Septic in Lee County, MS

Last updated: Mar 21, 2026

Lee County greets you with a mix of Tupelo's hometown character and the practical realities of everyday homeownership. From tree-lined streets near the heart of town to quiet country lanes on the county's outskirts, many homes rely on a septic system to manage wastewater quietly and reliably. It's a familiar sight here, tucked behind yards and driveways, doing its job without fanfare.

Is septic common in Lee County? Yes, especially outside the core city sewer districts. If you own or are buying a home in rural areas or in older neighborhoods that haven't yet been tied into a municipal system, you'll likely find a septic tank or a drainfield in use. Homes inside newer subdivisions or closer to town may connect to city sewer, but septic remains the default arrangement for a large portion of the county's homes.

Why do Lee County homes typically use septic systems? Here are the practical drivers you'll hear about from neighbors and contractors alike:

  • Development patterns: Many parcels are spread out, with ample yard space and long driveways, making on-site systems a cost-effective and straightforward solution.
  • Infrastructure reach: Extending centralized sewer across large rural areas is expensive and logistically challenging, so septic systems were built to serve homes where sewer lines don't reach.
  • Soil and groundwater realities: Local soil types and water tables influence where a sewer main would be practical or permitted, reinforcing septic as a sensible option in many places.
  • Local timing: For decades, septic was the standard method of waste management in sections of the county that developed ahead of major sewer expansions.

County growth history and its impact on septic coverage: Lee County's growth has been centered around Tupelo, with waves of residential development moving outward from the city core. As the population expanded, sewer lines followed some growth corridors, but many rural and semi-rural areas remained outside the reach of centralized systems. That pattern created a landscape where septic is still necessary for many homes, while pockets near newer subdivisions or utility upgrades may be tied into sewer. The result is a county where septic is a familiar, long-standing part of home upkeep, coexisting with areas that have relied on municipal systems for years.

In short, septic exists here because it's a practical fit for the land, the layout of neighborhoods, and the pace of growth that has shaped Lee County over the decades. As you explore homes and properties, you'll find straightforward guidance and trustworthy tips right here to help keep your septic running smoothly.

How Septic Is Regulated in Lee County

State oversight and design standards

  • Mississippi sets the rules for onsite wastewater systems through the Mississippi Department of Environmental Quality (MDEQ). MDEQ establishes design standards, permitting requirements, and inspection expectations to protect public health and the environment.
  • The state regulates system types, performance criteria, setbacks (distance from wells, waterbodies, property lines), and required materials. Typical systems include conventional septic tanks with drainfields, as well as mound or other alternative technologies when site conditions demand it.
  • Certification and licensing requirements help ensure installers and designers meet minimum qualifications. In practice, many Lee County installations follow state rules and are reviewed by state or local authorities as part of the permitting process.
  • For a broad view of rules and program details, see the MDEQ's Onsite Wastewater program:

Local permit process in Lee County

  • Step 1: Confirm local intake points. Lee County generally follows state onsite wastewater regulations, but you'll need to start with whichever local office handles permits, inspections, and plan reviews for septic systems in the county.
  • Step 2: Hire a licensed professional. Work with a licensed onsite wastewater designer/installer (and, if required, a licensed operator) to prepare a compliant site evaluation, design, and installation plan.
  • Step 3: Submit plans and soil data. Your designer or installer submits the site evaluation, soil characterization, and system design to the appropriate authority for review. The review ensures your plan meets setback, drainfield requirements, and material standards.
  • Step 4: Obtain a permit. Once the plan is approved, obtain the septic permit. This permit authorizes installation and sets inspection milestones.
  • Step 5: Schedule inspections during installation. Inspections typically occur at key milestones: tank placement, piping trenching, backfilling, drainfield installation, and final connection. Passing inspections is required before the system can be placed into service.
  • Step 6: Final approval and documentation. After successful inspections, you receive final approval, and the system becomes operational. Keep all permit paperwork and maintenance records for your property file.

Design, installation, and maintenance requirements

  • System design must reflect soil conditions, groundwater considerations, and anticipated usage. This helps prevent failures and protects water quality.
  • Materials and installation methods must meet state standards. Improper installations can lead to early failure, odors, or environmental impacts.
  • Access and setback considerations are enforced to protect drinking water wells, surface water, and neighboring properties.
  • Proper pumping and maintenance are essential. Regular pumping (as recommended by your installer) helps prevent solids buildup and protects the drainfield.
  • Replacement and upgrades follow same regulatory framework. If your system reaches end-of-life or fails performance criteria, replacement must meet current standards.

