Ontario Water Bill Payment, Customer Service Phone Number and Office Hours
Use official City of Ontario resources to pay your water, sewer and integrated waste utility bill, start service, ask about payment plans, contact Utilities Customer Service, report water leaks, handle sewer spill emergencies, check water quality resources and reach the correct after-hours water contact.
If you are searching for Ontario Water Department CA, the official provider is the Ontario Municipal Utilities Company. Billing and payment collection for water, sewer and integrated waste is handled through Utilities Customer Service. Choose your need below to reach the correct official payment, account, billing, leak or emergency route.
Choose one option. The card below will show the best official action, phone number and practical warning.
💳 Pay online — use official City of Ontario Pay Water Bill portal
Use this for: paying or managing your City of Ontario utility bill online.
Keep ready: customer number, account number, service address and payment method.
After payment: save confirmation and contact Customer Service if the account is past due or under payment-plan review.
Ontario Water Department Quick Facts Before You Pay
Ontario Municipal Utilities Company provides the City’s water supply and wastewater collection services. The OMUC office is listed at 1425 S. Bon View Avenue, Ontario, CA 91761, with phone 909-395-2600.
Utilities Customer Service handles starting services, billing and payment collection for water, sewer and integrated waste. The Utilities Customer Service Center is listed at 1333 S. Bon View Avenue, Ontario, CA 91761, and the customer service phone is 909-395-2050.
What This Ontario Water Department Guide Covers
How to Pay City of Ontario Water Bill Online
The official City header and OMUC pages link customers to Pay Water Bill. The customer portal includes a Pay Now route that asks for the customer and account numbers from your utility bill.
Open the official payment portal
Start from the official City of Ontario Pay Water Bill portal.
Use Pay Now or account login
If you want a faster payment route, use Pay Now. If you manage the account often, create or log into your customer account.
Enter customer and account numbers
Use the exact customer number and account number printed on your Ontario utility bill.
Review the account before paying
Confirm the name, service address, amount due and payment method before submitting.
Save confirmation
Save the confirmation number, amount, date and time. If your account is past due, call Utilities Customer Service at 909-395-2050.
Ontario Water Bill Phone Number, Address and Hours
For billing and account inquiries, call Utilities Customer Service at 909-395-2050. The service center for billing and payments is listed at 1333 S. Bon View Avenue, Ontario, CA 91761.
The Ontario Municipal Utilities Company office is listed at 1425 S. Bon View Avenue, Ontario, CA 91761, with phone 909-395-2600. OMUC hours are listed as Monday through Thursday from 7:30 AM to 5:30 PM, and Friday from 7:30 AM to 4:30 PM.
909-395-2050
Utilities Customer Service.
1333 S. Bon View Avenue
Ontario, CA 91761
1425 S. Bon View Avenue
Ontario, CA 91761
909-395-2600
Mon–Thu: 7:30 AM–5:30 PM
Friday: 7:30 AM–4:30 PM
Keep Your Bill Ready
Have your customer number, account number, service address and payment confirmation ready before calling.
Faster supportLeak or Sewer Spill?
Use the OMUC leak or after-hours emergency contacts instead of the payment portal.
Correct routingCity of Ontario Utility Bill Payment and Account Options
Ontario’s official portal gives customers a bill-payment route and account-management options. The City’s Customer Service page also explains that payment plan options may be available for past due balances.
| Need | Official route | Best for | Practical warning |
|---|---|---|---|
| Online water bill pay | Pay Water Bill portal | Paying or managing the utility account online. | Use customer and account numbers from bill. |
| Pay Now | customer.ontarioca.gov Pay Now | Quick payment without full account navigation. | Confirm service address before paying. |
| Billing questions | 909-395-2050 | Account, payment, bill and service questions. | Call before interruption risk becomes urgent. |
| Payment plan | Utilities Customer Service | Past due balance help. | New bills remain separate from payment plan. |
| Start service | In person or by phone | New water/sewer/integrated waste account setup. | Required documents must be received first. |
| Leak or sewer issue | 909-395-2678 | Leaks, sewer/drain covers and water quality questions. | After hours use 909-986-6711. |
Start Ontario Water, Sewer and Integrated Waste Service
The City’s Customer Service page says Utilities Customer Service is responsible for setting up new services and billing/payment collection for water, sewer and integrated waste services.
You can start service in person at the Utilities Customer Service Center at 1333 S. Bon View Avenue or by phone at 909-395-2050. Required documents must be received before services can start, and documents may be sent to CustomerService@ontarioca.gov.
Before starting service
- Prepare government-issued ID.
- Prepare Social Security Number when required.
- Provide proof of ownership if newly purchased within 60 days.
- Tenants may need landlord authorization.
- Pay the required advance payment.
- Send required documents before the requested start date.
Ontario Utility Bill Payment Plan and Senior/Disabled Discount
Ontario says customers having difficulty paying a utility bill should reach out for help. The City offers payment plan options for customers with past due balances through the customer service line at 909-395-2050.
