McMullen County, TX septic permits and regulations

Septic systems in McMullen County, Texas are permitted by TCEQ Region 16 - Laredo under 30 TAC Chapter 285.

Septic permit program

  • Program type: Own Program
  • Authorized agent: McMullen County / TCEQ Region
  • Own septic program: No, uses Texas state rules
  • Local rules beyond the state: No
  • Population: 600

Permit fee comparison

Average septic permit fee in McMullen County: $285. Texas average: $285.

Local rules

No online OSSF regulation documents found. County has authorized agent status but does not appear to publish permits, fee schedules, or ordinances online. Contact county directly for application materials.

What SepticPro has on file for McMullen County

  • 1 permit fee with sources
  • The agency phone, email and office address
  • Setback distances
  • Soil and perc test requirements
  • Allowed system types
  • System design rules
  • Inspection requirements
  • Maintenance and pumping rules
  • Point-of-sale rules
  • Installer, designer and pumper licensing

Create a free account to see the full details.

Draw a permit-ready site plan for McMullen County

Enter the address, draw the system on the aerial with the parcel lines and topo, and print it to scale for TCEQ Region 16 - Laredo. See how SepticPro site plans work.

Other Texas counties

Data checked 2026-03-16. Always confirm requirements with TCEQ Region 16 - Laredo before applying.