Frequently Asked Questions About Septic Systems

Pumping and Maintenance

How often should I pump my septic tank?

Most Bexar County households should pump every 3-5 years. The right interval depends on:

• Tank size: Smaller tanks (750-1,000 gallons) fill faster than larger ones (1,250-1,500 gallons)
• Household size: More people generate more waste
• Water usage habits: High-efficiency fixtures extend intervals; water-wasting habits shorten them
• Garbage disposal use: Disposals add significant solids, potentially halving the interval
• System age: Older systems may need more frequent attention

A professional can measure sludge and scum depths during service and recommend your optimal schedule.

What happens if I don't pump my septic tank?

Neglecting pumping allows solids to build up until they overflow into the drain field. Once solids clog drain field soil, you face expensive repairs or complete replacement—typically $5,000-$15,000 or more. Regular pumping at $350-$500 every few years prevents thousands in emergency repairs.

How do I find my septic tank?

Start with these approaches:

• County records: Bexar County Development Services may have permit records showing tank location
• Previous inspection reports: If the home changed hands, inspection documents may exist
• Visible clues: Look for slight mounds, depressions, or patches of grass that stay greener (or browner) than surrounding lawn
• Probing: A professional can probe the yard to locate the buried tank

If you can't find records, we locate tanks using electronic detection equipment and probing during service calls.

What shouldn't go into a septic system?

Avoid putting these into your drains:

• Grease, oils, and fats — Coat pipes and float in the tank, disrupting treatment
• "Flushable" wipes — They don't break down like toilet paper
• Feminine hygiene products and diapers — Won't decompose
• Harsh chemicals — Kill beneficial bacteria that break down waste
• Medications — Pass through treatment and contaminate groundwater
• Excessive bleach or drain cleaners — Damage bacterial populations
• Paints, solvents, and chemicals — Belong at hazardous waste collection, not your septic

Do septic tank additives work?

Most additives are unnecessary. A healthy septic system contains all the bacteria it needs. Some additives can actually harm your system by disrupting the natural bacterial balance or emulsifying solids so they flow to the drain field.

Save your money on additives and invest in regular pumping instead.

Costs and Pricing

How much does septic pumping cost in San Antonio?

Residential septic pumping in Bexar County typically ranges from $350-$500 depending on:

• Tank size and accessibility
• Current solids depth
• Whether the lid needs excavation
• Distance from service areas

We provide pricing before beginning work.

What does a new septic system cost?

System costs vary significantly based on type and site conditions:

• Conventional anaerobic systems: $8,000-$15,000
• Aerobic treatment units: $15,000-$25,000
• Drip irrigation systems: $20,000-$35,000

Challenging soil conditions, rocky terrain, and small lots push costs toward the higher end. Site evaluation determines which system types are viable for your property.

Does homeowners insurance cover septic repairs?

Standard homeowners policies typically exclude septic system coverage unless failure results from a covered peril (like damage from a fallen tree). Some policies offer septic coverage as an add-on. Check with your insurer about your specific coverage.

Is septic cheaper than sewer?

Initially, septic avoids sewer tap fees and monthly bills. Over time, maintenance costs accumulate. Properties near sewer lines may find connection worthwhile; rural properties far from infrastructure typically find septic more economical. We can discuss the tradeoffs for your specific situation.

Signs of Problems

How do I know if my septic system is failing?

Warning signs include:

• Slow drains throughout the house (not just one fixture)
• Gurgling sounds in plumbing when toilets flush
• Sewage odors indoors or in the yard near the system
• Standing water or wet spots over the drain field
• Unusually lush grass over the drain field (effluent fertilizes from below)
• Sewage backing up into basement or lowest-level drains

Don't ignore these signs. Early intervention costs less than emergency repairs after complete failure.

Why does my yard smell like sewage?

Several causes are possible:

• Full tank: The most common cause—schedule pumping
• Drain field failure: Effluent surfacing rather than absorbing
• Vent pipe issues: Problems with plumbing vents can create odors
• Improper grading: Surface water pooling over system components

A professional evaluation identifies the source and appropriate solution.

