National Groundwater
Association
www.ngwa.org

Texas Ground Water Association
www.tgwa.org/

Texas Rural Water Association
www.trwa.org/

Texas Rainwater
Catchment Association
www.texrca.org/

Texas Commission on
Environmental Quality
www.tceq.state.tx.us/

O2 Aeration Technologies
www.advancedaeration.net
/o2aeration/licensed/template/home.php