Groundwater Information System (GIC), California Groundwater Levels

These layers show the depth to groundwater below the ground surface and are based on water level measurements collected from wells.

Water level measurements are filtered based on measurement date and well construction information (where available) and are intended to approximate groundwater levels in the unconfined to uppermost semi-confined aquifers.

Measurements are values collected from wells while the contours and color ramp layers provide a smoothed approximation of the groundwater level “surface” based on the measurement data.Note that the measurement values may not exactly match the contour or color ramp values because of surface and contour smoothing process.

Depth information is represented in feet below the ground surface.Increasing values indicate increasing depth to groundwater (or deeper/lower water levels).Negative values indicate that the groundwater level is above ground surface.

Layer Attribute Explanation:
Site Code: Unique Well ID
Local Well Name:Well ID defined by local agency or well owner
State Well Number: DWR State Well Number
WCR Number: Well Completion Report number (DWR form 188)
Well Use: Intended use of well
Msmt Date: Date water level measurement was collected
Msmt Agency: Agency that collected the water level measurement
WSEL: Groundwater Surface Elevation (ft-msl), NAVD88
DGBS: Groundwater Depth Below Ground Surface – (ft), NAVD88
Reference Point Elevation: Elevation of measurement reference point (ft-msl)
Ground Surface Elevation: Elevation of ground surface at well (ft-msl)
Msmt Issue: Questionable measurement comment
Msmt Comment: General measurement comment
Latitude: Latitude, NAD83
Longitude: Longitude, NAD83
Link: Hyperlink to well information in the DWR Water Data Library