Septic in Decatur, IL

Last updated: Mar 21, 2026

Decatur sits in the heart of central Illinois, where quiet streets and friendly yards make every home feel a little like a good neighborly project. In many Decatur neighborhoods, you'll find a common, practical setup behind a hedge: a private septic system serving the house. Septic is a familiar part of our housing landscape, especially for homes outside the city sewer lines or built before extensive municipal extensions reached the area.

Is septic common in Decatur? Should I expect septic if I own or buy a home? Yes—septic is a typical reality for many Decatur homes, particularly those outside the core city limits, on larger lots, or in older subdivisions where sewer connections weren't extended. If your home isn't tied to the municipal sewer, you should expect a septic system. If you're buying, it's smart to ask for septic records and schedule a professional inspection as part of your due diligence so you know what maintenance lies ahead.

Why homes typically use septic systems in Decatur

  • Lot size and layout: Many Decatur homes sit on lots where extending a sewer main isn't practical or cost-effective, making a private septic system a sensible alternative.
  • Soil and drainage: Central Illinois soils often include clay-rich layers that require a properly designed drain field to treat wastewater safely.
  • Water sources: Private wells are still common in parts of town, and septic systems pair naturally with well water use in these areas.
  • Cost and autonomy: A septic system provides homeowners with control over wastewater management and avoids ongoing city sewer charges.

High-level explanation (why septic exists here)

Think of a septic system as a simple, soil-based treatment plant for your home wastewater. Waste flows from the house into a tank where solids settle, the liquid portion moves to a drain field, and the soil and its friendly microbes finish the job. When sized correctly and kept up with regular maintenance, a septic system can serve a household for decades. In Decatur, drainage, seasonal rainfall, and local soil variations all influence how a drain field performs, which is why proper sizing and professional maintenance matter.

Here in Decatur, you'll find practical, neighborly guidance for keeping your system reliable and letting you focus on home and family. In the sections ahead, you'll find practical steps for maintenance, inspection, and what to ask when you hire help.

Where Septic Systems Are Common in Decatur

Map of septic coverage in Decatur, IL

Areas where septic systems are most common

  • Outside the city's municipal sewer service area: Many Decatur residents living in rural parcels or on the outskirts rely on septic systems because sewer lines don't reach those parts yet.
  • Large-lot and rural properties: Homes on 1 acre or more often use septic, especially where lot size and soil conditions make central sewer expansion impractical.
  • Older subdivisions built before sewer expansion: Some early developments in and around Decatur were created before widespread sewer access, so septic remained the practical option for those homes.
  • Agricultural or mixed-use parcels: Farms and country properties near Decatur commonly use on-site wastewater systems to manage waste.

Why these areas remain septic

  • Cost and logistics of extending sewer lines: Extending a city sewer system to rural or sparsely populated areas can be expensive and technically challenging, so many parcels continue to rely on private systems.
  • Soil and drainage suitability: On-site systems work best in soils with adequate percolation and drainage. In some patches around Decatur, soil conditions favor a properly designed septic system over a public sewer connection.
  • Local governance and regulation: In areas not served by the city sewer, onsite wastewater management is typically overseen by state and county authorities, with design and maintenance guidance from Illinois EPA and county health departments. This makes private septic the standard for those parcels.
  • Historical development patterns: Development that predates sewer expansion often left properties on septic, and updating those systems often comes with separate financing and permitting considerations.

How to tell if your Decatur property uses a septic system

  1. Check the sewer service boundary: Look up the City of Decatur's sewer service area map or contact the city to confirm whether your property falls inside or outside the municipal sewer boundary. Official resources: City of Decatur public utilities pages (home of the sewer service area) and guidance on septic vs. sewer connections.
  2. Inspect for septic features in the yard: Common indicators include a buried septic tank access lid, a cleanout in the yard, or a drainfield area that looks discolored or built up with grass growth patterns.
  3. Review property records: Deeds, tax assessments, or disclosure statements often note an onsite wastewater system or septic if present.
  4. Get a professional assessment: If you're unsure, hire a licensed septic contractor or a soil/site professional to locate and evaluate the system and confirm its condition.

