Septic in Monett, MO

Welcome to Monett's septic guide—the friendly, practical neighborhood resource you can trust when it comes to keeping your home's waste system running smoothly. If you've wandered the tree-lined streets near the square or driven out toward the surrounding ranches, you've likely noticed how common private septic systems are in our area. Monett blends historic homes, newer subdivisions, and rural properties, and that mix means a straightforward, on-site approach to wastewater has long been the reliable choice for many families. We'll speak plainly, share real-world tips, and help you feel confident about every step, from installation to everyday maintenance.

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

Yes—septic systems are a familiar sight in Monett. Because municipal sewer lines don't reach every block or lot, many homes—especially older houses and rural properties—rely on private septic systems. If your home isn't connected to city sewer, you should plan on a septic system being part of the property. Before you buy, check the seller's disclosures and confirm with county records or the local utility. If you're already a homeowner, a professional septic inspection can tell you the tank's condition, the integrity of the drain field, and whether upgrades or maintenance are due.

Why homes typically use septic systems in Monett

High-level explanation (why septic exists here): septic systems let wastewater be treated on-site, leveraging soil biology and gravity to separate solids, break down waste, and safely disperse treated water into the drain field. The setup fits Monett's landscape and development pattern—many lots are rural or semi-rural with space for a drain field, and extending centralized sewer to every property would be costly and time-consuming.

• It's often the most practical option for individual lots that aren't on municipal lines.
• Proper design, installation, and regular maintenance keep operating costs predictable and avoid costly sewer connections.
• Local codes require correct sizing, installation by licensed professionals, and periodic maintenance to protect home value and groundwater.

A high-level reminder: septic works best when you understand the system, use it wisely, and keep up with routine care. In the sections that follow, you'll find practical maintenance tips, common trouble signs to watch for, and guidance on what to ask a contractor before buying or upgrading.

Where Septic Systems Are Common in Monett

In-town vs countryside

• Monett's sewer system serves most homes closer to the town center. If you're outside the core service area or on a larger rural lot, septic systems are more common.
• Rural properties, farms, and newer lots with longer driveways or churchill-style setbacks often rely on septic because extending sewer lines isn't practical or cost-effective.
• Even inside town limits, a few hillside or backlot homes may use septic where access to the main line is limited or where a private system is preferred due to lot shape or usage patterns.

Soil and site factors that influence septic suitability

• Well-drained soils make drain fields work best. Deep, sandy loams or loams with adequate percolation are ideal; heavy clays or compacted soils slow drainage and complicate design.
• Rocky or shallow bedrock areas challenge installation. Where bedrock is near the surface, mound systems or alternative designs are often needed.
• Groundwater depth and slope matter. Properties with shallow water tables or steep slopes require special layouts to protect groundwater and reduce runoff into the drain field.
• Karst and sinkhole-prone areas (common in parts of the Ozarks) require extra analysis to prevent contamination and ensure system longevity.

Common lot sizes and configurations in Monett

• City lots: Typically smaller parcels where sewer service is available. Septic is less common but may be found where lines aren't accessible or homes predate sewer expansion.
• Rural lots: Frequently larger (sometimes acres) with pasture or wooded use. Conventional septic drain fields, mound systems, or other alternative designs are seen more often here.
• Sloped or irregular lots: May use chamber systems, raised mounds, or specialty arrangements to maximize soil absorption while meeting setbacks.

What makes septic common in Monett

• The mix of urban fringe and rural landscape means that both sewered and non-sewered properties exist. Where sewer lines aren't feasible to extend, septic systems become a practical, long-term solution.
• Local soil variability—some plots offer excellent absorption, while others require engineered designs—drives a willingness to use professional septic design to fit the lot.
• Missouri regulations require proper siting, permitting, and maintenance to protect water quality, which keeps septic use responsible and reliable in the Monett area.

How to tell if your Monett property is septic-friendly

• Check if your property is within a sewer service area or connected to municipal lines.
• Look up soil information for your exact lot using the Web Soil Survey to understand percolation and drainage (NRCS):
• NRCS Web Soil Survey for soil conditions: https://websoilsurvey.nrcs.usda.gov/

Septic vs Sewer: What Homeowners in Monett Should Know

How septic and sewer differ in Monett

• Septic system: A self-contained underground treatment unit that processes household wastewater on your property.
• Sewer: A municipal system that carries wastewater away via public pipes to a treatment facility.
• In Monett, some homes connect to the city sewer, while others rely on a private septic system. Your service type affects maintenance needs, costs, and responsibilities.

