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.

WQP Home >  Providers >  STORET >  CALWR_WQX >  CALWR_WQX-D41A

San Pablo Bay near Mouth of Petaluma River (CALWR_WQX-D41A) site data in the Water Quality Portal

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

This other-surface water site, maintained by the California Department Of Water Resources (identifier CALWR_WQX), has the name "San Pablo Bay near Mouth of Petaluma River" and has the identifier CALWR_WQX-D41A. This site is in the watershed defined by the 8 digit Hydrologic Unit Code (HUC)18050002.

This site is located in Sonoma County County, California at 38.0847000000 degrees latitude and -122.3907000000 degrees longitude using the datum NAD83. The horizontal location collection method was "GPS-Unspecified" and the accuracy is 1 ft.

To download the metadata about this site along with water quality data, go to the Portal Page and enter "CALWR_WQX-D41A" 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*
Inorganics, Major, Non-metals 2004 - 2015
Physical 2004 - 2015
*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 CALWR_WQX
OrganizationFormalName California Department Of Water Resources
MonitoringLocationIdentifier CALWR_WQX-D41A
MonitoringLocationName San Pablo Bay near Mouth of Petaluma River
MonitoringLocationTypeName Other-Surface Water
MonitoringLocationDescriptionText In San Pablo Bay about 1 km from the mouth of the Petaluma River in a East South-East direction.
HUCEightDigitCode 18050002
LatitudeMeasure 38.0847000000
LongitudeMeasure -122.3907000000
HorizontalAccuracyMeasure/MeasureValue 1
HorizontalAccuracyMeasure/MeasureUnitCode ft
HorizontalCollectionMethodName GPS-Unspecified
HorizontalCoordinateReferenceSystemDatumName NAD83
CountryCode US
StateCode 06
CountyCode 097
ProviderName STORET