What causes a septic system to fail?

Common failure causes:

• Pumping neglect: Solids overflow to drain field
• Excessive water use: Hydraulic overloading beyond design capacity
• Flushing non-degradables: Wipes, diapers, and trash clog systems
• Grease accumulation: Coats pipes and drain field soil
• Tree roots: Infiltrate and block lines
• Driving over components: Crushes pipes and compacts soil
• Old age: Systems have finite lifespans even with good care

Regulations and Requirements

Do I need a permit to repair my septic system?

Minor repairs (like replacing a pump or baffle) generally don't require permits. Major repairs, system modifications, and any work affecting the drain field typically require Bexar County permits. When in doubt, ask—unpermitted work can create problems when selling the property.

What's required for septic in the Edwards Aquifer zone?

Properties in the Edwards Aquifer recharge and contributing zones face stricter requirements:

• Aerobic treatment is usually required (conventional systems often prohibited)
• Maintenance contracts are mandatory for ATU systems
• Effluent testing may be required to verify treatment performance
• Enhanced setbacks from wells and recharge features

Our team handles compliance for installations in sensitive zones.

How long does septic permit approval take?

Bexar County permit review typically takes 2-4 weeks for straightforward applications. Complex sites, Edwards Aquifer zone properties, and applications requiring revisions take longer. We prepare thorough applications to minimize delays.

System Types

What's the difference between aerobic and conventional septic?

Conventional (anaerobic) systems use bacteria that work without oxygen. Waste settles in the tank, then partially-treated effluent flows to a drain field for soil absorption. Simpler and cheaper, but requires good soil conditions.

Aerobic systems inject air, supporting oxygen-dependent bacteria that produce cleaner effluent. Required for challenging sites and sensitive areas. More expensive to install and maintain, but work where conventional systems can't.

How do I know what type of septic system I have?

Clues include:

• Control panel or alarm: Indicates an aerobic system
• Spray heads in the yard: Surface application means aerobic treatment
• Pump/blower noise: Aerobic systems have audible equipment
• Maintenance contract: Required for aerobic systems

If uncertain, we can inspect and document your system type.

Can I convert from aerobic to conventional?

Rarely. If your property required aerobic treatment due to soil conditions or regulations, those requirements still apply. In rare cases where aerobic was chosen voluntarily and soil conditions would support conventional, conversion might be possible—but the cost often exceeds the savings.

Real Estate Transactions

Do I need a septic inspection when buying a home?

You should. Septic systems can cost $15,000-$35,000 to replace. An inspection before purchase identifies problems the seller should address or disclose. Many lenders require inspection documentation.

What does a septic inspection include?

Our inspections include:

• Locating and exposing the tank
• Pumping the tank completely
• Inspecting tank structure, baffles, and components
• Evaluating drain field condition (visual inspection)
• Testing aerobic system components (if applicable)
• Written report documenting findings

Who pays for septic inspection—buyer or seller?

This is negotiable. Buyers often pay for initial inspection to inform their purchase decision. If problems are found, sellers may pay for repairs or provide credits. Sellers sometimes provide pre-listing inspections to demonstrate system condition.

Service Questions

How long does septic pumping take?

Most residential pumping appointments complete in 1-2 hours including travel, setup, pumping, inspection, and documentation. Deep cleaning or problem systems take longer.

Do I need to be home during septic service?

Not necessarily. We need access to the tank location (gates unlocked, etc.) and information about access lid location if it's not obvious. You can leave instructions and we'll document our service.

How far in advance should I schedule service?

Routine pumping: 1-2 weeks lead time typically gets a convenient appointment. Urgent issues: We accommodate problems as quickly as possible. Real estate inspections: Schedule early in your inspection period to allow time for any needed follow-up.

Contact Us

Have a question not answered here? Contact us directly—we're happy to discuss your specific situation and provide guidance.