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Important for you to know:

  • New to WDFN: see current water conditions throughout the state using the new State Pages. Filter by continuous data type and age of data, view latest values, and link to graphing options to explore the data further. To learn more, read our announcement on the Water Data for the Nation blog.
Important Legacy real-time page

USGS Parameter Group Data Types Start Date End Date
Physical Unit Values 2019-05-23 2024-11-22
Water Data for the Nation inventory

Monitoring location 11173990 is associated with a Lake, Reservoir, Impoundment in Alameda County, California. Current conditions of Lake or reservoir water surface elevation above NAVD 1988 and Lake or reservoir water surface elevation above NGVD 1929 are available. Water data back to 2019 are available online.

Metadata Element Location Metadata Metadata Code
Agency
U.S. Geological Survey USGS
Site identification number
11173990 n/a
Site name
SAN ANTONIO RESERVOIR NR SUNOL CA n/a
Site type
Lake, Reservoir, Impoundment
LK
DMS latitude 373411.90 n/a
DMS longitude 1215055.34 n/a
Decimal latitude 37.5699722 n/a
Decimal longitude -121.8487056 n/a
Latitude-longitude method
Interpolated from MAP. M
Latitude-longitude accuracy
Accurate to + or - .5 sec (PLGR/PPS GPS). 5
Latitude-longitude datum
North American Datum of 1983 NAD83
Decimal Latitude-longitude datum North American Datum of 1983 NAD83
District
California 06
State
California 06
County
Alameda County 001
Country US n/a
Land net location description n/a
Name of location map LA COSTA VALLEY n/a
Scale of location map 24000 n/a
Altitude of Gage/land surface .95 feet n/a
Method altitude determined GNSS2 - Level 2 Quality Survey Grade Global Navigation Satellite System X
Altitude accuracy .16 feet n/a
Altitude datum
North American Vertical Datum of 1988 NAVD88
Subbasin hydrologic unit
18050004
Drainage basin
n/a
Topographic setting
n/a
Flags for instruments at site NNNNYNNNNNNNNNNNNNNNNNNNNNNNNN n/a
Date of first construction
n/a
Date site established or inventoried n/a
Drainage area
36.1 square miles n/a
Contributing drainage area n/a
Time Zone abbreviation PST n/a
Site honors Daylight Saving Time
Y n/a
Data reliability
n/a
Data-other GW files 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
Project number GC19ZG-10004 n/a

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