How to Pay Your California Water Bill Online and by Mail

Where to pay your California Water bill

California Water Service Company (Cal Water) lets you pay your bill through their website, by phone, by mail, or in person at a payment center. The fastest route is their online portal at calwater.com, where you can pay when ready with a bank account or debit card. You can also set up automatic payments so the bill comes out on the same day each month.

If you do not have internet access or prefer to speak with someone, you can call Cal Water's customer service line. The phone number appears on your bill. Payment by phone takes a few minutes and works the same way as online — you provide your account number and bank details, and the payment processes right away.

Mailing a check or money order takes longer. Cal Water's mailing address is on your bill; allow at least 10 business days for the payment to reach them and post to your account. If you are close to your due date, mail is risky because late fees start the day after the due date, even if your check is still in transit.

Key Takeaways

• You can pay online at calwater.com, by phone using the number on your bill, by mail, or at a local payment center — each method has different processing times.
• Online and phone payments process the same day, while mailed checks take 10 business days or more to post.
• Setting up automatic payments prevents late fees by removing the need to remember your due date each month.
• Late fees begin the day after your due date, so mail is only safe if you have at least two weeks before the important date.
• Your account number and service address appear on your bill and are required for any payment method.

Paying online through the Cal Water website

Go to calwater.com and look for the "Pay My Bill" or "Bill Pay" link, usually near the top of the page. You will need your account number, which is on your bill. Enter your account number and the amount you want to pay — you can pay the full bill, a partial amount, or more than the bill amount if you want to prepay.

Cal Water accepts payments from a checking or savings account (no fee) or a debit card (a small fee applies). Choose your payment method and enter the details. The payment processes when ready, though it may take one business day to show on your account. You will receive a confirmation number on screen and by email.

If you do not have an online account yet, you can create one during the payment process. You will need your account number and service address. Once your account is set up, you can log in anytime to see your balance, view past bills, and manage your payments.

Setting up automatic payments

Automatic payments remove the risk of forgetting your due date. On the Cal Water website, go to your account settings and look for "Autopay" or "Automatic Payments." You choose the day of the month you want the payment to come out — many people pick the day after they get paid — and whether you want to pay the full bill each month or a fixed amount.

You can change or cancel automatic payments anytime through your online account. If your bill amount changes significantly, you can adjust the payment amount or switch back to manual payments. Cal Water will send you a reminder email before each automatic payment goes through, so you can catch any problems before the money leaves your account.

Paying by phone

Call the customer service number on your bill. Have your account number ready. A representative will ask you how much you want to pay and what payment method you prefer — checking account, savings account, or debit card. The payment processes when ready over the phone, and you will receive a confirmation number.

Phone payments work during business hours. If you call outside those hours, you may reach an automated system that lets you pay without speaking to anyone. The automated system walks you through the same steps as a representative would.

Paying by mail

Write a check or money order for the amount due. Do not send cash. On the check, write your account number in the memo line so Cal Water knows which account to credit. Include the payment stub from your bill if possible — it has your account number printed on it and helps Cal Water process your payment faster.

Mail your payment to the address printed on your bill. Different Cal Water service areas may have different mailing addresses, so check your bill rather than using an old address. Allow at least 10 business days for your payment to arrive and post. If your due date is fewer than 10 business days away, do not rely on mail.

In-person payment centers

Some Cal Water service areas have local payment centers where you can pay in person with cash, check, or card. Check your bill or call customer service to find the nearest location and its hours. Payments made in person typically post to your account the same day or the next business day.

Payment centers are useful if you do not have a bank account or prefer not to share your banking information online. Bring your account number and the amount you plan to pay. Ask for a receipt so you have proof of payment.

What to do if you miss a due date

Late fees begin the day after your due date. If you realize you have missed the important date, pay as soon as possible to stop additional fees from building up. The sooner you pay, the lower your total bill will be. You can still use any payment method — online, phone, mail, or in person.

If you are having trouble paying your bill, contact Cal Water's customer service before the due date. Some service areas offer payment plans or hardship programs that let you spread the cost over several months. Cal Water will not shut off your water when ready; they must follow a process that includes notices and a chance to work out a plan.

Frequently Asked Questions

Does Cal Water charge a fee to pay online?

No fee applies if you pay from a checking or savings account. A small fee applies if you use a debit card. The exact fee amount appears on the payment screen before you confirm, so you know the cost before you pay.

How long does it take for an online payment to show on my account?

Online payments process when ready, but it may take one business day for the payment to appear in your account balance. Your confirmation number proves the payment went through, so you can use that if you need proof before it shows online.

Can I pay someone else's Cal Water bill?

Yes. You will need their account number and service address. Pay online or by phone using that information. The payment will post to their account. If you are paying in person or by mail, include the account number so there is no confusion about which bill you are paying.

What happens if I pay too much?

The overpayment stays on your account as a credit toward your next bill. You can also request a refund by contacting Cal Water customer service. They will mail you a check or credit your original payment method, depending on how you paid.

Can I set up automatic payments if I do not have a bank account?

Automatic payments require a bank account or debit card. If you do not have either, you can pay by phone, mail, or at a payment center each month. Some payment centers accept cash, which is an option if you do not use banks.