The City also lists a Disabled Person’s and Senior Citizen’s Discount program. Qualified households can receive a monthly discount of up to $15 off the combined water, sewer and refuse utility bill.
Before asking for payment help
- Call Customer Service before service interruption risk increases.
- Have your customer and account number ready.
- Ask whether your balance qualifies for a payment plan.
- Remember payment plans cover past due balances, not future bills.
- Ask which documents are required for the senior or disabled discount.
- Submit discount application/supporting documents in the required way.
Ontario Water Leak, Sewer Spill and After-Hours Water Help
For water leaks, open/leaking fire hydrants, missing sewer/drain covers and water quality questions, the City directory lists 909-395-2678.
For a sewer spill, the City says to report it immediately. Call Ontario Municipal Utilities at 909-395-2678 during regular OMUC hours. After hours, call Ontario PD Dispatch at 909-986-6711.
What to report for a leak or sewer issue
- Exact address or nearest cross street.
- Whether the issue is water leak, hydrant leak, missing sewer cover, sewer spill or drain issue.
- Whether water or sewage is entering a street, home, business, yard or storm drain.
- Whether the issue is on private property or public right-of-way.
- Your name and callback number.
- Any traffic, public safety or health risk.
High Ontario Water Bill, Leak Check and Usage Review
If your Ontario utility bill suddenly increases, check for leaks and usage changes before assuming a billing error. Common causes include running toilets, irrigation leaks, outdoor hose use, underground leaks, pool filling, water softener problems or a past due balance.
Because the utility bill can include water, sewer and integrated waste, review every line item. If the balance still looks wrong, call Utilities Customer Service at 909-395-2050 with your bill and account number ready.
Before calling about a high bill
- Compare current usage with previous bills.
- Check toilets for silent running.
- Check irrigation, hose bibs and outdoor watering.
- Look near the meter, yard, foundation and walls for wet areas.
- Review sewer and integrated waste charges separately.
- Keep repair receipts and photos if you find a leak.
Ontario Water Rates, Fees and Water Quality Resources
The City Customer Service page links to 2025 Water and Wastewater Rates and Integrated Waste Rate Sheet resources. Because rates and fees can change, always use the official current documents rather than old screenshots or third-party summaries.
The City also maintains Water Quality resources. The Water Quality page explains the City’s lead service line inventory work and states the City is committed to safe and reliable drinking water while following federal and state standards.
Useful official checks
- Review current water and wastewater rate sheet.
- Check integrated waste rate sheet if the total bill changed.
- Use the Water Quality page for official drinking water information.
- Review lead service line inventory information if relevant to your property.
- Call Customer Service for account-specific billing questions.
- Call OMUC for water quality questions.
Official Ontario Water Department Links and Billing Resources
Use these official resources first. They help avoid wrong payment processors, outdated phone numbers, unofficial bill-payment pages and delayed emergency reporting.
💳 Pay Water Bill
Official City of Ontario customer portal for utility bill payment and account access.
Open Pay Water Bill⚡ Pay Now
Official portal route to quickly pay using customer and account numbers from the bill.
Open Pay Now☎️ Customer Service
Official page for starting service, billing, payment plans and discount program details.
Open Customer Service💧 Municipal Utilities
Official OMUC page for water, wastewater, service hours and department resources.
Open OMUC🚨 Contact OMUC
Official directory for leaks, sewer spills, water quality questions and after-hours water needs.
Open Contact Page📌 Water Quality
Official City page for drinking water quality and lead service line inventory information.
Open Water QualityOntario Utilities Customer Service Center Map and Directions
The Utilities Customer Service Center for billing and payment help is listed at 1333 S. Bon View Avenue, Ontario, CA 91761. OMUC is separately listed at 1425 S. Bon View Avenue.
Utilities Customer Service Center
Use this map for 1333 S. Bon View Avenue, Ontario, CA 91761.
Ontario Water Phone, Address, Hours and Payment Details
Use this quick table when you need to pay, call, start service, ask for payment help, report a leak or contact the correct after-hours route.
| Need | Official detail | Best action |
|---|---|---|
| Online water bill pay | Pay Water Bill | Use for official online utility bill payment. |
| Quick payment | Pay Now | Use customer and account numbers from the bill. |
| Billing / account inquiries | 909-395-2050 | Use for customer service, billing and payment-plan questions. |
| Service center | 1333 S. Bon View Avenue, Ontario, CA 91761 | Use for billing, payment and start-service documents. |
| Municipal Utilities | 1425 S. Bon View Avenue, Ontario, CA 91761 | Use for OMUC department reference. |
| Water leak / sewer spill | 909-395-2678 | Use for water leaks, sewer spills and water quality questions. |
| After-hours water need | 909-986-6711 | Use Ontario PD Dispatch after hours for water-related needs. |
| City Hall main | 909-395-2000 | Use for general City routing, not bill-specific help. |
FAQs About Ontario Water Department Bill Pay
How do I pay my City of Ontario water bill online?
