standalone WSCP as part of its UWMP. The WSCP is a strategic plan that City of Ontario uses to prepare for and respond to foreseeable and unforeseeable water shortages. A water shortage occurs when the water supply available is insufficient to meet the normally expected customer water use at a given point in time. A shortage may occur due to a number of reasons, such as water supply quality changes, climate change, drought, regional power outage, and catastrophic events (e.g., earthquake). Additionally, the State may declare a statewide drought emergency and mandate that water suppliers reduce demands. The WSCP serves as the operating manual that City of Ontario will use to prevent catastrophic service disruptions through proactive, rather than reactive, mitigation of water shortages. The WSCP provides a process for an Annual Assessment and structured steps designed to respond to actual conditions. This level of detailed planning and preparation provides accountability and predictability and will help City of Ontario maintain reliable supplies and reduce the impacts of any supply shortages and/or interruptions. 8.2 Overview of WSCP Components The CWC establishes several prescriptive elements that must be included in a retail water Water Supply Reliability Analysis: reliability and identifies any key issues that may trigger a shortage condition. Annual Water Supply and Demand Assessment Procedures: Describes the key data inputs, and the steps to formally declare any water shortage levels and response actions. Shortage Stages: Establishes water shortage levels to clearly identify and prepare for shortages. Shortage Response Actions: Describes the response actions that may be implemented or considered for each stage to reduce gaps between supply and demand. Communication Protocols: Describes communication protocols under each stage to ensure customers, the public, and government agencies are informed of shortage conditions and requirements. Compliance and Enforcement: Defines compliance and enforcement actions available to administer demand reductions. Legal Authorities: Lists the legal documents that grant City of Ontario the authority to declare a water shortage and implement and enforce response actions. 661
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Financial Consequences of WSCP Activation: Describes the anticipated financial impact of implementing water shortage stages and identifies mitigation strategies to offset financial burdens. Monitoring and Reporting: Summarizes the monitoring and reporting techniques to evaluate the effectiveness of shortage response actions and overall WSCP implementation. Results are used to determine if additional shortage response actions should be activated or if efforts are successful and response actions should be reduced. WSCP Refinement Procedures: Describes the factors that may trigger updates to the WSCP and outlines how to complete an update. Special Water Feature Distinctions: Identifies exemptions for decorative features aside from pools and spas. Plan Adoption, Submittal, and Availability: Describes the process for the WSCP adoption, submittal, and availability after each revision. document that can be modified as needed. The document is compliant with the CWC Section 10632 and incorporates guidance from the UWMP Guidebook 2025 (Guidebook) (Department of Water Resources, 2025). 8.3 Water Supply Reliability Analysis groundwater pumped from the Chino Basin; treated groundwater from the Chino Basin produced by the CDA; treated, imported water purchased from MWD through WFA; groundwater and/or surface water purchased from SAWCo; and recycled water purchased from IEUA. The City provides recycled water for irrigation instead of potable supplies. The Chino Basin is adjudicated, and groundwater supplies are managed. The reliability of the various sources of supply are discussed in Section 7 of the 2025 UWMP. Based on the adjudication provisions in the Chino Basin, the City can produce groundwater in excess of its rights, provided the City pays assessments to the Chino Basin Watermaster, which are used to purchase water to replenish the Chino Basin. Imported water supplies (both treated and untreated) may be impacted in the event MWD implements its Water Supply Allocation Plan (WSAP) due to a water supply shortage. Finally, recycled water is locally generated and generally is not impacted by drought conditions. Pursuant to CWC Section 10635, the City has conducted an analysis of its long-term water supply reliability which compares future water demands to best projections of supply availability under a range of hydrologic conditions. This analysis was most recently completed as a part of of the WSCP provides a concise summary of these assessments. The City recognizes that the WSCP is a stand-alone document that may be updated independently from the UWMP. In the 662
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event of updates to the supply and demand projections outside of the UWMP planning cycle, this section of the WSCP may be updated to reflect revisions to the Water Service Reliability Assessment and the DRA. Section 7.2 over the next 25 years in five-year increments, including during normal years, single dry years, and a five consecutive year drought periods. It is anticipated that the City will have sufficient water supplies available to meet projected demands. 8.4 Annual Water Supply and Demand Assessment Procedures Since July 1, 2022, the City has been required to submit an Annual Assessment in accordance s unconstrained water demands (i.e. water demands prior to any projected response actions the City may trigger under this WSCP) for the current year and the upcoming (potential single dry) year. The City also assesses information regarding anticipated shortages, triggered shortage response actions, compliance and enforcement actions, and communication actions consistent For each Annual Assessment, the City plans to prepare a preliminary assessment which evaluates the adequacy of its water supplies for the current and upcoming years. The preliminary assessment will include a review of water supplies for at least a single dry year. The components of an Annual Assessment consist of the following: A decision-making process Key data inputs and assessment methodology 8.4.1 Decision Making Process The City produces groundwater from the Chino Basin as its primary source of water supply and that basin is managed on a FY basis. Consequently, during the third quarter of each FY the City will review its water demands from the initial six months along with the current groundwater basin conditions and local hydrology. This information will be used to help develop the Annual Assessment. A draft of the Annual Assessment will be circulated internally within the Utilities Water Resources Department for peer review and comment. Based on comments received, a redraft will be prepared and provided to the Water Resources Manager during the Spring of each year. If a new water shortage stage or new shortage response actions are required, a final draft of the Annual Assessment may be provided to the General Manager and City Council for review such that any recommended specific shortage response actions may be enacted. The final Annual Assessment will be provided to DWR no later than July 1 of each year. The Annual Assessments will be instrumental in providing guidance to the City for decisions regarding potential declarations of a water supply shortage and implementation of water reduction stages, instituting mandatory water restrictions, promoting WUE and conservation 663
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programs, adopting and implementing water rates and drought rate surcharges, and pursuing alternative water supplies when necessary. This process will help ensure adequate water supply resources are available to the City. 8.4.2 Data and Methodologies The key data inputs and methodologies which will be evaluated by the City during the preparation of the preliminary assessment will include the following: 1. Evaluation Criteria: The locally applicable evaluation criteria used to prepare the Annual Assessment will be identified. The evaluation criteria may include, but is not limited to, an analysis of current local hydrology (including rainfall and groundwater levels), current water demands, a review of water system improvement plans which may impact infrastructure availability, and water quality regulations which may impact groundwater availability. 2. Water Supply: An assessment of each available water supply source will be conducted. The assessment may include a quantification of each available water supply source based on review of current production capacities, historical production, UWMPs, and prior water supply studies (including Water Supply Assessments and/or Master Plans). 3. Unconstrained Water Demand: The potential unconstrained water demands during the current year and the upcoming (potential single dry) year, prior to any special shortage response actions, will be reviewed. The review may include factors such as weather, existing and projected land uses and populations, actual customer consumption and water use factors, monthly demand and supply reports, existing water shortage levels (see Section 8.5), and existing water conservation ordinances (see Section 9 of UWMP). 4. Planned Water Use for Current Year Considering Dry Subsequent Year: The water supplies available and projected for use to meet the demands during the current year and the upcoming (potential single dry) year will be considered and identified by each type of supply. The evaluation may include factors such as estimated water demands, weather, groundwater basin operating safe yields, water quality results, existing available pumping capacities, imported water allocations, contractual obligations, regulatory issues, use of emergency interconnections, and the costs associated with producing each water supply source. 5. Infrastructure Considerations: The capabilities of the water system infrastructure to meet the water demands during the current year and the upcoming (potential single dry) year will be considered. Available production capacities (e.g. groundwater well capacities) and distribution system water losses will be reviewed. In addition, capital improvement and replacement projects, as well as potential projects which may increase water system and production capacities, will be considered. 6. Other Factors: Additional local considerations, if any, which can affect the availability of water supplies will be described. 664
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8.5 Six Standard Water Shortage Levels The City has a legal responsibility to provide water utility services, including water for residential, commercial, industrial, public authority, and for public fire hydrants and private fire services. The City will manage water supplies prudently to minimize the adverse impacts of water shortages. Tsevere or extended water shortage. This includes structured stages of action referred to as water supply shortage planning levels. Table 8-1 provides a description of the six standard levels sources, depending on the severity of the shortage and its anticipated duration. 665
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Table 8-1- Water Shortage Contingency Planning Levels Shortage Level Percent Shortage Range Shortage Response Actions (Narrative description) 1 Up to 10% Washing of motor vehicles, trailers, boats, or other types of mobile equipment shall be done only with a hand-held bucket or a hose equipped with a positive shutoff nozzle for quick rinses, except that washing may be done at the immediate premises of a commercial car wash or with reclaimed wastewater. No person shall sprinkle, water, or irrigate any landscaped or vegetated areas between the hours of 9:00 a.m. and 4:00 p.m. 2 Up to 20% In addition to Shortage Level 1, operators of hotels and motels must provide the option of choosing not to have towels and linens laundered daily. Irrigation is prohibited during and within 48 hours of rainfall. 3 Up to 30% In addition to Shortage Level 2, the use of fire hydrants shall be limited to fire fighting and related activities and other uses of water for municipal purposes shall be limited to activities necessary to maintain the public health, safety, and welfare. Unless written permission has been granted by the City Manager or his/her designee, the use of potable water for construction activities and grading shall be prohibited. 4 Up to 40% In addition to Shortage Level 3, residents and CII customers will be prohibited from irrigating turf or other landscaping more than two days a week. No person shall irrigate any turf or landscaped area more than fifteen minutes (15) on watering days. No vehicles shall be washed unless it is taken to a carwash. 5 Up to 50% In addition to Shortage Level 4, residents and CII customers will be prohibited from irrigating turf or other landscaping more than one day a week. 6 Greater than 50% In addition to Shortage Level 5, unless otherwise permitted by a resolution of the City Council, there shall be no use of potable water for irrigation of outdoor landscape or turf. Commercial nurseries shall be prohibited from the use of potable water for irrigation of outdoor, landscape and turf except by use of a hand-held hose equipped with a positive shutoff nozzle. The following nonessential use of water shall be prohibited: the filling, cycling, filtering, or refilling of swimming pools, spas, Jacuzzis, fountains, or other like devices. The 2025 UWMP requires urban water suppliers to have six standardized water shortage 666
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(City of Ontario, 2021) established a voluntary stage followed by four water supply shortage levels that would be mandatory once put into effect: Stage 1 addresses a water supply shortage of up to 10 percent; Stage 2 addresses a water supply shortage of up to 20 percent; Stage 3 addresses a water supply shortage of anywhere between 20 percent to 50 percent; and Stage 4 addresses a water supply shortage of more than 50 percent. During the 2020 UWMP cycle, the City prepared a Water Conservation Plan (City of Ontario, 2021) that addressed the six standard stages of action in accordance with DWR. Under this stage during normal water supply conditions as well as the existing Stage 1 and Stage 2 water supply shortage levels as is. However, the City amended Stage 3 to address a water supply shortage of up to 30 percent. In addition, the City included Stage 4 and Stage 5 that will be used to address a water supply shortage of up to 40 percenexisting Stage 4 was amended to a Stage 6 level which addresses a water supply shortage of more than 50 percent. For the 2025 UWMP, the City will continue to follow the Water Conservation Plan. In 2023, California chaptered into law the Non-Function Turf Irrigation Regulations (Assembly Bill 1572) requiring all public water systems to revise their ordinances to ban irrigation, with potable water, of non-functional turf located on commercial, industrial, and institutional properties. The City is working toward updating their Municipal Code (Title 6 Chapter 8A for Water Conservation Plan) to include the required language within General Prohibitions, not affecting the Conservation Stages. 8.6 Shortage Response Actions 8.6.1 Demand Reduction 8.6.1.1 Voluntary Conservation Stage All people are encouraged to voluntarily limit the amount of water used to the amount absolutely necessary for health and safety, business operations, and irrigation. Except as otherwise provided in this chapter where a declared water shortage stage or water shortage emergency requires mandatory or other more stringent requirements, the following elements of conservation apply at all times on a voluntary basis by all people within the City: 1) Avoid hose washing of sidewalks, walkways, driveways, parking areas, or other paved surfaces, except as required for sanitary purposes. If a person uses a hand-held hose to wash any paved surfaces, the hose shall be equipped with a positive shutoff nozzle. 2) Wash motor vehicles, trailers, boats, and other types of mobile equipment using a hand-held bucket, or a hose equipped with a positive shutoff nozzle for quick rinses, 667
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or at the immediate premises of a commercial car wash or with recycled wastewater for approved uses. 3) Avoid using water to clean, fill, or maintain levels in decorative fountains, ponds, lakes, or other similar aesthetic structures unless such water is part of a recycling system. 4) Encourage restaurants, hotels, cafes, cafeterias, or other public places where food is sold, served or offered for sale, to serve drinking water only to those customers expressly requesting water. 5) Promptly repair all leaks from indoor and outdoor plumbing fixtures. 6) Avoid watering lawn, landscape or other turf areas more often than every other day and during the hours between 6:00 a.m. and 6:00 p.m. 7) Avoid causing or allowing the water to run off landscape areas into adjoining streets, sidewalks, or other paved areas due to incorrectly directed or maintained sprinklers or excessive watering. 8.6.1.2 Stage 1 Water Supply Shortage (Up to 10%) During a Stage 1, the following mandatory restrictions on the use of potable water shall be water supplies are likely to be reduced by up to ten percent (10%) or it has otherwise been requested or directed by executive order or regulation of a State agency to reduce its potable water consumption or production by a specified amount. 1) Except as required for health and sanitary purposes, washing of sidewalks, driveways, parking areas or other paved surfaces is prohibited. Any hand-held hose used for such purposes shall be equipped with a positive shutoff nozzle. 2) Washing of motor vehicles, trailers, boats or other types of mobile equipment shall be done only with a hand-held bucket or a hose equipped with a positive shutoff nozzle for quick rinses, except that washing may be done at the immediate premises of a commercial car wash or with reclaimed wastewater. 3) No water shall be used to clean, fill or maintain levels in decorative fountains, ponds, lakes or other similar aesthetic structures unless such water is part of a recycling system. 4) No restaurant, hotel, café, cafeteria or other public place where food is sold, served or offered for sale, shall serve drinking water to any customer unless expressly requested. 5) All water customers of the City shall promptly repair all leaks from indoor and outdoor plumbing fixtures. Such leak shall be repaired in a timely manner after notification by the City, but in no case after notification in excess of 72 hours for the first violation and then every 72 hours thereafter for the second and third violations. 6) No person shall sprinkle, water, or irrigate any landscaped or vegetated areas between the hours of 9:00 a.m. and 4:00 p.m. In any event, such watering shall not 668
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be in excess of needs nor be of a manner that allows water flow onto streets or other paved areas. The above mentioned may be watered by a hand-held hose equipped with a positive shutoff nozzle at any time of the day. Commercial nurseries, golf courses, and other water-dependent industries are exempt. 7) No water customer of the City shall cause or allow the water to run off landscaped area into adjoining streets, sidewalks or other paved areas due to incorrectly directed or maintained sprinkler or excessive watering. 8) The use of water from fire hydrants shall be limited to fire fighting and related activities necessary to maintain the public health, safety, and welfare. An exception may be made for construction use through a proper City-Designated meter. The use of potable water for construction activities shall be restricted in areas where recycled water is available for such use. 8.6.1.3 Stage 2 Water Supply Shortage (Up to 20%) During a Stage 2, the following mandatory restrictions on the use of potable water shall be applicable when the City Council determines that it is likely that the City will suffer a reduction of more than ten percent (10%) up to twenty percent (20%) in its water supplies or it has otherwise been requested or directed by executive order or regulation of a State Agency to reduce its potable water consumption or production by a specified amount. 1) All the prohibitions and restrictions in Stage 1 shall be in effect provided that the more restrictive measures noted in this Stage shall take precedence. 2) Filling or refilling of empty swimming pools shall not occur without the written permission of the City Manager or his/her designee. 3) All customers are prohibited from irrigating turf or ornamental landscapes during and within 48 hours following measurable rainfall. 4) Operators of hotels and motels must provide guests with the option of choosing not to have towels and linens laundered daily and prominently display notice of this option. 5) All persons, including the City, are prohibited from irrigating with potable water any ornamental turf on public street medians. 6) The use of potable water irrigation outside of newly constructed homes and buildings shall be consistent with the California Building Standards Commission and the Department of Housing & Community Development. 8.6.1.4 Stage 3 Water Supply Shortage (Up to 30%) During a Stage 3, the following mandatory restrictions on the use of potable water shall be applicable when the City Council determines that it is likely that the City will suffer a reduction of more than twenty percent (20%) and up to thirty percent (30%) in its water supplies or it has otherwise been requested or directed by executive order or regulation of a State Agency to reduce its potable water consumption or production by a specified amount. 1) All the prohibitions and restrictions in the preceding Stages shall be in effect provided that the more restrictive measures noted in this Stage shall take precedence. 669
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2) Residents and CII customers will be prohibited from irrigating any turf or landscape area more than four (4) days a week. 3) The use of water from fire hydrants shall be limited to fire fighting and related activities and other uses of water for municipal purposes shall be limited to activities necessary to maintain the public health, safety, and welfare. Unless written permission has been granted by the City Manager or his/her designee, the use of potable water for construction activities and grading shall be prohibited. 8.6.1.5 Stage 4 Water Supply Shortage (Up to 40%) During a Stage 4, the following mandatory restrictions on the use of potable water shall be applicable when the City Council determines that it is likely that the City will suffer a reduction of more than thirty percent (30%) and up to forty percent (40%) in its water supplies or it has otherwise been requested or directed by executive order or regulation of a State Agency to reduce its potable water consumption or production by a specified amount. 1) All the prohibitions and restrictions in the preceding Stages shall be in effect provided that the more restrictive measures noted in this Stage shall take precedence. 2) Residents and CII customers will be prohibited from irrigating turf or other landscaping more than two (2) days a week. 3) No person shall irrigate any turf or landscaped area more than fifteen minutes (15) on watering days. 4) No vehicles shall be washed unless it is taken to a carwash. 8.6.1.6 Stage 5 Water Supply Shortage (Up to 50%) During a Stage 5, the following mandatory restrictions on the use of potable water shall be applicable when the City Council determines that it is likely that the City will suffer a reduction of more than forty percent (40%) and up to fifty percent (50%) in its water supplies or it has otherwise been requested or directed by executive order or regulation of a State Agency to reduce its potable water consumption or production by a specified amount. 1) All the prohibitions and restrictions in the preceding Stages shall be in effect provided that the more restrictive measures noted in this Stage shall take precedence. 2) Residents and CII customers will be prohibited from irrigating turf or other landscaping more than one (1) day a week. 8.6.1.7 Stage 6 Water Supply Shortage Emergency (More than 50%) During Stage 6, the following mandatory restrictions on the use of potable water shall be applicable when the City Council determines that it is likely that the City will suffer a reduction of more than fifty percent (50%) in its water supplies or it has otherwise been requested or directed by executive order or regulation of a State agency to reduce its potable water consumption or production by a specified amount. A water shortage emergency may be declared whenever the City Council finds and determines that the ordinary demands and requirements of water 670
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consumers cannot be satisfied without depleting the water supply of the City to the extent that there would be insufficient water for human consumption, sanitation, and fire protection. A water shortage emergency may include an immediate emergency. An immediate emergency may occur as a result of a breakage or failure of a dam, pump, pipe line or conduit, a major earthquake, large-the City's available water supply. The following restrictions on the use of potable water shall be applicable during a Stage 6 Water Supply Shortage Emergency: 1) All the prohibitions and restrictions in the preceding Stages shall be in effect provided that the more restrictive measures noted in this Stage shall take precedence. 2) Unless otherwise permitted by a resolution of the City Council, there shall be no use of potable water for irrigation of outdoor landscape or turf. 3) Commercial nurseries shall be prohibited from the use of potable water for irrigation of outdoor, landscape and turf except by use of a hand-held hose equipped with a positive shutoff nozzle. 4) The following nonessential use of water shall be prohibited: the filling, cycling, filtering, or refilling of swimming pools, spas, Jacuzzis, fountains or other like devices. Table 8-2- Demand Reduction Actions Shortage Level Demand Reduction Actions How much is this going to reduce the shortage gap? Additional Explanation or Reference Penalty, Charge, or Other Enforcement? 1 Other - Prohibit use of potable water for washing hard surfaces Collective reduction from all Shortage Level 1 actions is up to 4,712 AF Yes 1 Other - Require automatic shut of hoses Collective reduction from all Shortage Level 1 actions is up to 4,712 AF Yes 1 Water Features - Restrict water use for decorative water features, such as fountains Collective reduction from all Shortage Level 1 actions is up to 4,712 AF Yes 671
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Shortage Level Demand Reduction Actions How much is this going to reduce the shortage gap? Additional Explanation or Reference Penalty, Charge, or Other Enforcement? 1 CII - Restaurants may only serve water upon request Collective reduction from all Shortage Level 1 actions is up to 4,712 AF Yes 1 Other - Customers must repair leaks, breaks, and malfunctions in a timely manner Collective reduction from all Shortage Level 1 actions is up to 4,712 AF Yes 1 Landscape - Limit landscape irrigation to specific times Collective reduction from all Shortage Level 1 actions is up to 4,712 AF Yes 1 Landscape - Restrict or prohibit runoff from landscape irrigation Collective reduction from all Shortage Level 1 actions is up to 4,712 AF Yes 672
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Shortage Level Demand Reduction Actions How much is this going to reduce the shortage gap? Additional Explanation or Reference Penalty, Charge, or Other Enforcement? 1 Other Collective reduction from all Shortage Level 1 actions is up to 4,712 AF The use of water for fire hydrants shall be limited to fire fighting and related activities necessary to maintain the public health, safety, and welfare. An exception may be made for construction use through proper city-designated meter. The use of potable water for construction activities shall be restricted in areas where recycled water is available for such use. Yes 2 Other Collective reduction from all Shortage Level 2 actions is up to 9,424 AF Includes all Stage 1 actions Yes 2 Other water feature or swimming pool restriction Collective reduction from all Shortage Level 2 actions is up to 9,424 AF Filling or refilling of empty swimming pools shall not occur without the written permission of the City Manager or his/her designee. Yes 673
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Shortage Level Demand Reduction Actions How much is this going to reduce the shortage gap? Additional Explanation or Reference Penalty, Charge, or Other Enforcement? 2 Landscape - Other landscape restriction or prohibition Collective reduction from all Shortage Level 2 actions is up to 9,424 AF All customers are prohibited from irrigating turf or ornamental landscapes during and within 48 hours following measurable rainfall. Yes 2 CII - Lodging establishment must offer opt out of linen service Collective reduction from all Shortage Level 2 actions is up to 9,424 AF Yes 2 Landscape - Prohibit all landscape irrigation Collective reduction from all Shortage Level 2 actions is up to 9,424 AF All persons, including the City, are prohibited from irrigating with potable water any ornamental turf on public street medians. Yes 2 Landscape - Other landscape restriction or prohibition Collective reduction from all Shortage Level 2 actions is up to 9,424 AF The use of potable water for irrigation outside of newly constructed homes and buildings shall be consistent with California Building Standards Commission and Department of Housing & Community Development. Yes 674
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Shortage Level Demand Reduction Actions How much is this going to reduce the shortage gap? Additional Explanation or Reference Penalty, Charge, or Other Enforcement? 3 Other Collective reduction from all Shortage Level 3 actions is up to 14,137 AF includes all Stage 2 actions Yes 3 Landscape - Limit landscape irrigation to specific days Collective reduction from all Shortage Level 3 actions is up to 14,137 AF Residents and CII customers will be prohibited from irrigating any turf or landscape area more than four days a week. Yes 3 Other - Prohibit use of potable water for construction and dust control Collective reduction from all Shortage Level 3 actions is up to 14,137 AF The use of water from fire hydrants shall be limited to fire fighting and related activities and other uses of water for municipal purposes shall be limited to activities necessary to maintain the public health, safety and welfare. Unless written permission has been granted by the City Manager or his/her designee, the use of potable water for construction activities and grading shall be prohibited. Yes 675
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Shortage Level Demand Reduction Actions How much is this going to reduce the shortage gap? Additional Explanation or Reference Penalty, Charge, or Other Enforcement? 4 Other Collective reduction from all Shortage Level 4 actions is up to 18,849 AF Includes all Stage 3 actions Yes 4 Landscape - Limit landscape irrigation to specific days Collective reduction from all Shortage Level 4 actions is up to 18,849 AF Residents and CII customers will be prohibited from irrigating any turf or landscape area more than two days a week. Yes 4 Landscape - Other landscape restriction or prohibition Collective reduction from all Shortage Level 4 actions is up to 18,849 AF No person shall irrigate any turf or landscaped area more than fifteen minutes (15) on watering days. Yes 4 Other - Prohibit vehicle washing except at facilities using recycled or recirculating water Collective reduction from all Shortage Level 4 actions is up to 18,849 AF Yes 5 Other Collective reduction from all Shortage Level 5 actions is up to 23,561 AF Includes all Stage 4 actions Yes 5 Landscape - Limit landscape irrigation to specific days Collective reduction from all Shortage Level 5 actions is up to 23,561 AF Residents and CII customers will be prohibited from irrigating any turf or landscape area more than one day a week. Yes 676
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Shortage Level Demand Reduction Actions How much is this going to reduce the shortage gap? Additional Explanation or Reference Penalty, Charge, or Other Enforcement? 6 Other Collective reduction from all Shortage Level 6 actions is greater than 23,561 AF Includes all Stage 5 actions Yes 6 Landscape - Prohibit all landscape irrigation Collective reduction from all Shortage Level 6 actions is greater than 23,561 AF Commercial nurseries shall be prohibited from the use of potable water for irrigation of outdoor, landscape and turf except by use of a hand-held hose equipped with a positive shutoff nozzle. Yes 6 Landscape - Other landscape restriction or prohibition Collective reduction from all Shortage Level 6 actions is greater than 23,561 AF Yes 6 Other water feature or swimming pool restriction Collective reduction from all Shortage Level 6 actions is greater than 23,561 AF The following nonessential uses of water shall be prohibited: the filling, cycling, filtering, or refilling swimming pools, spas, Jacuzzis, fountains or other like devices. Yes 8.6.2 Supply Augmentation The City does not plan to add a new source of water supply to address customer demands, but instead will consider increased supplies from existing sources. Instead, the City will focus on demand reduction measures in the event existing sources of supply are not sufficient to meet customer demands. As discussed in UWMP Section 677
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include: groundwater pumped from the Chino Basin; treated groundwater from the Chino Basin produced by the CDA; treated, imported surface water purchased from MWD through WFA; groundwater and/or surface water purchased from San Antonio Water Company; and recycled water purchased from IEUAfrom the Chino Basin. As noted in Section 8.4, since July 1, 2022, the City prepares and submit an Annual Assessment which will include a review of water supplies available to meet water demands for the current and upcoming years. In the event the City is currently in, or considers entering into, one of the standard water shortage levels identified in Section 8.5, the City will consider the water supply augmentation actions described below. For each water shortage level discussed in Section 8.5, the City will consider supplementing its existing water supplies through increased groundwater production instead of the purchase of additional imported water supplies, to the extent possible. source of water supply is strictly imported surface not anticipate augmenting water supplies. IEUA is limited in its ability to implement water supply augmentation actiTable 8-3actions that are relevant to IEUA. To the extent possible, IEUA would coordinate with MWD and its other member agencies on supply augmentation projects during normal and shortage periods to continue expanding water reliability for the entire region. Table 8-3- Supply Augmentation and Other Actions (DWR Table 8-3) SHORTAGE LEVEL SUPPLY AUGMENTATION METHODS AND OTHER ACTIONS BY WATER SUPPLIER HOW MUCH IS THIS GOING TO REDUCE THE SHORTAGE GAP? ADDITIONAL EXPLANATION OR REFERENCE 1-6 MWD Supply Augmentation 0 to 100% of shortage gap Coordinate with MWD and, if needed, purchase supplemental supplies from MWD Due to previous critically dry conditions, MWD developed the WSAP whereby available supplies are equitably allocated to its member agencies, including CDA, IEUA, and WFA. The WSAP establishes ten different shortage levels and a corresponding drought allocation to each member agency. Based on the shortage level established by MWD, the WSAP provides a reduced drought allocation to a member agency for its Municipal and Industrial (M&I) retail demand. The ratio of MWD water supply drought allocation to local water supply will change based on the WSAP stage. 678
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and Colorado River) and demand is to make optimal use of its supply augmentation options, consisting of drawing from flexible supply programs and storage reserves. MWD has developed and actively manages a portfolio of water supply programs including water transfer, storage, and exchange agreements. MWD pursues voluntary water transfer and exchange programs to help mitigate supply/demand imbalances and provide additional dry-year supply sources. In addition, MWD has developed significant storage capacity in reservoirs, conjunctive use, and in 2019, approximately 750,000 AF of total stored water is emergency storage reserved by MWD for use in the event of supply interruptions. -going water supply and storage programs and management practices, the City will use up to the treated imported water supply made available from MWD through WFA in association with each of the standard water shortage levels identified in Section 8.5. Water demands will be addressed through increased use of the local groundwater supplies and implementation of demand reduction measures through the various stages of action. The City will consider augmenting its existing water supplies through production of additional groundwater from the Chino Basin. As noted in Section 6, the Chino Basin is managed under the Chino Basin adjudication. During the period of management under the Chino Basin Judgment, significant drought events have occurred. In each drought cycle the Chino Basin has been managed to maintain water levels. Parties to the Chino Basin Judgment, including the City, are authorized to produce groundwater in excess of their rights and pay assessments for such production to the Chino Basin Watermaster. The assessments are used to purchase untreated imported water to replenish the Chino Basin. The Chino Basin Watermaster purchases untreated imported water to replenish the Chino Basin from MWD through IEUA. Groundwater quality is carefully monitored by the Chino Basin Watermaster. Treatment facilities and/or blend plans have been developed by water agencies to meet potable water standards and to prevent the spread of any groundwater contamination. Groundwater quality in the Chino Basin is not expected to impact potable supplies or constrain supply reliability. Based on historical and on-going management practices, the City will be able to continue relying on the Chino Basin for adequate supplies in response to each of the standard water shortage levels identified in Section 8.5. 8.6.3 Operational Changes During a water supply shortage situation, the City will manage its water supply resources to provide sufficient water supplies capable of meeting the demands of its customers. Section 8.6.1 measures. Section 8.6.2 augmentation actions available. The supply augmentation actions and demand reduction measures, when implemented, may potentially result in short-term operational changes which are necessary to allow the City to utilize all available water supply sources in response to water shortage situations. 679
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As noted in Section 8.4, the City prepares and submit an Annual Assessment which will include a review of the water supplies available to meet water demands for the current and upcoming years. Preparation of the Annual Assessment will assist the City in determining any potential operational changeMMs (discussed in Section 9), will be essential to the City in reducing water demands during any water shortage period. The operational changes the City will consider in addressing non-catastrophic water shortages on a short-term basis include the following: Improved monitoring, analysis, and tracking of customer water usage to enforce demand reduction measures Optimized production from existing available water supply sources Potential use of emergency supply sources, including emergency interconnections Potential blending of water supply resources Improved monitoring, maintenance, and repairs to reduce water distribution system losses 8.6.4 Additional Mandatory Restrictions The mandatory restrictions which are implemented by the City to reduce customer demands are discussed in Section 8.6.1. There are no additional mandatory restrictions planned at this time. 8.6.5 Emergency Response Plan (identified in 8.5) and the associated demand reduction measures (described in Section 8.6.1). In addition to the water supply augmentation actions (Section 8.6.2) and potential operational changes (Section 8.6.3) which the City may consider in order to continue providing sufficient water supplies, the City will review and implement any necessary steps included in its (ERP). population greater than 3,300 people, including the City, are required to review and update their very five (5) years. However, due to security concerns regarding the submitting of these reports, water systems are required to submit certifications to the United States Environment Protection Agency (USEPA), from March 31, 2025 and December 30, 2026, confirming the current RRA and ERP have been reviewed and updated. rch 2025, evaluates the vulnerabilities, threats, and (which is incorporated by reference) by evaluating the following items: Natural hazards and malevolent acts (i.e., all hazards); 680
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Resilience of water facility infrastructure (including pipes, physical barriers, water sources and collection, treatment, storage and distribution facilities, and electronic, computer and other automated systems); Monitoring practices; Financial systems (e.g., billing systems); Chemical storage and handling; and Operation and maintenance. consequences to both the water system and surrounding region, and the likelihood of -effectiveness of implementing potential countermeasures to reduce risks was also reviewed. March 2025, provides the management, procedures, and designated actions the City and its employees will implement during emergency situations (including catastrophic water shortages) resulting from natural disasters, system failures and other unforeseen circumsthe guidelines for evaluating an emergency situation, procedures for activating an emergency response, and details of the different response phases in order to ensure that customers receive a reliable and adequate supply of potable water. The scope of the ERP includes emergencies which directly affect the water system and the ability to maintain safe operations (such as a chlorine release, and earthquake or a threat of contamination). The ERP also incorporates the Strategies and resources to improve resilience, including physical and cybersecurity Plans and procedures for responding to a natural hazard or malevolent act Actions and equipment to lessen the impact of a natural hazard or malevolent act Strategies to detect natural hazards or malevolent act The City will review the ERP for procedures regarding the utilization of alternative water supply sources in response to water supply shortages, including during the standard water shortage levels. The City will also review applicable procedures described in the ERP regarding any necessary temporary shutdown of water supply facilities, including appropriate regulatory and public notifications. 8.6.6 Seismic Risk Assessment and Mitigation Plan Emergency Management Agency (FEMA) in 2023. The Hazard Mitigation Plan identifies effective ways to assess the significant natural hazards (including earthquakes) that may affect the City and its residents. The Hazard Mitigation Plan provides resources, information, and coordination of mitigation activities throughout the City. The Hazard Mitigation Plan includes facilities (including its distribution system pipelines, groundwater wells, booster pumps, and 681
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Mitigation Plan is provided in Appendix G.-was approved by the FEMA in 2023 (San Bernardino County, 2023)-Jurisdictional Hazard Mitigation Plan identified methods to assess significant natural hazards (including earthquakes) affecting areas throughout San Bernardino County, and the mitigation strategies necessary to reduce risks, including seismic risk. The Countlocated in Appendix H.The California Geological Survey has published the locations of numerous faults which have been mapped in the Southern California region. Although the San Andreas fault is the most recognized and is capable of producing an earthquake with a magnitude greater than 8 on the Richter scale, some of the lesser-known faults have the potential to cause significant damage. provided in the Figure 8-1 below. The faults that are located in close proximity to and could fault, the Walnut Creek fault, the San Jose fault, the Red Hill fault, the Cucamonga fault, the Chino fault, the Rialto-Colton fault and the Central Avenue fault. As discussed in Section 6, the faults which border the Chino Basin include the Rialto-Colton fault, the Chino fault, the San Jose fault, and the Cucamonga fault.Figure 8-1- Location of Earthquake Faults Source: (California Geological Survey, 2026)The following Figure 8-2 provides the relative intensity of ground shaking in the vicinity of the -period Ontario
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-period shaking affects tall, relatively flexible buildings, but also correlates with earthquake damage. The shaking potential is calculated based on the level of ground motion that has a 2 percent chance of being exceeded in 50 years (or the level of ground-shaking with an approximate 2,500-year average repeat time). As discussed in Section 8.6.5, the City has prepared an ERPwhich provides the management, procedures, and designated actions the City and its employees will implement during emergency situations resulting from natural disasters, including during earthquakes, to ensure that customers receive a reliable and adequate supply Figure 8-2- Earthquake Shaking Potential Source: (California Geological Survey and USGS, 2016)8.6.7 Shortage Response Action EffectivenessThe effectiveness of the shortage response actions for each of the standard water shortage levels identified in Section 8.5water demands in response to a water supply shortage. In addition, the City imposes water consumption regulations and restrictions, and supports local agencies in efforts to enforce regulresponse actions, in order to reduce any potential gaps between supply and demand, has been quantified in the expected demand reduction provided in Table 8-2.