How to tell which system serves your home in Monett

1. Check your water bill and public utilities letters. If you receive a separate sewer bill, you're on the municipal system; if not, you may have a septic system.
2. Look for a buried tank or dosing chamber in your yard and a drainage field. If you don't find a septic tank or field, you're more likely on sewer, but confirm with a local authority.
3. Contact local authorities to confirm service type. Reach out to Monett Public Works or your county health department for an official determination and any permitting records.
4. Locate the sewer cleanout near your home or street. A sewer connection typically involves city infrastructure rather than a buried tank on your property.

Septic system basics for Monett homes

• Typical sizes: Most homeowners have 1,000–1,500 gallons for a standard household, sized to occupancy and usage.
• Pumping frequency: Schedule pumping every 3–5 years, or as recommended by a licensed installer, depending on tank size and household water use.
• Routine care: Use water efficiently, avoid flushing non-biodegradable items, and install drain-field protection (no heavy equipment, no septic additives unless advised by a pro).
• Records matter: Keep a map or photo of tank location, baffles, and the drain field. This helps with future maintenance, repairs, or home sales.
• Environmental note: A well-maintained septic system reduces nutrient loading to groundwater and nearby streams—important for area wells and local water quality.

Sewer service basics for Monett homeowners

• Monthly charges: Public sewer rates vary by municipality and usage; understand what portion of your bill covers sewer, water, or other charges.
• System reliability: Municipal sewers can be affected by blockages, tree roots, and rainfall surges. Backup is more likely if pipes are compromised.
• Maintenance focus: While homeowners don't pump or repair the sewer mains, they should avoid putting grease, wipes labeled "flushable," or large solids down drains to reduce clogs that impact the public system.
• Backups and outages: If you experience multiple-drain backups, unusual gurgling, or sewer odor, contact the municipal utilities immediately to inspect for main line issues or blockages.

Practical maintenance tips you can apply

• Septic owners:
  • Schedule regular pumping and inspections with a licensed septic professional.
  • Use septic-safe products and minimize chemical cleaners that can disrupt beneficial bacteria.
  • Protect the drain field: avoid parking or heavy equipment, plant deep-rooted trees near the field, and prevent surface water from pooling above it.
• Sewer customers:
  • Install and maintain strainers on drains to catch hair and solids.
  • Dispose of cooking oils and fats in the trash, not the sink.
  • Be mindful of what goes into the system—flush only человеческие waste and toilet tissue.

Red flags and when to call a pro

• Septic red flags: Slow drains, gurgling sounds, sewage odors in the yard or house, wet or soggy areas above the drain field, or backups after rainfall.
• Sewer red flags: Frequent backups across multiple fixtures, strong sewage smells, or water damage indicating mainline issues.
• When in doubt, consult a licensed local contractor or the Monett public utilities for guidance and referrals.

Useful resources

• EPA on septic systems:

Typical Septic System Types in Monett

Conventional gravity septic systems

• What it is: A traditional setup with a septic tank that settles solids and clarifies wastewater, then distributes the effluent by gravity to a drainfield.
• When it fits: Best in soils with good percolation, adequate depth to groundwater, and no bedrock obstructions.
• Pros: Simple design, lower upfront cost, straightforward maintenance.
• Cons: Requires suitable soil conditions; performance declines with high water tables or poor drainage.
• Key components: septic tank, distribution box, perforated pipes in a drainfield.
• Maintenance notes: Schedule a pump-out every 3–5 years or as recommended by a licensed pro; avoid flushing flushable wipes, grease, solvents, and harsh chemicals.

Mound systems

• What it is: A raised drainfield built on a sand-fill mound when native soils are too shallow, there's a high water table, or bedrock is near the surface.
• Pros: Works where conventional systems can't due to soil limitations; protects groundwater in challenging sites.
• Cons: Higher initial cost; requires more space and careful landscaping; specialized maintenance.
• Space and setup: A visible mound or raised area above grade with insulated cover and access points for inspections.
• Maintenance notes: Regular inspections and pump-outs as prescribed; ensure vegetation remains non-invasive to the mound's integrity.

