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Septic & well regulations in Mills County, TX
Mills County is located in the Central Texas region of Texas. Cross Timbers and Edwards Plateau transition with sandy loam, clay, and limestone outcrops. Colorado River along the western boundary. Understanding local permit requirements and soil conditions is essential before installing, repairing, or inspecting a septic system.
Permits & Requirements
New Installation
TCEQ OSSF permit required under 30 TAC Chapter 285. Site evaluation required. Permit application submitted to TCEQ Region 9 Waco office. Properties 10 acres or larger with a single-family dwelling may qualify for the 10-acre exemption.
Repair
Emergency repairs may proceed without prior permit but must be reported to TCEQ within 72 hours. Non-emergency repairs require a permit from TCEQ Region 9.
Inspection
Aerobic systems require inspections 3 times per year by a licensed Maintenance Provider. A 2-year initial maintenance contract is mandatory for all new aerobic installations.
Mills County Environmental Health
TCEQ Region 9 - Waco Office
Contact the county environmental health department for permit applications, soil evaluation scheduling, and regulatory questions.
Soil & Terrain Characteristics
Cross Timbers and Edwards Plateau transition with sandy loam, clay, and limestone outcrops. Colorado River along the western boundary. Mixed soil types with varying permeability.
County-Specific Considerations
Mills County is served by TCEQ Region 9 Waco office for OSSF permitting. Goldthwaite is the county seat. Rural ranching county. Wells draw from the Trinity and Edwards-Trinity aquifer systems.
Find Services in Mills County
Septic Pumping
Mills County
Septic Inspection
Mills County
Septic Installation
Mills County
Well Water Testing
Mills County
Well Pump Repair
Mills County
Well Drilling
Mills County
Emergency Services
Mills County
Water Treatment
Mills County
Drain Field Repair
Mills County
Septic to Sewer Conversion
Mills County
Aerobic Septic System
Mills County
Well Water Filtration
Mills County
PFAS Water Testing
Mills County
Related Resources
Septic Permits & Regulations in Mills County — FAQ
How much does a septic permit cost in Mills County, TX?
- Septic permit fees in Mills County vary by permit type. New installation permits typically cost $200–$500, while repair permits are usually $100–$300. Contact TCEQ Region 9 - Waco Office at (254) 751-0335 for current fee schedules.
How long does it take to get a septic permit in Mills County?
- The septic permit process in Mills County generally takes 2–6 weeks, depending on soil evaluation scheduling and application completeness. Soil evaluations must be performed by a licensed soil scientist before applying.
Do I need a soil evaluation for a septic permit in Mills County?
- Yes. Mills County requires a professional soil evaluation before issuing any septic permit. A licensed soil scientist evaluates soil type, depth, drainage, and water table levels to determine the appropriate septic system design.
Who handles septic inspections in Mills County, TX?
- TCEQ Region 9 - Waco Office oversees all septic system inspections in Mills County. Contact them at (254) 751-0335 to schedule an inspection or ask about requirements.
Can I install my own septic system in Mills County?
- Mills County requires septic system installation by licensed contractors. All installations must be permitted through TCEQ Region 9 - Waco Office and pass inspection before the system can be used.
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