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Your Water
Sources of Supply
West Valley Water District obtains water from both local and imported sources to serve its customers.
Today the District serves approximately 100,000 residents and is continuing to grow.
Groundwater (60%)
WVWD’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
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 (40%)
The District obtains a portion of its surface water from Lytle Creek in the San Bernardino Mountains and purchases additional supply from the State Water Project through the San Bernardino Valley Municipal Water District.
This water is also treated through the District’s Oliver P. Roemer Water Filtration Facility.
How Safe Is Our Water?
We’re vigilant when it comes to safeguarding our water supplies. Our water meets all Federal and State Regulations. We’re proud to report that our District always meets, and exceeds, these standards.
2025 Water Quality Report 2025 Water Quality Report -Spanish