Chamber systems

• What it is: Trenchs filled with interconnected plastic chambers instead of traditional gravel and pipe.
• Pros: Faster installation, easier adjustments, often lighter and easier to repair; can be more space-efficient in some layouts.
• Cons: Still needs suitable soils and proper distribution; not a fix for severe soil problems.
• Suitability: Works well on properties with moderate soil conditions and limited space.

Aerobic treatment units (ATU) with a drainfield

• What it is: An advanced treatment system that uses aerobic bacteria to pre-treat wastewater, typically paired with a drainfield or spray irrigation.
• Pros: Higher-quality effluent; better performance in marginal soils; can meet stricter local discharge rules.
• Cons: Higher upfront and ongoing costs; requires electricity and regular professional service.
• Maintenance notes: Regular servicing every 3–6 months is common; schedule annual professional inspections and routine filter/solids removal as needed.

Sand filters and constructed wetlands

• What it is: Secondary treatment stages where effluent passes through a sand bed or a small constructed wetland before reaching the drainfield.
• Pros: Enhanced treatment in difficult soils; can improve system longevity and reduce odor issues.
• Cons: Larger footprint; more parts to maintain; higher ongoing costs.
• Ideal sites: Lots with poor drainage or higher contaminant loads where a standard drainfield may struggle.

Drip dispersal and other advanced distribution methods

• What it is: Subsurface drip lines distribute effluent evenly at low pressure to minimize surface runoff and optimize absorption.
• Pros: Efficient use of space; reduces trench length and surface disruption in tight lots.
• Cons: Requires specialized design, installation, and monitoring; not universally approved.
• Availability: Permitting and suitability depend on local codes and installer qualifications.

How to decide for your Monett property

1. Start with a professional site evaluation to assess soil, depth to groundwater, and any rock or karst features.
2. Consider space, future use of the property, and potential landscaping constraints.
3. Check local permitting requirements and MO guidelines; county health departments often oversee septic approvals.
4. Weigh long-term maintenance costs and the service network available in Monett and Barry County.
5. Confirm installer experience with Missouri soils and the system type you're considering.

For official guidelines and general design considerations, see:

• EPA on-site wastewater/septic systems: https://www.epa.gov/septic
• Missouri health and environmental resources: https://health.mo.gov

Common Septic Issues in Monett

Overloading the System

Heavy water use, leaks, and disposing of non-biodegradable waste can push a septic tank past its capacity, causing backups and slow drains. In Monett, seasonal rainfall and a relatively high water table in parts of the area can worsen overload situations when the drainfield is already stressed.

Signs

• Slow drains, especially after laundry or showers
• Gurgling toilets or sinks
• Wastewater surfacing in the yard or backing up in fixtures
• Lush, unusually green patches over the drainfield

What to do (step-by-step)

1. Audit water use: spread out laundry and dishwashing; avoid long showers during runoff periods.
2. Retrofit with high-efficiency fixtures (low-flow toilets, showerheads, and front-load washers).
3. Limit garbage disposals and avoid flushing wipes, grease, or chemicals.
4. Schedule pumping and inspection with a licensed septic contractor; aim for pump intervals recommended by the pro and your local health department.

Learn more:

Tree Roots and Landscaping Interference

Tree roots and aggressive landscaping can invade drain lines or compress the soil around the drainfield, reducing absorption and causing backups or surcharges.

Signs

• Cracks or damage along the lateral lines
• Sudden reduction in system performance after planting trees nearby
• Roots visible in access ports or cracks in the tank

What to do (step-by-step)

1. Avoid planting trees or deep-rooted shrubs directly over the drainfield; remove problematic trees if feasible.
2. Install root barriers to redirect roots away from the system.
3. Keep heavy equipment off the drainfield area to prevent soil compaction.
4. Schedule a professional inspection to map pipe routes and assess root intrusion.

Learn more: https://www.epa.gov/septic

Karst Geology and Groundwater Considerations

Southwest Missouri sits in a region with karst features and limestone deposits. In Monett, these conditions can lead to rapid transport of contaminants from septic systems to groundwater if protections aren't in place, especially with poorly drained soils or a high water table.

