Septic in Round Mountain, TX

Round Mountain has that easygoing Hill Country vibe, with homes tucked along winding roads and yards that stretch out toward wide skies. In a place like this, most households rely on on-site wastewater treatment rather than a city sewer system, so your septic system is a normal, practical part of home ownership here.

Is septic common in Round Mountain? Should I expect septic if I own or buy a home?

Yes—septic systems are the norm for most Round Mountain homes. The area's rural layout, rolling land, and limited access to centralized sewer lines mean a well-maintained septic system is typically what a property uses to handle wastewater. If you're buying a home, you should indeed expect a septic system unless the property happens to be connected to a municipal sewer service. When you're evaluating a home, ask for the current septic permit and maintenance records, and plan to arrange a professional inspection if you're unsure about the system's condition.

Why homes typically use septic systems in Round Mountain

• Limited public sewer: The countryside setting and dispersed parcels make extending a city sewer line expensive and impractical, so most homes go with on-site systems.
• Lot size and soil: Many Round Mountain lots are deep enough to support a properly designed septic field, and the local soil generally accepts effluent well when properly engineered.
• Cost and practicality: On-site wastewater treatment avoids long service corridors and ongoing sewer charges, making septic systems a sensible choice for rural living.
• Environmental safeguards: When designed, installed, and maintained correctly, on-site systems protect groundwater and surface water while keeping neighborhoods healthy.

A high-level look at how septic works here

A typical home uses a tank that separates solids from liquids; the liquid effluent then leaches into a drain field. With proper maintenance, a well-functioning system treats wastewater on-site and minimizes odors, backups, and soggy spots. The key is routine care: periodic pumping, keeping harmful chemicals out of the system, and protecting the drain field from heavy machinery or dense landscaping over the absorption area.

Tips to keep your Round Mountain septic healthy (quick starts)

• Pump every 3–5 years (or per your system's recommendation) based on usage.
• Avoid pouring fats, oils, grease, and chemical solvents down the drain.
• Don't park or build on the drain field; keep the area vegetated but undisturbed.
• Have a local septic contractor inspect if you notice backups, gurgling, or soggy areas.
• Keep records of maintenance, inspections, and repairs for quick reference.

In the sections ahead, you'll find practical steps and local tips tailored to Round Mountain homes and the contractors who serve them.

Where Septic Systems Are Common in Round Mountain

Rural layouts and lot sizes

• Most Round Mountain homes sit on-acre-plus parcels outside city limits, where sewer lines aren't available. This makes on-site septic systems the standard method for handling household waste.
• Large lots reduce drainage conflicts and give room for a drainfield, which is essential for compliant, well-functioning systems.

Soil and site conditions that favor septic use

• The Hill Country area features limestone bedrock, shallow soils, and variable drainage. Many properties have soils that drain adequately, which supports conventional drainfields when properly designed.
• Properties near streams, floodplains, or perched groundwater require careful siting and, at times, alternative septic options to protect groundwater and surface water.
• Before design or installation, a soil assessment helps determine absorption capacity and appropriate setbacks from wells, foundations, and slopes.

Where you'll typically find septic on Round Mountain properties

• On single-family homes with private wells: most common arrangement is a conventional septic system (tank + absorption field).
• On properties with difficult soils or limited absorption area: alternative systems such as aerobic treatment units (ATUs), mound systems, or other advanced designs may be used to achieve proper effluent treatment and field performance.
• Near steeper slopes or rocky outcrops: drainfields are often placed on the gentler, well-drained portions of the lot, sometimes requiring careful grading or elevated drainfield designs.

Typical system types found in Round Mountain

• Conventional septic systems (tank and drainfield) for soils with good drainage and adequate depth to the absorption area.
• Alternative/advanced systems for challenging sites:
  • Aerobic treatment units (ATUs) with expanded or alternative drainfields.
  • Mound systems where natural soil absorption is limited or where seasonal water table or shallow soils constrain a conventional field.
• Small lot adjustments or upscaled residential needs may also drive specialty systems designed to handle higher wastewater loads or sensitive soils.

