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Lake Sam Rayburn and Attoyac Bayou: Septic System Inventory, Repair and Replacement

A project to improve water quality by identifying and addressing issues with OSSFs in the area draining to Sam Rayburn Reservoir.


Attoyac Bayou is a rural stream that flows into Sam Rayburn Reservoir with designated uses for primary contact recreation, public water supply and high aquatic life use. Attoyac Bayou has been impaired (not meeting Water Quality Standards) due to high bacteria levels since 2012.

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Project Description

The Angelina-Neches River Authority (ANRA) has developed a database of septic systems in the Control Zone Rayburn (CZR), the 2000-ft buffer zone around Sam Rayburn Reservoir. ANRA is working with county representatives toward standardizing local data on septic systems. ANRA is using the database, together with field reconnaissance and inspections, to track and map all permitted systems in the area. ANRA offered assistance to homeowners to repair or replace septic systems in the Attoyac Bayou Watershed.

A second NPS grant project is funding an extension of these tracking and assistance efforts with a focus on the Attoyac Bayou watershed.

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For More Information

To find out more about the NPS Program, call 512-239-6682 or e-mail us at nps@tceq.texas.gov.

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