Signs

• Unexpected odors or seepage during wet periods
• Nearby wells showing unusual water characteristics after septic issues
• Quick changes in sewer performance after storms

What to do (step-by-step)

1. Do not dump harmful chemicals, solvents, or large quantities of grease into the system; use septic-safe products.
2. Pump on a schedule and maintain a buffer between the septic field and any wells or drinking water sources.
3. Have a professional assess drainage and potential barriers as needed; consider protective containment or alternative designs if required by local authorities.

Learn more: https://www.epa.gov/septic

Maintenance, Safe Use, and Common Misuses

Many failures stem from neglect or misuse rather than a single breakdown.

Signs

• Frequent backups despite regular pumping
• Slowed entering of wastewater after new fixtures or changes in usage

What to do (step-by-step)

1. Pump every 3–5 years or per the recommendations of your local contractor and health department; more often with heavy use or a tank with a garbage disposal.
2. Use septic-safe products and avoid chemical drain cleaners or solvents.
3. Maintain records of pumping and inspections to guide future service.
4. Educate all household members about what can and cannot go into the system.

Learn more: https://www.epa.gov/septic

Septic Inspection, Permits & Local Oversight

Local Oversight and Permits

• Missouri regulates private wastewater systems at the state level, but permits and inspections are carried out locally. In Monett, the local county health department or city government typically administers permits and inspections.
• The Missouri Department of Natural Resources (DNR) sets design and performance standards for private sewage systems. Local officials ensure plans meet those standards and that installations are inspected.
• Always verify who handles your permit before digging or starting work. If you're outside city limits, expect Barry County Health Department to be the primary contact; inside Monett city limits, check with the city planning/health office.

What to expect:

• Permit and plan review are usually required for new systems, significant repairs, or system replacements.
• A licensed designer or wastewater installer often prepares the approved plan and supporting site information.

When a Permit Is Required

• New private wastewater systems for new homes or additions.
• Replacing a failed or undersized system.
• Substantial repairs or upgrades that change the system design, capacity, or layout.
• Expanding living space or adding fixtures that increase wastewater load.

Inspection Requirements

• Site evaluation and design review: A licensed professional may prepare a site evaluation and a system design that meets DNR criteria; this is typically submitted with the permit application.
• Installation inspection: The local authority conducts an on-site inspection during and after installation to verify installation matches the approved plan.
• Final approval: A final inspection is required to certify the system is properly installed and ready for use.
• Transfers and routine concerns: Some jurisdictions require a system check or pumping history during home sales; check with your local office to confirm requirements.
• Maintenance records: Keep pumping and maintenance records on hand; they may be requested by lenders, buyers, or the local authority during inspections.

Permitting Process in Monett / Barry County

1. Contact the appropriate local office (Barry County Health Department or Monett city officials) to confirm permit needs and jurisdiction for your property.
2. Hire a licensed septic designer or wastewater installer to prepare a plan and site evaluation that complies with DNR standards.
3. Submit the permit application, design plans, and any required fees to the issuing authority.
4. Await permit approval or small revisions; once approved, obtain the permit to proceed.
5. Schedule and complete the installation per the approved plan; arrange the required on-site inspection with the local authority.
6. Pass the inspection and receive final approval; keep the permit and inspection records for your property files.
7. If you're selling, provide the current owner's records and any inspection results requested by the buyer or lender.

For Homebuyers and Sellers

• Request a septic system inspection as part of due diligence; review past pumping records, repairs, and any backfilled or altered components.
• Have the system evaluated by a licensed professional before close to identify issues that could affect financing or habitability.
• If repairs or upgrades were made, ensure permits were obtained and final inspections completed.

Helpful Tips and Common Pitfalls

• Start with the local office to confirm jurisdiction and permit requirements early in the project.
• Use a licensed designer/installer; Missouri regularizes professional credentials for private wastewater work.
• Don't bury or cover components before an inspection or approval is obtained.
• Keep all permit, plan, inspection, and maintenance documents together in a readily accessible folder.

Official Resources

• Missouri Department of Natural Resources: Private Sewage Disposal (Wastewater Management) —
• Missouri Department of Health and Senior Services Local Public Health Agencies Directory —

Septic Maintenance for Homes in Monett

Monett-specific realities

Monett's soils are often clay-heavy, and spring rains can saturate drain fields quickly. Tree roots from nearby landscaping are a common cause of intrusion in older systems, and a higher water table after wet seasons can bring effluent closer to the surface. Yard size and lot configuration vary, so maintenance plans should be tailored to your property. Seasonal freezes and thaws in southwest Missouri also influence how often you need service and how you use water inside the home.

