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You are here: Home / Licensing / OSSF / Texas On-Site Wastewater Treatment Research Council (TOWTRC) Projects and Reviews

Texas On-Site Wastewater Treatment Research Council (TOWTRC) Projects and Reviews

On Sept. 1, 2011, House Bill 2694 abolished the Texas On-Site Wastewater Treatment Research Council (TOWTRC). Included below are selected TOWTRC Research Projects and associated reviews by TCEQ staff.


TOWTRC Research ProjectTCEQ Review

Hydrological Attributes and Treatment Capabilities of “Caliche and Related Soils” Pertinent to On-Site Sewage Facilties

by Larry P. Wilding, Ph.D., CPAg, CPSS


Design and Operation of Land Application from a Water, Nitrogen and Salt Balance Approach

by Clifford B. Fedler, Runbin Duan, John Borrelli and Cary Green



Evaluation of Drainfield Absorption and Evapotranspiration Capacity

by Ken Rainwater, Ph.D., P.E., DEE and Andrew Jackson, Ph.D., P.E.


Review of Systems for Restaurant Wastewater Pretreatment

by Ken Rainwater, Ph.D., P.E., DEE


Improving Ammonia and Phosphorus removal in Subsurface Flow Wetlands

by Margaret G. Forbes, Joe C. Yelderman, Jr., Tina Potterton, Adam Clapp and Robert D. Doyle


Efficacy of Bacterial Reduction by Onsite Wastewater Treatments

by Stacy L.M. Pfluger, Rene Massengale and Joe C. Yelderman, Jr.


Manual for Designing Surface Application of OSSF Wastewater Effluent

by Clifford B. Fedler, John Borrelli and Runbin Duan


Effectiveness and Utility of Surface Application and Soil Percolation for Removal of Pharmaceutical and Personal Care Products

by Clifford B. Fedler, Bahar Hosseini Amoli, Brian W. Brooks, Todd Anderson, Bowen Du, Qingsong Cai, and C, Kevin Chambliss


Refining the Application Rates of Onsite Surface Application

by Clifford B. Fedler, Jordon Littlejohn, Runbin Duan, and Li Feng


Review of Potential Onsite Wastewater Disinfection Technologies

by Clifford B. Fedler, Richard Francis, Dhiraj Parekh, and Samir Blanchet


Changes in On-site Wastewater Treatment and Evaluation: Influent Equalization

by Joe C. Yelderman, Jr.


For information on additional TOWTRC funded projects, please review the following document: