Live Dashboard
Groundwater Monitoring
Central Valley groundwater data — wells, hydrology contours, flow direction, subsidence, and water quality.
90,566
Total Wells
7
Counties
Real-time
Subsidence Data
4
Risk Categories
Map Layers
Interactive Groundwater Map
Toggle between well types, hydrology layers, and risk zones to explore basin conditions in real time.
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90,566 Wells
Irrigation, domestic, monitoring, public supply, and industrial wells across 7 counties
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Groundwater Contours
DWR ArcGIS tile layers for seasonal elevation and level-change contours
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C2VSim Watersheds
Fine-grid watershed boundaries from DWR's C2VSim model
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Flow Direction
Computed flow arrows showing groundwater movement from Sierra foothills to valley trough
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Monitoring Stations
Active measurement stations with count and basin data
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Risk Zones
Land subsidence zones (critical/high/moderate) and water quality alert areas
Launch Interactive Map
Opens the full Mapbox-powered dashboard with all well and hydrology data