Septic in Milliken, CO

In Milliken, where the prairie breeze drifts through quiet streets and wide-open lots, many homes rely on septic systems that keep wastewater safely off the yard and out of sight. Is septic common in Milliken? Yes. For a lot of households—especially older homes, rural parcels, or places a bit outside the town sewer grid—on-site septic is the standard. If you own or are buying a home here, you should expect that a septic system might be part of the property, and you'll want to understand how to care for it. Knowing what's beneath the yard saves headaches later and helps your home stay comfortable and safe.

Why Milliken homes use septic

Because many properties here aren't tied directly to a centralized sewer main, extending sewer lines across miles of rural land can be expensive and disruptive. That's why on-site systems have been a practical, long-standing solution for single-family homes in the area. Key factors include:

• Lot size and zoning in and around Milliken, which often favors individual septic systems.
• Local infrastructure realities: not every street has a nearby sewer main, and adding lines here can be prohibitive.
• Economic practicality: a well-designed septic system can be a cost-effective, long-term option for homes.
• Soil and climate considerations in Weld County, which influence system design and performance.

High-level explanation (why septic exists here)

Think of a septic system as a compact, on-site treatment plant: a tank that settles solids, plus a soil absorption field that cleans and distributes the liquid. In Milliken, the success of that setup depends on selecting the right design for the specific soils, depth to groundwater, and seasonal weather. When installed correctly by a licensed professional, a septic system can serve a home for 20-30 years or more with regular care. This on-site approach exists here because it provides reliable wastewater management where extending centralized sewer service isn't practical or cost-effective.

Here's what this guide aims to help with

As your local, friendly, professional partner, we'll walk you through practical maintenance, buying a home with septic, inspection basics, and how to choose a trusted local contractor. Quick reminders you'll see highlighted along the way:

• Pumping and maintenance schedules (typical ranges are every 3-5 years, depending on use).
• What to avoid flushing or pouring down drains to protect the system's health.
• Early warning signs of trouble, and when to call a pro.
• How to find a Milliken septic expert who understands local soils and regulations.

Where Septic Systems Are Common in Milliken

Geographic patterns in Milliken

• In Milliken, septic systems are most commonly found on properties that sit outside the town's centralized sewer service or on rural-Residential and agricultural parcels. If you're on a larger lot or out toward the town's edge, you're much more likely to have a private onsite system.
• Farms, horse properties, and single-family homes on multi-acre or semi-rural lots frequently rely on septic because extending municipal sewer to every parcel isn't practical or cost-effective.

Why septic is common in these areas

• Distance from sewer mains: The cost to install new sewer mains and service connections for remote parcels is significant, so many property owners choose septic.
• Lot size and land use: Larger lots and mixed-use properties (residential with some agricultural use) often use onsite systems to manage wastewater in a cost-efficient way.
• Infrastructure constraints: In parts of Milliken, existing sewer lines may not extend to all neighborhoods, especially newer developments or fringe areas.

Parcel sizes and zoning that support septic use

• Typical parcels: Many Milliken homes with septic sit on 0.25 to 2+ acre parcels, with the exact size depending on neighborhood planning and land availability.
• Zoning influence: Rural-residential and agricultural zones are more likely to use on-site wastewater systems than dense, urban-style neighborhoods where sewer service is common.
• Planning and permitting: Even when septic is common, homeowners must follow state and county permitting requirements for installation, maintenance, and abandonment.

Soil types and groundwater considerations

• Soil drainage matters: Well-drained soils (sandy loams, loams) support conventional septic drainfields more easily.
• Clay and slow-draining soils: Heavier soils can limit absorption and may require alternative designs (such as mound systems or other engineered OWTS) to achieve proper treatment and seepage.
• Water table and wells: Proximity to shallow groundwater or wells influences system design and setback requirements to protect drinking water supplies.
• Climate impact: Freeze-thaw cycles and winter conditions in northern Colorado affect soil performance and installation timing, underscoring the need for properly engineered systems.

Common system types you'll encounter around Milliken

• Conventional gravity septic systems on suitable soils with a buried drainfield.
• Mound systems on sites with poor drainage or high seasonal water, where a raised drainfield is needed.
• Advanced treatment units (ATUs) and aerobic treatment units for properties with limited space or restrictive soils, followed by a drainfield.
• Sand filtration or other enhanced treatment options in areas with challenging groundwater or soil conditions.
• System abandonment or replacement scenarios when homes are connected to new sewer lines or when the old system fails.

