TCEQ – Texas Commission on Environmental Quality: www.tceq.texas.gov
TCEQ – Licensing and Registration: http://www2.tceq.texas.gov/lic_dpa/index.cfm
TOWA – Texas On-Site Wastewater Association: www.txowa.org
Travis County: event: www.co.travis.tx.us/tnr/permits/
Williamson County: event: www.wcchd.org/Services/Environmental/OSSF.htm