Alternative channels
Mail, text, and in-person payment instructions
Pay by text
The Paymentus guest-pay form asks for the account number and email and can text the barcode from the California American Water bill to a customer for use at an authorized payment location. The reviewed 2026 materials do not publish a standalone text-to-pay keyword, short code, or recurring SMS enrollment procedure; customers should use the MyWater/Paymentus portal or the 1-855-748-6066 IVR.
Mail-in address
California American Water, P.O. Box 7150, Pasadena, CA 91109-7150. Send the payment with the bill stub; do not send cash or use staples or paper clips. The Pasadena lockbox is the company’s published mailed-payment address for East Pasadena accounts.
Counters, drop boxes, and office hours
Customers may use an authorized California American Water payment location by presenting the barcode on the bill and knowing the amount due; the available-location list changes periodically and customers should confirm acceptance before traveling. The current billing page does not identify a fixed East Pasadena cashier or counter hours. General non-emergency customer service is Monday–Friday 7:00 a.m.–7:00 p.m.; water emergencies are handled 24/7 at 1-888-237-1333. Payment locations may accept check, cash, or card depending on the authorized retailer, so the location should be checked first.