Ontario CA Water Bill Help for Payments, Login, Past-Due Balances and New Service
This guide is for Ontario, California utility customers who need to pay a bill, find the correct portal, start water/sewer/trash service, avoid interruption, report a leak, or understand what belongs on the utility bill.
Each section gives the exact task, official link, phone number, address, and mistake to avoid, so users can act quickly without reading long paragraphs or guessing which city page matters.
Fast answer: To pay an Ontario CA water bill, use the official City of Ontario Link payment portal and enter the 8-digit Customer Number and 8-digit Account Number from your utility bill. For billing help, payment plans, new service, senior/disabled discount, or account questions, call 909-395-2050 or use the Utilities Customer Service Center at 1333 S. Bon View Avenue, Ontario, CA 91761.
Past-due warning: Ontario offers payment plans for past-due balances, but new bills issued after the plan starts must still be paid separately. Call before service interruption risk grows.
Ontario Water Bill Quick Facts
Ontario Water Bill Action Board: Click the Right Official Link
Use this board first. It gives the task, the official link, and the one thing users usually miss.
I need to pay my bill now
Use the official Ontario Link payment page. Enter the customer number and account number from your bill.
Open pay portalI am past due
Call 909-395-2050 and ask about a payment plan for the past-due balance before service interruption risk increases.
Payment plan infoI need to start service
Start water, sewer and integrated waste by phone or in person. Documents must be received before service starts.
Start service stepsI see a leak or sewer spill
Call 909-395-2678 during utility hours. After hours, contact Ontario PD Dispatch at 909-986-6711.
Leak contactsI need senior/disabled discount help
Eligible households may receive up to $15 monthly off combined water, sewer and refuse utility billing.
Discount detailsI need rate or fee details
Ontario implemented approved new water, sewer and solid waste rates after rate studies and public hearing process.
Rates pageHow to Pay an Ontario CA Water Bill Online
Open Ontario Link
Go directly to the city’s official bill payment page. Avoid sponsored utility payment ads.
Pay my billEnter Customer Number
The portal says the customer number is located on your utility bill and is 8 digits. Include leading zeros.
Enter customer numberEnter Account Number
The account number is also 8 digits. Include leading zeros exactly as shown on the bill.
Enter account numberSelect Credit Card or eCheck
The portal lists Credit Card and eCheck payment method options. Save the confirmation after paying.
Select payment methodOntario Link Login and Quick Pay Details
Many failed payments happen because the numbers are typed from memory. Use the bill exactly.
| Portal item | Official requirement | Practical user tip | Official link |
|---|---|---|---|
| Customer Number | 8 digits from the utility bill. | Include leading zeros. Do not shorten the number. | Pay portal |
| Account Number | 8 digits from the utility bill. | Use the current bill, especially after moving or changing service. | Enter account |
| Register Now | Used for online account access beyond quick pay. | Register if you want saved access, not just one-time payment. | Register / login |
| Forgot Username / Password | Available on the login page. | Use recovery instead of creating duplicate accounts. | Account recovery |
Ontario Utility Bill Past Due? Ask for a Payment Plan Before Service Risk
Call the correct number
Payment plan enrollment is handled through the customer service line at 909-395-2050.
Payment plan detailsPlan covers past due only
Ontario says payment plans are designed for past-due balances and do not include new bills issued after the plan starts.
Read city assistance noteKeep paying new bills
You are responsible for separate payments for each new bill during the payment plan period.
Make a current paymentPast-due call script
Water Shutoff Protection: What Ontario Customers Should Check
Ontario links to its SB 998 discontinuation policy for residential water service nonpayment. Use that policy page if the account is close to interruption or someone in the home has a hardship or medical concern.
Open the SB 998 page
The city provides discontinuation policy documents in English, Spanish, Chinese, Korean, Tagalog and Vietnamese.
View SB 998 policyCall before the deadline
Ask if a payment plan, dispute review, or required notice applies to your account.
Call 909-395-2050Keep proof
Save payment receipts, plan terms, staff names, dates, screenshots and confirmation numbers.
Pay / verify onlineDo not ignore trash or sewer lines
Ontario utility billing includes water, sewer and integrated waste services. Ask what balance must be paid to keep service safe.
Customer ServiceStart Ontario Water, Sewer and Integrated Waste Service
Choose phone or in-person start
You can start service by phone at 909-395-2050 or in person at the Utilities Customer Service Center.
Start service pagePrepare required documents
Government ID, Social Security Number, advance payment, and ownership/landlord documents may be required depending on owner or tenant status.
Email documentsSend documents before start
The city says required documents must be received before services start. Email is listed as CustomerService@ontarioca.gov.
Send to Customer ServiceAsk about same-day needs
The portal FAQ says requests should be made at least one working day before the start date, and same-day turn-on may require an upfront additional fee.