Practical takeaways for Milliken homeowners

• Verify sewer service status: Use local maps or contact the Town of Milliken and Weld County to confirm whether your property is within a municipal sewer district or outside it.
• Expect inspections and permits: Any new installation, substantial repair, or modification typically requires approval from the Weld County Health Department or your local health authority and a licensed contractor.
• Plan for maintenance: Homes with septic will require regular pumping and inspections to prevent failures and protect groundwater. Typical pumping intervals vary by usage and tank size.
• Prepare for soil-driven design: If you're buying property or planning renovations, have a soil evaluation done by a licensed designer to determine the most appropriate OWTS type for your site.

Official resources

• Colorado Department of Public Health and Environment – Onsite Wastewater Treatment Systems (OWTS):
• Weld County Health Department – Onsite Wastewater/Septic Information:
• Town of Milliken (official): https://www.millikenco.gov/
• EPA Septic Systems – Information for homeowners: https://www.epa.gov/septic

Septic vs Sewer: What Homeowners in Milliken Should Know

How the systems differ

• Septic system: Waste stays on your property in a buried tank and drain field. It treats wastewater on-site with minimal municipal involvement.
• Sewer system: Waste is collected by a municipal or district sewer system and sent to a centralized treatment plant. Homeowners typically pay a monthly or quarterly sewer bill.

Benefits and trade-offs

• Septic: potentially lower monthly bills, more independence, but requires regular maintenance and responsible water usage.
• Sewer: convenient maintenance handled by the utility, but monthly costs can add up, and you rely on system reliability and city approvals.

Is your Milliken home on septic or sewer?

• Check with your utility provider or recent water/sewer bill to confirm connection type.
• Look for a house line that runs to a municipal sewer main in the street or a septic tank/access lid on the property.
• If you're unsure, ask your real estate agent when buying, or review your property records. Local codes and county records can confirm the system type for your address.

Cost considerations for Milliken homeowners

• Septic upfront vs ongoing: Installation of a septic system is a major upfront investment (tank, lines, and possibly a drain field), with long-term maintenance costs.
• Ongoing septic costs: Regular pumping (typical guidance is every 3–5 years, depending on tank size and usage), routine inspections, and occasional repairs.
• Sewer costs: Monthly or quarterly utility bills cover usage, intercepts, and some maintenance; major repairs to the sewer system are borne by the utility or, in some cases, by the property owner if there are on-site issues.

Maintenance basics you can start today

• Water use: Space out loads, fix leaks, and spread out high-water-use activities to minimize stress on the system.
• Waste disposal: Only flush toilet paper; avoid flushing wipes, chemicals, grease, solvents, or medications.
• Safe additives: Use septic-safe products and avoid enzymes or chemicals that aren't recommended for your tank; follow local guidelines.
• Drain field protection: Keep heavy equipment off the drain field area, plant only shallow-rooted vegetation, and direct surface water away from the area.
• Documentation: Keep a maintenance log of pumping dates, inspections, and repairs; know tank size and location.

Step-by-step upkeep

1. Schedule professional pumping based on tank size and family needs. 2) Schedule periodic inspections with a licensed septic contractor. 3) Inspect for signs of distress (foul odors, damp spots, backups). 4) Review and adjust household habits to protect the system (grease management, trash disposal, and water use). 5) Maintain records and update your service provider about any changes in usage or landscaping near the drain field.

Red flags: when to call a pro

• Slow drains, gurgling sounds, or sewage backups in toilets or sinks.
• Wet, soggy spots, strong odors, or lush, unusually green patches over the drain field.
• Repeated pumpings within a short period or visible changes in yard grading around the system.

Official resources for Milliken homeowners

• EPA Septic Systems:
• EPA: What to do if your septic system fails: https://www.epa.gov/septic/what-can-you-do-if-your-system-fails

Typical Septic System Types in Milliken

Conventional septic systems (gravity feed)

A traditional setup that uses gravity to move wastewater from the tank to a drainfield. Most Milliken homes with typical soils use this layout.

