The Ontario Municipal Utilities provides water for about 167,382 residents living in the Ontario area. Established in 1891, the Ontario Municipal Utilities water supplies are comprised of surface water and groundwater. Surface water originates from the State Water Project (supplied by Metropolitan Water District) and is treated by Water Facilities Authority (WFA). Groundwater supplies are drawn from city-owned wells (local groundwater), San Antonio Water Company (SAWCO), and Chino Desalter Authority (CDA) wells.

Ontario City Drinking Water Quality

Consumer Confidence Water Quality Reports

Under the authority of the Safe Drinking Water Act, the EPA requires Ontario Municipal Utilities Company to assess local water quality each year and distribute a Consumer Confidence Water Quality Report. At WaterZen, we review these reports and make the information available, in a concise, straightforward, and easy-to-understand way.

Excellent

WaterZen Rating

Lead and copper levels in the drinking water of some cities across the United States are too high, potentially creating public-health issues for the people living in those areas.

What about Ontario Municipal Utilities? How much lead and copper are in your drinking water? And how do those levels compare to other cities in the state? We examined data from hundreds of cities across the nation to understand and grade your water quality.

As you can see, Ontario Municipal Utilities received the best-possible grade because the amounts of contaminants found in the water supply were better than the Public Health Goal and most other water providers we've analyzed.

Excellent

WaterZen Rating

Lead and copper levels in the drinking water of some cities across the United States are too high, potentially creating public-health issues for the people living in those areas.

Contact Ontario Municipal Utilities Company Customer Service

Have a Question, Issue or Comment?

Main Customer Service

Physical Address:
1425 South Bon View Ave
Ontario, California 91761

909-395-2678
publicworksadmin@ci.ontario.ca.us

Emergency (24 hours - broken water main or pipeline, etc.)
909-986-6711

Pay Your Ontario Municipal Utilities Bill

Already have an account?

If you already have an account, you just need to login to the Ontario Municipal Utilities site. Ontario Municipal Utilities accepts credit cards, debit, and direct deposit. Click here to login.

Want to create a new account?

You can create a new account on the Ontario Municipal Utilities website. Once you create the account, you can setup payment with credit, debit, or direct deposit. Click here to create an account.

Want to pay without an account?

You can make a one-time payment without creating an account. You will need to have your credit or debit card in order to make the one time payment. Click here to make a one time payment.

How to Start Ontario Water Service

Starting Your Service

When you move to a new home in Ontario City, you'll most likely already have running water, but you'll still need to set up water service with the Ontario Municipal Utilities. Luckily, Ontario has made it pretty simple with the following online form. Starting service generally takes just two business days.

Click here to fill out a Start Service Form.

Stopping Your Service

When you move out of a home in Ontario City, you'll need to stop your water service with the Ontario Municipal Utilities, so you don't keep getting billed. Simply fill out the following online form. Stopping service normally takes just two business days.

Click here to fill out a Stop Service Form.

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