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.

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 legacy user interface will continue to function for several weeks. However, this user interface only serves WQX2.2 profiles, which do NOT contain USGS data added after March 11, 2024.

WQP Home >  Providers >  STORET >  CEDEN >  CEDEN-207WAL410

Las Trampas above dirt bike jumps (CEDEN-207WAL410) site data in the Water Quality Portal

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

This river/stream site, maintained by the California State Water Resources Control Board (identifier CEDEN), has the name "Las Trampas above dirt bike jumps" and has the identifier CEDEN-207WAL410. This site is in the watershed defined by the 8 digit Hydrologic Unit Code (HUC)18050001.

This site is located in Contra Costa County County, California at 37.8678000000 degrees latitude and -122.0980000000 degrees longitude using the datum WGS84. No horizontal location accuracy metadata is available. This site is at an elevation of 114 m No vertical location accuracy metadata is available.

To download the metadata about this site along with water quality data, go to the Portal Page and enter "CEDEN-207WAL410" 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*
Biological, Counts 2003 - 2010
Nutrient 2008 - 2008
Physical 2008 - 2012
*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 CEDEN
OrganizationFormalName California State Water Resources Control Board
MonitoringLocationIdentifier CEDEN-207WAL410
MonitoringLocationName Las Trampas above dirt bike jumps
MonitoringLocationTypeName River/Stream
MonitoringLocationDescriptionText Las Trampas Creek above Grizzly Creek
HUCEightDigitCode 18050001
LatitudeMeasure 37.8678000000
LongitudeMeasure -122.0980000000
HorizontalCollectionMethodName GPS-Unspecified
HorizontalCoordinateReferenceSystemDatumName WGS84
VerticalMeasure/MeasureValue 114
VerticalMeasure/MeasureUnitCode m
VerticalCollectionMethodName Other
VerticalCoordinateReferenceSystemDatumName UNKWN
CountryCode US
StateCode 06
CountyCode 013
ProviderName STORET