To set up new service you could either call or go into the office:
Office Location Rialto Water Services 437 N Riverside Rialto, CA 92376
Call Information: Customer Service Phone: 909-820-2546
A deposit is required to establish new service. The amount of deposit is based on the size of your water meter and the average monthly bill for the previous year. Please call 909-820-2546 for deposit amounts.
Questions / After-Hour Emergencies
If you have any further questions concerning the Water and/or Sewer portion of your bill, please call 909-820-2546 between 8 am and 5 pm. Monday through Friday. For after-hour water emergencies, please call 909-820-2546.