Regular pumping and inspection

• Schedule pumping every 3–5 years for typical households; more often if you have a garbage disposal, large family, or heavy water use.
• Have a licensed septic professional perform a two-part service: (1) pump out settled solids, (2) inspect tank baffles, inlet/outlet pipes, and the effluent screen (if present) and check for signs of structural issues.
• Maintain a simple log of pumping dates, notable observations, and any repairs.

Water usage and appliance habits

• Space out laundry loads; use high-efficiency machines and avoid back-to-back full cycles.
• Run the dishwasher only when full and choose energy-saving modes when available.
• Install faucet aerators and low-flow showerheads to reduce daily water use.
• Flushing only toilet paper and human waste keeps clogs away; avoid flushing wipes, sanitary products, and chemicals down the drain.

Drainfield care in Monett soils

• Plant trees away from the leach field; roots can intrude and damage pipes.
• Do not park, drive, or place heavy loads on the drain field; soil compaction stresses the system.
• Avoid adding septic additives as a guaranteed fix; consult a local pro and follow state guidelines.
• Keep landscape irrigation and surface water away from the drain field to prevent oversaturation.

Seasonal considerations

• After heavy spring rains, monitor for surface damp spots or slow drainage; contact a pro if effluent is visible or odors appear.
• In winter, monitor for pooling or saturated soil over the field; prolonged saturation may require evaluation.
• Plan for ground shifts and freeze–thaw cycles by ensuring the cover area remains stable and undisturbed.

Warning signs to act on promptly

• Gurgling sounds, sewage backups, or sewer odors inside the home.
• Soggy soil, unusually lush patches, or a strong smell sitting over the drain field.
• Backups in sinks or tubs after normal water use.

If you suspect a problem, follow these steps

1. Conserve water immediately to reduce load on the system.
2. Contact a licensed septic professional for a site visit and diagnostics.
3. Avoid DIY repairs unless you're trained; improper handling can cause more damage or contamination.
4. Schedule a formal inspection to confirm tank integrity and drain-field condition and to receive recommended actions.

Official resources and guidelines

• Missouri Department of Health and Senior Services – Onsite Wastewater (OSTP):
• U.S. Environmental Protection Agency – Septic Systems: Homeowner's Guide: https://www.epa.gov/septic
• Missouri Department of Natural Resources (for state-specific soils and groundwater considerations): https://dnr.mo.gov/

Cost Expectations for Septic Services in Monett

Septic Tank Pumping

• What it includes: removal of liquids and sludge from the septic tank, inspection of tank condition and outlet baffle, lid and access integrity check, and a brief written note on tank health.
• Monett-specific considerations: accessibility can vary—tight driveways, gravel pads, and winter weather can affect scheduling. Expect possible extra charges if a tank is hard to reach.
• Typical cost in Monett: roughly $200–$500 for a standard 1,000–1,500 gallon tank; 1,500–2,000 gallon tanks or difficult access can run $350–$700.
• 4-step process:
  1. Schedule with a licensed pumper.
  2. Locate and verify tank access.
  3. Pump and remove contents.
  4. Receive a brief condition report and recommendations.
• Official resources:

Septic System Inspection

• What it includes: visual inspection of tank, drain field, and plumbing components; check for odors, standing water, and signs of failure; basic flow test; pumping optional; report with findings.
• Monett-specific considerations: often required for real estate transactions or loan approvals; some lenders request a full report with photos.
• Typical cost in Monett: $150–$300 for a basic inspection; $300–$500 for enhanced inspection (including camera or dye tests).
• 4-step process:
  1. Book with an inspector certified for on-site systems.
  2. Conduct surface and component checks.
  3. If requested, perform dye test or video inspection.
  4. Review findings and recommended next steps.
• Official resources: https://epa.gov/septic and https://dnr.mo.gov/environment/waste-management/onsite-waste-water-systems

Drain Field Evaluation (Leach Field)

