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-312OFN

Little Oso Flaco Creek @ railroad trestles (CEDEN-312OFN) 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 "Little Oso Flaco Creek @ railroad trestles" and has the identifier CEDEN-312OFN. This site is in the watershed defined by the 8 digit Hydrologic Unit Code (HUC)18060006.

This site is located in San Luis Obispo County County, California at 35.0228000000 degrees latitude and -120.5860000000 degrees longitude using the datum NAD83. No horizontal 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-312OFN" 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 2000 - 2019
Information 2010 - 2018
Inorganics, Major, Metals 2000 - 2008
Inorganics, Major, Non-metals 2000 - 2008
Inorganics, Minor, Metals 2013 - 2018
Inorganics, Minor, Non-metals 2000 - 2018
Not Assigned 2013 - 2013
Nutrient 2000 - 2019
Organics, Other 2013 - 2018
Organics, Pesticide 2006 - 2018
Physical 2000 - 2020
*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-312OFN
MonitoringLocationName Little Oso Flaco Creek @ railroad trestles
MonitoringLocationTypeName River/Stream
MonitoringLocationDescriptionText Sample site is located on private property, no public access
HUCEightDigitCode 18060006
LatitudeMeasure 35.0228000000
LongitudeMeasure -120.5860000000
HorizontalCollectionMethodName Unknown
HorizontalCoordinateReferenceSystemDatumName NAD83
CountryCode US
StateCode 06
CountyCode 079
ProviderName STORET