• Components: a buried septic tank, a distribution box, and a drainfield with perforated pipes in trenches.
• How it works: wastewater solids settle in the tank; clarified liquid flows to the drainfield where it's absorbed by soil.
• Best fit: soils with adequate percolation and a reasonable groundwater separation.
• Maintenance note: pumping every 3–5 years is common, but your interval depends on household size, water use, and tank size. See local guidance for timing.

Chamber or trench drainfields

A modern alternative to traditional gravel-filled trenches, using prefabricated plastic chambers to form long, high-flow pathways.

• Why homeowners choose this: quicker installation, sometimes easier inspection, and good performance in a range of soils.
• How it works: wastewater effluent travels through the chambers and percolates into the surrounding soil.
• Considerations: proper chamber sizing and soil suitability are essential; professional design helps ensure long-term performance.

Mound systems (for challenging soils)

Used when the native soil is too shallow, too rocky, or has a high water table for a conventional drainfield.

• Structure: a raised bed of sand contained by fabric and gravel, with perforated pipes on top.
• When it's needed: limited soil depth, poor drainage, or seasonal high groundwater.
• What to expect: higher installation cost and ongoing maintenance from a licensed septic professional.

Aerobic treatment units (ATUs) and packaged systems

Pretreat wastewater with oxygen to produce a higher-quality effluent before it enters the drainfield.

• Benefits: better treatment in less-than-ideal soils and for properties with limited space.
• Requirements: electrical power, routine maintenance, and regular professional inspections.
• Ideal for: properties with restrictive soils, small lots, or where enhanced treatment is beneficial.

Drip irrigation and evapotranspiration (ET) beds

Less common in milder climates, but used in certain Milliken settings to disperse treated effluent more evenly.

• How it works: treated effluent is delivered via drip lines or ET beds to minimize surface exposure.
• Key factors: requires precise design, reliable water pressure, and careful management to prevent surface ponding.

Pumped systems and STEP/SDP options

For properties with elevation changes or remote drainfields, pumped or submersible-discharge systems may be used to move effluent.

• STEP (septic tank effluent pumping) and SDP (septic distribution pumps) help overcome slope or depth challenges.
• What to watch: electrical reliability, pump maintenance, and alarm checks.

Quick-start maintenance steps (for any system)

1. Identify your system type and locate the access ports and tank(s).
2. Schedule professional pumping at the manufacturer-recommended interval.
3. Use water wisely: fix leaks, spread laundry across days, and run full loads.
4. Keep records of maintenance, pumping, and inspections for future service.
5. Have a licensed septic professional inspect every 1–3 years, or per local guidance.

Local considerations and guidance

• Milliken sits within Weld County and Colorado's regulatory environment for onsite wastewater. Work with a licensed designer or installer to confirm soil suitability and to obtain necessary permits.
• For official guidance on onsite wastewater systems in Colorado, see the Colorado Department of Public Health and Environment: Additional information from EPA about septic systems is available at https://www.epa.gov/septic.

Common Septic Issues in Milliken

High Water Table and Drainfield Saturation

• Milliken sits in a region where seasonal moisture and irrigation can keep soils moist deeper than in drier areas. When the drainfield area stays saturated, your system can't absorb effluent properly.
• Signs to watch for:
  • Slow drains, gurgling sounds, or standing water over the drainfield.
  • Strong sewage odors near the tank or distribution lines.
• What to do (step-by-step):
  1. Reduce water use during wet seasons and high-water-table periods (dishwashers, showers, laundry in smaller bursts).
  2. Space out irrigation to avoid continuously saturating the drainfield.
  3. Have a septic professional evaluate whether a dosed or alternative drainfield design (such as a mound or chamber system) is warranted.
  4. Schedule regular pumping if sludge levels are high or effluent is backing up.

Soil Type and Drainage: Clay or Shallow Bedrock

• Many Milliken properties sit on soils with clay or shallow bedrock, which drain more slowly than sandy soils. This reduces the soil's ability to treat effluent and can lead to premature failure.
• Common indicators:
  • Wet or muddy areas in the yard after rainfall.
  • Soils that crust or compact easily, limiting percolation.
• Practical steps:
  1. Get a percolation test and soil analysis before major system work.
  2. Consider drainage-enhanced designs (mound systems, chambered fields, or pump-chamber layouts) suited to limited absorption zones.
  3. Avoid compacting the soil near the drainfield with heavy equipment or foot traffic.