Service FAQOwner vs Tenant Requirements for Ontario Utility Service
| Who is starting service? | Official requirements | Common delay | Action link |
|---|---|---|---|
| Property owner | Government-issued ID, Social Security Number, proof of ownership if newly purchased within 60 days, and advance payment. | New owner forgets proof of ownership. | Owner steps |
| Owner authorizing tenant | Landlord Authorization Form, government-issued ID, proof of ownership if newly purchased within 60 days, and tenant steps below. | Tenant tries to start service before landlord authorization is completed. | Authorization info |
| Tenant | Government-issued ID, Social Security Number, advance payment, and owner-completed Landlord Authorization Form. | Missing landlord form or incomplete ID/account details. | Tenant steps |
| Business / trust / corporation | The city says additional documentation will be required if property is under a business, corporation, trust or similar name. | Bringing only personal ID for a business-held property. | Call 909-395-2050 |
Senior Citizen and Disabled Person Utility Discount
Discount amount
Qualified households can receive a monthly discount of up to $15 off the combined water, sewer and refuse utility bill.
Discount program detailsHow to submit
The city says to submit the completed application with required supporting documentation in person.
Application linksWhere to submit
Utilities Customer Service Center: 1333 S. Bon View Avenue, Ontario, CA 91761.
See mapReport Water Leaks, Sewer Spills, Water Quality Problems and After-Hours Issues
Water leaks
Water leaks, open/leaking fire hydrants, and missing sewer/drain covers: 909-395-2678.
Leak directorySewer spill
Report sewer spills immediately. Call OMUC at 909-395-2678 during listed hours.
Call OMUCAfter hours
For after-hours water needs, contact Ontario PD Dispatch at 909-986-6711.
Call after-hours dispatchLeak report script
Trash, Damaged Cans and Integrated Waste on the Ontario Utility Bill
Ontario Utilities Customer Service handles billing and collection for water, sewer and Integrated Waste services. This means a “water bill” question may actually be about trash, damaged carts, missed pickup or refuse charges.
Missed trash / damaged cans
Contact customer service, billing and account inquiries at 909-395-2050.
Contact directoryHousehold hazardous waste
The contact directory lists Household Hazardous Waste Facility at 909-395-2040.
Call HHW facilitySB 1383 cost context
Ontario says solid waste rate changes also address costs related to SB 1383 organic waste requirements.
Rates explanationOntario Utility Rates: Why Water, Sewer and Solid Waste Charges Changed
New rates approved
Ontario says new rates and charges were implemented on November 1, 2025 after cost-of-service studies.
OMUC rates pageWater cost drivers
Water rates cover operations such as water supply purchases, electricity, treatment, and capital infrastructure projects.
Water rates contextSewer cost drivers
Sewer rates cover operational needs such as repairs, maintenance, and capital improvements.
Sewer rates contextOntario Utilities Customer Service Map and Visit Plan
Use this location for billing, payments, start-service help, senior/disabled discount applications, and utility account questions.
Bring for billing help
Utility bill, customer number, account number, photo ID, payment proof, and any shutoff or past-due notice.
Bring for new service
Government ID, Social Security Number, advance payment, ownership or landlord authorization documents when required.
Ask before leaving
“Is my account current now, is a payment plan active, and do I still owe anything outside the plan?”
Official Ontario Utility Links
Ontario Water Bill FAQ
How do I pay my Ontario CA water bill online?
Use the official Ontario Link payment portal. Enter the 8-digit Customer Number and 8-digit Account Number from your utility bill, including leading zeros, then choose Credit Card or eCheck.
What phone number handles Ontario utility billing questions?
For customer service, billing and account inquiries, call 909-395-2050.
Where is the Ontario Utilities Customer Service Center?
The Utilities Customer Service Center is at 1333 S. Bon View Avenue, Ontario, CA 91761.
Can Ontario customers get a payment plan for a past-due utility bill?
Yes. Ontario offers payment plan options for past-due balances. Call 909-395-2050 to ask about enrollment. New bills issued after the plan starts must still be paid separately.
What documents are needed to start Ontario water service?
Requirements depend on owner or tenant status. Common requirements include government-issued ID, Social Security Number, advance payment, proof of ownership for recent purchases, and landlord authorization for tenants.
Can tenants start Ontario utility service?
Yes, but the property owner must complete the Landlord Authorization Form. Tenants also need government-issued ID, Social Security Number, and advance payment.
Does Ontario offer a senior or disabled utility discount?
Yes. Qualified households may receive up to $15 per month off the combined water, sewer and refuse utility bill. Applications and required documentation must be submitted in person at 1333 S. Bon View Avenue.
Who do I call for a water leak in Ontario?
For water leaks, open/leaking hydrants, missing sewer or drain covers, and water quality questions, call 909-395-2678 during listed OMUC hours.
Who do I call after hours for water-related needs in Ontario?
After hours, contact Ontario PD Dispatch at 909-986-6711 for water-related needs.
Why did my Ontario utility bill increase?
Check usage, past-due balances, payment plan status, sewer charges, integrated waste charges, late amounts, and rate changes. Ontario says new water, sewer and solid waste rates were implemented after cost-of-service studies and public hearing review.