Maintenance patterns and regulatory context

• Regular maintenance is essential to keep any system functioning in Round Mountain's climate and soil conditions.
• Permitting and inspection: new or altered OSSF installations require Texas Commission on Environmental Quality (TCEQ) oversight. See official guidance at:
  • TCEQ On-Site Sewage Facility (OSSF) program: https://www.tceq.texas.gov/permitting/ossf
  • OSSF rules and regulations: https://www.tceq.texas.gov/permitting/ossf/regs
• Common maintenance recommendations:
  • Schedule pumping every 3–5 years for typical residential systems, or as advised by a licensed designer based on usage.
  • Use water efficiently to reduce loading on the drainfield.
  • Avoid placing heavy objects or vehicles on the drainfield area; plant shallow-rooted vegetation only.
• Emergency signs to watch for: persistent odors, surface wetness, lush green grass over the drain area, or toilets backing up. If you notice issues, contact a licensed OSSF professional promptly.

Quick-start steps for Round Mountain homeowners

1. Confirm soil suitability and lot constraints with a licensed OSSF designer or engineer.
2. Choose a system type aligned with soil conditions (conventional vs. ATU or mound) and long-term household needs.
3. Obtain appropriate permits and inspections through TCEQ Before installation or modification.
4. Implement a maintenance plan: schedule regular pumping, monitor the drainfield, and keep records for future property transactions.
5. Additional reference resources:
   • EPA septic system guidance: https://www.epa.gov/septic
   • General overview of on-site wastewater treatment and design considerations
6. Notes on local oversight: While broader standards come from state agencies, some Round Mountain residents also check with local environmental health offices for site-specific guidance and records. For the most current local requirements and recommendations, start with the TCEQ OSSF resources above.

Septic vs Sewer: What Homeowners in Round Mountain Should Know

How septic systems and municipal sewers work

• Septic system: Wastewater from a single home flows into a buried septic tank. Solids settle, grease floats, and liquid effluent drains to a soil absorption field where bacteria further treat it.
• Municipal sewer: Wastewater from multiple homes enters a public sewer system and is transported to a central treatment plant before being released or reused.

Costs and ongoing maintenance

• Septic system (owning): upfront installation, plus periodic pumping and inspection every 3–5 years depending on use, household size, and tank size.
• Municipal sewer: predictable monthly or quarterly service charges billed by the city or district; fewer direct hands-on maintenance needs but you still must maintain plumbing fixtures and drains.
• Long-term value: a well-maintained septic system can last 25–40 years with proper care; a failed system can be costly to repair and may require replacement of the drain field.

What Round Mountain homeowners should consider

• Soil and site conditions: Round Mountain soils, groundwater depth, and climate influence septic field design and performance.
• Sewer access: not all properties have nearby sewer lines; connection costs can be substantial and may require road or trench work.
• Water usage: high-efficiency fixtures and mindful watering help extend a septic field's life.

Practical maintenance tips

• Schedule regular inspections and tank pumping by a licensed professional.
• Conserve water: spread out laundry and dishwasher loads, fix leaks, and use high-efficiency fixtures.
• Protect the drain field: keep vehicles and heavy equipment off the area, avoid planting trees or shrubs with deep roots nearby, and manage drainage to prevent pooling.
• Use septic-friendly products: avoid harsh chemicals, solvents, and non-biodegradable cleaners that can disrupt beneficial bacteria.
• Keep a maintenance log: track pumping dates, professional visits, and any unusual odors or backups.

Pros and cons at a glance

• Septic system pros: independence from sewer mains, potentially lower monthly bills, long-term asset for rural homes.
• Septic system cons: requires regular maintenance, potential for costly failures if neglected, needs sufficient drain-field space and appropriate soils.
• Municipal sewer pros: no on-site maintenance, centralized treatment, fewer homeowner responsibilities.
• Municipal sewer cons: ongoing utility bills, potential for rate increases, dependence on public infrastructure and service reliability.

Steps homeowners can take now

1. Get a professional septic assessment if you're unsure about tank size, age, or drain-field condition.
2. Check whether Round Mountain properties have access to a municipal sewer line and estimate connection costs.
3. Create a simple maintenance schedule (pump every 3–5 years; inspect annually or as recommended).
4. Implement water-saving practices to reduce wastewater load.
5. If issues arise (gurgling drains, sewage odors, backups), contact a licensed septic professional promptly.

When to connect to sewer or replace a failing system

• Backups, wet areas in the drain field, strong odors, or new soggy spots indicate potential failure and should be evaluated urgently.
• Connection decisions depend on sewer availability, city plans, and the cost-benefit balance of repairs versus connecting to a sewer main.

