Monitoring an overflow hazard.

HYDROLOGIC DATA

Map access to CA hydrologic monitoring data
Precipitation
Streamflow
Groundwater Levels
Water Quality
Lakes
NWIS Mapper

• NWISWeb ()
  • Real-time data ()
  • Site Information ()
  • Streamflow ()
  • Ground water ()
  • Water quality ()
  • Precipitation ()

• Historical data
  • Streamflow ()
  • Ground water ()
  • Water quality ()
  • Annual Data Reports ()

• WaterWatch ()
  • Floods/High flows ()
  • DroughtWatch ()
  • Ground water ()
  • 2007 Streamflow Summary ()

ABOUT THE CALIFORNIA WSC

• • Office information
  • Employee Directory
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USGS IN YOUR STATE

USGS Water Science Centers are located in each state.