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 user interface only serves WQX2.2 profiles, which do NOT contain USGS data added after March 11, 2024.

WQP Home >  Providers >  STORET >  TCEQMAIN >  TCEQMAIN-10434

LAKE TAWAKONI MID LAKE NR DAM (TCEQMAIN-10434) site data in the Water Quality Portal

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

This reservoir site, maintained by the Texas Commission on Environmental Quality (identifier TCEQMAIN), has the name "LAKE TAWAKONI MID LAKE NR DAM" and has the identifier TCEQMAIN-10434. This site is in the watershed defined by the 8 digit Hydrologic Unit Code (HUC)12010001.

This site is located in Rains County County, Texas at 32.8275000000 degrees latitude and -95.9225000000 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-10434" 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 1976 - 2006
Biological, Algae, Phytoplankton 1972 - 2025
Biological, Counts 2012 - 2017
Information 1972 - 2025
Inorganics, Major, Metals 1981 - 2003
Inorganics, Major, Non-metals 1972 - 2025
Inorganics, Minor, Metals 1974 - 2024
Inorganics, Minor, Non-metals 1974 - 2024
Microbiological 1973 - 2025
Nutrient 1973 - 2025
Organics, Other 1974 - 2025
Organics, PCBs 1974 - 1976
Organics, Pesticide 1976 - 1991
Physical 1972 - 2025
Stable Isotopes 1985 - 1985
*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-10434
MonitoringLocationName LAKE TAWAKONI MID LAKE NR DAM
MonitoringLocationTypeName Reservoir
HUCEightDigitCode 12010001
LatitudeMeasure 32.8275000000
LongitudeMeasure -95.9225000000
HorizontalCollectionMethodName Interpolation-Photo
HorizontalCoordinateReferenceSystemDatumName NAD83
CountryCode US
StateCode 48
CountyCode 379
ProviderName STORET