If you are looking for rialto ca sewer utilities, please check our official links below: Rialto Water Services Utility Billing http://www.rialtowaterservices.com/ Water & Sewer Payment Guidelines | Rialto, CA https://www.yourrialto.com/533/Water-Sewer-Payment-Guidelines Take a look at water and sewer payment guidelines. ... Rialto , CA 92376; Call Information: Customer Service Phone: 909-820-2546....