Groundwater Proximity and Well Interference

• In Milliken, many homes rely on private wells. A high water table or groundwater movement near the drainfield can push effluent toward wells or reduce treatment efficiency.
• Red flags:
  • Unusual odors on the property, especially near wells or away from the house.
  • Recent changes in well water quality or taste during wet periods.
• Best practices:
  1. Maintain recommended setbacks between septic components and wells per local codes.
  2. Have the system inspected if you've seen rising water tables or backflow symptoms.
  3. Use professional service if you suspect cross-contamination or compromised separation distances.

Root Intrusion and Landscaping Interference

• Trees and shrubs planted too close to the septic system can grow roots into lines or the drainfield, causing blockages and damage.
• Early warning signs:
  • Cracked or sunken pavement, lush green patches over the drainfield, or odor in the yard.
• Management tips:
  1. Replant away from the drainfield and use shallow-rooted vegetation above the area.
  2. Schedule professional camera inspections to detect root intrusion before major damage.
  3. If roots are present, consider root barrier installation and a targeted cleanout/repair plan.

Overload from Water Use and Household Changes

• Increases from guests, heavy laundry days, or new appliances can overwhelm a system that's not sized for the current load or that hasn't been pumped recently.
• Quick checks:
  • Are you routinely using more than the system was designed for? Have you added a bathroom, a hot tub, or irrigation changes?
• Actions to take:
  1. Spread high-water-use activities (laundry, baths) across the week.
  2. Upgrade or adjust system components if the tank is undersized for the demand.
  3. Keep a pumping schedule and track solids buildup to avoid premature failure.

Freeze-Thaw, Seasonal Challenges, and Maintenance

• Colorado's climate brings freeze-thaw cycles that can affect buried components, lids, and access risers. Frost heave and soil heave can misalign pipes and damage fittings.
• Preventive steps:
  1. Ensure adequate cover and proper insulation around the tank and lines.
  2. Keep access lids clear of snow and ice; insulate frost-prone areas as advised by your pro.
  3. Schedule regular inspections before winter and after heavy snowfall or thaw events.

Signs of trouble to look for across Milliken

• Persistent odors, damp spots, lush vegetation over the drainfield, slow drains, or sewage backups.
• If you notice these, contact a licensed septic professional promptly to avoid costly damage.

Official resources

• EPA: Septic Systems (general guidance and maintenance)

Septic Inspection, Permits & Local Oversight

Local oversight in Milliken, CO

• In Milliken (Weld County), septic systems are overseen by a mix of town and county agencies. The town's building/planning department often coordinates with Weld County Public Health & Environment to issue permits and schedule inspections.
• The goal is to ensure the system is properly designed, correctly installed, and safe for your home, well water, and the environment. Always confirm who issues permits for your property before starting work.

Permits you may need

• New system installation or replacement
• System alterations (including drainfield changes, tank relocation, or tank replacement)
• Additions or renovations that change wastewater flow
• Commercial or multi‑unit projects (often higher permitting requirements)

What to expect:

• Permit issuance before any excavation or installation begins.
• Permit fees vary by project size and complexity; your local office can give an exact quote.
• A permit number will be tied to the project and used for inspections.

Required inspections

• Plan review and permit approval (before any work starts)
• Rough‑in inspection (tanks, piping, and baffled configurations)
• Drainfield inspection (proper backfill, grading, and separation distances)
• Final inspection and system certification to operate
• Re‑inspection may be needed if changes occur or if issues are found

Step-by-step: the inspection process

1. Contact the local authority to verify permit requirements and schedule inspections. Have your address, parcel number, and planned system design ready.
2. Hire a licensed septic installer. They typically coordinate inspection dates with the city/county.
3. Submit plans for review, if required, and obtain the permit number before breaking ground.
4. Install per the approved design, with all components accessible (tanks, lids, risers).
5. Schedule and pass each inspection in sequence (rough‑in, drainfield, final).
6. Receive final approval and certification to operate. Keep the certificate with your system records.