Ontario
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supply source. During the past 15 years, the City experienced a five-year consecutive drought within its service area from FY 2011-12 to FY 2015-16. Throughout this extended dry year average of approximately 41,558 AF. In addition, historical records indicate the City previously produced a maximum of up to 45,196 AF during FY 2013-14. The City has been able to provide sufficient water supplies to its customers, including during long-term droughts and years with historically high water demands. In addition, the City has been able to provide water service to meet maximum day water demands for these years, including during the summer months. -21 to FY 2024-25) averaged approximately 31,743 AFY. Due to conservation efforts and DMMs (discussed in Section including during long-dry, and multiple dry years) are provided in Section 7 and are anticipated to incorporate similar reductions in water use rates as a result of the shortage response actions, ongoing conservation efforts, and DMMsuse rates, it is anticipated the City will be able to continue providing sufficient water supplies to its customers to meet projected water demands, including during long-term droughts. In addition, based on historical and on-going management practices, the City will be able to continue relying on its water supply source from the Chino Basin for adequate supply augmentation in response to each of the standard water shortage levels identified in Section 8.5. shortages, the adopted water shortage levels, the adjusted operating safe yields, and water supplies during long-term droughts, it is anticipated that the City will be able to provide sufficient water supplies to its customers during each of its standard water shortage levels. Although adequate supplies are anticipated, the cost of those water supplies may become incrementally more expensive. The City will enact varying stages of its WSCP to encourage retail customers to reduce water consumption and at the same time reduce the need to use the more expensive actions, in order to reduce any potential gaps between supply and demand, has been quantified in the expected demand reduction section provided in Table 8-22015 Executive Order B-29-15 which mandated statewide reduction in water use of 25 percent. 2, 3, 4, 5, and 6 are expected to reduce water demands by up to 10%, 20%, 30%, 40%, 50%, and greater than 50%, respectively. 684
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8.7 Communication Protocols Upon finding that a need to implement a Stage 1 through Stage 6 Water Supply Shortage exists, the City Council will order implementation of the appropriate water shortage response action, or other measures which it deems appropriate to address the water shortage. This order shall be made by Resolution and will be published in a daily newspaper of general circulation and will become effective immediately following publication. The appropriate regulations that fall under the Stage Level declared will take effect with the first full billing period commencing on or after the effective date of the City Council's Resolution. In the event of an immediate emergency that causes an unplanned interruption of water supply, the City Manager or his/her designee is authorized to restrict water use and apportion the available supply of water among its customers in the most equitable manner possible to continue service fairly and without discrimination, except that preference shall be given to such service as is essential to the public interest and to the preservation of life and health. 8.8 Compliance and Enforcement to comply with the prohibitions and restrictions of each water supply shortage stage. All fines and penalties may apply to each of the prohibitions and restrictions of each water supply shortage stage. If a customer is found to be in violation of any water supply shortage stage provision, fines begin with a written notice and subsequent violations include fines of $100, $200, and $500. 8.9 Legal Authorities The City has the legal authority to implement and enforce its WSCP. California Constitution article X, section 2 and CWC section 100 provide that water must be put to beneficial use, the waste or unreasonable use or unreasonable method of use of water shall be prevented, and the conservation of water is to be exercised with a view to the reasonable and beneficial use thereof in the interest of the people and the public welfare. In addition, CWC Section 375 provides the City with the statutory authority to adopt and enforce water conservation restrictions, and CWC Section 350 et seq. authorizes the City to declare a water shortage emergency and impose water conservation measures when it determines that the City may not be able to satisfy ordinary demands without depleting supplies to an insufficient level. If necessary, the City shall declare a water shortage emergency in according with CWC Chapter 3 (commencing with Section 350) of Division 1. Once having declared a water shortage, the City is provided with broad powers to implement and enforce regulations and restrictions for managing a water shortage. No. 3027, a water shortage, including a water shortage emergency but excluding an immediate emergency, shall be declared by the adoption of a resolution of the City Council, in accordance 685
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with CWC section 350. The City Council may declare a water shortage based on a determination by the MWD and the IEUA of a water shortage, the declaration of an executive order of the Governor or the adoption of voluntary or mandatory water use restrictions by any State Agency governing the use of water or based upon any interruption in water supply or delivery that the City Council determines in its sole discretion necessitates water conservation pursuant to this chapter. Under California law, including CWC Chapters 3.3 and 3.5 of Division 1, Parts 2.55 and 2.6 of Division 6, Division 13, and Article X, Section 2 of the California Constitution, the City is authorized to implement the water shortage actions outlined in this Ordinance No. 3027. In water shortage cases, shortage response actions to be implemented will be at the discretion of the City and will be based on an assessment of the supply shortage, customer response, and need for demand reductioOrdinance No. 3027. It is noted 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 state will defer to implementation of locally adopted WSCPs to the extent practicable. The City will coordinate with the County and any other entities as necessary for possible proclamation of a local emergency as necessary under California Government Code, California Emergency Services Act (Article 2, Section 8558). In the event of an immediate emergency that causes an unplanned interruption of water supply, the City Manager or his/her designee is authorized to restrict water use and apportion the available supply of water among its customers in the most equitable manner possible to continue service fairly and without discrimination, except that preference will be given to such service as is essential to the public interest and to the preservation of life and health. At any time during Stage 1, 2, 3, 4, 5, or 6, if the City Council determines that additional reductions in the amount the potable water being used by water customers are necessary, it may adopt a resolution establishing water use limitations and enforce those water use limitations by the adoption and imposition of a volumetric penalty established therein. 8.10 Financial Consequences of WSCP Potential revenue reductions and expense increases associated with activated shortage During periods of water supply shortages, state-mandated water use restrictions, or emergency conditions, the City may require its customers to reduce demands below levels projected under the current water rate structure. Under any of these circumstances, the City may experience a decrease in revenues. In order to offset any decline in revenues, the City Council may adopt costs to provide water to its customers. 686
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Projected demands, water supply reductions, water rates and cost of water cannot be known with certainty. However, even under a hypothetical scenario whereby sales are gradually reduced by up to 50 percent, certain actions are known as noted below: Water supplies: CDA supplies will not be impacted from a quantity or cost standpoint. As demands/sales are reduced, the City will rely on its least expensive sources of supply first and sequentially reduce the most expensive sources of water supply (i.e. imported water). This action will address much of the gap between reduced revenue from water sales and the cost of the water supplies. As sales are reduced, distribution system losses will also be reduced on a proportional basis resulting in savings by not having to provide as much water. Revenue from water sales: Revenue from the monthly standby charge to each retail customer will remain constant regardless of the volume of water sold. The City will regularly track the impacts of potentially reduced water sales on revenue and severely affected by a water shortage, the following measures could be taken by the City to alleviate the financial impacts before there has been a significant draw on financial reserves: Rate Adjustment Decrease in Capital Expenditure Decrease in O&M Expenditure Rate increases are not viewed positively by the customers particularly when they reduce consumption. Negative consequences that could arise from the cost-cutting actions include dissatisfaction of the customers, reduced funding for Capital Improvement Projects and system maintenance, and reduced staff availability for emergency response. Nonetheless, these tools are available to the City in a worst-case scenario to ensure a constant balance between revenue and expenses. 8.11 Monitoring and Reporting The City regularly monitors water supply and consumption throughout the service area, including annual Distribution System Water Audits to monitor real and apparent losses, ensuring customer compliance with the provisions in the WSCP. During water supply shortages, City staff accounting system. Losses are monitored by comparing water production to sales. City staff regularly monitor the system and repairs leaks in a timely manner. Rates of consumption will be consumption during non-shortage periods. In the event system-wide monitoring indicates water use reduction targets are not met, City staff may perform a more detailed review and comparison against normal water use rates for specific water use categories. Outcomes of the 687
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categorical review may include additional targeted outreach/communication to categories that have not achieved the appropriate reduction and/or identification of specific meters/users for additional records review. 8.12 WSCP Refinement Procedures Section 8.11, the City will monitor and report on the implementation of the WSCP. The City will review the implementation results for any current or potential shortage gaps between water supplies and demands. The City will evaluate the need for revising the WSCP in order to resolve any shortage gaps, as necessary. The City will consider the following potential revisions in the event of a potential shortage gap: Implementation of additional public outreach, education, and communication programs (in addition to the programs discussed in Section 9). Implementation of more stringent water use restrictions under the standard water shortage levels (discussed in Section 8.5). Implementation of stricter enforcement actions and penalties (discussed in Section 8.8). Improvements to the water supply augmentation responses (discussed in Section 8.6.2), as well as any associated operational changes (discussed in Section 8.6.3) which may be required. Incorporation of additional actions recommended by City staff or other interested parties. The City will use the monitoring and reporting data to evaluate the ability for these potential revisions to resolve any shortage gaps which may occur within the standard water shortage levels. UWMP adoption process discussed in Section 10. It is anticipated the City will review, revise, and adopt an updated WSCP as part of preparing its 2025 UWMP as necessary. However, the City will continue to review the monitoring and reporting data, and if needed, update the WSCP more frequently. Any updates Section 8.14). 8.13 Special Water Feature Distinction supplied with water, including ponds, lakes, waterfalls, and fountains, but excluding pools and spas. In general, there are additional health and safety considerations in the water supplied to reviewed the response actions, enforcement actions, and monitoring and reporting programs separately for decorative water features and for pools and spas, as applicable. As described in Section 8.6.1, under a Stage 1 Water Supply Shortage Level, no water shall be used to clean, fill or maintain levels in decorative fountains, ponds, lakes or other similar aesthetic structures unless such water is part of a recycling system. 688
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8.14 Plan Adoption, Submittal, and Availability UWMP adoption process discussed in Section The City will conduct a public hearing and make the WSCP available for public inspection. The City will provide notification of the time and place of the public hearing to any city or county in which water is provided. The City will publish notice of public hearing in a newspaper once a week, for two successive weeks (with at least five days between publication dates). The City Council will adopt the 2025 UWMP and the WSCP. As part of submitting the 2025 UWMP to DWR, the City will also submit the WSCP July 1, 2026. The City will submit a copy of the WSCP to the California State Library and to any city or county in which water is provided within 30 days of adoption. In addition, the City will make the WSCP available for public review within 30 days of adoption. If there are any subsequent amendments required, the process for adopting an amended WSCP includes the following: The City will conduct a public hearing and make the amended WSCP available for public inspection via public City Council agendas. The City Council will adopt the amended WSCP. submittal tool) within 30 days of adoption. (and 2025 UWMP) is provided in Section 10. 689
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9Demand Management Measures This section describes the Cityefforts to promote WUE, reduce demand on the water supply, and prepare for future requirements through implementation of DMMs.

