Local Water
Groundwater
51% – Over half of the District’s water supply is from its own groundwater wells, located in five local basins:
- Chino Basin
- Bunker Hill Basin
- Lytle Creek Basin
- North Riverside Basin
- Rialto-Colton Basin
17% – Additional groundwater is purchased from San Bernardino Valley Municipal Water District through the Base Line Feeder Project. This water also comes from local wells in the Bunker Hill Basin.
Surface Water
18% – The District obtains a portion of its surface water from Lytle Creek in the San Bernardino Mountains. This water is treated through the District’s Oliver P. Roemer Water Filtration Facility.