Homeowner responsibilities and best practices

  • Schedule routine maintenance with a qualified service provider. Follow the recommended pumping frequency and keep service records.
  • Conserve water to reduce system load. Use high-efficiency fixtures, fix leaks, and spread out heavy-use activities.
  • Protect the drainfield. Avoid parking or driving on the drainfield, and do not plant trees with deep roots over the system.
  • Be aware of what goes into the system. Do not flush wipes, chemicals, solvents, or non-biodegradable items that can disrupt treatment or clog the drainfield.
  • Report issues promptly. If you notice sewage odors, damp patches, or surfacing effluent, contact the appropriate local authority or your service provider.

Helpful resources

  • Mississippi Department of Environmental Quality (MDEQ) – Onsite Wastewater program:

Quick reference: what to have ready when planning a septic project

  • A current site evaluation or soil assessment (percolation tests) if required.
  • A proposed design prepared by a licensed onsite wastewater designer/installer.
  • A list of anticipated wastewater flows (household size, fixtures, appliances).
  • Contact information for the Lee County health or building department to confirm local filing requirements.

Soil, Groundwater & Environmental Factors in Lee County

Soil Characteristics and Permeability

  • Soils across Lee County influence how well a septic system treats and disperses effluent. Drainage and texture determine system performance.
  • Key patterns to expect:
    • Well-drained sandy or loamy soils often support standard drain fields.
    • Heavy clay or shallow soils can slow treatment and may require alternative designs.
  • How to assess:

Typical Septic System Types in Lee County

Conventional septic system

  • What it is: A gravity-fed setup with a septic tank and a soil absorption field (drainfield) that treats wastewater in the soil.
  • When it's used: Most homes in Lee County with adequate soil depth and drainage.
  • Pros:
    • Simple, time-tested design
    • Generally lower upfront and maintenance costs
  • Considerations:
    • Requires enough good soil depth to the groundwater or bedrock
    • Needs regular pumping (often every 3–5 years depending on use)
    • Protect the drainfield from heavy traffic, trees, and solid waste disposal
  • Quick care tips:
    • Don't run water-rich loads simultaneously
    • Use water-saving fixtures
    • Schedule professional inspections if you notice slow drains or gurgling

Chamber or gravelless systems

  • What it is: A gravel-free alternative that uses modular plastic chambers to create the drainage area.
  • When it's used: When space is limited or soil conditions aren't ideal for conventional trenching.
  • Pros:
    • Easier installation and sometimes lower cost than traditional gravel beds
    • Flexible layouts for challenging sites
  • Considerations:
    • Still needs proper design and soil evaluation
    • Regular maintenance and pumping of the tank remain important
  • Quick care tips:
    • Avoid compaction above the chamber area
    • Keep vehicles and heavy equipment off the drainfield zone

Mound system

  • What it is: An elevated sand-and-soil structure built above the native soil to provide adequate treatment area.
  • When it's used: On sites with shallow topsoil, high groundwater, or poor native soils.
  • Pros:
    • Expands usable area for drainage where conventional systems won't work
    • Effective in challenging soil and moisture conditions
  • Considerations:
    • More complex and typically higher installation costs
    • Requires careful grading, access, and maintenance
  • Quick care tips:
    • Keep the raised mound protected fromRoots and heavy loads
    • Have periodic inspections of the root zone for root intrusion

Sand filter system

  • What it is: Secondary treatment that uses a subsurface sand filtration bed after the septic tank effluent.
  • When it's used: For marginal soils or when a higher level of treatment is desired before the drainfield.
  • Pros:
    • Improves effluent quality and system reliability on tougher soils
  • Considerations:
    • Still requires space and proper design
    • Needs regular maintenance and monitoring
  • Quick care tips:
    • Avoid flushing inappropriate materials
    • Schedule routine assessments by a licensed professional