I N T HIS S E CTI ON Existing Demand Management Reporting Implementation Water Use Objectives 690
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9.1 Introduction This section describes the DMMs that the City has implemented for the past five years, current initiatives, and future plans to meet State efficiency standards from DWR. The City coordinates and partners with IEUA and CBWCD regional programs, and rebate program, the SoCal Water$mart Program. There are rebates available for the purchase of high-efficiency clothes washing (HECW) machines, premium high-efficiency toilets (PHET), weather-based irrigation controllers (Smart Controllers), rain barrels, rain cistern, and turf removal to promote water conservation. The City provides information about these programs to customers on its website. The City is also a member of the Water Education/Water Awareness Committee (WEWAC) whose mission is to promote efficient water use and increase public awareness of the importance of water in Southern California. WEWAC offers grants for teachers who complete water conservation related projects, a scholarship contest for high school students and a media contest open to multiple grade levels. 9.2 Existing Demand Management Measures for Retailers Table 9-1 are addressed in this chapter. Table 9-1- Demand Management Measures Measure 1 Water Waste prevention Ordinances 2 Metering 3 Conservation Pricing 4 Public Education and Outreach 5 Programs to access and manage distribution system real loss 6 Water conservation program coordination and staffing support 7 Other demand management measures 691
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9.2.1 Water Waste Prevention Ordinances Waste is defined as any excessive, unnecessary or unwarranted use of water, including but not limited to any use which causes unnecessary runoff beyond the boundaries of any property as served by its meter and any failure to repair as soon as reasonably possible any leak or rupture in any water pipes, faucets, valves, plumbing fixtures or other water service appliances. The City adopted Ordinance No. 3027 in October 2015 and Ordinance 3196, effective December 7, 2021, to establish water conservation measures, staged water supply shortage DMMs, and prevent water waste. To comply with requirements set forth by Assembly Bill 1572, the City will update Municipal ordinance language to include banning the use of potable water on nonfunctional turf located at Commercial, Industrial, and Institutional (CII) properties. The voluntary conservation stage of "The Water Conservation Plan of the City of Ontario" includes the following actions: (a) All persons are encouraged to voluntarily limit the amount of water used to the amount absolutely necessary for health and safety, business operations, and irrigation. Except as otherwise provided in this chapter where a declared water shortage stage or water shortage emergency requires mandatory or other more stringent requirements, the following elements of conservation apply at all times on a voluntary basis by all persons within the City: (1) Avoid hose washing of sidewalks, walkways, driveways, parking areas or other paved surfaces, except as required for sanitary purposes. If a person uses a hand-held hose to wash any sidewalk, walkway, driveway, parking area or other paved surface, the hose shall be equipped with a positive shutoff nozzle. (2) Wash motor vehicles, trailers, boats and other types of mobile equipment using a hand held bucket or a hose equipped with a positive shutoff nozzle for quick rinses, or at the immediate premises of a commercial car wash or with recycled wastewater for approved uses. (3) Avoid using water to clean, fill or maintain levels in decorative fountains, ponds, lakes or other similar aesthetic structures unless such water is part of a recycling system. (4) Encourage restaurants, hotels, cafés, cafeterias or other public places where food is sold, served or offered for sale, to serve drinking water only to those customers expressly requesting water. (5) Promptly repair all leaks from indoor and outdoor plumbing fixtures. (6) Avoid watering lawn, landscape or other turf areas between 6:00 a.m. and 6:00 p.m. (7) Avoid causing or allowing the water to run off landscape areas into adjoining streets, sidewalks or other paved areas due to incorrectly directed or maintained sprinklers or excessive watering. 692
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9.2.2 Metering The City meters all customer connections, including separate metering for single-family residential, commercial, industrial, large landscape and institutional/governmental facilities. Furthermore, if there is new development within the City, each facility is individually metered. 9.2.3 Conservation Pricing The City implemented new water rates on November 1, 2025. Water service is billed monthly, SFR Potable customers, the Commodity Charge consists of three tiers, which imposes higher rates per unit of water as the level of consumption increases. The water rates have been developed to fund the cost of water and are related to the overall cost of water service. 9.2.4 Public Education and Outreach The City developed a public information program to educate the public to the benefits of water conservation. The program involves the dissemination of information through literature provided at City Hall and other City facilities, and articles in the City newsletter. The City includes informational flyers with the water bills periodically to address water conservation and other important matters. The City periodically holds public seminars and workshops with other local agencies to promote water conservation. The City also provides water conservation information and updates on its website. WUE Program, member agencies, including the City, are encouraged to adopt approaches and technologies to encourage customers to increase water efficiency. Water conservation staff attended City events and educated the public about waterconservation programs.Utility newsletters and drought updates were sent out to all customers.Utility bill inserts and messaging were used for outreach efforts.Water conservation workshops were conducted to educate customers about droughttolerant plants and landscape design.Conservation staff visited school classrooms to educate students about waterconservation.Social media messaging has continuously been used to notify the public about waterconservation programs.Many education and public outreach programs adapted to online alternatives during FY 2020/21 and 2021/22 due to COVID-19. During that time IEUA developed multiple virtual alternatives -day, digital at-home activity guide, a series of At-Adventures - a series of free, online resources, and a Virtual Earth Week. A summary of total IEUA program participation, not limited to the City, is provided in Table 9-2. 693
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Table 9-2- IEUA Public Education and Outreach Programs Program 2021 2022 2023 2024 2025 Water-saving technologies/ services Owlie's Virtual Adventures 4,595 11,221 19,360 15,250 Discover the Environment and Water (DEW) Field Trip Owlie's Virtual Adventures Owlie's Virtual Adventures 1,946 2,350 2,086 Water Scout Badge Program 51 60 Annual Earth Day Student Day (includes K-5 students, chaperones, and educators) Virtual due to COVID-19 Virtual due to COVID-19 700 1,107 1100 Annual Earth Day (includes community members, scout troops, and after-school program participants) Virtual due to COVID-19 Virtual due to COVID-19 1000 964 860 Virtual Earth Week 5,000 page views / 500 students 8,100 page views / 450 students Virtual Adventures 1,000 students 1,500 students Water is Life Annual Poster Contest entries 800 522 Water Engineering 4 Good (WE4G) (previously Solar Cup) participants Chino Hills High School Chino Hills, Colony High School, Upland High School Chino Hills High School, Upland High School Vina Danks Middle School National Theatre for Children (NTC) School assembly performances 16 virtual 14 live stream performances 69 71 59 Schools 38 52 37 37 36 Students 18,051 20,527 14,893 14,373 10,690 Teachers 823 567 577 542 Source: (Inland Empire Utilities Agency, 2025) Note: IEUA Programs are not limited to Ontario. The data reported here are inclusive of all IEUA programs for this period. 9.2.5 Programs to Assess and Manage Distribution System Real Losses Water loss control efforts are a main component of the water system operations. Pipeline leaks and breaks are repaired as soon as possible to minimize water loss. The City monitors distribution system water loss by preparing an annual AWWA Water Audit to estimate real and apparent losses as described in Section 4.2.3. In 2025, the City signed a five-year contract for zero-discharge flushing (ZDF) services. The process claims that by eliminating traditional flushing volumes, Ontario will reduce non-revenue water by an estimated 15 to 20 acre-feet per year (Hydrologics, Inc., 2025). As a part of normal operation and maintenance of the water system, City staff does preventive maintenance. This includes regular checks on valves and meters, and pipeline maintenance. If 694
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leaks are encountered or suspected during routine inspection of the system, further evaluation is conducted. If leaks are found, they are repaired. 9.2.6 Water Conservation Program Coordination and Staffing Support Various City departments are involved in the water conservation program. These include maintenance and operations personnel, the Utilities General Manager, the Public Works Director, and administrative staff who answer billing and usage questions and serve at the front counter at City Hall. In addition, the City employs a full time Water Resources Coordinator to oversee all water conservation activities. The Water Resources Coordinator is responsible for all matters pertaining to the City's water conservation program including implementation of DMMs. 9.2.7 Other Demand Management Measures CBWCD Landscape Evaluation Audit Program: Provides an irrigation audit to Ontario residents and businesses at no cost. Residential Irrigation System Enhancement Program (RISE): includes basic irrigation repairs and the direct installation of smart controllers to help make irrigation systems more efficient. Water Softener Rebate Program: through IEUA customers may receive a rebate to remove self-regenerating water softeners. Turf Replacement Program: provides a rebate to Ontario residents and businesses for replacing turf with drought tolerant plants. Rebate Programs: provides rebates to Ontario residents and businesses for water efficient devices. 9.3 Reporting Implementation 9.3.1 Implementation over the Past Five Years The City is committed to implementing water conservation programs. The highlights of DMM implementation over the past five years are summarized in Table 9-3. 695
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Table 9-3- City of Ontario Program Participation FY 21-25 SoCal Water$mart Residential Rebates 2021 2022 2023 2024 2025 Total High Efficiency Toilets (HET) 17 8 245 154 74 498 High Efficiency Clothes Washers (HECW) 203 193 159 182 69 806 Rotating Nozzles for Pop-up Spray Heads 30 29 78 Weather based Irrigation Controllers (WBIC 43 19 82 86 28 239 Weather based Irrigation Controllers for Large Landscapes 2 (1 station) 2 Irrigation Controller + Add on 2 2 Hose Bib Controller 1 1 Turf Replacement (sq. ft.) 18,213 10,408 26,527 38,266 13,112 106,526 Rain Barrels 2 8 8 18 Low-flow Showerheads 111 1,758 1,082 2,951 Faucet Aerators 157 788 601 1,546 IEUA Locally Implemented Residential Programs 2021 2022 2023 2024 2025 Total Landscape Tune-Up Program 210 287 154 163 131 945 Nozzles 1,010 1,003 821 2,834 Residential Landscape Retrofit Program 15 14 29 WBIC 21 20 41 Nozzles 186 32 218 Large Landscape Retrofit Program 16 12 4 32 WBIC 19 15 5 39 Nozzles 16 16 Small Site Controller Upgrade Program 99 96 81 276 WBIC 108 109 100 317 Res. Education, Survey, and Controller Upgrade Program 138 148 286 WBIC 157 173 330 Residential Pressure Regulation Program 21 10 31 696
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SoCal Water$mart Commercial Rebates 2021 2022 2023 2024 2025 Total High Efficiency Toilets (HET) 205 205 Irrigation Controller + Add on Cooling Tower Controller 6 6 Weather Based Irrigation Controllers (WBIC) for large landscapes 5 1 6 Stations 112 8 120 Central Computerized Irrigation Controller 7 7 Stations 163 163 Laminar Flow Restrictor 66 66 Turf Replacement (sq. ft.) 213,618 24,041 42,535 170,371 248,508 699,073 Plumbing Flow Control 10 10 Additional Water Use Efficiency Programming 2021 2022 2023 2024 2025 Total CBWCD Landscape Evaluation Audit Program 10 16 7 8 41 Source: (Inland Empire Utilities Agency, 2025) 9.3.2 Implementation to Achieve Water Use Targets As discussed in Section 5, Ontario met its SBX7-7 2020 target. Most recently, in 2025, the water use was 158 GPCD, which is well below the 2020 target of 196 GPCD. WUE standards from the MCCWL Regulation supersede SBX7-7 standards. Water agencies, including the City, have been reporting on compliance since 2024. Continued implementation of these DMMs will assist the City in meeting future water use targets and objectives. The City will continue to implement these DMMs and other water conservation programs and work collaboratively with IEUA and MWD to provide water conservation programs for its residents. 697
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10Plan Adoption, Submittal, and Implementation This section describes the steps taken to make the UWMP publicly available as well as adopt and submit the UWMP in accordance with the CWC.

