Angelina-Neches River Authority www.anra.org
Brazos River Authority www.brazos.org
Guadalupe-Blanco River Authority www.gbra.org
Houston-Galveston Area Council www.h-gac.com/HGAC/home/Default.htm
International Boundary and Water Commission www.ibwc.state.gov/CRP/welcome.htm
Lavaca-Navidad River Authority www.lnra.org
Lower Colorado River Authority www.lcra.org
Lower Neches Valley Authority www.lnva.dst.tx.us
North East Texas Municipal Water District www.netmwd.com
Nueces River Authority www.nueces-ra.org
Red River Authority www.rra.dst.tx.us
Sabine River Authority www.sra.dst.tx.us
San Antonio River Authority www.sara-tx.org
Sulphur River Basin Authority www.sulphurr.org
Texas Commission on Environmental Quality
www.tnrcc.state.tx.us/water/quality/data/wmt/index.html
U.S. Geological Survey  www.usgs.gov