The City of Napa Water Division, under the City Utilities Department, provides water for about 88,068 residents living in the Napa area, California. Established in 1872, the Napa Water Division collects surface water from three sources. Depending on which water treatment plant is in operation, the source comes from: (1) Barker Slough in the Sacramento Delta via the North Bay Aqueduct (treated by the Edward I. Barwick Jamieson Canyon Water Treatment Plant), (2) Lake Hennessey (treated by the Hennessey Water Treatment Plant), or (3) Lake Milliken (treated by the Milliken Water Treatment Plant).

Napa Drinking Water Quality

Consumer Confidence Water Quality Reports

Under the authority of the Safe Drinking Water Act, the EPA requires Napa Water Division 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 City Of Napa Water? 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, City Of Napa Water 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 Napa Water Division Customer Service

Have a Question, Issue or Comment?

Main Customer Service

Physical Address:
P.O. Box 660
Napa County, California 94559

707-257-9521
"No email provided. Please visit the contact form." (https://www.cityofnapa.org/Directory.aspx?did=54)

Emergency (24 hours - broken water main or pipeline, etc.)
707-253-4451

Pay Your City Of Napa Water Bill

Already have an account?

If you already have an account, you just need to login to the City Of Napa Water site. City Of Napa Water 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 City Of Napa Water 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 Napa County Water Service

Starting Your Service

When you move to a new home in Napa, you'll most likely already have running water, but you'll still need to set up water service with the City Of Napa Water. Luckily, Napa County 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 Napa, you'll need to stop your water service with the City Of Napa Water, 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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