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Water Resources
Water Supply Sources
The District produces approximately 75% of our water supply from local groundwater wells. These wells are located in five, local groundwater basins:
  • Bunkerhill
  • Chino
  • Lytle Creek
  • North Riverside
  • Rialto

Oliver P. Roemer Water Filtration Facility
The Oliver P. Roemer Water Filtration Facility treats local surface water from Lytle Creek and purchased water from the State Water Project's Lake Silverwood reservoir. The water goes through several treatment processes and disinfection prior to delivery.

Baseline Feeder Project
The District also purchases water from the Baseline Feeder Project. This water comes from water pumped to Rialto from wells located in San Bernardino.

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West Valley Water District | 855 W. Base Line Road | P.O. Box 920 | Rialto, CA 92377 | Ph: (909) 875-1804 | Fx: (909) 875-1849