Official resources:

• EPA on septic systems:
• Texas On-Site Sewage Facility (OSSF) program overview: https://www.tceq.texas.gov/permitting/ossf

Typical Septic System Types in Round Mountain

Conventional gravity septic systems

• Most common in Round Mountain when soils are suitable and the water table is deep enough.
• Components: a septic tank and a drainfield (drainfield trenches) connected by a distribution box.
• How it works: solids settle in the tank; liquids flow by gravity to perforated pipes in the trenches where soil and microbes treat the effluent.
• Pros: simple design, reliable, generally lower upfront cost.
• Cons: performance depends on soil depth, drainage, and groundwater; may fail in poorly drained or very shallow soils.
• Official guidance: For general septic guidance, see EPA's septic systems page [EPA septic systems](https://www.epa.gov/septic).

Pressure-dosed and pressure distribution systems

• Used when soils are uneven, or the site is sloped, so gravity alone won't evenly distribute effluent.
• Key features: a pump chamber, small-diameter laterals, and a control system that distributes effluent at low pressure.
• Pros: more uniform distribution, can extend life of the system in challenging soils.
• Cons: higher upfront cost; requires electricity and routine maintenance.
• Consider this option if your soil map or perc tests show variability or if the grade makes gravity distribution impractical.

Mound systems (raised beds)

• Appropriate when native soil is shallow, highly permeable to water, or the water table is close to the surface.
• How it's built: a sand-and-soil fill is built up above the natural ground with a dosing network that delivers effluent into the mound.
• Pros: expands usable lots, works with limited soil depth or poor natural absorption.
• Cons: more complex to install and maintain; needs monitoring of moisture and proper operation of the dosing system.
• Note: mound systems are a common solution in Texas when soil constraints exist.

Sand filter systems

• Serve as a secondary treatment stage when soil absorption is marginal or slow.
• Layout: effluent exits the septic tank and flows through a lined sand filtration bed before infiltrating the soil.
• Pros: improves effluent quality and provides additional treatment in challenging soils.
• Cons: ongoing maintenance to prevent clogging and ensure the sand remains in good condition.

Aerobic Treatment Units (ATUs)

• Mechanical/biological treatment units that aerate and treat wastewater more aggressively than conventional systems.
• Pros: high-quality effluent, suitable for smaller lots or soils that don't drain well; compact footprint.
• Cons: higher energy use and more frequent servicing; some models require odor management.
• Useful when space is tight or soil conditions limit conventional leach fields.

Drip/dispersal and alternative layouts

• Some properties use drip irrigation or spray dispersal for treated effluent as part of a comprehensive system.
• Pros: efficient use of wastewater for landscaping; can reduce trench length and preserve space.
• Cons: design must meet local code requirements; ongoing maintenance and monitoring are necessary.

How to decide the right type for Round Mountain homes (Steps)

1. Confirm local requirements with the Round Mountain area health authority and the Texas OSSF program.
2. Have soil and site conditions evaluated by a licensed designer (percolation rate, depth to groundwater, slope).
3. Consider lot size, future plans, and how you'll use the landscaping near the system.
4. Compare life-cycle costs, maintenance needs, and energy use.
5. Obtain design plans, warranties, and ensure installers are licensed and insured.
6. Official resources: EPA offers general septic guidance at [EPA septic systems](https://www.epa.gov/septic). For Texas-specific permitting and requirements, see the [TCEQ OSSF program](https://www.tceq.texas.gov/permitting/ossf).

Common Septic Issues in Round Mountain

Groundwater and Drainfield Flooding

In Round Mountain, soils can be shallow to bedrock and the water table can rise after heavy rains. When the drainfield sits in saturated soil, effluent can back up, causing slow drains, gurgling sounds, odor, and toilets that won't flush properly.

• Signs to watch for:
  • Wet or spongy spots over the drainfield
  • Backups after a period of heavy rain
  • Strong septic odors near the system
• Why Round Mountain's geology matters:
  • Limestone bedrock and compacted soils slow percolation
  • Seasonal fluctuations can push the drainfield toward saturation
• What to do:
  1. Conserve water to reduce load on the system
  2. Schedule a professional inspection to assess drainfield condition
  3. Consider a formal evaluation (percolation test or alternative design) if the site isn't suitable for a conventional system
• Official resources: EPA's septic overview and on-site wastewater guidance
  • https://www.epa.gov/septic
  • https://www.epa.gov/septic/about-septic-systems

Soil and Site Conditions in Round Mountain

Soil depth, composition, and drainage influence how well a drainfield works. In Round Mountain, the combination of shallow soils and rock can limit effluent movement, increasing the risk of failure if the system isn't properly designed for the site.