Aerobic Treatment Unit (ATU) with drainfield or spray irrigation

  • What it is: A small, actively aerated treatment unit that produces a higher-quality effluent sent to a drainfield or sprayed onto landscape areas.
  • When it's used: On sites with limited soil absorption or where higher effluent quality is beneficial.
  • Pros:
    • Higher treatment efficiency in challenging soils
    • Flexible options for the final disposal method
  • Considerations:
    • Higher energy use and ongoing maintenance
    • Requires regular servicing by a qualified technician
  • Quick care tips:
    • Keep cover records and maintenance visits in check
    • Protect the spray area from foot traffic and pets

Low-Pressure Dosed (LPD) or pressure-dosed drainfields

  • What it is: A distribution method that uses small pumps to evenly distribute effluent into the trench, improving infiltration in less permeable soils.
  • When it's used: In sites with marginal absorption where gravity alone won't perform reliably.
  • Pros:
    • More uniform distribution, can extend life of the drainfield
  • Considerations:
    • Requires electricity and components to function correctly
    • Needs regular checks to prevent clogging or pump failure
  • Quick care tips:
    • Inspect and service pumps and controls regularly
    • Keep sump and pump basins clear of debris

Official resources to help you evaluate options:

If you're unsure which type fits your property, a licensed onsite wastewater professional can perform soil tests and design a system aligned with Lee County conditions and local regulations.

Typical Septic Issues Across Lee County

Common triggers in Lee County homes

  • Overloading the system with water: long showers, multiple laundry loads, and running appliances back-to-back can push more wastewater into the drain field than it can treat.
  • Infrequent pumping: older tanks or larger households may need pumping every 3–5 years; neglect accelerates field failure.
  • Flushing the wrong things: wipes, coffee grounds, fats/oils, medicines, and harsh chemicals kill bacteria or clog pipes, leading to backups.

Signs your system is having trouble

  • Slow drains and gurgling sounds in plumbing.
  • Sewage odors near toilets, sinks, or the drain field; damp or soggy patches on the yard above the drain field.
  • Unusually lush grass or plants over a specific area, often indicating effluent being distributed where it shouldn't.

Soil, site, and root considerations

  • Clay soils and high water tables common in parts of Lee County can slow drainage and stress the leach field.
  • Tree roots can intrude into septic pipes or the tank, especially in older installations, causing backups or leaks.

How rainfall and groundwater affect performance

  • Heavy rainfall can saturate the drain field, reducing its ability to absorb and treat effluent.
  • After storms or during wet seasons, the system is more vulnerable; cut back on water use and avoid unnecessary irrigation over the drain field.

Routine maintenance that matters

  • Pumping schedule: base it on tank size and household usage; regular pumping helps prevent backups.
  • System inspections: have baffles and tank components checked; ensure access lids are safe and intact.
  • Product choices: use septic-safe cleaners and avoid chemical drain cleaners that disrupt beneficial bacteria.

Simple troubleshooting steps

  1. Observe symptoms: note odors, slow drains, or wet areas in the Yard.
  2. Temporarily reduce water use: avoid simultaneous heavy loads and stagger laundry or dishwashing.
  3. Inspect for obvious blockages and minimize flushing of non-biodegradables.
  4. If issues persist, contact a licensed septic contractor for a professional diagnosis.

When to call a licensed professional

  • Effluent is surfacing on the property or there are strong sewer odors indoors or outdoors.
  • Drains remain slow despite reducing use and have not been pumped within the recommended interval.
  • You suspect a broken pipe, buried tank, or leach-field failure that requires specialized equipment.

Official resources

  • EPA septic systems:

Septic Inspection, Permits & Local Oversight

Who oversees septic permits in Lee County, MS

  • Mississippi regulates on-site wastewater systems through state and local authorities. The Mississippi Department of Environmental Quality (MDEQ) sets state standards and maintains the statewide On-Site Wastewater Program, while Lee County handles local permit issuance and inspections in many cases.
  • In Lee County, you'll typically work with the local health department or county permitting office for plan reviews, permits, and field inspections, all under state guidelines.

When you need a permit

  • New septic system installation on a lot.
  • Replacement of an existing septic system (tank, drainfield, or components).
  • Major repairs or alterations that change system capacity, layout, or setbacks.
  • Substantial property changes (adding square footage, finishing a basement that increases wastewater load, etc.).
  • Changes to property lines, land development, or new construction that could affect drainage or setbacks.