• What it includes: soil tests or probes to assess absorption capacity, evaluation of effluent distribution, and a determination of whether the drain field is functioning.
• Monett-specific considerations: Barry County soils vary; evaluations help determine if a field is failing due to saturation, compaction, or age.
• Typical cost in Monett: $150–$350 for a formal evaluation; additional charges if dye tests or advanced imaging are performed.
• 4-step process:
  1. Schedule evaluation with a qualified technician.
  2. Conduct soil and field checks.
  3. Interpret results with repair or replacement recommendations.
  4. Obtain a written report for records or permits.
• Official resources: https://dnr.mo.gov/environment/waste-management/onsite-waste-water-systems

Drain Field Repair

• What it includes: trench repair or replacement, intact piping fixes, component replacement (valves, distribution box), and restoration of field performance.
• Monett-specific considerations: clay soils or rocky terrain can complicate digging and increase costs; permits may be required.
• Typical cost in Monett: roughly $2,500–$7,500 for partial repairs; $5,000–$15,000+ for more extensive work or multiple failed trenches.
• 4-step process:
  1. Diagnose failure source (soil test, pressure tests, video if needed).
  2. Design repair plan aligned with lot constraints.
  3. Obtain necessary permits.
  4. Implement repair and test system after work.
• Official resources: https://dnr.mo.gov/environment/waste-management/onsite-waste-water-systems

Drain Field Replacement / System Replacement

• What it includes: full replacement of the drain field plus tank as needed, sometimes with a mound or alternative system if site conditions restrict conventional fields.
• Monett-specific considerations: replacement drives substantial cost variability based on soil, slope, and space; mound or alternative designs are more common in constrained lots.
• Typical cost in Monett: $8,000–$25,000 for standard replacement; $15,000–$40,000+ for mound or advanced systems.
• 4-step process:
  1. Conduct site evaluation and design.
  2. Obtain required permits.
  3. Install new tank and field or mound system.
  4. Final inspection and startup.
• Official resources: https://epa.gov/septic and https://dnr.mo.gov/environment/waste-management/onsite-waste-water-systems

New Septic System Installation

• What it includes: site assessment, soil percolation tests, system design, permit acquisition, installation of tank, distribution box, leach field or mound, and initial startup.
• Monett-specific considerations: local soils and topography can influence system type (conventional vs. mound) and installation logistics.
• Typical cost in Monett: $10,000–$30,000+ for a basic system; more for larger homes, challenging soils, or mound installations.
• 4-step process:
  1. Perform site evaluation and percolation tests.
  2. Design the system to meet usage needs and code.
  3. Secure permits and schedule installation.
  4. Install, backfill, and test the system.
• Official resources: https://epa.gov/septic and https://dnr.mo.gov/environment/waste-management/onsite-waste-water-systems

Maintenance Plans and Scheduled Pumping Contracts

• What it includes: regular pumping every 3–5 years (depending on usage and tank size), annual inspections, effluent filter cleaning, and dilution or root-control recommendations.
• Monett-specific considerations: proactive maintenance can prevent costly field failures; some lenders or insurers offer discounts with proof of maintenance.
• Typical cost in Monett: $100–$300 per visit or $120–$300 per year when bundled; some providers offer annual service contracts.
• 4-step process:
  1. Choose a maintenance plan with a licensed provider.
  2. Schedule routine visits.
  3. Perform pumping and inspections on the agreed interval.
  4. Receive ongoing maintenance recommendations and service records.
• Official resources: https://dnr.mo.gov/environment/waste-management/onsite-waste-water-systems

Septic Tank Repairs and Upgrades (Baffles, Risers, and Access)

• What it includes: replacing or repairing tank baffles, adding or raising risers for easier access, sealing cracks, and improving tank integrity.
• Monett-specific considerations: adding risers improves future access and reduces pump time; aging tanks in older neighborhoods may need more frequent attention.
• Typical cost in Monett: $300–$1,500 for repairs; additional costs for major tank replacement or upgrades.
• 4-step process:
  1. Assess tank condition and accessibility.
  2. Choose repair or upgrade options.
  3. Complete work and reseal/retire inaccessible components.
  4. Test system function post-repair.
• Official resources: https://epa.gov/septic

Notes:

• All cost ranges are typical estimates for Monett, MO and can vary with tank size, soil conditions, accessibility, and local permitting requirements.
• Always hire a licensed septic contractor familiar with Missouri on-site wastewater rules; you may need permits from the Missouri Department of Natural Resources (DNR) or local health officials. For official guidance, see: https://dnr.mo.gov/environment/waste-management/onsite-waste-water-systems and https://epa.gov/septic