• Key factors:
  • Soil depth to rock or caliche
  • Permeability and drainage characteristics
  • Slope and setback considerations
• Practical steps:
  • Have a licensed installer perform a site evaluation before installation or repairs
  • Use soil-based design alternatives (such as mound systems) when appropriate
  • Regularly check for signs of surface pooling, surfacing effluent, or odors
• Official resources:
  • https://www.epa.gov/septic
  • https://www.tceq.texas.gov/permitting/ossf

Tree Roots and Landscaping Near the Drainfield

Trees and shrubs planted too close to the drainfield can send aggressive roots into the pipes, causing blockages or system failure. In rural Round Mountain lots, root intrusion is a common, preventable issue.

• How roots cause trouble:
  • Pipes crack or clog from encroaching roots
  • Reduced soil porosity around the leach field
• Prevention tips:
  • Maintain 10–15 feet of clearance between trees and the drainfield when possible
  • Use root barriers or redirect irrigation away from the area
  • Keep heavy equipment or deep soil disturbance away from the field
• Official resources:
  • EPA septic guidance for root intrusion awareness: https://www.epa.gov/septic

Aging Systems and Maintenance Gaps

Many Round Mountain homes have older OSSFs that were installed decades ago. As systems age, performance declines, and small issues can escalate into costly failures if not maintained.

• Warning signs:
  • Toilets and drains slow to drain
  • Backups or sewage odors indoors or in the yard
  • Drainfield sogginess or surfacing effluent
• Maintenance plan:
  • Pump the septic tank every 3–5 years (more often for high water use)
  • Schedule periodic inspections and drainfield testing
  • Keep records of all maintenance and repairs
• Official resources:
  • EPA septic maintenance tips: https://www.epa.gov/septic

Water Use and Household Drain Management

High household water usage, especially in older homes with large families or guests, stresses the septic system and drainfield, accelerating failure.

• Best practices:
  • Spread out laundry and dishwashing during the week
  • Use water-efficient fixtures and high-efficiency appliances
  • Avoid dumping large volumes of grease, coffee grounds, or dirty water down one sink
• Quick actions if you notice stress on the system:
  • Limit water use for 24–48 hours
  • Check for any leaks or running toilets
  • Contact a licensed septic professional for guidance
• Official resources:
  • EPA water-efficiency guidance and general septic tips: https://www.epa.gov/septic

What Not to Flush or Pour (Chemicals, Wipes, and More)

Flushing non-biodegradable items, chemicals, or grease can kill the beneficial bacteria in the tank and clog the drainfield.

• Items to avoid:
  • Flushable wipes (even those labeled flushable)
  • Paper towels, cotton balls, feminine hygiene products
  • Grease, solvents, paints, pesticides, or harsh cleaners
• Safer disposal approach:
  • Collect waste and dispose of it with regular trash, not the septic system
• Official resources:
  • EPA septic system care and maintenance: https://www.epa.gov/septic

Well Water and Groundwater Risk

A failed septic system can impact nearby groundwater and shallow wells. If you rely on well water, regular testing is crucial, and maintain proper setbacks between the septic system and the well.

• Actions to protect your well:
  • Test your well water at least annually and after signs of contamination
  • Ensure adequate setbacks between the septic system and the well
  • Have any suspicious water quality changes investigated promptly
• Official resources:
  • EPA groundwater protection guidance: https://www.epa.gov/ground-water-and-drinking-water

Note: Always consult a licensed septic professional and local authorities for design, installation, and maintenance guidance specific to your property. For Texas-specific regulations and permitting, you can refer to the Texas Commission on Environmental Quality (TCEQ) OSSF program:

• https://www.tceq.texas.gov/permitting/ossf

Septic Inspection, Permits & Local Oversight

Local regulatory landscape

In Round Mountain, OSSFs are regulated at the state and county level. The Burnet County Environmental Health Department handles OSSF permits, site inspections, and final approvals. The Texas Commission on Environmental Quality (TCEQ) sets statewide rules for OSSFs. If your property sits inside a city boundary, check with the municipality for any additional rules or permit requirements.