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10.1 Completed Steps for UWMP and WSCP As discussed in Section 2.3, Ontario coordinated the preparation of the 2025 UWMP with the following agencies: City of Montclair City of Jurupa Valley City of Fontana City of Eastvale City of Chino City of Chino Hills City of Upland City of Rancho Cucamonga City of Pomona County of San Bernardino Chino Basin Desalter Authority Chino Basin Watermaster Cucamonga Valley Water District Fontana Water Company Inland Empire Utilities Agency Jurupa Community Services District Metropolitan Water District Monte Vista Water District San Antonio Water Company Santa Ana Watershed Project Authority Water Facilities Authority Ontario notified these agencies, as well as the cities and county within which Ontario provides water supplies, at least sixty (60) days prior to the public hearing of the preparation of the 2025 UWMP and WSCP and invited them to participate in the development of the UWMP and WSCP. A copy of the notification letters sent to these agencies is provided in Appendix E. The UWMP and WSCP were made available for public review in May/June 2026 and a public hearing was held on June 2, 2026 to receive public input on the draft documents. City Council adopted the 2025 UWMP and the WSCP at a public meeting on June 2, 2026. The resolution of adoption is included as Appendix D. This UWMP and WSCP were submitted to DWR through the WUEdata portal before the deadline of July 1, 2026. This UWMP and WSCP are available to the public on the Ontario website. 699
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If Ontario identifies the need to amend this UWMP or WSCP, it will follow the same procedures used previously for notification to cities, counties, and the public and for initial adoption. 10.2 Plan Submittal City Council adopted the 2025 UWMP on June 2, 2026 and within 30 days, Ontario submitted the adopted 2025 UWMP (including the WSCP) to DWR. The 2025 UWMP and DWR developed a checklist which was used by Ontario to assist DWR with its determination completed the DWR checklist by indicating where the required CWC elements can be found Appendix I). Within 30 days of adoption of the 2025 UWMP, including the WSCP, Ontario submitted copies of the adopted UWMP to the San Bernardino County AssessorRecorder/Clerks Office, and California State Library in accordance with CWC requirements. 10.3 Public Availability Within 30 days after submittal of the 2025 UWMP to DWR, Ontario made the 2025 UWMP (including the WSCP) available at OntariOntario 10.4 Amending an Adopted UWMP or WSCP If Ontario amends the adopted 2025 UWMP (and/or the WSCP), the amended UWMP or WSCP will undergo adoption by OntarioCity Council. Within 30 days of adoption, the amended UWMP will then be submitted to DWR, the State of California Library, and the County of San - 700
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References AKM Consulting Engineers. (January 2026). City of Ontario Water Master Plan. California Department of Conservation. (2025, July 23). Fault Activity Map of California. Retrieved from DOC Maps: Geologic Hazards: https://www.conservation.ca.gov/cgs/publications/ms48 California Geological Survey. (2026). Fault Activity Map of California. Retrieved from https://maps.conservation.ca.gov/cgs/fam/App/ California Geological Survey and USGS. (2016). Earthquake Shaking Potential for California. Chino Basin Optimum Basin Management Program. (2018). State of the Basin Report. City of Ontario. (2021). Ontario Municipal Code. Retrieved from https://codelibrary.amlegal.com/codes/ontarioca/latest/ontario_ca/0-0-0-44148 Department of Water Resources. (2025). Urban Water Management Plan Guidebook . Governments, S. C. (2024). Connect SoCal Regional Transportation Plan (RTP). Southern California Association of Governments. Hydrologics, Inc. (2025, September 30). City of Ontario, California Signs Five-Year Agreement with Hydrologics Inc. to Implement Zero-Discharge Flushing for Municipal Water System. Retrieved from Hydrologics, Inc.: https://www.hydrologics.com/news/city-of-ontario-california-signs-five-year-agreement-with-hydrologics-inc-to-implement-zero-discharge-flushing-for-municipal-water-system/ Inland Empire Utilities Agency. (2025). Annual Reports. Chino Hills, CA: Inland Empire Utilities Agency. Retrieved from https://www.ieua.org/read-our-reports/annual-reports/ Inland Empire Utilities Agency. (2025). Regional Water Use Efficiency Programs Report. Chino Hills, CA: Inland Empire Utilities Agency. Retrieved from https://www.ieua.org/read-our-reports/water-use-efficiency-reports/ San Bernardino County. (2023). San Bernardino County Multi-Jurisdictional Hazard Mitigation Plan. Retrieved from ResiliantCA.org: https://resilientca.org/projects/99190499-717b-43f3-9bbd-0c014c2d00f1/ Southern California Association of Governments. (2021). RHNA 6th Cycle Allocation Plan. State of California Department of Water Resources. (2021). State of California Department of Water Resources. (2021). 701
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Appendix A DWR Tables
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Appendix B Delta Plan
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Regional Self-Reliance Consistency Statement San Joaquin Delta and improved regional water self-reliance are reflected in the regional analysis prepared by collective investments and actions of IEUA and its customer agencies, including Ontario, and documents measurable progress toward increased regional self-reliance and reduced dependence on Delta supplies at the regional scale. Consistent with DWR guidance, regional coordination and reliance on wholesale and regional planning documents are appropriate where data are developed at a broader service area or where individual supplier contributions cannot be discretely quantified. Due to the integrated nature of regional water supply systems and the infeasibility of analysis provides the appropriate basis for demonstrating consistency with Delta Plan Policy WR P1. Accordingly, Ontario incorporates the IEUA regional reduced reliance analysis by -effective and technically feasible demand management measures and supply programs, as described in this UWMP, contributes to the regional outcomes documented by IEUA and supports ongoing progress toward improved regional self-reliance and reduced reliance on Delta supplies. 705
City of Ontario Appendix C
2025 Urban Water Management Plan - Draft | C
Appendix C Public Hearing Notices
706
707
City of Ontario Appendix D
2025 Urban Water Management Plan - Draft | D
Appendix D Adoption Resolution
708
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City of Ontario Appendix E
2025 Urban Water Management Plan - Draft | E
Appendix E 60 Day Notification Letters
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City of Ontario Appendix F
2025 Urban Water Management Plan - Draft | F
Appendix F Chino Basin Judgement
753

