Bexar County County · Pop. 1,434,625
San Antonio is the seventh-largest city in the United States and the cultural heart of South Texas, but it faces a unique and consequential relationship between urban growth and one of the nation's most critical freshwater resources — the Edwards Aquifer. This massive karst limestone aquifer provides drinking water to over 2 million people across the San Antonio region, and every septic system installed in the aquifer's recharge zone carries direct potential consequences for its water quality. The Texas Commission on Environmental Quality and the Edwards Aquifer Authority exercise overlapping jurisdiction over on-site sewage in the recharge zone, making this one of the most rigorously regulated septic environments in Texas. As San Antonio continues its rapid northwestward expansion into the Hill Country and the aquifer recharge zone, the tension between development and aquifer protection is a defining issue in Bexar and surrounding counties.
Restore or replace failed leach fields and drain lines to prevent sewage surfacing and groundwater contamination.
$2,000 – $15,000
Commercial grease trap cleaning and pumping to prevent sewer blockages and maintain health code compliance.
$200 – $800
Comprehensive evaluation of your septic system's condition, required for real estate transactions in most states.
$300 – $600
Complete new septic system design and installation, from perc testing to final inspection.
$3,500 – $20,000
Regular pumping removes accumulated solids from your septic tank, preventing backups and extending system life.
$275 – $600
Diagnose and fix septic system problems including leaks, clogs, baffle failures, and component replacements.
$500 – $5,000
Professional water well drilling for residential and commercial properties without access to municipal water.
$6,000 – $25,000
Diagnose and repair well pump failures, pressure tank issues, and water flow problems.
$300 – $3,000
San Antonio, TX 00000
A+ Septic Service: Septic Contractors provides professional septic services in San Antonio, TX and surrounding areas. Contact them for a free estimate on pumping, repair, and inspection services.
Austin, TX 00000
Austin Septic Supply Company, Inc.: Septic Supplies provides professional septic services in Austin, TX and surrounding areas. Contact them for a free estimate on pumping, repair, and inspection services.
Austin, TX 00000
Austin Septic Tank Pumping, Cleaning, Repair & Installation provides professional septic services in Austin, TX and surrounding areas. Contact them for a free estimate on pumping, repair, and inspection services.
San Antonio, TX 00000
Cisco Septic Service: San Antonio Area Septic Pumping provides professional septic services in San Antonio, TX and surrounding areas. Contact them for a free estimate on pumping, repair, and inspection services.
San Antonio, TX 00000
MJ SEPTIC provides professional septic services in San Antonio, TX and surrounding areas. Contact them for a free estimate on pumping, repair, and inspection services.
Austin, TX 00000
Pro-Tec Septic: Septic System Experts In Austin, TX provides professional septic services in Austin, TX and surrounding areas. Contact them for a free estimate on pumping, repair, and inspection services.
San Antonio, TX 00000
Superior Plus Septic Service: Septic System Service ... provides professional septic services in San Antonio, TX and surrounding areas. Contact them for a free estimate on pumping, repair, and inspection services.
| Service | Average Cost |
|---|---|
| Septic Tank Pumping | $300 - $500 |
| Septic System Installation | $8,000 - $25,000 |
Comfort and Brackett soil series on the Edwards Plateau — thin, stony clay loams over Edwards Limestone with 6–18 inches of soil depth on most rural parcels. Percolation rates are highly variable: karst solution cavities create zones of extremely rapid drainage (< 1 min/inch) that provide no sewage treatment, while clay-filled fissures in the same limestone produce rates of 60–120 min/inch. Urban Bexar County to the east has deeper Lewisville and Houston Black clay (Vertisols) with very slow percolation.
San Antonio sits at the boundary of two dramatically different geological worlds. To the northwest, the Edwards Plateau's thin Comfort and Brackett soils over karstified Edwards Limestone offer minimal natural treatment of septic effluent — solution cavities in the limestone can convey untreated wastewater directly to the aquifer, which is why the EAA mandates ATUs in the recharge zone. To the southeast and east, San Antonio transitions onto the Coastal Plain where Houston Black and Lewisville series Vertisols — expansive smectite clays — form an entirely different challenge. These black clay soils with 2:1 clay mineralogy shrink and crack in summer drought and swell to near-impermeability when wet, creating dramatic seasonal swings in percolation rate that conventional drain fields handle poorly.
TCEQ's OSSF rules (Title 30 Texas Administrative Code Chapter 285) govern all on-site sewage in Texas. Bexar County is an authorized agent that administers the program locally. In the Edwards Aquifer Recharge Zone, the Edwards Aquifer Authority (EAA) has independent authority under SB 1477 to regulate impervious cover, wastewater, and other activities affecting recharge. EAA regulations require enhanced treatment — typically aerobic treatment units (ATUs) with surface spray or drip irrigation — for new OSSF installations in the recharge zone. In the contributing zone (where water flows toward the recharge zone), TCEQ requires at minimum a conventional system with 2-foot vertical separation from the seasonal high water table. Properties in the artesian zone (under the aquifer) follow standard TCEQ rules without EAA overlay.
Septic system permitting in San Antonio and Bexar County is regulated by the Texas Commission on Environmental Quality (TCEQ) through its On-Site Sewage Facility (OSSF) program. Bexar County has authorized agent status, meaning the county's own staff administer the TCEQ program locally. City of San Antonio properties are almost entirely on municipal sewer; septic applies primarily to unincorporated Bexar County and the surrounding Hill Country counties of Comal, Medina, Bandera, and Kendall. Critically, properties in the Edwards Aquifer Recharge Zone face strict additional oversight from the Edwards Aquifer Authority (EAA) — a separate state agency with authority to require enhanced treatment systems or deny permits to protect the aquifer. OSSF permit fees are $200–$400; EAA review adds time and potentially additional engineering requirements.