California note
Most Ontario utility accounts start at one city counter
Ontario Utilities Customer Service opens and bills water, sewer, and integrated-waste accounts for most addresses. Two small areas use a different water district.
Ontario Utility Customer Service puts water, sewer, and city waste on one bill for most homes. Check the water provider first. Two small parts of north and east Ontario use Cucamonga Valley Water District instead of the city.
An owner who starts city service needs a government ID, Social Security number, and payment up front. If the home was bought in the past 60 days, bring proof of the sale. A renter needs an ID, Social Security number, and the same payment. The owner must also send a landlord form and ID. Recent proof of the sale may be needed. The city page does not list the payment amount.
Start service by phone at 909-395-2050 or in person. You may email the papers, but the city must approve the account before service starts. A business, trust, or company needs more records.
An existing customer can use the account site to plan a move or add service. The public page does not promise a stop form that works without signing in. Use the account site or call. Power, gas, phone, and internet are not part of this city bill.
Where to see it
Ontario Municipal Utilities Company and Utilities Customer Service pages.
Official sources
Official pages
Reviewed July 28, 2026
Current rules, forms, fees, deadlines, maps, and office instructions.
Rules, forms, fees, deadlines, and office procedures can change. Check the current page before you file, pay, or rely on a date.
Connected places
Open the local directory
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