Permits you may need

• OSSF permit for a new installation or a major modification
• Permit for substantial repairs or replacement of tanks, lines, or the drain field
• Permit amendments if your project plans change after initial approval
• Some minor repairs may be exempt from a full permit, but verify with Burnet County Environmental Health

Local oversight contacts

• Burnet County Environmental Health Department: primary source for OSSF permits and inspections. Check the county's official site for the Environmental Health or OSSF page.
• Texas Commission on Environmental Quality (TCEQ) On-Site Sewage Facilities program:

Septic Maintenance for Homes in Round Mountain

Round Mountain-specific considerations

• The Round Mountain area often features shallow soils over limestone bedrock and rocky outcrops. This can limit effluent absorption and make systems more sensitive to overdosing or damage from heavy use.
• Tree roots from oaks, junipers, and mesquites are common culprits for intrusion into tanks, lids, and drain fields. Plan for regular root checks if your property has trees near the septic system.
• Homes on smaller lots or with compacted soils may have limited space for a robust drain field. Avoid parking on or over the absorption area and minimize soil disturbance in the drainage zone.
• Groundwater proximity and intense rainfall events can influence drainage performance. Round Mountain weather can swing quickly from drought to downpours, stressing OSSFs.

Regular inspection and pumping

• Schedule: have a licensed OSSF professional inspect your system every 1–2 years; pump the tank every 3–5 years as a baseline. In Round Mountain's soil and climate, more frequent pumping may be needed for households with heavy water use or older systems.
• What to expect in a service visit:
  1. Locate and uncover the access lids safely; note any surface settlement or odors.
  2. Open the tank and measure the depths of scum and sludge; verify the condition of baffles and inlet/outlet tees.
  3. If pumping is required, the pro will remove sludge and scum and return the tank to proper working order.
  4. Inspect the distribution box for settled or cracked components and confirm even distribution to laterals.
  5. Re-seat lids, restore soil, and document any recommended follow-up actions.
• Documentation: keep a simple maintenance log with pump dates, tank size, and any observed issues to help planning around irrigation loads and family changes.

Water usage and household habits

• Conserve water to ease load on the drain field:
  • Fix leaks promptly; install high-efficiency toilets, faucets, and appliances.
  • Run full loads in dishwashers and washing machines; stagger heavy water events (laundry, showering, irrigation).
  • Use temporary water-restricting measures during drought or well-water restrictions.
• What not to flush:
  • Do not flush wipes (even "flushable"), wipes, diapers, paper towels, grease, solvents, paints, pesticides, or medications. These items can disrupt bacteria, clog pipes, or kill beneficial organisms in the tank and drain field.
• Cleaning products:
  • Use septic-safe, low-chemical cleaners and avoid drain cleaners that can harm the microbial community essential for treatment.

Soil and drain-field care in Round Mountain

• Avoid soil compaction over the drain field. Do not drive or park vehicles on the absorption area, and leave a clear zone free of heavy equipment.
• Plant with care: choose shallow-rooted vegetation over the drain field to minimize root intrusion while avoiding plantings that require irrigation directly over the field.
• Surface water management: ensure drainage around the system slopes away from the drain field and that storm runoff does not pool on or around the absorption area.

After heavy rains or drought

• After heavy rain, limit nonessential water use until the soils regain capacity and the field has dried; saturated soils slow absorption and can lead to surface discharge.
• During droughts, conserve water to reduce drawdown on the system; avoid long, continuous irrigation that can overwhelm the drain field.
• If you notice foul odors, damp soil, or surfacing effluent after rain or drought, contact a licensed OSSF professional promptly.