How to apply for a permit (step-by-step)

  1. Contact the local permitting office (Lee County Health Department or county building/planning office) to confirm exact requirements.
  2. Hire a licensed septic designer/installer to prepare plans and a site evaluation if required.
  3. Gather required documents: site plan, system design, soil evaluation or percolation test results (if applicable), property description, and any existing utility or well locations.
  4. Submit the permit application and plans to the appropriate local office and pay the permit fee.
  5. Receive plan review feedback and address any noted conditions before final approval.

Inspection process (what to expect)

  • Pre-installation evaluation: reviewer checks lot suitability, setbacks from wells and watercourses, and accessibility for inspection.
  • During installation inspections: staged checks as the tank is placed, baffles and risers installed, drainfield trenches or beds excavated, backfill done, and distribution piping laid.
  • Final inspection: verifies system functionality, as-built details, and compliance with plans.
  • If issues arise: you'll receive a correction notice and scheduling for re-inspection after fixes.

What inspectors typically look for

  • Correct tank sizing, material quality, and watertight seals.
  • Proper placement and orientation of tanks, risers, and lids.
  • Drainfield setup: trench/bed layout, soil absorption capacity, correct gravel/monitoring placement if required.
  • Correct piping slopes, cleanouts, and distribution devices.
  • Safe setbacks from wells, streams, property lines, and structures.

Documentation to keep handy

  • Property deed or parcel ID and a simple site sketch.
  • Permit numbers, plan sets, and any amendments.
  • Installer license number and company information.
  • Soil evaluation/percolation test results and the designer's report.
  • Inspection reports and any correction notices filed with the permitting office.

Fees, timelines, and planning tips

  • Permit and inspection fees vary by project size and jurisdiction; check with the local office for current rates.
  • Plan review and inspection timelines can take a few weeks to a couple of months, depending on workload and completeness of submittals.
  • Start early to align septic work with closing dates, major remodels, or new construction schedules.
  • Do not begin excavating or installing components without an active permit.

Compliance reminders for homeowners

  • Never dig, install, or modify an OWTS without the proper permit and approved plans.
  • Maintain clear access to the system for future inspections and pump-outs.
  • If you sell the property, be prepared to disclose septic system status and any permits or corrective actions.

Resources

  • Mississippi Department of Environmental Quality (MDEQ) – On-Site Wastewater Program:
  • For local guidance, contact Lee County Health Department or the county permitting office to confirm current Lee County procedures and fees.

Cost Expectations for Septic Services in Lee County

Septic Tank Pumping and Cleaning

  • What this includes: removing solids and scum from the tank, cleaning baffles if accessible, inspecting lids and risers, and providing a written assessment. Most Lee County homes with standard 1,000–1,250 gallon tanks fall into this category; larger tanks or hard-to-reach tanks may require more time.
  • Lee County specifics: many older homes and rural properties rely on traditional tanks, so access and tank size heavily influence price. Weather and yard obstacles can also affect costs.
  • Typical cost: $150–$350 for a standard pump-out; $350–$600 for larger tanks or if a camera inspection is bundled.
  • What affects price: tank size, accessibility, depth of lid, presence of a pump chamber, need for dye testing.
  • Steps to expect:
    1. Schedule with a licensed contractor.
    2. Clear access to the tank lid and safe entry path.
    3. Pump, inspect, and note any immediate repairs.
    4. Receive a written report with recommendations.

Septic System Inspection and Certification

  • What this includes: visual inspection of the tank, baffles, and pump chamber (if present); evaluation of the drain field and soil absorption area; measurement of sludge and scum layers; may include dye testing and a formal certificate.
  • Lee County specifics: real estate transactions are common triggers for inspections; some sales require documentation of permit history and prior maintenance.
  • Typical cost: $150–$300 for a basic inspection; $300–$500 for a full diagnostic or real estate transfer inspection (dye tests can add $50–$100).
  • What affects price: depth of inspection, whether a dye test is performed, and whether a written certification is required for the sale.
  • Steps to expect:
    1. Request inspection and any needed certifications.
    2. On-site evaluation with written findings.
    3. Delivery of the certification and any repair recommendations.