The Chino Basin 1978 Judgement can be found here.
754
City of Ontario Appendix G
2025 Urban Water Management Plan - Draft | G
Appendix G City of Ontario 2023 Local Hazard Mitigation Plan 755
The can be found here.
756
City of Ontario Appendix I
2025 Urban Water Management Plan - Draft | H
Appendix H San Bernardino County Multi-Jurisdictional Hazard Mitigation Plan 757

The San Bernardino Count 2023 Multi-Hazard Mitigation Plan can be found here. 758
City of Ontario Appendix I
2025 Urban Water Management Plan - Draft | I
Appendix I DWR Checklist
759
Retail (x = required)Wholesale(x = required)Order2025 Guidebook LocationWater Code Sectionx x 1 Chapter 1 10615A plan shall describe and evaluate sources of supply, reasonable and practical efficient uses, reclamation and demand management activities.x x 1 Chapter 1 10630.5Each 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.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.x n/a 2.5 Section 2.5 10644Supplier shall report the Public Water Systems number, volume of delivered water, and number of connections that are included in this UWMP.x x 2.5 Section 2.5 10644Supplier shall report if this UWMP is an individual UWMP and whether the Supplier belongs to a regional UWMP or regional alliance.x x 2.5 Section 2.5 10644Supplier shall report whether the data is in fiscal or calendar years and the units of measure used for reporting water volumes.x x 2.4 Section 2.4 10642Provide supporting documentation that the Supplier has encourageeconomic elements of the population within the service area prior to and during the preparation of the plan and contingency plan.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.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.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.x x 3 Chapter 3.0 10631(a)Describe the Supplier service area.x x 3.3 Section 3.3 10631(a)Describe the climate of the Supplier’s service area.x x 3.4 Section 3.4.1 10631(a)Provide the current and projected service area populations for 2030, 2035, 2040, 2045 and optionally 2050.x x 3.4 Section 3.4.2 10631(a)Describe other social, economic, and demographic factors affecting the Supplier’s water management planning.x x 3.5 Section 3.5 10631(a)Describe the land uses within the service area… include the current and projected land uses within the existing or anticipated service area affecting the Supplier’s water management planning. Describe the land uses within the service area.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.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.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.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.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.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.x n/a 4.2 Section 4.2.5.3 10631(d)(4)(B)(ii)To the extent that a Supplier reports the information described in subparagraph (A), an urban water Supplier shall… Indicate the extent that the water use projections consider savings from codes, standards, ordinances, or transportation and land use plans. Water use projections that do not account for these water savings shall be noted of that fact.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.n/a x 5.1 Section 5.1 10608.36Wholesale Suppliers shall include an assessment of present and proposed future measures, programs, and policies to help their Retail Suppliers achieve targeted water use reductions.x n/a 5.2 Section 5.2 10608.4Retail 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.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.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.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.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. 760
Retail (x = required)Wholesale(x = required)Order2025 Guidebook LocationWater Code Sectionx 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.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.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.x 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.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.x n/a 6.2 Section 6.2.5 10633(a)Describe the wastewater collection and treatment systems in the Supplier’s service area with quantified amount of collection and treatment and the disposal methods.x 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.x x 6.2 Section 6.2.5 10633(c)Describe the recycled water currently being used in the Supplier's service area.x 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.x 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.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.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.x x 6.2 Section 6.2.6 10631(g)Describe desalinated water project opportunities for long-term supply.x 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.x x 6.3Section 6.3 and Appendix O10631.2(a)The UWMP must include energy information, as stated in the code, that a Supplier can readily obtain.x 7.1 Section 7.1 10634Provide 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.x 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.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.x 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.x 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.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.x 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.x 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.x x 8 Chapter 8 10632(a)Provide a water shortage contingency plan (WSCP) with specified elements below.x x 8 Chapter 8 10632(a)(1)Provide an analysis of water supply reliability (from Guidebook Chapterx 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.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.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.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.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.x x 8.4 Section 8.4 10632(a)(4)(B)Specify locally appropriate demand reduction actions to adequately respond to shortages. 761
Retail (x = required)Wholesale(x = required)Order2025 Guidebook LocationWater Code Sectionx x 8.4 Section 8.4.6 10632.5The UWMP shall include a 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.x x 8.5 Section 8.510632(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.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.x x 8.7 Section 8.7 10632(a)(7)(A)Describe the legal authority that empowers the Supplier to enforce shortage response actions.x 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 ChapterShortage Emergencies.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.x x 8.8 Section 8.8 10632(a)(8)(A)Describe the potential revenue reductions and expense increases associated with activated shortage response actions.x 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.x n/a 8.8 Section 8.8 10632(a)(8)(C)Retail Suppliers must describe the cost of compliance with Water Code ChapterDuring Drought.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.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.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.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.x n/a 9.1 Sections 9.1 10631(e)(1)Retail Suppliers shall provide a description of the nature and extent of each demand management measure implemented over the past five years. The description will address specific measures listed in code.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.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).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.x x 10.4 Section 10.4 10621(f)Each urban water Supplier shall update and submit its 2025 planx x 10.2Sections 10.2.2, 10.3, and 10.510642Provide 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.x x 10.2 Section 10.2.2 10642The Supplier is to provide the time and place of the hearing to any city or county within which the Supplier provides water.x x 10.3 Section 10.3.2 10642Provide supporting documentation that the UWMP and WSCP has been adopted as prepared or modified.x x 10.4 Section 10.4 10644(a)Provide supporting documentation that the Supplier has submitted their UWMP 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.x x 10.4Sections 10.4.1 and 10.4.210644(a)(2)The UWMP, or amendments to the UWMP, submitted to DWR shall be submitted electronically.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.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.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.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. 762
RESOLUTION NO. ________

A RESOLUTION OF THE CITY COUNCIL OF THE CITY OF ONTARIO,

CALIFORNIA, ADOPTING A WATER SHORTAGE CONTINGENCY PLAN
(WSCP).

WHEREAS, The California Urban Water Management Planning Act , (Wat. Code §10610, et seq. (the Act)), mandates that every urban supplier of water providing water for municipal purposes to more than 3,000 customers or supplying more than 3,000 acre feet of water annually, prepare and adopt, in accordance with prescribed requirements, a Water Shortage Contingency Plan (WSCP) as part of its Urban Water Management Plan (UWMP); and

WHEREAS, the Act specifies the requirements and procedures for adopting such WSCPs; and

WHEREAS, pursuant to recent amendments to the Act, urban water suppliers are required to adopt and electronically submit their WSCPs to the California Department of Water Resources (DWR) by July 1, 2026; and

WHEREAS, pursuant to the Act, “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; and

WHEREAS, the City of Ontario meets the definition of an urban water supplier for purposes of the Act and is required to prepare and adopt a WSCP as part of its 2025 UWMP; and

WHEREAS, the City of Ontario has prepared a WSCP in accordance with the Act, and in accordance with applicable legal requirements, has undertaken certain coordination, notice, public involvement, public comment, and other procedures in relation to its WSCP; and

WHEREAS, in accordance with the Act, the WSCP is prepared with the assistance of consulting professionals, and in cooperation with other governmental agencies, and has utilized and relied upon industry standards and the expertise of industry professionals in preparing its WSCP, and has also utilized DWR’s Urban Water Management Plan Guidebook 2025, including its related appendices, in preparing its WSCP; and

WHEREAS, in accordance with applicable law, including Water Code section 10642, and Government Code section 6066, a Notice of a P ublic Hearing regarding the City of Ontario ’s WSCP was published within the jurisdiction of City of Ontario on May 19, 2026 and May 26, 2026; and

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WHEREAS, in accordance with applicable law, including but not limited to Water Code section 10642, a public hearing was held on June 2, 2026 at 6:30 PM, or soon thereafter, in City of Ontario City Hall in order to provide members of the public and other interested entities with the opportunity to be heard in connection with proposed adoption of the WSCP and issues related thereto; and

WHEREAS, pursuant to said public hearing on the City of Ontario ’s WSCP, the City of Ontario, among other things, encouraged the active involvement of diverse social, cultural, and economic members of the community within the City of Ontario ’s service area with regard to the WSCP, and encouraged community input regarding the City of Ontario’s WSCP; and

WHEREAS, the City Council of the City of Ontario has reviewed and considered the purpo ses and requirements of the Act , the contents of the WSCP, and the documentation contained in the administrative record in support of the WSCP, and has determined that the factual analyses and conclusions set forth in the WSCP are legally sufficient; and

WHEREAS, the City Council of the City of Ontario desires to adopt the WSCP and to incorporate it as part of its 2025 UWMP prior to July 1, 2026 in order to comply with the Act.

NOW THEREFORE BE IT RESOLVED, the City Council of the City of Ontario hereby resolves as follows:

1. The Water Shortage Contingency Plan (WSCP) is hereby adopted as amended by changes incorporated by the City Council of the City of Ontario as a result of input received (if any) at the public hearing and ordered filed with the Secretary of the City Council of the City of Ontario and shall be incorporated into City of Ontario’s 2025 UWMP;

2. The Utilities General Manager is hereby authorized and directed to include a copy of this Resolution in the City of Ontario’s WSCP and/or in City of Ontario’s 2025 UWMP;

3. The Utilities General Manager is hereby authorized and directed, in accordance with Water Code sections 10621(d) and 10644(a)(1)-(2), to electron ically submit a copy of the WSCP, as part of its 2025 UWMP, to DWR no later than July 1, 2026;

4. The Utilities General Manager is hereby authorized and directed, in accordance with Water Code section 10644(a), to submit a copy of the WSCP, as part of its 2025 UWMP, to the California State Library, and to any city or county within which the City of Ontario provides water supplies no later than thirty (30) days after this adoption date;

5. The Utilities General Manager is hereby au thorized and directed, in accordance with Water Code section 10645, to make the WSCP available for public review at the City of Ontario’s offices during normal business hours and on its website at https://www.ontarioca.gov/government/municipal-utilities-company/water-quality no later than thirty (30) days after filing a copy of the WSCP, as part of its 2025 UWMP, with DWR; 764

6. The Utilities General Manager is hereby authorized and directed to implement the WSCP in accordance with the Act and to provide recommendations to the City Council of the City of Ontario regarding the necessary budgets, procedures, rules, regulations, or further actions to carry out the effective and equitable implementation of the WSCP.

7. The document and materials that constitute the record of proceedings on which this resolution and the above findings have been based are located at City Hall, 303 East “B” Street, Ontario, CA 91764. The custodian for these records is the City Clerk of the City of Ontario.

The City Clerk of the City of Ontario shall certify as to the adoption of this Resolution.

PASSED, APPROVED, AND ADOPTED this 2nd day of June 2026.

_____________________________________
PAUL S. LEON, MAYOR

ATTEST:

____________________________________

SHEILA MAUTZ, CITY CLERK

APPROVED AS TO FORM:

____________________________________

BEST BEST & KRIEGER LLP

CITY ATTORNEY

765

STATE OF CALIFORNIA )

COUNTY OF SAN BERNARDINO )

CITY OF ONTARIO )

AYES: COUNCIL MEMBERS:

NOES: COUNCIL MEMBERS:

ABSENT: COUNCIL MEMBERS:

____________________________________

SHEILA MAUTZ, CITY CLERK

(SEAL)

The foregoing is the original of Resolution No. 2026- duly passed and adopted by the Ontario City Council at their regular meeting held June 2, 2026.

_____________________________________

SHEILA MAUTZ, CITY CLERK

(SEAL)

766

EXHIBIT A WATER SHORTAGE CONTINGENCY PLAN
767
City of Ontario
2025 Urban Water Management Plan | 8-1
8Water Shortage Contingency Plan The Water Shortage Contingency Plan (WSCP) is a detailed plan for how City intends to act in the case of an actual water shortage condition. This allows for management of a shortage with predictability and accountability.

I N T HIS S E CTI ON Overview of WSCP ComponentsWater Supply Reliability AnalysisAnnual Water Supply andDemand AssessmentSix Standard Water ShortageLevelsShortage Response ActionsCommunication ProtocolsCompliance, Enforcement, andLegal AuthoritiesImplementation 768
City of Ontario 8. Water Shortage Contingency Plan
2025 Urban Water Management Plan | 8-2

