| Texas Salinity |
Salinity data for Texas rivers, bays, and estuaries from TWDB, TPWD, and TCEQ
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| NWIS IID |
USGS National Water Information System - Instantaneous and Irregular Data (address may be used in HydroExcel program to access data)
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| Texas WQ Regulations |
TCEQ Surface Water Quality Regulations for Texas, 2000
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| TCEQ stream segments & TMDL data |
GIS data for TCEQ water quality segments, impaired waters, and completed TMDLs, as shapefiles and ESRI feature classes
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| Completed TMDLs |
Completed Total Maximum Daily Load projects in Texas, 2009
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| 303(d) List |
2008 list of impaired water bodies in Texas per Section 303(d) of the Clean Water Act
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