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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 >  TCEQMAIN >  TCEQMAIN-12106

SAN GABRIEL RIVER AT RAILROAD (TCEQMAIN-12106) 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 Texas Commission on Environmental Quality (identifier TCEQMAIN), has the name "SAN GABRIEL RIVER AT RAILROAD" and has the identifier TCEQMAIN-12106. This site is in the watershed defined by the 8 digit Hydrologic Unit Code (HUC)12070205.

This site is located in Williamson County County, Texas at 30.6536000000 degrees latitude and -97.6553000000 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 "TCEQMAIN-12106" 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, Cyanobacteria 1987 - 1987
Biological, Algae, Phytoplankton 1978 - 1985
Inorganics, Major, Metals 1987 - 1987
Inorganics, Major, Non-metals 1978 - 1987
Nutrient 1978 - 1987
Physical 1978 - 2001
*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 TCEQMAIN
OrganizationFormalName Texas Commission on Environmental Quality
MonitoringLocationIdentifier TCEQMAIN-12106
MonitoringLocationName SAN GABRIEL RIVER AT RAILROAD
MonitoringLocationTypeName River/Stream
HUCEightDigitCode 12070205
LatitudeMeasure 30.6536000000
LongitudeMeasure -97.6553000000
HorizontalCollectionMethodName Interpolation-Photo
HorizontalCoordinateReferenceSystemDatumName NAD83
CountryCode US
StateCode 48
CountyCode 491
ProviderName STORET