8.1 Introduction The CWC Section 10632 requires that every urban water supplier shall prepare and adopt a standalone WSCP as part of its UWMP. The WSCP is a strategic plan that City of Ontario uses to prepare for and respond to foreseeable and unforeseeable water shortages. A water shortage occurs when the water supply available is insufficient to meet the normally expected customer water use at a given point in time. A shortage may occur due to a number of reasons, such as water supply quality changes, climate change, drought, regional power outage, and catastrophic events (e.g., earthquake). Additionally, the State may declare a statewide drought emergency and mandate that water suppliers reduce demands. The WSCP serves as the operating manual that City of Ontario will use to prevent catastrophic service disruptions through proactive, rather than reactive, mitigation of water shortages. The WSCP provides a process for an Annual Assessment and structured steps designed to respond to actual conditions. This level of detailed planning and preparation provides accountability and predictability and will help City of Ontario maintain reliable supplies and reduce the impacts of any supply shortages and/or interruptions. 8.2 Overview of WSCP Components The CWC establishes several prescriptive elements that must be included in a retail water Water Supply Reliability Analysis: reliability and identifies any key issues that may trigger a shortage condition. Annual Water Supply and Demand Assessment Procedures: Describes the key data inputs, and the steps to formally declare any water shortage levels and response actions. Shortage Stages: Establishes water shortage levels to clearly identify and prepare for shortages. Shortage Response Actions: Describes the response actions that may be implemented or considered for each stage to reduce gaps between supply and demand. Communication Protocols: Describes communication protocols under each stage to ensure customers, the public, and government agencies are informed of shortage conditions and requirements. Compliance and Enforcement: Defines compliance and enforcement actions available to administer demand reductions. Legal Authorities: Lists the legal documents that grant City of Ontario the authority to declare a water shortage and implement and enforce response actions. 769
City of Ontario 8. Water Shortage Contingency Plan
2025 Urban Water Management Plan | 8-3
Financial Consequences of WSCP Activation: Describes the anticipated financial impact of implementing water shortage stages and identifies mitigation strategies to offset financial burdens. Monitoring and Reporting: Summarizes the monitoring and reporting techniques to evaluate the effectiveness of shortage response actions and overall WSCP implementation. Results are used to determine if additional shortage response actions should be activated or if efforts are successful and response actions should be reduced. WSCP Refinement Procedures: Describes the factors that may trigger updates to the WSCP and outlines how to complete an update. Special Water Feature Distinctions: Identifies exemptions for decorative features aside from pools and spas. Plan Adoption, Submittal, and Availability: Describes the process for the WSCP adoption, submittal, and availability after each revision. document that can be modified as needed. The document is compliant with the CWC Section 10632 and incorporates guidance from the UWMP Guidebook 2025 (Guidebook) (Department of Water Resources, 2025). 8.3 Water Supply Reliability Analysis groundwater pumped from the Chino Basin; treated groundwater from the Chino Basin produced by the CDA; treated, imported water purchased from MWD through WFA; groundwater and/or surface water purchased from SAWCo; and recycled water purchased from IEUA. The City provides recycled water for irrigation instead of potable supplies. The Chino Basin is adjudicated, and groundwater supplies are managed. The reliability of the various sources of supply are discussed in Section 7 of the 2025 UWMP. Based on the adjudication provisions in the Chino Basin, the City can produce groundwater in excess of its rights, provided the City pays assessments to the Chino Basin Watermaster, which are used to purchase water to replenish the Chino Basin. Imported water supplies (both treated and untreated) may be impacted in the event MWD implements its Water Supply Allocation Plan (WSAP) due to a water supply shortage. Finally, recycled water is locally generated and generally is not impacted by drought conditions. Pursuant to CWC Section 10635, the City has conducted an analysis of its long-term water supply reliability which compares future water demands to best projections of supply availability under a range of hydrologic conditions. This analysis was most recently completed as a part of of the WSCP provides a concise summary of these assessments. The City recognizes that the WSCP is a stand-alone document that may be updated independently from the UWMP. In the 770
City of Ontario 8. Water Shortage Contingency Plan
2025 Urban Water Management Plan | 8-4
event of updates to the supply and demand projections outside of the UWMP planning cycle, this section of the WSCP may be updated to reflect revisions to the Water Service Reliability Assessment and the DRA. Section 7.2 over the next 25 years in five-year increments, including during normal years, single dry years, and a five consecutive year drought periods. It is anticipated that the City will have sufficient water supplies available to meet projected demands. 8.4 Annual Water Supply and Demand Assessment Procedures Since July 1, 2022, the City has been required to submit an Annual Assessment in accordance s unconstrained water demands (i.e. water demands prior to any projected response actions the City may trigger under this WSCP) for the current year and the upcoming (potential single dry) year. The City also assesses information regarding anticipated shortages, triggered shortage response actions, compliance and enforcement actions, and communication actions consistent For each Annual Assessment, the City plans to prepare a preliminary assessment which evaluates the adequacy of its water supplies for the current and upcoming years. The preliminary assessment will include a review of water supplies for at least a single dry year. The components of an Annual Assessment consist of the following: A decision-making process Key data inputs and assessment methodology 8.4.1 Decision Making Process The City produces groundwater from the Chino Basin as its primary source of water supply and that basin is managed on a FY basis. Consequently, during the third quarter of each FY the City will review its water demands from the initial six months along with the current groundwater basin conditions and local hydrology. This information will be used to help develop the Annual Assessment. A draft of the Annual Assessment will be circulated internally within the Utilities Water Resources Department for peer review and comment. Based on comments received, a redraft will be prepared and provided to the Water Resources Manager during the Spring of each year. If a new water shortage stage or new shortage response actions are required, a final draft of the Annual Assessment may be provided to the General Manager and City Council for review such that any recommended specific shortage response actions may be enacted. The final Annual Assessment will be provided to DWR no later than July 1 of each year. The Annual Assessments will be instrumental in providing guidance to the City for decisions regarding potential declarations of a water supply shortage and implementation of water reduction stages, instituting mandatory water restrictions, promoting WUE and conservation 771
City of Ontario 8. Water Shortage Contingency Plan
2025 Urban Water Management Plan | 8-5
programs, adopting and implementing water rates and drought rate surcharges, and pursuing alternative water supplies when necessary. This process will help ensure adequate water supply resources are available to the City. 8.4.2 Data and Methodologies The key data inputs and methodologies which will be evaluated by the City during the preparation of the preliminary assessment will include the following: 1. Evaluation Criteria: The locally applicable evaluation criteria used to prepare the Annual Assessment will be identified. The evaluation criteria may include, but is not limited to, an analysis of current local hydrology (including rainfall and groundwater levels), current water demands, a review of water system improvement plans which may impact infrastructure availability, and water quality regulations which may impact groundwater availability. 2. Water Supply: An assessment of each available water supply source will be conducted. The assessment may include a quantification of each available water supply source based on review of current production capacities, historical production, UWMPs, and prior water supply studies (including Water Supply Assessments and/or Master Plans). 3. Unconstrained Water Demand: The potential unconstrained water demands during the current year and the upcoming (potential single dry) year, prior to any special shortage response actions, will be reviewed. The review may include factors such as weather, existing and projected land uses and populations, actual customer consumption and water use factors, monthly demand and supply reports, existing water shortage levels (see Section 8.5), and existing water conservation ordinances (see Section 9 of UWMP). 4. Planned Water Use for Current Year Considering Dry Subsequent Year: The water supplies available and projected for use to meet the demands during the current year and the upcoming (potential single dry) year will be considered and identified by each type of supply. The evaluation may include factors such as estimated water demands, weather, groundwater basin operating safe yields, water quality results, existing available pumping capacities, imported water allocations, contractual obligations, regulatory issues, use of emergency interconnections, and the costs associated with producing each water supply source. 5. Infrastructure Considerations: The capabilities of the water system infrastructure to meet the water demands during the current year and the upcoming (potential single dry) year will be considered. Available production capacities (e.g. groundwater well capacities) and distribution system water losses will be reviewed. In addition, capital improvement and replacement projects, as well as potential projects which may increase water system and production capacities, will be considered. 6. Other Factors: Additional local considerations, if any, which can affect the availability of water supplies will be described. 772
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8.5 Six Standard Water Shortage Levels The City has a legal responsibility to provide water utility services, including water for residential, commercial, industrial, public authority, and for public fire hydrants and private fire services. The City will manage water supplies prudently to minimize the adverse impacts of water shortages. Tsevere or extended water shortage. This includes structured stages of action referred to as water supply shortage planning levels. Table 8-1 provides a description of the six standard levels sources, depending on the severity of the shortage and its anticipated duration. 773
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Table 8-1- Water Shortage Contingency Planning Levels Shortage Level Percent Shortage Range Shortage Response Actions (Narrative description) 1 Up to 10% Washing of motor vehicles, trailers, boats, or other types of mobile equipment shall be done only with a hand-held bucket or a hose equipped with a positive shutoff nozzle for quick rinses, except that washing may be done at the immediate premises of a commercial car wash or with reclaimed wastewater. No person shall sprinkle, water, or irrigate any landscaped or vegetated areas between the hours of 9:00 a.m. and 4:00 p.m. 2 Up to 20% In addition to Shortage Level 1, operators of hotels and motels must provide the option of choosing not to have towels and linens laundered daily. Irrigation is prohibited during and within 48 hours of rainfall. 3 Up to 30% In addition to Shortage Level 2, the use of fire hydrants shall be limited to fire fighting and related activities and other uses of water for municipal purposes shall be limited to activities necessary to maintain the public health, safety, and welfare. Unless written permission has been granted by the City Manager or his/her designee, the use of potable water for construction activities and grading shall be prohibited. 4 Up to 40% In addition to Shortage Level 3, residents and CII customers will be prohibited from irrigating turf or other landscaping more than two days a week. No person shall irrigate any turf or landscaped area more than fifteen minutes (15) on watering days. No vehicles shall be washed unless it is taken to a carwash. 5 Up to 50% In addition to Shortage Level 4, residents and CII customers will be prohibited from irrigating turf or other landscaping more than one day a week. 6 Greater than 50% In addition to Shortage Level 5, unless otherwise permitted by a resolution of the City Council, there shall be no use of potable water for irrigation of outdoor landscape or turf. Commercial nurseries shall be prohibited from the use of potable water for irrigation of outdoor, landscape and turf except by use of a hand-held hose equipped with a positive shutoff nozzle. The following nonessential use of water shall be prohibited: the filling, cycling, filtering, or refilling of swimming pools, spas, Jacuzzis, fountains, or other like devices. The 2025 UWMP requires urban water suppliers to have six standardized water shortage 774
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(City of Ontario, 2021) established a voluntary stage followed by four water supply shortage levels that would be mandatory once put into effect: Stage 1 addresses a water supply shortage of up to 10 percent; Stage 2 addresses a water supply shortage of up to 20 percent; Stage 3 addresses a water supply shortage of anywhere between 20 percent to 50 percent; and Stage 4 addresses a water supply shortage of more than 50 percent. During the 2020 UWMP cycle, the City prepared a Water Conservation Plan (City of Ontario, 2021) that addressed the six standard stages of action in accordance with DWR. Under this stage during normal water supply conditions as well as the existing Stage 1 and Stage 2 water supply shortage levels as is. However, the City amended Stage 3 to address a water supply shortage of up to 30 percent. In addition, the City included Stage 4 and Stage 5 that will be used to address a water supply shortage of up to 40 percenexisting Stage 4 was amended to a Stage 6 level which addresses a water supply shortage of more than 50 percent. For the 2025 UWMP, the City will continue to follow the Water Conservation Plan. In 2023, California chaptered into law the Non-Function Turf Irrigation Regulations (Assembly Bill 1572) requiring all public water systems to revise their ordinances to ban irrigation, with potable water, of non-functional turf located on commercial, industrial, and institutional properties. The City is working toward updating their Municipal Code (Title 6 Chapter 8A for Water Conservation Plan) to include the required language within General Prohibitions, not affecting the Conservation Stages. 8.6 Shortage Response Actions 8.6.1 Demand Reduction 8.6.1.1 Voluntary Conservation Stage All people are encouraged to voluntarily limit the amount of water used to the amount absolutely necessary for health and safety, business operations, and irrigation. Except as otherwise provided in this chapter where a declared water shortage stage or water shortage emergency requires mandatory or other more stringent requirements, the following elements of conservation apply at all times on a voluntary basis by all people within the City: 1) Avoid hose washing of sidewalks, walkways, driveways, parking areas, or other paved surfaces, except as required for sanitary purposes. If a person uses a hand-held hose to wash any paved surfaces, the hose shall be equipped with a positive shutoff nozzle. 2) Wash motor vehicles, trailers, boats, and other types of mobile equipment using a hand-held bucket, or a hose equipped with a positive shutoff nozzle for quick rinses, 775
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or at the immediate premises of a commercial car wash or with recycled wastewater for approved uses. 3) Avoid using water to clean, fill, or maintain levels in decorative fountains, ponds, lakes, or other similar aesthetic structures unless such water is part of a recycling system. 4) Encourage restaurants, hotels, cafes, cafeterias, or other public places where food is sold, served or offered for sale, to serve drinking water only to those customers expressly requesting water. 5) Promptly repair all leaks from indoor and outdoor plumbing fixtures. 6) Avoid watering lawn, landscape or other turf areas more often than every other day and during the hours between 6:00 a.m. and 6:00 p.m. 7) Avoid causing or allowing the water to run off landscape areas into adjoining streets, sidewalks, or other paved areas due to incorrectly directed or maintained sprinklers or excessive watering. 8.6.1.2 Stage 1 Water Supply Shortage (Up to 10%) During a Stage 1, the following mandatory restrictions on the use of potable water shall be water supplies are likely to be reduced by up to ten percent (10%) or it has otherwise been requested or directed by executive order or regulation of a State agency to reduce its potable water consumption or production by a specified amount. 1) Except as required for health and sanitary purposes, washing of sidewalks, driveways, parking areas or other paved surfaces is prohibited. Any hand-held hose used for such purposes shall be equipped with a positive shutoff nozzle. 2) Washing of motor vehicles, trailers, boats or other types of mobile equipment shall be done only with a hand-held bucket or a hose equipped with a positive shutoff nozzle for quick rinses, except that washing may be done at the immediate premises of a commercial car wash or with reclaimed wastewater. 3) No water shall be used to clean, fill or maintain levels in decorative fountains, ponds, lakes or other similar aesthetic structures unless such water is part of a recycling system. 4) No restaurant, hotel, café, cafeteria or other public place where food is sold, served or offered for sale, shall serve drinking water to any customer unless expressly requested. 5) All water customers of the City shall promptly repair all leaks from indoor and outdoor plumbing fixtures. Such leak shall be repaired in a timely manner after notification by the City, but in no case after notification in excess of 72 hours for the first violation and then every 72 hours thereafter for the second and third violations. 6) No person shall sprinkle, water, or irrigate any landscaped or vegetated areas between the hours of 9:00 a.m. and 4:00 p.m. In any event, such watering shall not 776
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be in excess of needs nor be of a manner that allows water flow onto streets or other paved areas. The above mentioned may be watered by a hand-held hose equipped with a positive shutoff nozzle at any time of the day. Commercial nurseries, golf courses, and other water-dependent industries are exempt. 7) No water customer of the City shall cause or allow the water to run off landscaped area into adjoining streets, sidewalks or other paved areas due to incorrectly directed or maintained sprinkler or excessive watering. 8) The use of water from fire hydrants shall be limited to fire fighting and related activities necessary to maintain the public health, safety, and welfare. An exception may be made for construction use through a proper City-Designated meter. The use of potable water for construction activities shall be restricted in areas where recycled water is available for such use. 8.6.1.3 Stage 2 Water Supply Shortage (Up to 20%) During a Stage 2, the following mandatory restrictions on the use of potable water shall be applicable when the City Council determines that it is likely that the City will suffer a reduction of more than ten percent (10%) up to twenty percent (20%) in its water supplies or it has otherwise been requested or directed by executive order or regulation of a State Agency to reduce its potable water consumption or production by a specified amount. 1) All the prohibitions and restrictions in Stage 1 shall be in effect provided that the more restrictive measures noted in this Stage shall take precedence. 2) Filling or refilling of empty swimming pools shall not occur without the written permission of the City Manager or his/her designee. 3) All customers are prohibited from irrigating turf or ornamental landscapes during and within 48 hours following measurable rainfall. 4) Operators of hotels and motels must provide guests with the option of choosing not to have towels and linens laundered daily and prominently display notice of this option. 5) All persons, including the City, are prohibited from irrigating with potable water any ornamental turf on public street medians. 6) The use of potable water irrigation outside of newly constructed homes and buildings shall be consistent with the California Building Standards Commission and the Department of Housing & Community Development. 8.6.1.4 Stage 3 Water Supply Shortage (Up to 30%) During a Stage 3, the following mandatory restrictions on the use of potable water shall be applicable when the City Council determines that it is likely that the City will suffer a reduction of more than twenty percent (20%) and up to thirty percent (30%) in its water supplies or it has otherwise been requested or directed by executive order or regulation of a State Agency to reduce its potable water consumption or production by a specified amount. 1) All the prohibitions and restrictions in the preceding Stages shall be in effect provided that the more restrictive measures noted in this Stage shall take precedence. 777
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2) Residents and CII customers will be prohibited from irrigating any turf or landscape area more than four (4) days a week. 3) The use of water from fire hydrants shall be limited to fire fighting and related activities and other uses of water for municipal purposes shall be limited to activities necessary to maintain the public health, safety, and welfare. Unless written permission has been granted by the City Manager or his/her designee, the use of potable water for construction activities and grading shall be prohibited. 8.6.1.5 Stage 4 Water Supply Shortage (Up to 40%) During a Stage 4, the following mandatory restrictions on the use of potable water shall be applicable when the City Council determines that it is likely that the City will suffer a reduction of more than thirty percent (30%) and up to forty percent (40%) in its water supplies or it has otherwise been requested or directed by executive order or regulation of a State Agency to reduce its potable water consumption or production by a specified amount. 1) All the prohibitions and restrictions in the preceding Stages shall be in effect provided that the more restrictive measures noted in this Stage shall take precedence. 2) Residents and CII customers will be prohibited from irrigating turf or other landscaping more than two (2) days a week. 3) No person shall irrigate any turf or landscaped area more than fifteen minutes (15) on watering days. 4) No vehicles shall be washed unless it is taken to a carwash. 8.6.1.6 Stage 5 Water Supply Shortage (Up to 50%) During a Stage 5, the following mandatory restrictions on the use of potable water shall be applicable when the City Council determines that it is likely that the City will suffer a reduction of more than forty percent (40%) and up to fifty percent (50%) in its water supplies or it has otherwise been requested or directed by executive order or regulation of a State Agency to reduce its potable water consumption or production by a specified amount. 1) All the prohibitions and restrictions in the preceding Stages shall be in effect provided that the more restrictive measures noted in this Stage shall take precedence. 2) Residents and CII customers will be prohibited from irrigating turf or other landscaping more than one (1) day a week. 8.6.1.7 Stage 6 Water Supply Shortage Emergency (More than 50%) During Stage 6, the following mandatory restrictions on the use of potable water shall be applicable when the City Council determines that it is likely that the City will suffer a reduction of more than fifty percent (50%) in its water supplies or it has otherwise been requested or directed by executive order or regulation of a State agency to reduce its potable water consumption or production by a specified amount. A water shortage emergency may be declared whenever the City Council finds and determines that the ordinary demands and requirements of water 778
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consumers cannot be satisfied without depleting the water supply of the City to the extent that there would be insufficient water for human consumption, sanitation, and fire protection. A water shortage emergency may include an immediate emergency. An immediate emergency may occur as a result of a breakage or failure of a dam, pump, pipe line or conduit, a major earthquake, large-the City's available water supply. The following restrictions on the use of potable water shall be applicable during a Stage 6 Water Supply Shortage Emergency: 1) All the prohibitions and restrictions in the preceding Stages shall be in effect provided that the more restrictive measures noted in this Stage shall take precedence. 2) Unless otherwise permitted by a resolution of the City Council, there shall be no use of potable water for irrigation of outdoor landscape or turf. 3) Commercial nurseries shall be prohibited from the use of potable water for irrigation of outdoor, landscape and turf except by use of a hand-held hose equipped with a positive shutoff nozzle. 4) The following nonessential use of water shall be prohibited: the filling, cycling, filtering, or refilling of swimming pools, spas, Jacuzzis, fountains or other like devices. Table 8-2- Demand Reduction Actions Shortage Level Demand Reduction Actions How much is this going to reduce the shortage gap? Additional Explanation or Reference Penalty, Charge, or Other Enforcement? 1 Other - Prohibit use of potable water for washing hard surfaces Collective reduction from all Shortage Level 1 actions is up to 4,712 AF Yes 1 Other - Require automatic shut of hoses Collective reduction from all Shortage Level 1 actions is up to 4,712 AF Yes 1 Water Features - Restrict water use for decorative water features, such as fountains Collective reduction from all Shortage Level 1 actions is up to 4,712 AF Yes 779
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Shortage Level Demand Reduction Actions How much is this going to reduce the shortage gap? Additional Explanation or Reference Penalty, Charge, or Other Enforcement? 1 CII - Restaurants may only serve water upon request Collective reduction from all Shortage Level 1 actions is up to 4,712 AF Yes 1 Other - Customers must repair leaks, breaks, and malfunctions in a timely manner Collective reduction from all Shortage Level 1 actions is up to 4,712 AF Yes 1 Landscape - Limit landscape irrigation to specific times Collective reduction from all Shortage Level 1 actions is up to 4,712 AF Yes 1 Landscape - Restrict or prohibit runoff from landscape irrigation Collective reduction from all Shortage Level 1 actions is up to 4,712 AF Yes 780
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Shortage Level Demand Reduction Actions How much is this going to reduce the shortage gap? Additional Explanation or Reference Penalty, Charge, or Other Enforcement? 1 Other Collective reduction from all Shortage Level 1 actions is up to 4,712 AF The use of water for fire hydrants shall be limited to fire fighting and related activities necessary to maintain the public health, safety, and welfare. An exception may be made for construction use through proper city-designated meter. The use of potable water for construction activities shall be restricted in areas where recycled water is available for such use. Yes 2 Other Collective reduction from all Shortage Level 2 actions is up to 9,424 AF Includes all Stage 1 actions Yes 2 Other water feature or swimming pool restriction Collective reduction from all Shortage Level 2 actions is up to 9,424 AF Filling or refilling of empty swimming pools shall not occur without the written permission of the City Manager or his/her designee. Yes 781
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Shortage Level Demand Reduction Actions How much is this going to reduce the shortage gap? Additional Explanation or Reference Penalty, Charge, or Other Enforcement? 2 Landscape - Other landscape restriction or prohibition Collective reduction from all Shortage Level 2 actions is up to 9,424 AF All customers are prohibited from irrigating turf or ornamental landscapes during and within 48 hours following measurable rainfall. Yes 2 CII - Lodging establishment must offer opt out of linen service Collective reduction from all Shortage Level 2 actions is up to 9,424 AF Yes 2 Landscape - Prohibit all landscape irrigation Collective reduction from all Shortage Level 2 actions is up to 9,424 AF All persons, including the City, are prohibited from irrigating with potable water any ornamental turf on public street medians. Yes 2 Landscape - Other landscape restriction or prohibition Collective reduction from all Shortage Level 2 actions is up to 9,424 AF The use of potable water for irrigation outside of newly constructed homes and buildings shall be consistent with California Building Standards Commission and Department of Housing & Community Development. Yes 782
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Shortage Level Demand Reduction Actions How much is this going to reduce the shortage gap? Additional Explanation or Reference Penalty, Charge, or Other Enforcement? 3 Other Collective reduction from all Shortage Level 3 actions is up to 14,137 AF includes all Stage 2 actions Yes 3 Landscape - Limit landscape irrigation to specific days Collective reduction from all Shortage Level 3 actions is up to 14,137 AF Residents and CII customers will be prohibited from irrigating any turf or landscape area more than four days a week. Yes 3 Other - Prohibit use of potable water for construction and dust control Collective reduction from all Shortage Level 3 actions is up to 14,137 AF The use of water from fire hydrants shall be limited to fire fighting and related activities and other uses of water for municipal purposes shall be limited to activities necessary to maintain the public health, safety and welfare. Unless written permission has been granted by the City Manager or his/her designee, the use of potable water for construction activities and grading shall be prohibited. Yes 783
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Shortage Level Demand Reduction Actions How much is this going to reduce the shortage gap? Additional Explanation or Reference Penalty, Charge, or Other Enforcement? 4 Other Collective reduction from all Shortage Level 4 actions is up to 18,849 AF Includes all Stage 3 actions Yes 4 Landscape - Limit landscape irrigation to specific days Collective reduction from all Shortage Level 4 actions is up to 18,849 AF Residents and CII customers will be prohibited from irrigating any turf or landscape area more than two days a week. Yes 4 Landscape - Other landscape restriction or prohibition Collective reduction from all Shortage Level 4 actions is up to 18,849 AF No person shall irrigate any turf or landscaped area more than fifteen minutes (15) on watering days. Yes 4 Other - Prohibit vehicle washing except at facilities using recycled or recirculating water Collective reduction from all Shortage Level 4 actions is up to 18,849 AF Yes 5 Other Collective reduction from all Shortage Level 5 actions is up to 23,561 AF Includes all Stage 4 actions Yes 5 Landscape - Limit landscape irrigation to specific days Collective reduction from all Shortage Level 5 actions is up to 23,561 AF Residents and CII customers will be prohibited from irrigating any turf or landscape area more than one day a week. Yes 784
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Shortage Level Demand Reduction Actions How much is this going to reduce the shortage gap? Additional Explanation or Reference Penalty, Charge, or Other Enforcement? 6 Other Collective reduction from all Shortage Level 6 actions is greater than 23,561 AF Includes all Stage 5 actions Yes 6 Landscape - Prohibit all landscape irrigation Collective reduction from all Shortage Level 6 actions is greater than 23,561 AF Commercial nurseries shall be prohibited from the use of potable water for irrigation of outdoor, landscape and turf except by use of a hand-held hose equipped with a positive shutoff nozzle. Yes 6 Landscape - Other landscape restriction or prohibition Collective reduction from all Shortage Level 6 actions is greater than 23,561 AF Yes 6 Other water feature or swimming pool restriction Collective reduction from all Shortage Level 6 actions is greater than 23,561 AF The following nonessential uses of water shall be prohibited: the filling, cycling, filtering, or refilling swimming pools, spas, Jacuzzis, fountains or other like devices. Yes 8.6.2 Supply Augmentation The City does not plan to add a new source of water supply to address customer demands, but instead will consider increased supplies from existing sources. Instead, the City will focus on demand reduction measures in the event existing sources of supply are not sufficient to meet customer demands. As discussed in UWMP Section 785
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include: groundwater pumped from the Chino Basin; treated groundwater from the Chino Basin produced by the CDA; treated, imported surface water purchased from MWD through WFA; groundwater and/or surface water purchased from San Antonio Water Company; and recycled water purchased from IEUAfrom the Chino Basin. As noted in Section 8.4, since July 1, 2022, the City prepares and submit an Annual Assessment which will include a review of water supplies available to meet water demands for the current and upcoming years. In the event the City is currently in, or considers entering into, one of the standard water shortage levels identified in Section 8.5, the City will consider the water supply augmentation actions described below. For each water shortage level discussed in Section 8.5, the City will consider supplementing its existing water supplies through increased groundwater production instead of the purchase of additional imported water supplies, to the extent possible. source of water supply is strictly imported surface not anticipate augmenting water supplies. IEUA is limited in its ability to implement water supply augmentation actiTable 8-3actions that are relevant to IEUA. To the extent possible, IEUA would coordinate with MWD and its other member agencies on supply augmentation projects during normal and shortage periods to continue expanding water reliability for the entire region. Table 8-3- Supply Augmentation and Other Actions (DWR Table 8-3) SHORTAGE LEVEL SUPPLY AUGMENTATION METHODS AND OTHER ACTIONS BY WATER SUPPLIER HOW MUCH IS THIS GOING TO REDUCE THE SHORTAGE GAP? ADDITIONAL EXPLANATION OR REFERENCE 1-6 MWD Supply Augmentation 0 to 100% of shortage gap Coordinate with MWD and, if needed, purchase supplemental supplies from MWD Due to previous critically dry conditions, MWD developed the WSAP whereby available supplies are equitably allocated to its member agencies, including CDA, IEUA, and WFA. The WSAP establishes ten different shortage levels and a corresponding drought allocation to each member agency. Based on the shortage level established by MWD, the WSAP provides a reduced drought allocation to a member agency for its Municipal and Industrial (M&I) retail demand. The ratio of MWD water supply drought allocation to local water supply will change based on the WSAP stage. 786
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and Colorado River) and demand is to make optimal use of its supply augmentation options, consisting of drawing from flexible supply programs and storage reserves. MWD has developed and actively manages a portfolio of water supply programs including water transfer, storage, and exchange agreements. MWD pursues voluntary water transfer and exchange programs to help mitigate supply/demand imbalances and provide additional dry-year supply sources. In addition, MWD has developed significant storage capacity in reservoirs, conjunctive use, and in 2019, approximately 750,000 AF of total stored water is emergency storage reserved by MWD for use in the event of supply interruptions. -going water supply and storage programs and management practices, the City will use up to the treated imported water supply made available from MWD through WFA in association with each of the standard water shortage levels identified in Section 8.5. Water demands will be addressed through increased use of the local groundwater supplies and implementation of demand reduction measures through the various stages of action. The City will consider augmenting its existing water supplies through production of additional groundwater from the Chino Basin. As noted in Section 6, the Chino Basin is managed under the Chino Basin adjudication. During the period of management under the Chino Basin Judgment, significant drought events have occurred. In each drought cycle the Chino Basin has been managed to maintain water levels. Parties to the Chino Basin Judgment, including the City, are authorized to produce groundwater in excess of their rights and pay assessments for such production to the Chino Basin Watermaster. The assessments are used to purchase untreated imported water to replenish the Chino Basin. The Chino Basin Watermaster purchases untreated imported water to replenish the Chino Basin from MWD through IEUA. Groundwater quality is carefully monitored by the Chino Basin Watermaster. Treatment facilities and/or blend plans have been developed by water agencies to meet potable water standards and to prevent the spread of any groundwater contamination. Groundwater quality in the Chino Basin is not expected to impact potable supplies or constrain supply reliability. Based on historical and on-going management practices, the City will be able to continue relying on the Chino Basin for adequate supplies in response to each of the standard water shortage levels identified in Section 8.5. 8.6.3 Operational Changes During a water supply shortage situation, the City will manage its water supply resources to provide sufficient water supplies capable of meeting the demands of its customers. Section 8.6.1 measures. Section 8.6.2 augmentation actions available. The supply augmentation actions and demand reduction measures, when implemented, may potentially result in short-term operational changes which are necessary to allow the City to utilize all available water supply sources in response to water shortage situations. 787
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As noted in Section 8.4, the City prepares and submit an Annual Assessment which will include a review of the water supplies available to meet water demands for the current and upcoming years. Preparation of the Annual Assessment will assist the City in determining any potential operational changeMMs (discussed in Section 9), will be essential to the City in reducing water demands during any water shortage period. The operational changes the City will consider in addressing non-catastrophic water shortages on a short-term basis include the following: Improved monitoring, analysis, and tracking of customer water usage to enforce demand reduction measures Optimized production from existing available water supply sources Potential use of emergency supply sources, including emergency interconnections Potential blending of water supply resources Improved monitoring, maintenance, and repairs to reduce water distribution system losses 8.6.4 Additional Mandatory Restrictions The mandatory restrictions which are implemented by the City to reduce customer demands are discussed in Section 8.6.1. There are no additional mandatory restrictions planned at this time. 8.6.5 Emergency Response Plan (identified in 8.5) and the associated demand reduction measures (described in Section 8.6.1). In addition to the water supply augmentation actions (Section 8.6.2) and potential operational changes (Section 8.6.3) which the City may consider in order to continue providing sufficient water supplies, the City will review and implement any necessary steps included in its (ERP). population greater than 3,300 people, including the City, are required to review and update their very five (5) years. However, due to security concerns regarding the submitting of these reports, water systems are required to submit certifications to the United States Environment Protection Agency (USEPA), from March 31, 2025 and December 30, 2026, confirming the current RRA and ERP have been reviewed and updated. rch 2025, evaluates the vulnerabilities, threats, and (which is incorporated by reference) by evaluating the following items: Natural hazards and malevolent acts (i.e., all hazards); 788
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Resilience of water facility infrastructure (including pipes, physical barriers, water sources and collection, treatment, storage and distribution facilities, and electronic, computer and other automated systems); Monitoring practices; Financial systems (e.g., billing systems); Chemical storage and handling; and Operation and maintenance. consequences to both the water system and surrounding region, and the likelihood of -effectiveness of implementing potential countermeasures to reduce risks was also reviewed. March 2025, provides the management, procedures, and designated actions the City and its employees will implement during emergency situations (including catastrophic water shortages) resulting from natural disasters, system failures and other unforeseen circumsthe guidelines for evaluating an emergency situation, procedures for activating an emergency response, and details of the different response phases in order to ensure that customers receive a reliable and adequate supply of potable water. The scope of the ERP includes emergencies which directly affect the water system and the ability to maintain safe operations (such as a chlorine release, and earthquake or a threat of contamination). The ERP also incorporates the Strategies and resources to improve resilience, including physical and cybersecurity Plans and procedures for responding to a natural hazard or malevolent act Actions and equipment to lessen the impact of a natural hazard or malevolent act Strategies to detect natural hazards or malevolent act The City will review the ERP for procedures regarding the utilization of alternative water supply sources in response to water supply shortages, including during the standard water shortage levels. The City will also review applicable procedures described in the ERP regarding any necessary temporary shutdown of water supply facilities, including appropriate regulatory and public notifications. 8.6.6 Seismic Risk Assessment and Mitigation Plan Emergency Management Agency (FEMA) in 2023. The Hazard Mitigation Plan identifies effective ways to assess the significant natural hazards (including earthquakes) that may affect the City and its residents. The Hazard Mitigation Plan provides resources, information, and coordination of mitigation activities throughout the City. The Hazard Mitigation Plan includes facilities (including its distribution system pipelines, groundwater wells, booster pumps, and 789
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Mitigation Plan is provided in Appendix G.-was approved by the FEMA in 2023 (San Bernardino County, 2023)-Jurisdictional Hazard Mitigation Plan identified methods to assess significant natural hazards (including earthquakes) affecting areas throughout San Bernardino County, and the mitigation strategies necessary to reduce risks, including seismic risk. The Countlocated in Appendix H.The California Geological Survey has published the locations of numerous faults which have been mapped in the Southern California region. Although the San Andreas fault is the most recognized and is capable of producing an earthquake with a magnitude greater than 8 on the Richter scale, some of the lesser-known faults have the potential to cause significant damage. provided in the Figure 8-1 below. The faults that are located in close proximity to and could fault, the Walnut Creek fault, the San Jose fault, the Red Hill fault, the Cucamonga fault, the Chino fault, the Rialto-Colton fault and the Central Avenue fault. As discussed in Section 6, the faults which border the Chino Basin include the Rialto-Colton fault, the Chino fault, the San Jose fault, and the Cucamonga fault.Figure 8-1- Location of Earthquake Faults Source: (California Geological Survey, 2026)The following Figure 8-2 provides the relative intensity of ground shaking in the vicinity of the -period Ontario
790
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-period shaking affects tall, relatively flexible buildings, but also correlates with earthquake damage. The shaking potential is calculated based on the level of ground motion that has a 2 percent chance of being exceeded in 50 years (or the level of ground-shaking with an approximate 2,500-year average repeat time). As discussed in Section 8.6.5, the City has prepared an ERPwhich provides the management, procedures, and designated actions the City and its employees will implement during emergency situations resulting from natural disasters, including during earthquakes, to ensure that customers receive a reliable and adequate supply Figure 8-2- Earthquake Shaking Potential Source: (California Geological Survey and USGS, 2016)8.6.7 Shortage Response Action EffectivenessThe effectiveness of the shortage response actions for each of the standard water shortage levels identified in Section 8.5water demands in response to a water supply shortage. In addition, the City imposes water consumption regulations and restrictions, and supports local agencies in efforts to enforce regulresponse actions, in order to reduce any potential gaps between supply and demand, has been quantified in the expected demand reduction provided in Table 8-2.

