California Water Service

The California Water Service (Cal Water) provides water for about 101,004 residents living in the Bayshore District, San Carlos area. Established in 1931, the California Water Service collects surface water sources purchased from the San Francisco Public Utilities Commission (SFPUC), which originates from spring snowmelt flowing down the Tuolumne River to storage in Hetch Hetchy Reservoir.

API Uploaded Image
Image

San Jose Drinking Water Quality

Consumer Confidence Water Quality Reports

Under the authority of the Safe Drinking Water Act, the EPA requires California Water Service 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.

Copper & Lead Report (2019)

B+

WaterZen Rating

Even in 2020, 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 California Water Service - San Mateo? 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, California Water Service - San Mateo received an above-average grade because the amounts of lead and copper found in the water supply were lower than most other water providers we've analyzed.

Copper & Lead Report (2019)

B+

WaterZen Rating

Even in 2020, 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 California Water Service - San Mateo? 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, California Water Service - San Mateo received an above-average grade because the amounts of lead and copper found in the water supply were lower than most other water providers we've analyzed.

Contact California Water Service Customer Service

Have a Question, Issue or Comment?

Main Customer Service

Physical Address:
1720 North First Street
San Jose, 95112

866-734-0743 (Mon–Fri, 7:00 AM–5:30 PM)
"No email provided. Please visit the contact form." (https://www.calwater.com/customercare/phone-numbers/)

Emergency (24 hours - broken water main or pipeline, etc.)
866-734-0743

Pay Your California Water Service - San Mateo Bill

Already have an account?

If you already have an account, you just need to login to the California Water Service - San Mateo site. California Water Service - San Mateo 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 California Water Service - San Mateo 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 San Jose City Water Service

Starting Your Service

When you move to a new home in San Jose, you'll most likely already have running water, but you'll still need to set up water service with the California Water Service - San Mateo. Luckily, San Jose City 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 San Jose, you'll need to stop your water service with the California Water Service - San Mateo, 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.

Latest Updates
utah-water-quality.jpg

Utah's Water Quality Scores a B+

Utah earned a B+ in water quality from WaterZen. How does Utah's grade compare to neighboring states?

grading-method.jpg

WaterZen Grading Methodology

WaterZen.com has assigned a letter grade for the water quality of nearly 1,500 water providers across the US. Here's our methodology.

Safe Drinking Water Act

The Safe Water Drinking Act of 1974 and Water Safety Standards in the United States

Learn all about the water regulations and reasons behind the Safe Drinking Water Act of 1974 passed by Congress to ensure that Americans have clean drinking water.

Interesting Water Facts

Seven Fascinating Facts About Water

How much do you know about water? Here are seven fascinating facts about H20.

5-Gallon Water Dispensers

Nine Factors to Consider When Buying a Five-Gallon Water Dispenser

Five-gallon home dispensers are a perfect option for home water storage. Here’s what you should know before buying any 5-gallon water dispenser or cooler.

Buying a Whole-House Humidifier

Six Key Things to Consider When Purchasing a Whole-House Humidifier

Buying a whole-house humidifier can be a daunting task if you're a first-time buyer. Here are six key things to consider when buying a humidifier.

Tankless Water Heater Installation

Seven Important Things to Consider about Electric Tankless Water Heater Installation

An electric tankless water heater installation needs expert guidance. Here are some important tips to remember before, during, and after the installation.

Fluoride in Water

Fluoride in Water: The Benefits and Risks of Fluoridation in Water

Fluoridation of public water contributes to dental and bone health for most Americans. Find out more about the pros and cons of fluoride in this article.

Collapsible Water Bottles

Five Things to Know About Collapsible Water Bottles

Are you planning to buy a collapsible water bottle? Here are five things you may not have known about these unique, flexible bottles.

Consequences of Iron in Water

What Are the Harmful Consequences of Iron in Water?

If the water in your home has a metallic taste or a brownish color, it might have a high amount of iron in it. Learn about the negative impacts of iron in water.

More Water Providers in California