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Geronimo Creek: Implementing Septic System Measures in a Watershed Protection Plan

The City of Seguin implemented management measures of the Geronimo and Alligator Creeks Watershed Protection Plan (WPP) by decommissioning failing septic systems and extending sewer service to some areas.


The lower portion of Geronimo Creek has has not met state water quality standards due to elevated bacteria levels since 2006. Elevated nitrate-nitrogen concentrations observed in 2000 and 2010 caused concerns for water quality as well. In 2012, stakeholders completed the WPP for Geronimo Creek and Alligator Creek , which identifies failing septic systems as one of the primary causes of the bacteria and nitrate-nitrogen concentrations in the creek. Geronimo Creek lies within the Guadalupe River Basin and flows through Comal and Guadalupe counties. 

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Project Description

This project funded the decommissioning of septic systems in areas that had recurring problems. The City of Seguin also extended sanitary sewer service into some of these areas.

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For More Information

To find out more about the NPS Program, call 512-239-6682 or e-mail us at

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