Drain Field Repair and Replacement

  • What this includes: diagnosing failure causes (saturated or failed absorption area), repairing or replacing components, and potentially re-siting or expanding the field.
  • Lee County specifics: soils and drainage patterns influence whether traditional drain fields suffice or if alternative designs (e.g., mound or raised beds) are needed.
  • Typical cost: Repair $1,000–$4,000; Replacement $5,000–$15,000; Complex setups (mounds/alternatives) can run $15,000–$40,000+.
  • What affects price: field size, soil conditions, required trenching or grading, required permits.
  • Steps to expect:
    1. Soil and field assessment.
    2. Design of repair or replacement plan.
    3. installation and field testing.
    4. Follow-up evaluation.

Septic System Installation (New System)

  • What this includes: site assessment, soil tests, system design, permitting, installation of tank and drain field (or mound/alt design), backfill, and final inspection.
  • Lee County specifics: many properties require soil-based design decisions; some sites need mound systems due to clay-heavy soils or high water tables.
  • Typical cost: standard system $6,000–$15,000; mound/advanced designs $15,000–$40,000+.
  • What affects price: lot size, soil tests, design complexity, permit fees.
  • Steps to expect:
    1. Hire designer and obtain plans.
    2. Secure DEQ/local permits.
    3. Install and certify the system.

Mound System Installation

  • What this includes: raised-bed drainage with engineered fill, venting, and carefully staged construction to accommodate challenging soils.
  • Lee County specifics: common where native soils limit percolation or water tables are elevated.
  • Typical cost: $15,000–$40,000+ depending on site constraints and system size.
  • Steps to expect:
    1. Comprehensive soil analysis.
    2. System design and permit approval.
    3. Construction and performance testing.

Septic Tank Replacement

  • What this includes: removal of an existing tank, installation of a new tank, reconnected lines, and system testing.
  • Typical cost: $3,000–$8,000 depending on tank size and materials.

Emergency or Backup Septic Services

  • What this includes: rapid response to backups, clogs, or alarms; may involve pumping and temporary mitigation.
  • Typical cost: $200–$500 plus any required repairs or replacement parts.

Grease Trap Pumping and Commercial Septic Services

  • What this includes: pumping, cleaning, and maintenance for larger kitchen traps or commercial setups that tie into a septic system.
  • Typical cost: $150–$350, with higher prices for larger commercial installations.

Official resources

  • Mississippi Department of Environmental Quality – Onsite Wastewater Program:
  • U.S. Environmental Protection Agency – Septic Systems: https://www.epa.gov/septic

Cities & Communities in Lee County With Septic Systems

Tupelo & Nearby Rural Areas

Tupelo provides municipal sewer within city limits, but septic systems are still common outside the urban boundary. If your property sits beyond Tupelo's sewer service area, you'll likely be on a septic system or a private wastewater setup. Knowing your status helps with proper maintenance, code checks, and any upcoming hookups.

  • Shannon (unincorporated area just southwest of Tupelo)
  • Mooreville (town near the western edge of the county)
  • Belden (northwest of Tupelo)
  • Plantersville (east of Tupelo)
  • Saltillo (northeast of Tupelo)

How to Confirm Your System Type

Use these steps to verify whether your property uses septic or municipal sewer.

  1. Check your property records: look for septic permit history or wastewater-related notes in the deed or tax records.
  2. Call local authorities: contact the Lee County Health Department or the Mississippi Department of Health to confirm the wastewater service status for your exact address.
  3. Inspect available maps: review utility or city/county maps for sewer line locations and service areas.
  4. If in doubt, hire a licensed septic inspector: a professional can determine system condition and whether a tie-in to sewer is feasible or required.

Septic System Maintenance Best Practices

Keep septic systems in Lee County working well with simple, proactive care.

  • Pump on a schedule: most homes should be evaluated and pumped every 3–5 years, depending on usage and tank size.
  • Conserve water: use efficient fixtures and spread out laundry and heavy water use to reduce load on the system.
  • Protect the drainfield: keep heavy equipment off the drainfield area, avoid planting trees or shrubs with deep roots nearby, and don't drive or park on the drainfield.
  • Mind what you flush: only human waste and toilet paper should go into the septic; avoid flushable wipes, grease, pesticides, and harsh chemicals.
  • Routine inspections: have a professional inspect the system after major repairs, if you notice backups, or if you've recently had high rainfall events.

Common Lee County Septic Issues and Quick Fixes

  • Slow drains or backups: check for household clogs first, then evaluate the septic tank for proper pumping intervals.
  • Strong drain odors: may indicate a venting problem or a need for pumped solids; schedule an inspection.
  • Wet zones or standing water in the yard: could signal a failing drainfield or excessive water load; limit irrigation and contact a pro promptly.