Maintenance basics for Decatur-area septic systems

  • Pump on a schedule: Most households pump every 3–5 years, but frequency depends on tank size, household size, and water usage. Regular pumping helps prevent backups and deterioration of the drainfield.
  • Manage what goes in: Avoid dumping fats, oils, grease, solvents, paints, and harsh chemicals. Minimize heavy use of garbage disposals where possible.
  • Protect the drainfield: Keep heavy equipment off the drainfield area and limit vehicle traffic. Plant only shallow-rooted grasses or non-invasive ground cover to reduce soil compaction.
  • Watch for signs of trouble: Slow drains, gurgling toilets, wet spots or strong odors in the yard, or sewage odors indoors warrant a professional evaluation.
  • Routine inspections: Have a septic professional perform periodic inspections to ensure baffles, filters, and the tank are functioning properly and that the system isn't failing due to groundwater or soil issues.

Helpful official resources

Septic vs Sewer: What Homeowners in Decatur Should Know

How septic systems and sewers work in Decatur

  • Municipal sewer: Wastewater from your home travels through a network of underground pipes to a treatment plant. You're billed by the city or utility for sewer service, and the system is maintained by the municipality.
  • On-site septic system: A private system consists of a septic tank and a drainfield. The homeowner is responsible for maintenance, pumping, and ensuring the system functions properly. If a drainfield fails, it can contaminate groundwater and require repair or replacement.

Key differences at a glance

  • Ownership and responsibility
    • Sewer: City/municipality owns and maintains the sewer lines and treatment plant.
    • Septic: You own and maintain the onsite system (with regular pumping and inspections).
  • Costs over time
    • Sewer: Regular monthly/quarterly sewer charges.
    • Septic: Pumping every few years, plus potential repair or replacement of components.
  • Space and location
    • Sewer: No on-lot drainfield needed; space is less of a concern for operation.
    • Septic: Requires suitable soil and adequate setbacks; drainfield area must be kept clear.
  • Environmental and regulatory factors
    • Sewer: Subject to city/wastewater regulations and capacity planning.
    • Septic: Requires permits, inspections, and periodic professional maintenance to prevent failures.

City of Decatur sewer services and septic options

  • Within city limits, many homes are connected to the municipal sewer system; outside the city or on older subdivisions, septic systems are common.
  • If you already have a septic system, you'll want to maintain it to avoid failures and costly repairs. If sewer service becomes available in your area, policy on connection may vary—check with the local utility for current requirements and timelines.
  • Verification and guidance
    • Confirm service status with the City of Decatur Utilities or Public Works.
    • If considering a transition from septic to sewer, obtain a formal assessment and cost estimate from the city.

Costs and long-term considerations

  • Upfront vs ongoing
    • Septic: Higher upfront costs for installation (tank, drainfield, permits) but lower ongoing monthly charges.
    • Sewer: Regular monthly sewer charges; potential connection or hookup fees if joining a new service area.
  • Site and soil impact
    • Soil type, slope, and groundwater influence drainfield size and viability.
  • Longevity and risk
    • Properly maintained septic systems can last decades; neglect increases failure risk, which is costly and disruptive.
  • Environmental and water use
    • High water usage or inappropriate waste disposal increases pressure on septic systems and can lead to failures.

Maintenance and compliance

  • Schedule regular pumping
    • Most septic systems benefit from pumping every 3–5 years, depending on household size, tank size, and usage.
  • Protect the drainfield
    • Avoid heavy vehicles or structures on the drainfield, reduce irrigation near it, and divert surface water away from the area.
  • Mind your waste
    • Use septic-safe products; don't put non-degradables, chemicals, or fats/oils down the drain.
  • Keep records
    • Maintain records of pump dates, inspections, and any repairs; this helps with future sale or service needs.

Step-by-step decision checklist for Decatur homeowners

  1. Identify your current service status: connected to sewer or on a private septic system.
  2. Determine property constraints: soil type, drainfield size, and available lot space.
  3. Assess water usage: larger households or high daily discharge may favor sewer or a larger septic system.
  4. Gather cost estimates: obtain quotes for septic installation/repair versus sewer hookup and ongoing charges.
  5. Review permits and codes: confirm any required inspections, setbacks, and local regulations.
  6. Plan for long-term needs: consider home improvements, aging infrastructure, and potential conversion timelines.

Official resources

  • EPA: Septic systems overview and guidance (official):
  • City of Decatur Public Works (official department page): https://www.cityofdecatur.com/departments/public-works

Typical Septic System Types in Decatur

Conventional septic systems

Most Decatur homes on suitable soils rely on a conventional gravity system: a septic tank to separate solids, followed by a soil absorption field (drain field) to treat the liquid effluent. The drain field distributes the liquid evenly through perforated pipes buried in gravel-filled trenches.

