Available data

Select data types to graph from categories based on the way the data were collected.

3 data types available - data from 1987-10-02 to 2026-08-01

5 data types available - data from 1929-10-01 to 2026-07-30

2 data types available - data from 1929-12-11 to 2026-07-24

43 Observed properties (data types) available - with data from 1952-02-10 to 1979-05-02

184 Sampling activities

3 data types available - data from 1929-10-01 to 2026-07-30

Zoom out to see link to My Favorites

Operated in cooperation with:

Metadata Element	Location Metadata	Metadata Code
Agency	U.S. Geological Survey	USGS
Location identification number	11456000	n/a
Location name	NAPA R NR ST HELENA CA	n/a
Site type	Stream	ST
Decimal latitude (WGS84)	38.51126404633286	n/a
Decimal longitude (WGS84)	-122.45577790042748	n/a
Latitude-longitude method	Interpolated from map	M
Latitude-longitude accuracy	Accurate to + or - 1 sec.	S
District	California	06
State	California	06
County	Napa County	055
Country	United States of America	n/a
Altitude of gage/land surface	191.33 feet	n/a
Method altitude determined	GNSS3 - Level 3 Quality Survey Grade Global Navigation Satellite System	Y
Altitude accuracy	0.26 feet	n/a
Altitude datum	North American Vertical Datum of 1988	NAVD88
Subbasin hydrologic unit	San Pablo Bay	18050002
Drainage basin		n/a
Date of first construction		n/a
Drainage area	78.8 square miles	n/a
Contributing drainage area		n/a
Time zone abbreviation	PST	n/a
Site honors Daylight Saving Time	Y	n/a
National aquifer		n/a
Local aquifer		n/a
Local aquifer type		n/a
Well depth		n/a
Hole depth		n/a
Source of depth data		n/a