Available data

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

5 data types available - data from 1986-11-30 to 2026-08-14

6 data types available - data from 1923-10-01 to 2026-08-12

2 data types available - data from 1988-09-19 to 2026-08-10

1168 Observed properties (data types) available - with data from 1950-12-02 to 2026-07-28

11238 Sampling activities

2 data types available - with data from 1923-10-15 to 2025-03-20

4 data types available - data from 1923-10-01 to 2026-08-12

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	11303500	n/a
Location name	SAN JOAQUIN R NR VERNALIS CA	n/a
Site type	Stream	ST
Decimal latitude (WGS84)	37.67601248567997	n/a
Decimal longitude (WGS84)	-121.26629072468957	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	San Joaquin County	077
Country	United States of America	n/a
Altitude of gage/land surface	2.57 feet	n/a
Method altitude determined	GNSS2 - Level 2 Quality Survey Grade Global Navigation Satellite System	X
Altitude accuracy	0.16 feet	n/a
Altitude datum	North American Vertical Datum of 1988	NAVD88
Subbasin hydrologic unit	San Joaquin Delta	18040003
Drainage basin		n/a
Date of first construction		n/a
Drainage area	13539 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