  • When you'll see them: standard lots with good soil and adequate depth to groundwater.
  • Key components: septic tank, distribution box, lateral lines, and an absorption field.
  • Pros: simple design, generally lower upfront cost, easy to service with routine pumping.
  • Cons: performance depends on soil type and groundwater; poor soils or high water tables may require alternatives. Learn more from the Illinois Department of Public Health: [Onsite Wastewater Treatment Systems]((IDPH).

Mound systems

Mound systems are raised to keep effluent treatment above shallow soil or high groundwater. They use a sand fill layer and a smaller native soil layer at the surface, with a separate dosing system to distribute effluent into the mound.

  • When they're used: shallow bedrock, severe restrictive soils, or high water tables in Decatur-area soils.
  • How they work: a conventional tank plus a large raised mound with sand over native soil for the drain field.
  • Pros: allows proper treatment where standard fields won't work; durable and reliable with maintenance.
  • Cons: higher initial cost and more maintenance; needs space for the mound and access for maintenance. See IDPH guidance for design considerations: [Onsite Wastewater Treatment Systems](https://www.dph.illinois.gov/topics-services/environment/onsite-wastewater-treatment-systems).

Aerobic Treatment Units (ATU)

ATUs pre-treat wastewater with controlled aerobic digestion, producing higher-quality effluent than a conventional system. They're often paired with a small drain field or spray irrigation.

  • When they're used: challenging soils, high water tables, or lots that need a smaller drain field.
  • How they work: electric-powered aeration and filtration, then discharge to a drain field or reuse system.
  • Pros: better effluent quality; can reduce required drain-field area; suitable for limited space.
  • Cons: more energy use and maintenance; requires regular servicing and electrical reliability. More information is available from the EPA: [Septic Systems](https://www.epa.gov/septic).

Sand filter systems

A sand filter bed receives pretreated effluent and passes it through a sand media for additional polishing before it's discharged to the soil.

  • When they're used: steeper terrains or soils with limited natural absorption.
  • How they work: effluent from the tank is pumped to a sand filter; treated water then moves to a drain field.
  • Pros: improves treatment in problematic soils; can extend system life in tough sites.
  • Cons: higher maintenance and careful monitoring of flow to prevent clogging. Local designers can advise on suitability and maintenance schedules.

Drip irrigation / effluent irrigation systems

Some properties use treated effluent for landscape irrigation, especially where water conservation is a priority. These require specialized design, filtration, and regulatory approval.

  • How they work: treated effluent is delivered through tubing to landscape areas.
  • Pros: water reuse and potential space savings for drain fields.
  • Cons: stricter maintenance, monitoring for roots and emitters, and regulatory approvals.

Cluster or shared septic systems

In subdivisions or clustered developments, a single larger system serves multiple homes, reducing per-home footprint and allowing centralized maintenance.

  • How they're designed: multiple septic tanks feeding a shared drain field or treatment facility.
  • Pros: potential cost savings and easier long-term maintenance for a community.
  • Cons: shared responsibility and coordination with the homeowners' association or property owners.

Holding tanks

In limited cases (new builds, flood-prone lots, or sites with perpetual drainage concerns), a holding tank may be used temporarily or where disposal drainage is restricted.

  • How they work: stores wastewater until pumped out by a licensed contractor.
  • Pros: flexible in challenging sites.
  • Cons: ongoing pumping costs and frequent servicing; not a long-term disposal solution in most Decatur sites.

How to determine the right type for your Decatur property

  1. Have a licensed onsite wastewater professional perform a soil and site evaluation.
  2. Check groundwater depth, bedrock, slope, and lot size.
  3. Review local approvals and state requirements (IDPH guidance above).
  4. Consider landscaping needs, future home plans, and maintenance commitments.
  5. Hire a licensed installer to design and install the chosen system.

