SPADRA BASIN:
SUPPLYING LOCAL COMMUNITIES WITH VITAL GROUNDWATER
The Spadra Basin lies beneath the San Gabriel Valley, in the western portion of the City of Pomona. This aquifer supplies groundwater primarily to the City of Pomona, Walnut Valley Water District and Cal Poly Pomona. Rowland Water District is also a primary stakeholder in the basin. Water from the basin is used by local residents and for industrial and irrigation purposes.
The City of Pomona and the Walnut Valley Water District are collaborating to sustainably manage the basin, by forming the Spadra Basin Groundwater Sustainability Agency (GSA). This partnership will help protect groundwater quality, manage local water supplies and expand water storage at the basin.
The City of Pomona is the seventh largest city in Los Angeles County, with a population of more than 151,000 people. The city operates groundwater wells in the Spadra Basin.
The Walnut Valley Water District is located in the San Gabriel Valley and serves more than 102,600 residents. The District operates groundwater wells in the Spadra Basin and has land use responsibilities in the surrounding area.