Ontario
791
City of Ontario 8. Water Shortage Contingency Plan
2025 Urban Water Management Plan | 8-25
supply source. During the past 15 years, the City experienced a five-year consecutive drought within its service area from FY 2011-12 to FY 2015-16. Throughout this extended dry year average of approximately 41,558 AF. In addition, historical records indicate the City previously produced a maximum of up to 45,196 AF during FY 2013-14. The City has been able to provide sufficient water supplies to its customers, including during long-term droughts and years with historically high water demands. In addition, the City has been able to provide water service to meet maximum day water demands for these years, including during the summer months. -21 to FY 2024-25) averaged approximately 31,743 AFY. Due to conservation efforts and DMMs (discussed in Section including during long-dry, and multiple dry years) are provided in Section 7 and are anticipated to incorporate similar reductions in water use rates as a result of the shortage response actions, ongoing conservation efforts, and DMMsuse rates, it is anticipated the City will be able to continue providing sufficient water supplies to its customers to meet projected water demands, including during long-term droughts. In addition, based on historical and on-going management practices, the City will be able to continue relying on its water supply source from the Chino Basin for adequate supply augmentation in response to each of the standard water shortage levels identified in Section 8.5. shortages, the adopted water shortage levels, the adjusted operating safe yields, and water supplies during long-term droughts, it is anticipated that the City will be able to provide sufficient water supplies to its customers during each of its standard water shortage levels. Although adequate supplies are anticipated, the cost of those water supplies may become incrementally more expensive. The City will enact varying stages of its WSCP to encourage retail customers to reduce water consumption and at the same time reduce the need to use the more expensive actions, in order to reduce any potential gaps between supply and demand, has been quantified in the expected demand reduction section provided in Table 8-22015 Executive Order B-29-15 which mandated statewide reduction in water use of 25 percent. 2, 3, 4, 5, and 6 are expected to reduce water demands by up to 10%, 20%, 30%, 40%, 50%, and greater than 50%, respectively. 792
City of Ontario 8. Water Shortage Contingency Plan
2025 Urban Water Management Plan | 8-26

