Healthy Creeks Need Active Stewardship

It’s not uncommon for waterways in high-growth areas to become impaired — which means contaminated by pollutants and no longer meeting State water quality standards for a designated beneficial use.

That’s what happened to Geronimo Creek and its tributary Alligator Creek, located in Comal and Guadalupe Counties. The almost 70-square-mile watershed for these two creeks lies within the larger Guadalupe River Basin. Straddling IH-35, this creek is in the rapidly developing corridor between Austin and San Antonio.

In 2008, Geronimo Creek was listed by the State of Texas as having elevated E. coli bacteria (impairing contact-recreation) and for elevated nitrate-nitrogen levels (which can lead to excessive algae growth).

In response, a watershed partnership was formed by local stakeholders. The Geronimo and Alligator Creeks Watershed Protection Plan (WPP), driven by an open public process, was developed and adopted in 2012.

The WPP identifies key water quality issues, determines the contributing factors, and now provides an ongoing guide for restoring water quality in Geronimo and Alligator Creeks. This includes land management programs and public outreach efforts targeted to restore and protect the vital water resources within this watershed.

All communities and residents within the watershed have a role to play in restoration and ongoing stewardship of Geronimo and Alligator Creeks.

Please browse this website to lean more, subscribe to our newsletter, and get involved.

What is a watershed?

– the area of land from which water drains into a river, lake, or other waterbody. Water flows across or under the land and into the waterbody by way of creeks, rivers, and underground aquifers. River basins can have numerous watersheds.

The upper portion of the watershed lies in the extra-territorial jurisdiction (ETJ) of New Braunfels, while the lower portion is in the ETJ of Seguin.

Events

2026 Spring Cleanup

Join us for a fun day of collecting litter around our community! When you arrive, there will be a short safety talk before the cleanup…

Texas Watershed Steward Program

The Texas Watershed Steward Program is a free, educational workshop designed to help residents improve their water resources by getting involved in local watershed protection…

Fall Stream Cleanup

Register Today! Want to make a difference in your community? Join us in picking up litter in the Geronimo and Alligator Creeks Watershed. Free breakfast…

Lone Star Healthy Streams Program – Sept 12

Save the Date for the Lone Star Healthy Streams Program- September 12! Join us for a FREE educational event in Seguin. Learn about feral hog…

News

2026 Spring Cleanup

Join us for a fun day of collecting litter around our community! When you arrive, there will be a short safety talk before the cleanup…

Geronimo Flow – January Newsletter

A Note from Your Watershed Coordinator Congratulations on making it through the holiday season and into a bright new year! Whether you are still savoring…

Geronimo Flow – October Newsletter

A Note from Your Watershed Coordinator It was wonderful to see so many engaged stakeholders at the September 12 Lone Star Healthy Streams workshop! Together…

Fall Stream Cleanup

Register Today! Want to make a difference in your community? Join us in picking up litter in the Geronimo and Alligator Creeks Watershed. Free breakfast…