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New WQX 3.0 profiles are available at waterqualitydata.us/beta/. These profiles will contain recent USGS data added since March 11, 2024, which marks the beginning of limited accessibility for USGS data. Read more about the 3.0 profiles and associated changes here. This user interface only serves WQX2.2 profiles, which do NOT contain USGS data added after March 11, 2024.

WQP Home >  Providers >  STORET >  CALWR_WQX >  CALWR_WQX-DES WQ 50

San Joaquin Rv @ Antioch (CALWR_WQX-DES WQ 50) 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 Joaquin Rv @ Antioch" and has the identifier CALWR_WQX-DES WQ 50. This site is in the watershed defined by the 8 digit Hydrologic Unit Code (HUC)18040003.

This site is located in Contra Costa County County, California at 38.0177778000 degrees latitude and -121.8016666700 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-DES WQ 50" 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 2002 - 2015
Physical 2002 - 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-DES WQ 50
MonitoringLocationName San Joaquin Rv @ Antioch
MonitoringLocationTypeName Other-Surface Water
MonitoringLocationDescriptionText site located inside the City of Antioch water pumphouse
HUCEightDigitCode 18040003
LatitudeMeasure 38.0177778000
LongitudeMeasure -121.8016666700
HorizontalAccuracyMeasure/MeasureValue 1
HorizontalAccuracyMeasure/MeasureUnitCode ft
HorizontalCollectionMethodName GPS-Unspecified
HorizontalCoordinateReferenceSystemDatumName NAD83
CountryCode US
StateCode 06
CountyCode 013
ProviderName STORET