Resources:

Common Septic Issues in Decatur

Drainfield problems and soil absorption

  • Symptoms: standing water or damp patches over the drainfield, slow soil absorption, and lingering odors near the leach field.
  • Why it happens in Decatur: parts of Macon County have clay-heavy soils and a seasonal rise in the water table, especially after heavy rains or snowmelt. These conditions make it harder for effluent to percolate, causing backups or surface wet areas.
  • What to do:
    1. Have a licensed septic contractor perform a drainfield evaluation.
    2. If absorption is poor, options include upgrading the field, repairing damaged lines, or considering an alternative system (e.g., mound system) if soil is consistently unsuitable.
    3. Protect the area from compaction, heavy equipment, and irrigation over the drainfield.

Slow drains and backups

  • Symptoms: toilets and sinks drain slowly; frequent need to flush or snaking drains.
  • Decatur-specific factors: heavy spring rainfall can saturate soils and push effluent back toward the house, while clay soils delay drainage.
  • What to do:
    1. Reduce water use during wet periods (spreads out load on the system).
    2. Avoid flushing non-biodegradable items, grease, and wipes.
    3. Schedule a professional inspection if backups recur; there may be cracked pipes or a failing tank.

Tree roots and landscaping intrusion

  • Symptoms: sudden backups, gurgling pipes, or soil displacement over the drainfield.
  • Why it matters here: trees planted near the system can send roots into pipes and intercept lines, especially in yards with shallow beds or older installations.
  • What to do:
    1. Have roots inspected by a licensed pro.
    2. Prune or reroute landscaping away from the system; install root barriers if advised.
    3. Consider relocating plantings if roots threaten the field.

Maintenance neglect and improper pumping

  • Symptoms: odors, slow drainage, or a tank that appears full during inspection.
  • What's unique in Decatur: busy households and seasonal use can lead to missed pumping intervals if homeowners rely on outdated schedules.
  • What to do:
    1. Schedule regular septic pumping per local or contractor guidance (often every 3–5 years for typical residential systems, but use a professional assessment to set a plan).
    2. Keep a maintenance log for pumps, filters, and inspections.
    3. Use effluent filters where recommended and ensure proper baffles inside the tank.

Nitrate and groundwater considerations

  • Why this matters in Decatur: agricultural activity in central Illinois can influence groundwater quality. If a septic system is near a well, nutrient loading may pose a risk to drinking water quality.
  • What to do:
    1. If you have a well, test groundwater periodically for nitrates and ensure the well is properly sealed and at an appropriate distance from the septic field.
    2. Have a professional assess any potential cross-contamination risks and discuss best practices for aging systems near agricultural areas.
    3. Refer to state guidance on safe separation distances between septic systems and wells (see official resources below).

Freezing, ice, and winter concerns

  • Symptoms: frozen access ports, frozen pump chambers, or disrupted operation during extreme cold.
  • What to do:
    1. Keep vent and access covers clear of snow and debris so the system can vent properly.
    2. In cold periods, minimize water usage spikes (e.g., avoid large loads of laundry or dishwashing during freezes).
    3. Have a technician inspect for frost heave or frost-related damage if issues persist after thaw.

Quick checks you can do safely

  • Visual signs: lush patches over the drainfield, strong odors, and unusually wet areas in the yard.
  • Listening checks: gurgling sounds in plumbing or toilets.
  • Routine steps: protect the drainfield, avoid chemical cleaners that kill beneficial bacteria, and update appliances to reduce wastewater load.

Resources

Septic Inspection, Permits & Local Oversight

Who regulates septic systems in Decatur

  • Illinois EPA oversees the statewide Onsite Wastewater Treatment Program and sets the framework for how systems are planned, installed, and maintained.
  • Macon County Health Department typically handles local permits, plan reviews, and field inspections for residential onsite wastewater systems (private septic systems) within the county. If you're inside City of Decatur limits, there may be additional city requirements or inspections through the local building or health departments.
  • If your property is connected to municipal sewer, the process shifts to sewer connection permits and decommissioning of any existing onsite system.

Permits you need

  • Before installing or modifying a septic system, you almost certainly need a permit from the local health department (Macon County in Decatur's area). A licensed designer or engineer often prepares the plan, including soil testing and system layout.
  • Plan requirements typically include: site plan, soil evaluation results, proposed drain field design, and a proposed septic tank layout. An onsite permit is issued only after plan review.
  • If you later connect to a municipal sewer, you'll need a sewer connection permit and you may need to decommission the old septic system per local rules.
  • Within city limits, verify whether the City of Decatur's building or environmental health office also requires approvals in addition to the county permit.

