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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.

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WQP Home >  Providers >  STORET >  CEDEN >  CEDEN-202SGR125

San Gregario US of La Honda confluence at Alpine Rd (CEDEN-202SGR125) site data in the Water Quality Portal

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

This river/stream perennial site, maintained by the California State Water Resources Control Board (identifier CEDEN), has the name "San Gregario US of La Honda confluence at Alpine Rd" and has the identifier CEDEN-202SGR125. This site is in the watershed defined by the 8 digit Hydrologic Unit Code (HUC)18050006.

This site is located in San Mateo County County, California at 37.2965000000 degrees latitude and -122.2580000000 degrees longitude using the datum NAD83. No horizontal location accuracy metadata is available. This site is at an elevation of 149 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-202SGR125" 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, Algae, Phytoplankton, Photosynthetic Pigments 2018 - 2018
Biological, Counts 2018 - 2018
Information 2018 - 2018
Inorganics, Major, Non-metals 2018 - 2018
Nutrient 2018 - 2018
Organics, Other 2018 - 2018
Physical 2018 - 2018
*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-202SGR125
MonitoringLocationName San Gregario US of La Honda confluence at Alpine Rd
MonitoringLocationTypeName River/Stream Perennial
HUCEightDigitCode 18050006
LatitudeMeasure 37.2965000000
LongitudeMeasure -122.2580000000
HorizontalCollectionMethodName Unknown
HorizontalCoordinateReferenceSystemDatumName NAD83
VerticalMeasure/MeasureValue 149
VerticalMeasure/MeasureUnitCode m
VerticalCollectionMethodName Other
VerticalCoordinateReferenceSystemDatumName UNKWN
CountryCode US
StateCode 06
CountyCode 081
ProviderName STORET