Common Septic Systems in Central Texas

 In Central Texas (including areas like Austin, Travis, Hays, Bastrop, Caldwell counties), soil and site conditions often require a variety of septic system types. Here's a breakdown of the most commonly used ones:

• How it works: Wastewater flows from a septic tank into a gravel-and-pipe drain field via gravity.
   
• Where it's used: Locations with well-draining, sandy soils.
   
• Pros/Cons: Simple and low-cost; minimal maintenance—but not viable in clayey or high water-table areas. 

• How it works: Effluent is pumped under low pressure into a network of small pipes, distributing the wastewater evenly across the drain field.
   
• Best for: Sites with level terrain but poor soil absorption.
   
• Pros/Cons: More efficient in subpar soil, but pump maintenance is required.
   

Often mandated in soils that can’t handle conventional systems, ATS includes two main types:

• a. Aerobic Spray System
   
  • Treated effluent is sprayed above ground.
     
  • Works in virtually any soil type.
     
  • Requires electricity and periodic maintenance because of pumps and spray nozzles.  

• b. Aerobic Drip System
   
  • Distributes treated wastewater underground through drip lines.
     
  • Ideal for smaller lots or near water bodies.
     
  • Requires ongoing inspections and maintenance.  

• How it works: Constructs a raised sand/gravel mound over poor soil; wastewater is dose-pumped into the mound.
   
• When it's used: Areas with high water tables or shallow bedrock.
   
• Pros/Cons: Effective in difficult sites, but expensive and needs pump upkeep.