Inspections: what to expect

  • Inspections are scheduled as the project progresses and are performed by a qualified local inspector. Typical milestones include:
    1. Pre-construction/site evaluation and soil test verification.
    2. Excavation and installation of septic tank(s) and piping.
    3. Drain field installation, backfill, and trenching checks.
    4. Final inspection and acceptance, plus any required as-built drawings.
  • The permit should be posted at the work site; inspectors verify setbacks, system components, and proper connections. If issues are found, you'll receive corrections to address before the project passes.
  • After final inspection, keep the approved plans and any "as-built" drawings for your records and future property transactions.

Inside Decatur city limits: extra steps

  • Check with the local City Building Department or Health/Environmental Health office for any city-specific requirements, permits, or inspection schedules.
  • Some city requirements may require additional permits or notifications even if the county has already issued an OWTS permit.
  • Always confirm contact points and current procedures with the local offices before starting work to avoid delays.

Maintaining compliance and records

  • After installation, maintain your system per the manufacturer and local health department guidance. Regular pumping and inspection are crucial for long-term performance.
  • Keep all permits, inspection reports, and as-built drawings in a safe place. If the property is sold, you may need to provide documentation to the buyer or lender.
  • If a system is pumped or repaired, report work to the county health department as required and maintain service receipts.

Helpful resources

  • Illinois EPA: Onsite Wastewater Treatment Program (statewide guidance, approvals, and contact information) — https://www2.illinois.gov/epa/topics/water-quality/onsite-wastewater/Pages/default.aspx
  • Local contact channels: Macon County Health Department and your city's building/health offices will provide exact permit steps, fees, and inspection schedules for Decatur-area homes. Check their official pages or call to confirm current requirements and to start the permit process.

Septic Maintenance for Homes in Decatur

Local conditions in Decatur, IL

Decatur sits in central Illinois with tended-to clay soils, variable groundwater, and cold winters. Heavy spring rains can saturate the soil and slow drainage, stressing septic systems. The combination of clay-rich soils and seasonal saturation means your drain field needs a little extra room to "breathe." Keep heavy equipment, construction debris, and compacting activities off the drain field, and be mindful of tree roots near the system. In Decatur, regular pumping and careful water management are especially important to prevent backups and field damage.

Preventive maintenance: pumping and inspections for Decatur homes

A proactive plan protects your tank and drain field in Decatur's climate. Follow these steps:

  1. Schedule inspections with a licensed septic professional every 3–5 years, or sooner if your household uses a lot of water or you notice symptoms like gurgling sounds, sluggish drains, or pooling on the drain field.
  2. Have the septic tank pumped by a licensed pumper when/if the professional recommends it, based on tank size and waste volume.
  3. Keep a maintenance record: tank size, date of pumping, inspection notes, and any repairs for easy future reference.
  4. Ensure access hatches and lids are visible and secure, with clear space around the tank for future service.

Routine maintenance checklist

  • Use water efficiently: spread high-water-use activities (laundry, bathing) across the day; fix leaks promptly.
  • Mind what goes down the drain: put fats, oils, grease, solids, chemicals, solvents, cat litter, and diapers in the trash (not the toilet or sinks).
  • Protect the drain field: keep the area free of vehicles, heavy equipment, and construction, and avoid parking on or near the field.
  • Plant wisely: avoid deep-rooted trees or shrubs directly over the drain field; grass is best, as roots won't disrupt transmission lines or drainage.
  • Monitor drainage: if you notice slow draining, surface wet spots, or strong odors, call your septic professional promptly.
  • Maintain surface runoff: downspouts and sump pumps should discharge away from the septic system and drain field.

Decatur-specific practices to protect your drain field

  • Manage rainfall impact: in wet seasons, reduce water use and make sure gutters and sump pumps direct water away from the drain field to prevent oversaturation.
  • Ground and lawn care: avoid digging or installing irrigation lines over the drain field; if you reseed or regrass, do so away from the field area to minimize compaction.
  • Winter readiness: in freezing months, prevent blockages from ice buildup by keeping access lids clear and ensuring there's no buildup of snow directly over the field, which can cause frost heave or drainage issues.

Winter and seasonal considerations for Decatur

  • Cold snaps can slow soil microbes and drainage; keep water use steady but moderate to avoid overloading the tank when soils are frozen.
  • When temperatures drop, avoid driving or parking on the drain field and monitor for frost heave around lids and risers.
  • Snow removal should not cover or bury the tank lids; keep them accessible for inspections and pumping if needed.

