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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 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 >  NWIS >  USGS-TX >  USGS-08212400

Los Olmos Ck nr Falfurrias, TX (USGS-08212400) site data in the Water Quality Portal

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

This stream site, maintained by the USGS Texas Water Science Center (identifier USGS-TX), has the name "Los Olmos Ck nr Falfurrias, TX" and has the identifier USGS-08212400. This site is in the watershed defined by the 8 digit Hydrologic Unit Code (HUC)12110205. See more details of this site the the USGS NWIS Web page for this site. This site has a drainage area of 480 sq mi and the contributing drainage area is 476 sq mi.

This site is located in Brooks County County, Texas at 27.26448618000000 degrees latitude and -98.1358378000000 degrees longitude using the datum NAD83. The horizontal location collection method was "Interpolated from MAP." and the accuracy is 5 seconds. The source map scale is 1:24000. This site is at an elevation of 114.48 feet and the accuracy of the elevation measurement, collected using the method "GNSS2 - Level 2 Quality Survey Grade Global Navigation Satellite System" is .31 feet. The vertical coordinate reference system is NAVD88.

To download the metadata about this site along with water quality data, go to the Portal Page and enter "USGS-08212400" 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 1974 - 1981
Biological, Algae, Phytoplankton, Cyanobacteria, Periphyton 1974 - 1976
Biological, Algae, Phytoplankton, Photosynthetic Pigments 1974 - 1977
Biological, Counts 1974 - 1981
Biological, Photosynthetic Pigments 1974 - 1977
Inorganics, Major, Metals 1967 - 1981
Inorganics, Major, Non-metals 1967 - 1981
Inorganics, Minor, Metals 1975 - 1981
Inorganics, Minor, Non-metals 1975 - 1981
Microbiological 1974 - 1981
Nutrient 1967 - 1981
Organics, Other 1975 - 1981
Organics, PCBs 1979 - 1979
Organics, Pesticide 1979 - 1979
Physical 1967 - 1981
Radiochemical 1981 - 1981
Sediment 1974 - 1981
*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 USGS-TX
OrganizationFormalName USGS Texas Water Science Center
MonitoringLocationIdentifier USGS-08212400
MonitoringLocationName Los Olmos Ck nr Falfurrias, TX
MonitoringLocationTypeName Stream
HUCEightDigitCode 12110205
DrainageAreaMeasure/MeasureValue 480
DrainageAreaMeasure/MeasureUnitCode sq mi
ContributingDrainageAreaMeasure/MeasureValue 476
ContributingDrainageAreaMeasure/MeasureUnitCode sq mi
LatitudeMeasure 27.26448618000000
LongitudeMeasure -98.1358378000000
SourceMapScaleNumeric 24000
HorizontalAccuracyMeasure/MeasureValue 5
HorizontalAccuracyMeasure/MeasureUnitCode seconds
HorizontalCollectionMethodName Interpolated from MAP.
HorizontalCoordinateReferenceSystemDatumName NAD83
VerticalMeasure/MeasureValue 114.48
VerticalMeasure/MeasureUnitCode feet
VerticalAccuracyMeasure/MeasureValue .31
VerticalAccuracyMeasure/MeasureUnitCode feet
VerticalCollectionMethodName GNSS2 - Level 2 Quality Survey Grade Global Navigation Satellite System
VerticalCoordinateReferenceSystemDatumName NAVD88
CountryCode US
StateCode 48
CountyCode 047
ProviderName NWIS