Cal-Water Service Co.-Chico
The California Water Service (Cal Water) - Chico District, provides water for about 105,660 residents living in the Chico area and Hamilton City. Established in 1926, the Cal Water's Chico District extracts groundwater from the unadjudicated aquifers of the Sacramento River Valley via 63 active municipal wells. Cal Water Chico's system has a total of 65 wells located throughout the Chico-Hamilton City service area.
Chico Drinking Water Quality
Consumer Confidence Water Quality Reports
Under the authority of the Safe Drinking Water Act, the EPA requires Cal-Water Service Co.-Chico to assess local water quality each year and distribute a Consumer Confidence Water Quality Report.
The information in this report includes the source of your water, whether your water meets EPA standards, detailed tables of detected contaminants, detailed descriptions of those contaminants, possible reasons why they're present, and potential health effects (if any).
Read the Consumer Confidence Report for Chico main water system here:
Contact Cal-Water Service Co.-Chico Customer Service
Have a Question, Issue or Comment?
Main Customer Service
530-893-6300 (Mon–Fri, 8:00 AM–5:00 PM)
(email not available)
Emergency (24 hours - broken water main or pipeline, etc.)
Pay Your Cal-Water Service Chico Bill
Already have an account?
If you already have an account, you just need to login to the Cal-Water Service Chico site. Cal-Water Service Chico 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 Cal-Water Service Chico 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 Water Service
Starting Your Service
When you move to a new home in Chico, you'll most likely already have running water, but you'll still need to set up water service with the Cal-Water Service Chico. Luckily, has made it pretty simple with the following online form. Starting service generally takes just two business days.
Stopping Your Service
When you move out of a home in Chico, you'll need to stop your water service with the Cal-Water Service Chico, so you don't keep getting billed. Simply fill out the following online form. Stopping service normally takes just two business days.