Resources and local regulations

Cost Expectations for Septic Services in Decatur

Septic Tank Pumping and Cleaning

  • What it includes: removal of sludge and scum from the tank, inspection of baffles and tank integrity, and a basic check of inlet/outlet conditions. Access and tank size affect how long it takes and how much soil disposal is charged.
  • How Decatur specifics can influence price: older cement tanks and tighter access can raise labor time and disposal costs; larger tanks (>1,000 gallons) cost more to pump.
  • Typical cost in Decatur: roughly $250–$600. For larger homes or tanks with extra features (eg, effluent filters to clean), expect $350–$750.
  • Quick planning steps:
    1. Check tank size and accessibility before scheduling.
    2. Ask about effluent filter cleaning if present.
    3. Schedule in spring or fall when demand is lower and crews aren't idle in worst weather.
  • Official resources: Illinois EPA On-site Wastewater Treatment Systems (OWTS):

Septic System Inspection

Drain Field Evaluation and Repair

  • What it includes: soil condition assessment, infiltration tests, trench or bed evaluation, and determination of whether repair or replacement is needed.
  • Decatur specifics: central Illinois soils can present drainage challenges; evaluations may include more detailed soil probing to confirm absorption capacity before any repair.
  • Typical cost in Decatur:
    • Evaluation/testing: $500–$1,500
    • Minor repair or re-seeding: $2,000–$6,000
    • Full drain-field replacement or mound systems: $8,000–$25,000+ (depends on size and site)
  • Quick planning steps:
    1. Get multiple quotes for any repair work and ask about permit requirements.
    2. Discuss long-term performance and maintenance to avoid repeat failures.
    3. Factor in soil restoration or grass seeding plans after repair.
  • Official resources: Illinois EPA OWTS: https://www2.illinois.gov/epa/topics/waste-management/wastewater/onsite/Pages/default.aspx

New System Design and Permitting

Septic System Repairs

  • What it includes: seal/baffle replacements, pump and float replacements, line cleanouts, and addressing broken lids or failed components.
  • Typical cost in Decatur: minor repairs $200–$800; major repairs $1,500–$4,000; pump or lift replacements $500–$2,500.
  • Quick planning steps:
    1. Identify whether the issue is mechanical or sphincter/valve related.
    2. Check for water overuse or chemical discharge that may stress the system.
    3. Arrange a repair window that avoids peak outdoor usage.
  • Official resources: IEPA OWTS: https://www2.illinois.gov/epa/topics/waste-management/wastewater/onsite/Pages/default.aspx

Pump, Alarm, and Schedule Maintenance

  • What it includes: pump testing, alarm verification, float adjustments, and routine servicing to prevent surprises.
  • Typical cost in Decatur: service call $100–$200, pump replacement $700–$2,000, alarm $50–$150.
  • Quick planning steps:
    1. Set a regular maintenance cadence (annually or every 2–3 years for older systems).
    2. Consider a maintenance contract that covers pump testing and minor repairs.
  • Official resources: IEPA OWTS: https://www2.illinois.gov/epa/topics/waste-management/wastewater/onsite/Pages/default.aspx

Camera Inspection and Line Cleaning

  • What it includes: CCTV inspection of sewer lines from the house to the tank or drain field; cleaning of blockages if needed.
  • Typical cost in Decatur: camera inspection $150–$500; line cleaning $300–$1,500 depending on length and access.
  • Quick planning steps:
    1. Combine with a pumping or inspection to maximize value.
    2. Ask about root intrusion and preventive solutions after cleaning.
  • Official resources: IEPA OWTS: https://www2.illinois.gov/epa/topics/waste-management/wastewater/onsite/Pages/default.aspx

Preventative Maintenance Plans

  • What it includes: annual or biannual checkups, filter cleaning, and priority scheduling for pumping or repairs.
  • Typical cost in Decatur: $100–$300 per year for a basic plan; more comprehensive plans run higher.
  • Quick planning steps:
    1. Evaluate how quickly your tank accumulates sludge based on household size and water use.
    2. Choose a plan that covers urgent call-outs and routine maintenance.
  • Official resources: IEPA OWTS: https://www2.illinois.gov/epa/topics/waste-management/wastewater/onsite/Pages/default.aspx

Official Resources