Use the official City of Ontario Pay Water Bill portal at customer.ontarioca.gov. You can also use the Pay Now route with the customer and account numbers from your utility bill.
What is the Ontario water bill customer service phone number?
For billing, account and payment inquiries, call Utilities Customer Service at 909-395-2050.
Where is Ontario Utilities Customer Service located?
The Utilities Customer Service Center is listed at 1333 S. Bon View Avenue, Ontario, CA 91761.
What is the Ontario Municipal Utilities Company phone number?
The Ontario Municipal Utilities Company phone number is 909-395-2600.
What are Ontario Municipal Utilities office hours?
OMUC hours are listed as Monday through Thursday, 7:30 AM to 5:30 PM, and Friday, 7:30 AM to 4:30 PM.
Who do I call for an Ontario water leak or sewer spill?
Call Ontario Municipal Utilities at 909-395-2678. After hours, call Ontario PD Dispatch at 909-986-6711.
Can Ontario utility customers get a payment plan?
Yes. The City says payment plan options are available for customers with past due balances by contacting Utilities Customer Service at 909-395-2050.
Does Ontario offer a senior or disabled utility bill discount?
Yes. The City lists a Disabled Person’s and Senior Citizen’s Discount program with a monthly discount of up to $15 off the combined water, sewer and refuse utility bill for qualified households.
How do I start water service in Ontario CA?
You can start service in person at the Utilities Customer Service Center or by phone at 909-395-2050. Required documents must be received before services can start.
Is this page the official City of Ontario website?
No. This is an independent informational guide. Use the official OntarioCA.gov and customer.ontarioca.gov links in this article for payments, account help, leak reporting and emergencies.
Best Way to Pay Ontario Water Department Bill in 2026
The best official route is to start from the City of Ontario Pay Water Bill portal or the Pay Now page. Keep your customer number and account number ready before paying.
For billing help, payment plans, account setup and service questions, call 909-395-2050. For leaks, sewer spills and water quality questions, call 909-395-2678. For after-hours water needs, call 909-986-6711.
Important Notice: This article is an independent informational guide and is not the City of Ontario, Ontario Municipal Utilities Company, a payment processor, emergency dispatcher or official utility service. Payment links, phone numbers, office hours, rates, fees, discounts, start-service requirements, payment-plan rules, leak reporting contacts and utility policies can change. Always verify urgent or official matters directly with the City of Ontario before acting.
Pay Your Water Bill Safely, Fix High Bills, Avoid Shutoff, Start Service and Find Official Utility Links
Use this free USA water bill assistant before paying online, calling utility billing, setting up AutoPay, checking a high bill, requesting leak help, starting or stopping service, handling a past due account, or searching for the official city utility portal.
What water bill problem do you need to solve?
Choose your situation. The tool will suggest the safest route, what to prepare, and which official page or office to check first.
Open the official city, county, water authority or utility website first. Do not enter account details into a random sponsored payment page.
If the bill is unusually high, compare usage, billing days, meter read type, toilet leaks, irrigation, late fees and leak adjustment rules before paying blindly.
Safe Water Bill Payment Route
Choose how you want to pay. This helps users avoid wrong portals, posting delays and urgent shutoff mistakes.
AutoPay / Bank Draft Setup Helper
Use this before enrolling in recurring payments so the first draft, current balance and payment date do not surprise you.
High Water Bill Review
Compare your normal bill and usage with the current bill. This gives a practical path before requesting a high bill review.
Leak Adjustment Proof Checklist
Use this before asking for a leak adjustment, high bill review, sewer adjustment or payment plan.
Past Due, Shutoff Notice and Reconnect Helper
Use this if your bill is late, you received a shutoff notice, service is off, or you need a payment plan.
Start, Stop or Transfer Water Service
Use this before moving, closing an account, starting service, transferring service or requesting a final bill.
Water Bill Cost Estimate
Estimate a simple monthly bill from base charge, water usage, sewer, stormwater, trash, service fees and late charges. Official tiered rates may be different.
Bill Dispute and Meter Reading Checklist
Use this before calling billing support about a meter reading, duplicate payment, wrong address, missing payment, estimated bill, or incorrect charge.
Official Water Bill Portal and Phone Finder
Enter city/utility and state to create safe searches for official water bill pay, phone payment, guest pay, AutoPay, start service, leak adjustment, reconnect, assistance and this site’s guide.
Official portal safety
- Use official city, county, authority or utility websites first.
- Check service address before paying.
- Save confirmation number and screenshot.
- Call the utility for shutoff or reconnect situations.
Best sitewide placement
Place this tool after the first payment section or before FAQs. It turns every water bill article into a practical help page, not only a list of links.
Important note
This tool gives educational guidance only. Always confirm payment portals, fees, shutoff rules, assistance programs, account balance and reconnection steps with the official utility.