8.7 Communication Protocols Upon finding that a need to implement a Stage 1 through Stage 6 Water Supply Shortage exists, the City Council will order implementation of the appropriate water shortage response action, or other measures which it deems appropriate to address the water shortage. This order shall be made by Resolution and will be published in a daily newspaper of general circulation and will become effective immediately following publication. The appropriate regulations that fall under the Stage Level declared will take effect with the first full billing period commencing on or after the effective date of the City Council's Resolution. In the event of an immediate emergency that causes an unplanned interruption of water supply, the City Manager or his/her designee is authorized to restrict water use and apportion the available supply of water among its customers in the most equitable manner possible to continue service fairly and without discrimination, except that preference shall be given to such service as is essential to the public interest and to the preservation of life and health. 8.8 Compliance and Enforcement to comply with the prohibitions and restrictions of each water supply shortage stage. All fines and penalties may apply to each of the prohibitions and restrictions of each water supply shortage stage. If a customer is found to be in violation of any water supply shortage stage provision, fines begin with a written notice and subsequent violations include fines of $100, $200, and $500. 8.9 Legal Authorities The City has the legal authority to implement and enforce its WSCP. California Constitution article X, section 2 and CWC section 100 provide that water must be put to beneficial use, the waste or unreasonable use or unreasonable method of use of water shall be prevented, and the conservation of water is to be exercised with a view to the reasonable and beneficial use thereof in the interest of the people and the public welfare. In addition, CWC Section 375 provides the City with the statutory authority to adopt and enforce water conservation restrictions, and CWC Section 350 et seq. authorizes the City to declare a water shortage emergency and impose water conservation measures when it determines that the City may not be able to satisfy ordinary demands without depleting supplies to an insufficient level. If necessary, the City shall declare a water shortage emergency in according with CWC Chapter 3 (commencing with Section 350) of Division 1. Once having declared a water shortage, the City is provided with broad powers to implement and enforce regulations and restrictions for managing a water shortage. No. 3027, a water shortage, including a water shortage emergency but excluding an immediate emergency, shall be declared by the adoption of a resolution of the City Council, in accordance 793
City of Ontario 8. Water Shortage Contingency Plan
2025 Urban Water Management Plan | 8-27
with CWC section 350. The City Council may declare a water shortage based on a determination by the MWD and the IEUA of a water shortage, the declaration of an executive order of the Governor or the adoption of voluntary or mandatory water use restrictions by any State Agency governing the use of water or based upon any interruption in water supply or delivery that the City Council determines in its sole discretion necessitates water conservation pursuant to this chapter. Under California law, including CWC Chapters 3.3 and 3.5 of Division 1, Parts 2.55 and 2.6 of Division 6, Division 13, and Article X, Section 2 of the California Constitution, the City is authorized to implement the water shortage actions outlined in this Ordinance No. 3027. In water shortage cases, shortage response actions to be implemented will be at the discretion of the City and will be based on an assessment of the supply shortage, customer response, and need for demand reductioOrdinance No. 3027. It is noted 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 state will defer to implementation of locally adopted WSCPs to the extent practicable. The City will coordinate with the County and any other entities as necessary for possible proclamation of a local emergency as necessary under California Government Code, California Emergency Services Act (Article 2, Section 8558). In the event of an immediate emergency that causes an unplanned interruption of water supply, the City Manager or his/her designee is authorized to restrict water use and apportion the available supply of water among its customers in the most equitable manner possible to continue service fairly and without discrimination, except that preference will be given to such service as is essential to the public interest and to the preservation of life and health. At any time during Stage 1, 2, 3, 4, 5, or 6, if the City Council determines that additional reductions in the amount the potable water being used by water customers are necessary, it may adopt a resolution establishing water use limitations and enforce those water use limitations by the adoption and imposition of a volumetric penalty established therein. 8.10 Financial Consequences of WSCP Potential revenue reductions and expense increases associated with activated shortage During periods of water supply shortages, state-mandated water use restrictions, or emergency conditions, the City may require its customers to reduce demands below levels projected under the current water rate structure. Under any of these circumstances, the City may experience a decrease in revenues. In order to offset any decline in revenues, the City Council may adopt costs to provide water to its customers. 794
City of Ontario 8. Water Shortage Contingency Plan
2025 Urban Water Management Plan | 8-28
Projected demands, water supply reductions, water rates and cost of water cannot be known with certainty. However, even under a hypothetical scenario whereby sales are gradually reduced by up to 50 percent, certain actions are known as noted below: Water supplies: CDA supplies will not be impacted from a quantity or cost standpoint. As demands/sales are reduced, the City will rely on its least expensive sources of supply first and sequentially reduce the most expensive sources of water supply (i.e. imported water). This action will address much of the gap between reduced revenue from water sales and the cost of the water supplies. As sales are reduced, distribution system losses will also be reduced on a proportional basis resulting in savings by not having to provide as much water. Revenue from water sales: Revenue from the monthly standby charge to each retail customer will remain constant regardless of the volume of water sold. The City will regularly track the impacts of potentially reduced water sales on revenue and severely affected by a water shortage, the following measures could be taken by the City to alleviate the financial impacts before there has been a significant draw on financial reserves: Rate Adjustment Decrease in Capital Expenditure Decrease in O&M Expenditure Rate increases are not viewed positively by the customers particularly when they reduce consumption. Negative consequences that could arise from the cost-cutting actions include dissatisfaction of the customers, reduced funding for Capital Improvement Projects and system maintenance, and reduced staff availability for emergency response. Nonetheless, these tools are available to the City in a worst-case scenario to ensure a constant balance between revenue and expenses. 8.11 Monitoring and Reporting The City regularly monitors water supply and consumption throughout the service area, including annual Distribution System Water Audits to monitor real and apparent losses, ensuring customer compliance with the provisions in the WSCP. During water supply shortages, City staff accounting system. Losses are monitored by comparing water production to sales. City staff regularly monitor the system and repairs leaks in a timely manner. Rates of consumption will be consumption during non-shortage periods. In the event system-wide monitoring indicates water use reduction targets are not met, City staff may perform a more detailed review and comparison against normal water use rates for specific water use categories. Outcomes of the 795
City of Ontario 8. Water Shortage Contingency Plan
2025 Urban Water Management Plan | 8-29
categorical review may include additional targeted outreach/communication to categories that have not achieved the appropriate reduction and/or identification of specific meters/users for additional records review. 8.12 WSCP Refinement Procedures Section 8.11, the City will monitor and report on the implementation of the WSCP. The City will review the implementation results for any current or potential shortage gaps between water supplies and demands. The City will evaluate the need for revising the WSCP in order to resolve any shortage gaps, as necessary. The City will consider the following potential revisions in the event of a potential shortage gap: Implementation of additional public outreach, education, and communication programs(in addition to the programs discussed in Section 9).Implementation of more stringent water use restrictions under the standard watershortage levels (discussed in Section 8.5).Implementation of stricter enforcement actions and penalties (discussed in Section 8.8).Improvements to the water supply augmentation responses (discussed in Section 8.6.2),as well as any associated operational changes (discussed in Section 8.6.3) which maybe required.Incorporation of additional actions recommended by City staff or other interested parties.The City will use the monitoring and reporting data to evaluate the ability for these potential revisions to resolve any shortage gaps which may occur within the standard water shortage levels. UWMP adoption process discussed in Section 10. It is anticipated the City will review, revise, and adopt an updated WSCP as part ofpreparing its 2025 UWMP as necessary. However, the City will continue to review themonitoring and reporting data, and if needed, update the WSCP more frequently. Any updatesSection 8.14).8.13 Special Water Feature Distinction supplied with water, including ponds, lakes, waterfalls, and fountains, but excluding pools and spas. In general, there are additional health and safety considerations in the water supplied to reviewed the response actions, enforcement actions, and monitoring and reporting programs separately for decorative water features and for pools and spas, as applicable. As described in Section 8.6.1, under a Stage 1 Water Supply Shortage Level, no water shall be used to clean, fill or maintain levels in decorative fountains, ponds, lakes or other similar aesthetic structures unless such water is part of a recycling system. 796
City of Ontario 8. Water Shortage Contingency Plan
2025 Urban Water Management Plan | 8-30

8.14 Plan Adoption, Submittal, and Availability UWMP adoption process discussed in Section The City will conduct a public hearing and make the WSCP available for publicinspection.The City will provide notification of the time and place of the public hearing to any city orcounty in which water is provided.The City will publish notice of public hearing in a newspaper once a week, for twosuccessive weeks (with at least five days between publication dates).The City Council will adopt the 2025 UWMP and the WSCP.As part of submitting the 2025 UWMP to DWR, the City will also submit the WSCPJuly 1, 2026. The City will submit a copy of the WSCP to the California State Library andto any city or county in which water is provided within 30 days of adoption. In addition,the City will make the WSCP available for public review within 30 days of adoption.If there are any subsequent amendments required, the process for adopting an amended WSCP includes the following: The City will conduct a public hearing and make the amended WSCP available for publicinspection via public City Council agendas.The City Council will adopt the amended WSCP.submittal tool) within 30 days of adoption.(and 2025 UWMP) is provided in Section 10. 797
Department: Economic Development
Prepared By: Charity Hernandez
Department:

Prepared By: Charity Hernandez
Staff Member Presenting: Jennifer McLain
Hiramoto, Economic Development Director
Approved By:

Submitted To: Council/OHA
Approved: _______________________________
Continued To: ___________________________
Denied: __________________________________
Item No: 30
SUBJECT:

A PURCHASE AND SALE AGREEMENT BY AND BETWEEN THE CITY OF ONTARIO

AND SAN BERNARDINO COUNTY

CITY OF ONTARIO
Agenda Report
June
2, 2026
SECTION:

ADMINISTRATIVE

REPORTS/DISCUSSION/ACTION

RECOMMENDATION:

That City Council approve a Purchase and Sale Agreement ("Agreement") (On File with Records Management) for the property consisting of approximately 73.19 acres, located at the southwest corner of Bon View Avenue and Eucalyptus Avenue ("Site"), and authorize the City Manager or his designee, to ﬁnalize and implement non-substantive revisions to the Purchase Agreement, and execute and implement any and all contracts, agreements, and other documents required to effectuate the Agreement.

THE FOLLOWING COUNCIL GOALS ARE BEING ACHIEVED:

Invest in the Growth and Evolution of the City's Economy Operate in a Businesslike Manner
FISCAL IMPACT:

The total purchase price of the property is $95,000,000. If approved, additional appropriations
will be included in the Capital Projects fund at a future quarterly budget update to City Council for approval as needed.

BACKGROUND & ANALYSIS:

The City of Ontario ("the City") has been actively working to expand park and open space opportunities across the City, especially in Ontario Ranch. A key component of this eﬀort is the development of “Grand Park,” a planned 340-acre passive park that will ultimately provide residents with accessible open space, trails, and recreational opportunities. The County owns certain real property within the City that was acquired pursuant to Wildlife, Coastal and Park Land Conversation Bond Act (Proposition 70), which, in pertinent part, restricts the use of property to public park, recreational, or open spaces purposes.

As a way to further enhance and expedite this initiative, the City has partnered with the County of San Bernardino ("County") to facilitate the transfer and development of land for park purposes. The County currently owns the Site. The County originally acquired the Site using Proposition 70 funds.

Recognizing the opportunity to advance park development in South Ontario, the City and County 798
have worked collaboratively to establish a framework that allows the Proposition 70 restrictions to be transferred. On November 18, 2025, the City Council approved the Public Park Proceeds Agreement and the Parks Incentive Reimbursement Agreement, which together provide the implementation structure to support the acquisition and future development of parkland in the Grand Park.

The proposed Purchase and Sale Agreement represents the next step in this collaboration with the County, allowing the City to acquire the 73.19-acre Site from the County. Although the Site is currently encumbered by Proposition 70 restrictions, these restrictions are removed but operation of law at the closing of escrow and later preserved and transferred to other replacement land in accordance with State requirements. Speciﬁcally, the use of the replacement land must continue to be limited to public park, recreational, or open-space purposes, consistent with the California Public Resources Code.

To facilitate this process, the San Bernardino County Board of Supervisors adopted an updated
land plan ("Plan") on April 7, 2026, a Plan that
was approved by California State Parks Oﬃce of
Grants and Local Services (OGALS) on March 3, 2026. This Plan, among other actions, authorizes the sale of the Site to the City and provides a mechanism for the Proposition 70 restrictions to be transferred to replacement parkland, identiﬁed as the Grand Park.

Grand Park is envisioned as a
340-acre passive park that will serve residents of both the City and surrounding communities. The City has already acquired approximately 120 acres toward this vision and began initial construction earlier this year.

Through the agreements approved by the City Council on November 18, 2025, the City has also established a funding mechanism to support the County’s participation in this eﬀort, encouraging the sale of additional properties, like the Site, that can be used for park and recreational purposes.

The proposed Purchase and Sale Agreement is the ﬁrst transaction under this broader partnership and demonstrates the shared commitment of the City and County to invest in open space, environmental stewardship, and quality of life for residents.

The project will require compliance with City’s acquisition review and compliance process. The Agreement provides that among other things, the completion of due diligence, including title review, CEQA compliance, and SLA compliance (for County) is a condition to close of escrow.

Staff recommends approval of the Agreement.
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Ontario City CouncilJune 2, 2026

Ontario City Council
June 2, 2026