Warning: Javascript must be enabled to use all the features on this page!


Page Loading - Please Wait...

Click to hideNews Bulletins
  • Due to a lapse in government funding, the majority of USGS websites will not be updated except to provide important public safety information. Websites displaying real-time water data will be updated with limited support. For more information please see www.doi.gov/shutdown.
  • Explore the NEW USGS National Water Dashboard interactive map to access real-time water data from over 13,500 stations nationwide.

USGS 11458000 NAPA R NR NAPA CA

  Stream Site

DESCRIPTION:
Latitude 38°22'06",   Longitude 122°18'08"   NAD27
Napa County, California, Hydrologic Unit 18050002
Drainage area: 218 square miles
Datum of gage: 27.14 feet above   NAVD88.
AVAILABLE DATA:
Data Type Begin Date End Date Count
 Current / Historical Observations     (availability statement)    1981-12-19  2025-10-24  
 Daily Data
    Temperature, water, degrees Celsius  1978-06-22  1981-10-19  1794 
    Temperature, water, degrees Celsius  2018-01-09  2025-10-23  942 
    Temperature, water, degrees Celsius  1976-10-01  1978-06-21  203 
    Discharge, cubic feet per second  1929-10-01  2025-10-23  25225 
    Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius  1978-06-22  1981-10-19  2031 
    Turbidity, water, unfiltered, monochrome near infra-red LED light, 780-900 nm, detection angle 90 +-2.5 degrees, formazin nephelometric units (FNU)  2018-01-09  2025-10-23  942 
    Suspended sediment concentration, milligrams per liter  1976-10-01  1978-09-29  729 
    Suspended sediment discharge, short tons per day  1976-10-01  1978-09-29  729 
 Daily Statistics 
    Temperature, water, degrees Celsius  2018-01-09  2018-05-31 143 
    Discharge, cubic feet per second  1929-10-01  2025-04-14 25033 
    Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius  1978-06-22  1981-10-19 677 
    Suspended sediment concentration, milligrams per liter  1976-10-01  1978-09-29 729 
    Suspended sediment discharge, short tons per day  1976-10-01  1978-09-29 729 
 Monthly Statistics 
    Temperature, water, degrees Celsius  2018-01  2018-05  
    Discharge, cubic feet per second  1929-10  2025-04  
    Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius  1978-06  1981-10  
    Suspended sediment concentration, milligrams per liter  1976-10  1978-09  
    Suspended sediment discharge, short tons per day  1976-10  1978-09  
 Annual Statistics 
    Temperature, water, degrees Celsius  2018  2018  
    Discharge, cubic feet per second  1930  2025  
    Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius  1978  1982  
    Suspended sediment concentration, milligrams per liter  1977  1978  
    Suspended sediment discharge, short tons per day  1977  1978  
 Peak streamflow 1929-12-15  2024-02-05  68 
 Field measurements 1959-10-02  2025-09-22  630 
 Field/Lab water-quality samples (Legacy QW is frozen as of March 2024, newer data may be found on MLP) 1970-05-05  2018-04-08  586 
 Water-Year Summary 2005  2024  20 
 Revisions  Loading...
OPERATION:
Record for this site is maintained by the USGS California Water Science Center
Email questions about this site to California Water Science Center Water-Data Inquiries