Regulatory and maintenance resources

• Texas regulations and guidance for on-site sewage facilities (OSSF) come from the Texas Commission on Environmental Quality (TCEQ). Check current rules and local requirements.
• Official resources:
  • EPA Septic Systems: https://www.epa.gov/septic
  • TCEQ On-Site Sewage Facilities (OSSF) program: https://www.tceq.texas.gov/permitting/ossf
  • TCEQ OSSF forms and guidance: https://www.tceq.texas.gov/permitting/ossf/ossf-forms-guidance

Cost Expectations for Septic Services in Round Mountain

Septic Tank Pumping

• What it includes: accessing the tank, removing the accumulated solids, inspecting the baffles and lid seals, and checking overall system performance. Pumping is often paired with a quick status check of pumps, alarms, and risers to ensure easy future access.
• What's unique to Round Mountain: local soil and groundwater conditions can influence how often you pump and how often a professional checks the tank's integrity. In this area, routine pumping is commonly planned with a quick inspection of tank age and lid accessibility.
• Typical cost in Round Mountain: $275–$450.
• Steps to arrange:
  1. Call a licensed septic pro and describe tank size and age.
  2. Schedule convenient access and any required permitting reminders.
  3. Receive an estimate and confirm any needed follow-up services.

Septic System Inspection

• What it includes: visual inspection of the tank and drain field, assessment of effluent quality, check of pump chamber or electrical components if present, and sometimes a functional test of the alarm.
• What's unique to Round Mountain: inspections are especially valuable if you're buying or renting a home, given varying tank ages and field conditions in local soils.
• Typical cost in Round Mountain: $120–$300.
• Steps to arrange:
  1. Book a full system inspection or a pre-purchase inspection.
  2. Provide access to the tank and any available system records.
  3. Review the written report and follow recommended maintenance.

Septic System Installation (New System)

• What it includes: site evaluation, soil/percolation tests, design, permits, trenching or mound construction if required, tank installation, and initial start-up checks.
• What's unique to Round Mountain: soil depth, limestone and rocky layers can affect field design and project duration. Local permitting will typically require a soils test and inspection during installation.
• Typical cost in Round Mountain: $8,000–$25,000+ (dependent on tank size, field design, and permit scope).
• Steps to arrange:
  1. Have a licensed designer assess lot constraints.
  2. Obtain necessary permits and schedule installation window.
  3. Coordinate with the installer for inspection milestones and final approval.

Drain Field Repair or Replacement (Leach Field)

• What it includes: diagnosing failures (compaction, saturating soils, or lines backing up), repairing or replacing failed trenches, and rechecking system performance after work.
• What's unique to Round Mountain: uneven or shallow soils common in the Hill Country can drive field sizing or replacement approaches. Proper compaction avoidance and soil restoration are emphasized.
• Typical cost in Round Mountain: $6,000–$25,000.
• Steps to arrange:
  1. Have a field evaluation performed to confirm failure.
  2. Decide on repair vs. replacement strategy with pro guidance.
  3. Complete final inspections and permit follow-ups as required.

Septic System Repairs and Component Replacement

• What it includes: pump, float switches, check valves, lines, valve boxes, lids, or alarms. Small repairs may be quick fixes; larger ones may require part replacements or line rerouting.
• What's unique to Round Mountain: aging components are common as homes in the area age; repairs are often paired with a broader system check to prevent future headaches.
• Typical cost in Round Mountain: minor fixes $150–$1,000; major repairs $2,000–$6,000+ depending on scope.
• Steps to arrange:
  1. Identify faulty component and obtain a repair estimate.
  2. Schedule work to minimize disruption.
  3. Test the system after repair and update maintenance plan.

Tank Risers, Lids, and Accessibility Improvements

• What it includes: adding or raising tank access risers, weatherproof lids, and sometimes a small deck or safe walkway for regular access and inspections.
• What's unique to Round Mountain: improved accessibility helps with future pumping and inspections, especially given terrain and driveways in some neighborhoods.
• Typical cost in Round Mountain: $1,000–$2,000.
• Steps to arrange:
  1. Confirm tank depth and access points.
• Choose materials and safety features.
  1. Schedule installation and verify proper seal and ventilation.

Permits and Local Inspections

• What it includes: permit applications, plan reviews, and on-site inspections required by county or state authorities.
• What's unique to Round Mountain: permit costs and timelines can vary with county requirements; early coordination helps prevent delays.
• Typical cost in Round Mountain: $100–$400 (varies by project scope).
• Steps to arrange:
  1. Identify the project type needing a permit.
  2. Submit plans and pay applicable fees.
  3. Schedule inspections at key milestones.

Official resources:

• EPA Septic Systems: https://www.epa.gov/septic
• Texas Commission on Environmental Quality (TCEQ) On-Site Wastewater information: https://www.tceq.texas.gov/ (search for "onsite wastewater" within the site)