The District produces approximately 75% of our water supply from local groundwater wells. These wells are located in five, local groundwater basins:
Oliver P. Roemer Water Filtration Facility
- Lytle Creek
- North Riverside
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.