Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

New WQX 3.0 profiles are available at waterqualitydata.us/beta/. These profiles will contain recent USGS data added since March 11, 2024, which marks the beginning of limited accessibility for USGS data. Read more about the 3.0 profiles and associated changes here. This user interface only serves WQX2.2 profiles, which do NOT contain USGS data added after March 11, 2024.

WQP Home >  Providers >  NWIS >  USGS-CA >  USGS-11458000

NAPA R NR NAPA CA (USGS-11458000) site data in the Water Quality Portal

Data Provider: NWIS (Learn more about Water Quality Portal Data Providers)

This stream site, maintained by the USGS California Water Science Center (identifier USGS-CA), has the name "NAPA R NR NAPA CA" and has the identifier USGS-11458000. This site is in the watershed defined by the 8 digit Hydrologic Unit Code (HUC)18050002. See more details of this site the the USGS NWIS Web page for this site. This site has a drainage area of 218 sq mi.

This site is located in Napa County County, California at 38.36824570000000 degrees latitude and -122.3033085000000 degrees longitude using the datum NAD83. The horizontal location collection method was "Interpolated from MAP." and the accuracy is 5 seconds. This site is at an elevation of 24.74 feet and the accuracy of the elevation measurement, collected using the method "Level or other surveyed method." is .01 feet. The vertical coordinate reference system is NGVD29.

To download the metadata about this site along with water quality data, go to the Portal Page and enter "USGS-11458000" into the "Site ID" box under Site Parameters

What other monitoring locations are upstream or downstream from this one?

Upstream and downstream locations

This map shows all Water Quality Portal stations that are 10 miles upstream (dashed dark blue) and 10 miles downstream (solid light blue) of this monitoring location (indicated by the large blue circle). The upstream and downstream functionality is provided by the Network Linked Data Index.

When were data collected at this location?

Periods of record for data characteristic groups

For a more detailed breakdown of data, go to the Monitoring Report at the EPA How's My Waterway Application
Characteristic Group Date Range*
Biological 1978 - 1978
Biological, Algae, Phytoplankton 1978 - 1981
Biological, Algae, Phytoplankton, Cyanobacteria, Periphyton 1975 - 1980
Biological, Algae, Phytoplankton, Photosynthetic Pigments 1975 - 1980
Biological, Counts 1978 - 1981
Biological, Photosynthetic Pigments 1975 - 1980
Biological, Primary Production 1978 - 1978
Information 1970 - 1993
Inorganics, Major, Metals 1971 - 1993
Inorganics, Major, Non-metals 1970 - 1993
Inorganics, Minor, Metals 1971 - 1993
Inorganics, Minor, Non-metals 1971 - 1993
Microbiological 1978 - 1993
Nutrient 1971 - 1993
Organics, Other 1971 - 1981
Organics, PCBs 1976 - 1979
Organics, Pesticide 1976 - 1979
Physical 1970 - 2018
Radiochemical 1981 - 1981
Sediment 1970 - 1993
*Date ranges may contain gap years

What other information is available for this location?

Detailed Metadata

For the definitions of the metadata elements, please go to the Water Quality Portal user guide

Location Metadata Value
OrganizationIdentifier USGS-CA
OrganizationFormalName USGS California Water Science Center
MonitoringLocationIdentifier USGS-11458000
MonitoringLocationName NAPA R NR NAPA CA
MonitoringLocationTypeName Stream
HUCEightDigitCode 18050002
DrainageAreaMeasure/MeasureValue 218
DrainageAreaMeasure/MeasureUnitCode sq mi
LatitudeMeasure 38.36824570000000
LongitudeMeasure -122.3033085000000
HorizontalAccuracyMeasure/MeasureValue 5
HorizontalAccuracyMeasure/MeasureUnitCode seconds
HorizontalCollectionMethodName Interpolated from MAP.
HorizontalCoordinateReferenceSystemDatumName NAD83
VerticalMeasure/MeasureValue 24.74
VerticalMeasure/MeasureUnitCode feet
VerticalAccuracyMeasure/MeasureValue .01
VerticalAccuracyMeasure/MeasureUnitCode feet
VerticalCollectionMethodName Level or other surveyed method.
VerticalCoordinateReferenceSystemDatumName NGVD29
CountryCode US
StateCode 06
CountyCode 055
ProviderName NWIS