What inspectors look for:

• Correct setbacks from wells, watercourses, and foundations
• Proper tank sizing, baffles, and risers; secure, accessible lids
• Correct piping slopes, cleanouts, and effluent discharge location
• Adequate drainfield absorption area and soil compatibility
• Compliance with local setbacks, access, and vehicle/maintenance paths

What to have on hand

• Property/address and parcel information
• Design drawings or system plan (location of tanks, drainfield, and dispersal areas)
• Permit number and project scope
• Any site evaluations or percolation test results
• Maintenance plan and access to future service

Finding a licensed professional

• Hire a licensed septic installer or design professional familiar with Colorado OWTS requirements.
• Ask for references and a written plan, timeline, and cost estimate.
• Confirm the installer coordinates inspections with Milliken/Weld County authorities.

Resources and official guidance

• Colorado Department of Public Health & Environment – Onsite Wastewater Systems (OWTS): official state guidance and compliance information.
• Weld County Public Health & Environment (Environmental Health) – local oversight and permit processes. (navigate to Public Health & Environment or Environmental Health for septic-related information)
• Town of Milliken – Building Permits or Planning Department (verify local permitting requirements and scheduling). [Milliken official site] https://www.millikenco.gov/

Septic Maintenance for Homes in Milliken

Milliken-specific climate and soil considerations

Milliken sits in a high-desert climate with cold winters and a relatively short growing season. Freeze-thaw cycles can stress drainfields and buried tanks if the system isn't cared for. Local soils in parts of Weld County range from sandy loams to heavier clays, with shallow water tables in some parcels. Both conditions can influence drainage, effluent absorption, and the risk of perched water around the leach field. Because many Milliken homes also rely on irrigation for lawns and landscaping, waste-water load can spike in the growing season if water use isn't managed. Plan for proactive maintenance and smart water use to protect the drainfield year-round.

Maintenance at a glance

• Monitor water use and avoid dumping solids, oils, greases, and harsh cleaners down drains.
• Schedule a professional inspection at least once a year; pump-out intervals depend on household size and tank size.
• Keep the drainfield area clear: no construction, vehicles, or planting with deep roots over the absorption area.
• Redirect roof and surface water away from the drainfield; be mindful of irrigation runoff that could saturate the soil.
• Use low-flow fixtures and consider composting or wastewater-conscious laundry practices to reduce load.

Pumping and inspection steps

1. Identify tank locations and access covers; keep access clear for service visits.
2. For new or renovated systems, obtain as-built drawings from the installer or the county records office.
3. Have a licensed septic contractor pump the tank on a scheduled cycle (typical ranges are every 3–5 years for many households, but your interval depends on tank size, number of occupants, and water use).
4. During every service, the pro should:
   • Inspect baffles and tees for integrity.
   • Check the pump chamber (if present) and alarms for automated systems.
   • Inspect the outlet filter (if your system has one) and clean or replace as needed.
5. Document pump dates and findings; maintain a simple maintenance log for future reference.

Drainfield protection: do's and don'ts

• Do plant only shallow-rooted grasses near the absorption area; avoid trees, shrubs, vegetable beds, or deep-rooted ornamentals within at least 10–20 feet of the field (local guidelines vary, ask your pro).
• Do not drive or park heavy equipment on the drainfield or its access paths; weight can compact soil and damage trenches.
• Do not connect sump pumps, French drains, or dewatering devices to the septic system.
• Do not use septic "additives" or chemical cleaners as a blanket fix; most modern systems don't require them and improper use can upset the biological treatment.
• Do not irrigate over the drainfield; redirect sprinkler heads away from the absorption area and spread irrigation load across your landscape.

Seasonal and climate considerations for Milliken

• In winter, protect the system from freeze damage: ensure adequate soil cover, and avoid adding large amounts of water to the tank during frost seasons.
• In spring and early summer, watch for surface pooling or unusually lush grass patches above the drainfield; these can indicate a failing system or an overloaded field.
• If you rely heavily on irrigation in Milliken, stagger outdoor water use and run laundry or dishwashing during cooler parts of the day to reduce peak load on the system.

Troubleshooting and when to call a pro

• Signs of trouble: sewage odors around the tank or drainfield, gurgling drains, toilets taking longer to flush, soggy or lush drainfield areas, or standing water near the system.
• If you observe any of these, contact a licensed septic professional promptly. Do not attempt to excavate or repair the field yourself.
• For inspections, expect the pro to assess tank integrity, baffles, pump equipment, outlet conditions, and drainfield soil absorption capacity.