-FFF- pumping history gaps: ensure you have a documented maintenance history for future sale or verification.

Planning for Sewer Expansion or Connections

If your area is considering sewer expansion or a tie-in program, these steps help you prepare.

  1. Stay informed: monitor announcements from the City of Tupelo and Lee County health or planning offices for expansion timelines and required inspections.
  2. Budget for a potential tie-in: sewer connections can involve permits, trench work, and potential impact fees.
  3. Hire a professional: a qualified septic or plumbing contractor can advise on pump, line, and permit requirements if a transition to sewer is offered.

Resources for official guidance and local regulations:

  • Mississippi Department of Environmental Quality (MDEQ) – Onsite Wastewater Program:
  • Mississippi Department of Health (MSDH) – wastewater systems and guidance:
  • U.S. Environmental Protection Agency (EPA) – Septic systems guidance for homeowners: https://www.epa.gov/septic
  • City of Tupelo – Official site (for city sewer information and contacts): https://www.tupeloms.gov/

Septic vs Sewer Across Lee County

How septic systems work in Lee County

  • A typical residential system uses a septic tank buried underground, with effluent moving to a drain field where soil cleans and disperses wastewater.
  • Key components: the tank (holds solids), baffles to control flow, and the drain field or absorption bed.
  • Lifespan and performance depend on usage, soil, and maintenance. With proper care, a system can serve a home for decades.
  • Maintenance basics:
    • Schedule a professional inspection every year or two, and a septic pump every 3–5 years (more often for homes with heavy use or a garbage disposal).
    • Avoid flushing non-biodegradable items, grease, solvents, or chemicals down sinks and toilets.
    • Use water-saving fixtures to reduce load on the system.

When sewer is the preferred option

  • If your home is connected to a municipal or county sewer system, sewage is carried to a wastewater treatment plant rather than a private tank.
  • Benefits of sewer connection:
    • No septic tank pumping or drain-field management for the homeowner.
    • Consistent utility billing and predictable sewer charges.
    • Potentially lower risk of groundwater contamination from a failing individual system when properly managed by the city.
  • What to consider:
    • Connection fees and monthly sewer charges vary by municipality.
    • If sewer lines are not yet available, you may face higher upfront costs to install a septic system.

Cost considerations in Lee County

  • Septic system installation (new home or replacement) typically ranges in the low-to-mid tens of thousands depending on soil, depth to groundwater, and drain-field size. A rough local guideline is roughly $3,000–$8,000+ for a basic setup, not including permits, site work, or engineered designs.
  • Annual maintenance costs:
    • Pumping: approximately $100–$400 depending on local rates and tank size.
    • Inspections: often a few hundred dollars if you hire a professional for periodic checks.
  • Sewer connection costs (if available):
    • One-time hookup fees and monthly service charges will vary by provider; budget for both the initial connection and ongoing monthly bills.

Practical steps to compare options

  1. Check sewer availability for your address:
    • Contact your city or county utility provider to confirm if public sewer is available and whether there are current connection programs.
  2. Assess site constraints:
    • Soil type, slope, and groundwater depth influence drain-field performance and cost for septic systems.
  3. Calculate total cost of ownership:
    • Compare upfront installation or connection costs with long-term pumping, maintenance, and utility bills.
  4. Consider environmental and resale factors:
    • A well-maintained sewer connection can be simpler for some buyers, while a well-kept septic system may be preferred in rural settings.
  5. Plan for maintenance now:
    • Set a reminder for regular inspections and pumping, and adopt water-conserving habits.

Maintenance reminders and best practices

  • Inspect annually; pump every 3–5 years (or per professional guidance) based on usage.
  • Keep the drain field free of heavy equipment and don't plant large trees with deep roots nearby.
  • Use water-efficient fixtures and spread out water use to avoid surges.
  • Dispose of chemicals, paints, solvents, and oils through proper hazardous-waste channels.
  • Monitor for signs of trouble: slow drains, gurgling sounds, odors, or lush, wet patches over the drain field.

Official resources

  • Mississippi Department of Environmental Quality (Onsite Wastewater Program):
  • U.S. Environmental Protection Agency (Septic Systems): https://www.epa.gov/septic