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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
Biological Water-quality 2016-05-25 2018-10-17
Information Water-quality 1998-10-08 2023-09-22
Inorganics, Major, Non-metals Water-quality 2006-01-04 2018-10-17
Nutrient Water-quality 2011-04-11 2020-10-20
Organics, other Water-quality 2011-04-11 2018-10-17
Organics, pesticide Water-quality 2011-04-11 2011-06-13
Physical Unit Values, Water-quality 1998-10-08 2024-11-22
Sediment Unit Values, Water-quality 1994-02-08 2024-11-22
n/a Site Visits 2013-01-10 2014-01-15
Water Data for the Nation inventory

Monitoring location 11185185 is associated with a Stream in Contra Costa County, California. Current conditions of Suspended sediment concentration and Turbidity are available. Water data back to 1994 are available online.

Metadata Element Location Metadata Metadata Code
Agency
U.S. Geological Survey USGS
Site identification number
11185185 n/a
Site name
SUISUN BAY A MALLARD IS CA n/a
Site type
Stream
ST
DMS latitude 380234 n/a
DMS longitude 1215509 n/a
Decimal latitude 38.04269787 n/a
Decimal longitude -121.9202374 n/a
Latitude-longitude method
Interpolated from MAP. M
Latitude-longitude accuracy
Accurate to + or - 1 sec. S
Latitude-longitude datum
North American Datum of 1927 NAD27
Decimal Latitude-longitude datum North American Datum of 1983 NAD83
District
California 06
State
California 06
County
Contra Costa County 013
Country US n/a
Land net location description n/a
Name of location map HONKER BAY n/a
Scale of location map 24000 n/a
Altitude of Gage/land surface 0 feet n/a
Method altitude determined Interpolated from topographic map. M
Altitude accuracy 5 feet n/a
Altitude datum
National Geodetic Vertical Datum of 1929 NGVD29
Subbasin hydrologic unit
18050001
Drainage basin
n/a
Topographic setting
Stream channel
C
Flags for instruments at site NNNNYNNNNNNNNNNNNNNNNNNNNNNNNN n/a
Date of first construction
n/a
Date site established or inventoried 19860627 n/a
Drainage area
n/a
Contributing drainage area n/a
Time Zone abbreviation PST n/a
Site honors Daylight Saving Time
N n/a
Data reliability
n/a
Data-other GW files NNNNNNNN 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 470648400 n/a