Resources

• Colorado Department of Public Health and Environment – Septic Systems:
• U.S. Environmental Protection Agency – Septic Systems: https://www.epa.gov/septic

Cost Expectations for Septic Services in Milliken

Septic Tank Pumping

• What's included: removing wastewater and sludge from the septic tank, checking baffles and inlet/outlet health, inspecting for signs of leaks, and ensuring proper operation of the system after pumping. In Milliken, winter access and travel to distant disposal sites can affect timing and price.
• Milliken-specific notes: colder soils and occasional winter road restrictions can add a bit to travel time or require service windows when access is safer.
• Typical cost in Milliken: $300–$600 for a standard 1,000-gallon tank. If you have a larger tank (1500–2000 gallons) or multiple tanks, expect the price to rise proportionally.
• Quick steps you can expect:
  1. Technician arrives and confirms tank size.
  2. Tank is pumped clean, contents disposed at a permitted facility.
  3. Float and baffle condition checked; you're briefed on the tank's remaining life and next pumping interval.

Routine Seepage/Preventive Maintenance Inspections

• What's included: visual system inspection, cover and accessibility check, sludge/scum level estimation, pump and electrical checks if present, and recommendations for interval pumping. Some packages may include a camera inspection of the laterals if indicated.
• Milliken-specific notes: due to soil and drainage conditions in parts of Weld County, annual or biennial inspections are common to prevent surprises; local crews may suggest more frequent checks if you're on a septic-heavy workload (e.g., large households or frequent guests).
• Typical cost in Milliken: $150–$350 for a standard inspection. Add $200–$350 if a full camera inspection of the drain field is included.
• Quick steps you can expect:
  1. Technician reviews past service history.
  2. Visual and functional checks are completed.
  3. Clear maintenance plan and pumping schedule are provided.

New Septic System Installation

• What's included: site evaluation, system design by a qualified designer, obtaining permits, tank installation, drain-field construction, backfill, and final inspection.
• Milliken-specific notes: Weld County and CDPHE oversight govern design standards; soil tests and site constraints (space, slope, proximity to groundwater) influence layout and cost.
• Typical cost in Milliken: roughly $10,000–$25,000 for a basic 1,000–1,500 gallon system; more complex sites or larger homes can range from $25,000–$40,000+.
• Quick steps you can expect:
  1. Engineer/designer creates a plan compliant with local codes.
  2. Permits are filed and fees paid.
  3. System is installed and inspected before backfill.

Drain Field Repair and Replacement

• What's included: diagnosis of drain-field failure, replacement of failing trenches or lines, soil restoration, and final testing to verify performance.
• Milliken-specific notes: roots, compacted soils, and seasonal moisture shifts can influence repair scope; in tight lots, replacement may require more creative trenching or alternative field design.
• Typical cost in Milliken: $5,000–$20,000 depending on the extent (full replacement vs. partial repair) and access.
• Quick steps you can expect:
  1. Field assessment using pressure tests or soil probes.
  2. Plan development for replacement or rehab.
  3. Installation and post-installation inspection.

Minor Repairs and Component Replacements

• What's included: pump repairs or replacements, valve/baffle fixes, line snaking for blockage, and minor trench maintenance.
• Milliken-specific notes: tree roots and aging components are common contributors to these issues.
• Typical cost in Milliken: $150–$800 for minor fixes; $300–$1,200 for pump replacements or more involved component work.
• Quick steps you can expect:
  1. Diagnostics to identify the faulty part.
  2. Replacement or repair with parts meeting local standards.
  3. System test to confirm normal operation.

Tank Decommissioning and System Abandonment

• What's included: emptying, removing or sealing the old tank, backfilling, and documenting decommissioned status per code.
• Milliken-specific notes: required when converting to sewer connection or when removing an outdated system.
• Typical cost in Milliken: $1,200–$3,000.
• Quick steps you can expect:
  1. Tank is pumped and emptied.
  2. Tank is removed or sealed; site is backfilled and compacted.
  3. Final paperwork and inspection confirmation.

Permitting and regulatory costs to plan for

• Permits and inspections are typically required through Weld County Health Department and Colorado CDPHE oversight.
• Typical permit fees: roughly $100–$600 depending on the project scope; inspection fees may apply.
• Seasonal timing: winter weather can delay access or drive times to disposal facilities, extending turnaround in Milliken.

Resources

• EPA Septic Systems: